├── .gitignore ├── .idea ├── codeStyles │ └── Project.xml ├── encodings.xml ├── gradle.xml ├── markdown-navigator.xml ├── markdown-navigator │ └── profiles_settings.xml ├── misc.xml ├── runConfigurations.xml └── vcs.xml ├── README.md ├── SlideNestedPanel ├── .gitignore ├── build.gradle ├── proguard-rules.pro └── src │ ├── androidTest │ └── java │ │ └── com │ │ └── snail │ │ └── slidenested │ │ └── ExampleInstrumentedTest.java │ ├── main │ ├── AndroidManifest.xml │ ├── java │ │ └── com │ │ │ └── snail │ │ │ └── slidenested │ │ │ ├── PanelLayoutParams.java │ │ │ ├── PanelSlideListener.java │ │ │ ├── PanelState.java │ │ │ ├── ScrollableViewHelper.java │ │ │ ├── SlideNestedPanelLayout.java │ │ │ ├── StateCallback.java │ │ │ └── ViewDragHelper.java │ └── res │ │ └── values │ │ ├── attrs.xml │ │ └── strings.xml │ └── test │ └── java │ └── com │ └── snail │ └── slidenested │ └── ExampleUnitTest.java ├── app ├── .gitignore ├── build.gradle ├── proguard-rules.pro └── src │ ├── androidTest │ └── java │ │ └── com │ │ └── snail │ │ └── slidenested │ │ └── ExampleInstrumentedTest.java │ ├── main │ ├── AndroidManifest.xml │ ├── java │ │ └── com │ │ │ └── snail │ │ │ └── slidenested │ │ │ └── MainActivity.java │ └── res │ │ ├── drawable-v24 │ │ └── ic_launcher_foreground.xml │ │ ├── drawable │ │ ├── bg_cardview_white_top.xml │ │ └── ic_launcher_background.xml │ │ ├── layout │ │ ├── activity_main.xml │ │ ├── include_main_content.xml │ │ └── include_main_top.xml │ │ ├── mipmap-anydpi-v26 │ │ ├── ic_launcher.xml │ │ └── ic_launcher_round.xml │ │ ├── mipmap-hdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ ├── mipmap-mdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ ├── mipmap-xhdpi │ │ ├── ic_launcher.png │ │ ├── ic_launcher_round.png │ │ ├── icon_back_white.png │ │ ├── icon_tour_background.png │ │ ├── icon_tour_forward.png │ │ ├── icon_tour_label.png │ │ ├── icon_tour_location.png │ │ ├── icon_tour_loved.png │ │ └── icon_tour_map.png │ │ ├── mipmap-xxhdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ ├── mipmap-xxxhdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ └── values │ │ ├── colors.xml │ │ ├── strings.xml │ │ └── styles.xml │ └── test │ └── java │ └── com │ └── snail │ └── slidenested │ └── ExampleUnitTest.java ├── build.gradle ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── screenshot └── sample.gif └── settings.gradle /.gitignore: -------------------------------------------------------------------------------- 1 | *.iml 2 | .gradle 3 | /local.properties 4 | /.idea/caches/build_file_checksums.ser 5 | /.idea/libraries 6 | /.idea/modules.xml 7 | /.idea/workspace.xml 8 | .DS_Store 9 | /build 10 | /captures 11 | .externalNativeBuild 12 | -------------------------------------------------------------------------------- /.idea/codeStyles/Project.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 15 | 16 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | -------------------------------------------------------------------------------- /.idea/encodings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /.idea/gradle.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 18 | 19 | -------------------------------------------------------------------------------- /.idea/markdown-navigator.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 36 | 37 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | -------------------------------------------------------------------------------- /.idea/markdown-navigator/profiles_settings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | -------------------------------------------------------------------------------- /.idea/misc.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 19 | 31 | 32 | 33 | 34 | 35 | 36 | 38 | -------------------------------------------------------------------------------- /.idea/runConfigurations.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 11 | 12 | -------------------------------------------------------------------------------- /.idea/vcs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # SlideNestedPanelLayout 2 | 仿美团订单的拖拽面板，内部处理嵌套滑动逻辑，动效查看效果图 3 | 4 | 参考资源：https://github.com/woxingxiao/SlidingUpPanelLayout 5 | 6 | 先看效果图，客观满意再star一波 7 | 8 | ![image](https://github.com/BmobSnail/SlideNestedPanelLayout/blob/master/screenshot/sample.gif) 9 | 10 | #### v.1.0.0 11 | - 1.主要针对上述库精简 12 | - 2.解决了内嵌 ScrollView 得滑动 13 | - 3.增加了状态回调 14 | - 4.加个人理解的中文注释方便学习 15 | - 5.还有不完善的地方 16 | 17 | 18 | -------------------------------------------------------------------------------- /SlideNestedPanel/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /SlideNestedPanel/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.library' 2 | 3 | android { 4 | compileSdkVersion 28 5 | 6 | 7 | 8 | defaultConfig { 9 | minSdkVersion 19 10 | targetSdkVersion 28 11 | versionCode 1 12 | versionName "1.0" 13 | 14 | testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 15 | 16 | } 17 | 18 | buildTypes { 19 | release { 20 | minifyEnabled false 21 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 22 | } 23 | } 24 | 25 | } 26 | 27 | dependencies { 28 | implementation fileTree(dir: 'libs', include: ['*.jar']) 29 | 30 | implementation 'com.android.support:appcompat-v7:28.0.0' 31 | implementation "com.android.support:recyclerview-v7:28.0.0" 32 | testImplementation 'junit:junit:4.12' 33 | androidTestImplementation 'com.android.support.test:runner:1.0.2' 34 | androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2' 35 | } 36 | -------------------------------------------------------------------------------- /SlideNestedPanel/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # You can control the set of applied configuration files using the 3 | # proguardFiles setting in build.gradle. 4 | # 5 | # For more details, see 6 | # http://developer.android.com/guide/developing/tools/proguard.html 7 | 8 | # If your project uses WebView with JS, uncomment the following 9 | # and specify the fully qualified class name to the JavaScript interface 10 | # class: 11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 12 | # public *; 13 | #} 14 | 15 | # Uncomment this to preserve the line number information for 16 | # debugging stack traces. 17 | #-keepattributes SourceFile,LineNumberTable 18 | 19 | # If you keep the line number information, uncomment this to 20 | # hide the original source file name. 21 | #-renamesourcefileattribute SourceFile 22 | -------------------------------------------------------------------------------- /SlideNestedPanel/src/androidTest/java/com/snail/slidenested/ExampleInstrumentedTest.java: -------------------------------------------------------------------------------- 1 | package com.snail.slidenested; 2 | 3 | import android.content.Context; 4 | import android.support.test.InstrumentationRegistry; 5 | import android.support.test.runner.AndroidJUnit4; 6 | 7 | import org.junit.Test; 8 | import org.junit.runner.RunWith; 9 | 10 | import static org.junit.Assert.*; 11 | 12 | /** 13 | * Instrumented test, which will execute on an Android device. 14 | * 15 | * @see Testing documentation 16 | */ 17 | @RunWith(AndroidJUnit4.class) 18 | public class ExampleInstrumentedTest { 19 | @Test 20 | public void useAppContext() { 21 | // Context of the app under test. 22 | Context appContext = InstrumentationRegistry.getTargetContext(); 23 | 24 | assertEquals("com.snail.slidenested.test", appContext.getPackageName()); 25 | } 26 | } 27 | -------------------------------------------------------------------------------- /SlideNestedPanel/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 3 | -------------------------------------------------------------------------------- /SlideNestedPanel/src/main/java/com/snail/slidenested/PanelLayoutParams.java: -------------------------------------------------------------------------------- 1 | package com.snail.slidenested; 2 | 3 | import android.content.Context; 4 | import android.content.res.TypedArray; 5 | import android.util.AttributeSet; 6 | import android.view.ViewGroup; 7 | 8 | /** 9 | * author：created by Snail.江 10 | * time: 2018/12/21 14:26 11 | * email：409962004@qq.com 12 | * TODO: 自定义布局属性 13 | */ 14 | public class PanelLayoutParams extends ViewGroup.MarginLayoutParams { 15 | 16 | private static final int[] ATTRS = {android.R.attr.layout_weight}; 17 | 18 | public float weight = 0; 19 | 20 | public PanelLayoutParams() { 21 | super(MATCH_PARENT, MATCH_PARENT); 22 | } 23 | 24 | public PanelLayoutParams(int width, int height) { 25 | super(width, height); 26 | } 27 | 28 | public PanelLayoutParams(int width, int height, int weight) { 29 | this(width, height); 30 | this.weight = weight; 31 | } 32 | 33 | public PanelLayoutParams(ViewGroup.LayoutParams source) { 34 | super(source); 35 | } 36 | 37 | public PanelLayoutParams(ViewGroup.MarginLayoutParams source) { 38 | super(source); 39 | } 40 | 41 | public PanelLayoutParams(PanelLayoutParams source) { 42 | super(source); 43 | } 44 | 45 | 46 | public PanelLayoutParams(Context c, AttributeSet attrs) { 47 | super(c, attrs); 48 | 49 | final TypedArray ta = c.obtainStyledAttributes(attrs, ATTRS); 50 | if (ta != null) { 51 | this.weight = ta.getFloat(0, 0); 52 | ta.recycle(); 53 | } 54 | } 55 | } 56 | -------------------------------------------------------------------------------- /SlideNestedPanel/src/main/java/com/snail/slidenested/PanelSlideListener.java: -------------------------------------------------------------------------------- 1 | package com.snail.slidenested; 2 | 3 | import android.view.View; 4 | 5 | /** 6 | * author：created by Snail.江 7 | * time: 2018/12/21 11:55 8 | * email：409962004@qq.com 9 | * TODO: 面板滑动回调 10 | */ 11 | public interface PanelSlideListener { 12 | 13 | //当面板滑动位置发送变化 14 | void onPanelSlide(View panel,float slideOffset); 15 | 16 | 17 | //当面板状态发送变化 18 | void onPanelStateChanged(View panel,PanelState preState,PanelState newState); 19 | } 20 | -------------------------------------------------------------------------------- /SlideNestedPanel/src/main/java/com/snail/slidenested/PanelState.java: -------------------------------------------------------------------------------- 1 | package com.snail.slidenested; 2 | 3 | /** 4 | * author：created by Snail.江 5 | * time: 2018/12/21 11:56 6 | * email：409962004@qq.com 7 | * TODO: 面板状态 8 | */ 9 | public enum PanelState { 10 | 11 | EXPANDED, 12 | COLLAPSED, 13 | ANCHORED, 14 | DRAGGING 15 | } 16 | -------------------------------------------------------------------------------- /SlideNestedPanel/src/main/java/com/snail/slidenested/ScrollableViewHelper.java: -------------------------------------------------------------------------------- 1 | package com.snail.slidenested; 2 | 3 | import android.support.v4.widget.NestedScrollView; 4 | import android.support.v7.widget.RecyclerView; 5 | import android.view.View; 6 | import android.widget.FrameLayout; 7 | import android.widget.ListView; 8 | import android.widget.ScrollView; 9 | 10 | /** 11 | * Helper class for determining the current scroll positions for scrollable views. Currently works 12 | * for ListView, ScrollView and RecyclerView, but the library users can override it to add support 13 | * for other views. 14 | */ 15 | public class ScrollableViewHelper { 16 | /** 17 | * Returns the current scroll position of the scrollable view. If this method returns zero or 18 | * less, it means at the scrollable view is in a position such as the panel should handle 19 | * scrolling. If the method returns anything above zero, then the panel will let the scrollable 20 | * view handle the scrolling 21 | * 22 | * @param view the scrollable view 23 | * @param isSlidingUp whether or not the panel is sliding up or down 24 | * @return the scroll position 25 | */ 26 | public int getScrollableViewScrollPosition(View view, boolean isSlidingUp) { 27 | if (view == null) return 0; 28 | if (view instanceof ScrollView || view instanceof NestedScrollView) { 29 | if (isSlidingUp) { 30 | return view.getScrollY(); 31 | } else { 32 | FrameLayout sv = (FrameLayout) view; 33 | View child = sv.getChildAt(0); 34 | return (child.getBottom() - (sv.getHeight() + sv.getScrollY())); 35 | } 36 | } else if (view instanceof ListView && ((ListView) view).getChildCount() > 0) { 37 | ListView lv = ((ListView) view); 38 | if (lv.getAdapter() == null) return 0; 39 | if (isSlidingUp) { 40 | View firstChild = lv.getChildAt(0); 41 | // Approximate the scroll position based on the top child and the first visible item 42 | return lv.getFirstVisiblePosition() * firstChild.getHeight() - firstChild.getTop(); 43 | } else { 44 | View lastChild = lv.getChildAt(lv.getChildCount() - 1); 45 | // Approximate the scroll position based on the bottom child and the last visible item 46 | return (lv.getAdapter().getCount() - lv.getLastVisiblePosition() - 1) * lastChild.getHeight() + lastChild.getBottom() - lv.getBottom(); 47 | } 48 | } else if (view instanceof RecyclerView && ((RecyclerView) view).getChildCount() > 0) { 49 | RecyclerView rv = ((RecyclerView) view); 50 | RecyclerView.LayoutManager lm = rv.getLayoutManager(); 51 | if (rv.getAdapter() == null) return 0; 52 | if (isSlidingUp) { 53 | View firstChild = rv.getChildAt(0); 54 | // Approximate the scroll position based on the top child and the first visible item 55 | return rv.getChildLayoutPosition(firstChild) * lm.getDecoratedMeasuredHeight(firstChild) - lm.getDecoratedTop(firstChild); 56 | } else { 57 | View lastChild = rv.getChildAt(rv.getChildCount() - 1); 58 | // Approximate the scroll position based on the bottom child and the last visible item 59 | return (rv.getAdapter().getItemCount() - 1) * lm.getDecoratedMeasuredHeight(lastChild) + lm.getDecoratedBottom(lastChild) - rv.getBottom(); 60 | } 61 | } else { 62 | return 0; 63 | } 64 | } 65 | } 66 | -------------------------------------------------------------------------------- /SlideNestedPanel/src/main/java/com/snail/slidenested/SlideNestedPanelLayout.java: -------------------------------------------------------------------------------- 1 | package com.snail.slidenested; 2 | 3 | import android.content.Context; 4 | import android.content.res.TypedArray; 5 | import android.graphics.Canvas; 6 | import android.graphics.Paint; 7 | import android.graphics.Rect; 8 | import android.support.v4.view.MotionEventCompat; 9 | import android.support.v4.view.ViewCompat; 10 | import android.util.AttributeSet; 11 | import android.view.MotionEvent; 12 | import android.view.View; 13 | import android.view.ViewGroup; 14 | import android.view.animation.AnimationUtils; 15 | import android.view.animation.Interpolator; 16 | import com.snail.slidenestedpanel.R; 17 | 18 | /** 19 | * author：created by Snail.江 20 | * time: 2018/12/20 11:13 21 | * email：409962004@qq.com 22 | * TODO: 仿美团订单，嵌套滑动拖拽控件 23 | */ 24 | public class SlideNestedPanelLayout extends ViewGroup { 25 | 26 | 27 | //默认面板状态 28 | private static final PanelState DEFAULT_STATE = PanelState.COLLAPSED; 29 | //最少滑动速度 30 | private static final int DEFAULT_FLING_VELOCITY = 400; 31 | //默认渐变色 32 | private static final int DEFAULT_FADE_COLOR = 0x99000000; 33 | //默认覆盖标识 34 | private static final boolean DEFAULT_OVERLAY_FLAG = false; 35 | //默认裁剪标识 36 | private static final boolean DEFAULT_CLIP_FLAG = true; 37 | //默认基准点 38 | private static final float DEFAULT_ANCHOR_POINT = 1.0f; 39 | //默认面板高度 40 | private static final int DEFAULT_PANEL_HEIGHT = 68; 41 | //默认视觉差比例 42 | private static final int DEFAULT_PARALLAX_OFFSET = 0; 43 | 44 | 45 | //面板高度 46 | private int mPanelHeight; 47 | 48 | 49 | //视觉差比例 50 | private int mParallaxOffset; 51 | 52 | 53 | //最少滑动速度因子 54 | private int mFlingVelocity; 55 | 56 | 57 | //覆盖渐变颜色 58 | private int mFadeColor; 59 | 60 | 61 | //嵌套滑动view resId 62 | private int mScrollViewResId; 63 | 64 | 65 | //覆盖内容标识 66 | private boolean mOverlayFlag; 67 | 68 | 69 | //裁剪标识 70 | private boolean mClipPanelFlag; 71 | 72 | 73 | //面板停止基准点 74 | private float mAnchorPoint; 75 | 76 | 77 | //状态 78 | private PanelState mPanelState = DEFAULT_STATE; 79 | 80 | 81 | //拖拽助手helper 82 | private ViewDragHelper mDragHelper = null; 83 | 84 | 85 | //是否依附到窗口 86 | private boolean isAttachedToWindow = true; 87 | 88 | 89 | //锁定面板，不可滑动标识 90 | private boolean isUnableToDrag; 91 | 92 | 93 | //主View 94 | private View mMainView; 95 | 96 | 97 | //面板内拖拽view 98 | private View mDragView; 99 | 100 | 101 | //面板内Scroll View 102 | private View mScrollView; 103 | 104 | 105 | //滑动辅助 106 | private ScrollableViewHelper mScrollableViewHelper = new ScrollableViewHelper(); 107 | 108 | 109 | //面板距离展开的位置，范围0-anchorPoint(0为折叠，anchorPoint为展开基准点) 110 | private float mSlideOffset; 111 | 112 | 113 | //记录下面板已滑动的范围 114 | private int mSlideRange; 115 | 116 | 117 | //是否自己处理事件 118 | private boolean isMyHandleTouch = false; 119 | 120 | 121 | //是否到顶(-1不确定、0底部、1顶部) 122 | private short isOnTopFlag = -1; 123 | 124 | 125 | //绘制区域 126 | private final Rect mTmpRect = new Rect(); 127 | 128 | 129 | //当Main滑动时用来画渐变的画笔 130 | private final Paint mCoveredFadePaint = new Paint(); 131 | 132 | 133 | //状态回调 134 | private StateCallback stateCallback; 135 | 136 | 137 | //标记触摸位置 138 | private float mPrevMotionX; 139 | private float mPrevMotionY; 140 | private float mInitialMotionX; 141 | private float mInitialMotionY; 142 | 143 | 144 | public SlideNestedPanelLayout(Context context) { 145 | this(context, null); 146 | } 147 | 148 | public SlideNestedPanelLayout(Context context, AttributeSet attrs) { 149 | this(context, attrs, 0); 150 | } 151 | 152 | public SlideNestedPanelLayout(Context context, AttributeSet attrs, int defStyleAttr) { 153 | super(context, attrs, defStyleAttr); 154 | 155 | //定义拖拽的插值器 156 | //获取自定义属性 157 | Interpolator scrollerInterpolator = null; 158 | if (attrs != null) { 159 | TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.SlideNestedPanelLayout); 160 | if (ta != null) { 161 | mPanelHeight = ta.getDimensionPixelSize(R.styleable.SlideNestedPanelLayout_panelHeight, -1); 162 | mParallaxOffset = ta.getDimensionPixelSize(R.styleable.SlideNestedPanelLayout_parallaxOffset, -1); 163 | mFlingVelocity = ta.getInt(R.styleable.SlideNestedPanelLayout_flingVelocity, DEFAULT_FLING_VELOCITY); 164 | mFadeColor = ta.getColor(R.styleable.SlideNestedPanelLayout_fadeColor, DEFAULT_FADE_COLOR); 165 | mScrollViewResId = ta.getResourceId(R.styleable.SlideNestedPanelLayout_scrollView, -1); 166 | mOverlayFlag = ta.getBoolean(R.styleable.SlideNestedPanelLayout_overlay, DEFAULT_OVERLAY_FLAG); 167 | mClipPanelFlag = ta.getBoolean(R.styleable.SlideNestedPanelLayout_clipPanel, DEFAULT_CLIP_FLAG); 168 | mAnchorPoint = ta.getFloat(R.styleable.SlideNestedPanelLayout_anchorPoint, DEFAULT_ANCHOR_POINT); 169 | mPanelState = PanelState.values()[ta.getInt(R.styleable.SlideNestedPanelLayout_initialState, DEFAULT_STATE.ordinal())]; 170 | 171 | int interpolatorResId = ta.getResourceId(R.styleable.SlideNestedPanelLayout_interpolator, -1); 172 | if (interpolatorResId != -1) { 173 | scrollerInterpolator = AnimationUtils.loadInterpolator(context, interpolatorResId); 174 | } 175 | ta.recycle(); 176 | } 177 | } 178 | 179 | //根据密度算默值 180 | final float density = context.getResources().getDisplayMetrics().density; 181 | if (mPanelHeight == -1) 182 | mPanelHeight = (int) (DEFAULT_PANEL_HEIGHT * density + 0.5f); 183 | 184 | if (mParallaxOffset == -1) 185 | mParallaxOffset = (int) (DEFAULT_PARALLAX_OFFSET * density); 186 | 187 | //不要执行onDraw 188 | setWillNotDraw(false); 189 | 190 | mDragHelper = ViewDragHelper.create(this, 1.0f, scrollerInterpolator, new DragHelperCallback()); 191 | mDragHelper.setMinVelocity(mFlingVelocity * density); 192 | } 193 | 194 | @Override 195 | protected void onAttachedToWindow() { 196 | super.onAttachedToWindow(); 197 | isAttachedToWindow = true; 198 | } 199 | 200 | @Override 201 | protected void onDetachedFromWindow() { 202 | super.onDetachedFromWindow(); 203 | isAttachedToWindow = false; 204 | } 205 | 206 | @Override 207 | protected ViewGroup.LayoutParams generateDefaultLayoutParams() { 208 | return new PanelLayoutParams(); 209 | } 210 | 211 | @Override 212 | protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { 213 | return p instanceof MarginLayoutParams 214 | ? new PanelLayoutParams((MarginLayoutParams) p) 215 | : new PanelLayoutParams(p); 216 | } 217 | 218 | @Override 219 | protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { 220 | return p instanceof PanelLayoutParams && super.checkLayoutParams(p); 221 | } 222 | 223 | @Override 224 | public ViewGroup.LayoutParams generateLayoutParams(AttributeSet attrs) { 225 | return new PanelLayoutParams(getContext(), attrs); 226 | } 227 | 228 | @Override 229 | protected void onFinishInflate() { 230 | super.onFinishInflate(); 231 | if (mScrollViewResId != -1) 232 | mScrollView = findViewById(mScrollViewResId); 233 | } 234 | 235 | @Override 236 | protected void onLayout(boolean changed, int l, int t, int r, int b) { 237 | final int paddingLeft = getPaddingLeft(); 238 | final int paddingTop = getPaddingTop(); 239 | final int childCount = getChildCount(); 240 | 241 | if (isAttachedToWindow) { 242 | switch (mPanelState) { 243 | case EXPANDED: 244 | mSlideOffset = mAnchorPoint; 245 | break; 246 | 247 | case ANCHORED: 248 | mSlideOffset = mAnchorPoint; 249 | break; 250 | 251 | default: 252 | mSlideOffset = 0.f; 253 | break; 254 | } 255 | } 256 | 257 | for (int i = 0; i < childCount; i++) { 258 | final View child = getChildAt(i); 259 | final PanelLayoutParams params = (PanelLayoutParams) child.getLayoutParams(); 260 | 261 | if (child.getVisibility() == GONE && (i == 0 || isAttachedToWindow)) 262 | continue; 263 | 264 | final int childHeight = child.getMeasuredHeight(); 265 | int childTop = paddingTop; 266 | 267 | if (child == mDragView) 268 | childTop = computePanelToPosition(mSlideOffset); 269 | 270 | final int childBottom = childTop + childHeight; 271 | final int childLeft = paddingLeft + params.leftMargin; 272 | final int childRight = childLeft + child.getMeasuredWidth(); 273 | child.layout(childLeft,childTop,childRight,childBottom); 274 | } 275 | 276 | applyParallaxForCurrentSlideOffset(); 277 | isAttachedToWindow = false; 278 | } 279 | 280 | @Override 281 | protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 282 | final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 283 | final int widthSize = MeasureSpec.getSize(widthMeasureSpec); 284 | final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 285 | final int heightSize = MeasureSpec.getSize(heightMeasureSpec); 286 | 287 | //宽高必须占满 288 | if (widthMode != MeasureSpec.EXACTLY && widthMode != MeasureSpec.AT_MOST) 289 | throw new IllegalArgumentException("Width 必须填满或者指定值"); 290 | else if (heightMode != MeasureSpec.EXACTLY && heightMode != MeasureSpec.AT_MOST) 291 | throw new IllegalArgumentException("Height 必须填或者指定值"); 292 | 293 | final int childCount = getChildCount(); 294 | 295 | if (childCount != 2) 296 | throw new IllegalArgumentException("SlideNestedPanelLayout必须有2给子view"); 297 | 298 | mMainView = getChildAt(0); 299 | mDragView = getChildAt(1); 300 | 301 | int layoutWidth = widthSize - getPaddingLeft() - getPaddingRight(); 302 | int layoutHeight = heightSize - getPaddingTop() - getPaddingBottom(); 303 | 304 | //第一步：首先测量子view的宽高 305 | for (int i = 0; i < childCount; i++) { 306 | final View child = getChildAt(i); 307 | final PanelLayoutParams params = (PanelLayoutParams) child.getLayoutParams(); 308 | 309 | if (child.getVisibility() == GONE && i == 0) 310 | continue; 311 | 312 | int width = layoutWidth; 313 | int height = layoutHeight; 314 | 315 | 316 | //如果是主view，要记录需要overlay的高度 317 | if (child == mMainView) { 318 | if (!mOverlayFlag) 319 | height -= mPanelHeight; 320 | width -= params.leftMargin + params.rightMargin; 321 | } else if (child == mDragView) { 322 | height -= params.topMargin; 323 | } 324 | 325 | //判断width应该使用的Mode 326 | int childWidthSpec; 327 | if (params.width == LayoutParams.WRAP_CONTENT) { 328 | childWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.AT_MOST); 329 | } else if (params.width == LayoutParams.MATCH_PARENT) { 330 | childWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 331 | } else { 332 | childWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 333 | } 334 | 335 | //判断height应该使用的Mode 336 | int childHeightSpec; 337 | if (params.height == LayoutParams.WRAP_CONTENT) { 338 | childHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.AT_MOST); 339 | } else { 340 | //根据权重修正高度 341 | if (params.weight > 0 && params.weight < 1) 342 | height = (int) (height * params.weight); 343 | else if (params.height != LayoutParams.MATCH_PARENT) 344 | height = params.height; 345 | childHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 346 | } 347 | 348 | child.measure(childWidthSpec, childHeightSpec); 349 | 350 | if (child == mDragView) 351 | mSlideRange = mDragView.getMeasuredHeight() - mPanelHeight; 352 | } 353 | 354 | setMeasuredDimension(widthSize, heightSize); 355 | } 356 | 357 | @Override 358 | public boolean onTouchEvent(MotionEvent event) { 359 | if (!isEnabled()) 360 | return super.onTouchEvent(event); 361 | try { 362 | mDragHelper.processTouchEvent(event); 363 | return true; 364 | } catch (Exception e) { 365 | e.printStackTrace(); 366 | return false; 367 | } 368 | } 369 | 370 | @Override 371 | public boolean dispatchTouchEvent(MotionEvent ev) { 372 | final int action = MotionEventCompat.getActionMasked(ev); 373 | //点击外部渐变层折叠收缩 374 | //松开，非折叠状态，且不在拖拽，点击落在dragView 375 | if (ev.getAction() == MotionEvent.ACTION_UP 376 | && !mDragHelper.isDragging() 377 | && mPanelState != PanelState.COLLAPSED 378 | && isViewUnder(mDragView, (int) ev.getX(), (int) ev.getY())) { 379 | mScrollView.scrollTo(0,0); 380 | mDragHelper.smoothSlideViewTo(mDragView,0,computePanelToPosition(0f)); 381 | ViewCompat.postInvalidateOnAnimation(this); 382 | 383 | //点击渐变收缩后，把拖拽标识恢复 384 | setEnabled(true); 385 | return true; 386 | } 387 | 388 | final float x = ev.getX(); 389 | final float y = ev.getY(); 390 | 391 | switch (action) { 392 | case MotionEvent.ACTION_DOWN:{ 393 | mPrevMotionX = x; 394 | mPrevMotionY = y; 395 | } 396 | break; 397 | 398 | case MotionEvent.ACTION_MOVE:{ 399 | float dx = x - mPrevMotionX; 400 | float dy = y - mPrevMotionY; 401 | mPrevMotionX = x; 402 | mPrevMotionY = y; 403 | 404 | //横向滑动就不分发了 405 | if (Math.abs(dx) > Math.abs(dy)) { 406 | return true; 407 | } 408 | 409 | //滑动向上、向下 410 | if (dy > 0) { //收缩 411 | 412 | if (mScrollableViewHelper.getScrollableViewScrollPosition(mScrollView, true) > 0) { 413 | isMyHandleTouch = true; 414 | return super.dispatchTouchEvent(ev); 415 | } 416 | 417 | //之前子view处理了事件 418 | //我们就需要重新组合一下让面板得到一个合理的点击事件 419 | if (isMyHandleTouch) { 420 | MotionEvent up = MotionEvent.obtain(ev); 421 | up.setAction(MotionEvent.ACTION_CANCEL); 422 | super.dispatchTouchEvent(up); 423 | up.recycle(); 424 | ev.setAction(MotionEvent.ACTION_DOWN); 425 | } 426 | 427 | isMyHandleTouch = false; 428 | return this.onTouchEvent(ev); 429 | } else { //展开 430 | 431 | //scrollY=0表示没滑动过，canScroll(1)表示可scroll up 432 | //逻辑或的意义：拖拽到顶后，要不要禁用外部拖拽 433 | if (isOnTopFlag == 1) { 434 | int offset = mDragView.getScrollY(); 435 | boolean scroll = mScrollableViewHelper.getScrollableViewScrollPosition(mScrollView, true) > 0; 436 | setEnabled(offset == 0 || scroll); 437 | mDragHelper.abort(); 438 | return super.dispatchTouchEvent(ev); 439 | } 440 | 441 | //面板是否全部展开 442 | if (mSlideOffset < mAnchorPoint) { 443 | isMyHandleTouch = false; 444 | return this.onTouchEvent(ev); 445 | } 446 | 447 | if (!isMyHandleTouch && mDragHelper.isDragging()) { 448 | mDragHelper.cancel(); 449 | ev.setAction(MotionEvent.ACTION_DOWN); 450 | } 451 | 452 | isMyHandleTouch = true; 453 | return super.dispatchTouchEvent(ev); 454 | } 455 | } 456 | 457 | case MotionEvent.ACTION_UP:{ 458 | //如果内嵌视图正在处理触摸，会接收到一个up事件、 459 | //我们想要清楚之前所有的拖拽状态，这样我们就不会意外拦截一个触摸事件 460 | if (isMyHandleTouch) { 461 | mDragHelper.setDragState(ViewDragHelper.STATE_IDLE); 462 | } 463 | } 464 | break; 465 | } 466 | 467 | return super.dispatchTouchEvent(ev); 468 | } 469 | 470 | @Override 471 | public boolean onInterceptTouchEvent(MotionEvent ev) { 472 | //如果scrollView处理事件，则不要拦截 473 | if (isMyHandleTouch) { 474 | mDragHelper.abort(); 475 | return false; 476 | } 477 | 478 | int action = MotionEventCompat.getActionMasked(ev); 479 | float x = ev.getX(); 480 | float y = ev.getY(); 481 | float adx = Math.abs(x - mInitialMotionX); 482 | float ady = Math.abs(y - mInitialMotionY); 483 | int dragSlop = mDragHelper.getTouchSlop(); 484 | 485 | switch (action) { 486 | case MotionEvent.ACTION_DOWN:{ 487 | isUnableToDrag = false; 488 | mInitialMotionX = x; 489 | mInitialMotionY = y; 490 | if (isViewUnder(mDragView, (int) x, (int) y)) { 491 | mDragHelper.cancel(); 492 | isUnableToDrag = true; 493 | return false; 494 | } 495 | } 496 | break; 497 | 498 | case MotionEvent.ACTION_MOVE:{ 499 | if (ady > dragSlop && adx > ady) { 500 | mDragHelper.cancel(); 501 | isUnableToDrag = true; 502 | return false; 503 | } 504 | } 505 | break; 506 | 507 | case MotionEvent.ACTION_CANCEL: 508 | case MotionEvent.ACTION_UP:{ 509 | //如果抬手释放后drawView还在拖拽状态，需要调用processTouchEvent 510 | if (mDragHelper.isDragging()) { 511 | mDragHelper.processTouchEvent(ev); 512 | return true; 513 | } 514 | } 515 | break; 516 | } 517 | return mDragHelper.shouldInterceptTouchEvent(ev); 518 | } 519 | 520 | @Override 521 | protected boolean drawChild(Canvas canvas, View child, long drawingTime) { 522 | boolean result; 523 | final int save = canvas.save(); 524 | //mainView的遮盖渐变层 525 | if (mDragView != null && mDragView != child) { 526 | canvas.getClipBounds(mTmpRect); 527 | if (!mOverlayFlag) { 528 | mTmpRect.bottom = Math.min(mTmpRect.bottom, mDragView.getTop()); 529 | } 530 | if (mClipPanelFlag) { 531 | canvas.clipRect(mTmpRect); 532 | } 533 | result = super.drawChild(canvas, child, drawingTime); 534 | if (mFadeColor != 0 && mSlideOffset > 0) { 535 | final int baseAlpha = (mFadeColor & 0xff000000) >>> 24; 536 | final int imag = (int) (baseAlpha * mSlideOffset); 537 | final int color = imag << 24 | (mFadeColor & 0xffffff); 538 | mCoveredFadePaint.setColor(color); 539 | canvas.drawRect(mTmpRect, mCoveredFadePaint); 540 | } 541 | } else { 542 | result = super.drawChild(canvas, child, drawingTime); 543 | } 544 | 545 | //没有合适的回调方法，只能另辟蹊径了 546 | //在这里判断dragView有没有到顶，然后把事件给内嵌view 547 | final int targetY = computePanelToPosition(mAnchorPoint); 548 | final int originalY = computePanelToPosition(0f); 549 | if (mDragView.getTop() == targetY) { 550 | //避免多次回调 551 | if (isOnTopFlag != 1 && stateCallback != null) { 552 | stateCallback.onExpandedState(); 553 | } 554 | isOnTopFlag = 1; 555 | }else if (mDragView.getTop() == originalY){ 556 | if (isOnTopFlag == -1 && stateCallback != null) { 557 | stateCallback.onCollapsedState(); 558 | } 559 | isOnTopFlag = 0; 560 | }else { 561 | isOnTopFlag = -1; 562 | } 563 | 564 | canvas.restoreToCount(save); 565 | return result; 566 | } 567 | 568 | @Override 569 | public void computeScroll() { 570 | if (mDragHelper != null && mDragHelper.continueSettling(true)) { 571 | if (!isEnabled()) { 572 | mDragHelper.abort(); 573 | return; 574 | } 575 | ViewCompat.postInvalidateOnAnimation(this); 576 | } 577 | } 578 | 579 | 580 | /**坐标是否落在target view*/ 581 | private boolean isViewUnder(View view,int x,int y){ 582 | if (view == null) 583 | return true; 584 | int[] viewLocation = new int[2]; 585 | view.getLocationOnScreen(viewLocation); 586 | int[] parentLocation = new int[2]; 587 | this.getLocationOnScreen(parentLocation); 588 | int screenX = parentLocation[0] + x; 589 | int screenY = parentLocation[1] + y; 590 | return screenX < viewLocation[0] || screenX >= viewLocation[0] + view.getWidth() || 591 | screenY < viewLocation[1] || screenY >= viewLocation[1] + view.getHeight(); 592 | } 593 | 594 | 595 | /** 596 | * 面板状态 597 | */ 598 | private void setPanelStateInternal(PanelState state) { 599 | if (mPanelState == state) 600 | return; 601 | mPanelState = state; 602 | } 603 | 604 | 605 | /** 606 | * 计算滑动的偏移量 607 | */ 608 | private int computePanelToPosition(float slideOffset) { 609 | int slidePixelOffset = (int) (slideOffset * mSlideRange); 610 | return getMeasuredHeight() - getPaddingBottom() - mPanelHeight - slidePixelOffset; 611 | } 612 | 613 | 614 | /**更新视觉差位置*/ 615 | private void applyParallaxForCurrentSlideOffset(){ 616 | if (mParallaxOffset > 0) { 617 | int offset = -(int)(mParallaxOffset * Math.max(mSlideOffset,0)); 618 | mMainView.setTranslationY(offset); 619 | } 620 | } 621 | 622 | 623 | /** 624 | * 拖拽状态更新以及位置的更新 625 | * */ 626 | private void onPanelDragged(int newTop) { 627 | setPanelStateInternal(PanelState.DRAGGING); 628 | //重新计算距离顶部偏移 629 | mSlideOffset = computeSlideOffset(newTop); 630 | //更新视觉差效果和分发事件 631 | applyParallaxForCurrentSlideOffset(); 632 | //如果偏移是向上，覆盖则无效，需要增加main的高度 633 | LayoutParams lp = mMainView.getLayoutParams(); 634 | int defaultHeight = getHeight() - getPaddingBottom() - getPaddingTop() - mPanelHeight; 635 | if (mSlideOffset <= 0 && !mOverlayFlag) { 636 | lp.height = (newTop - getPaddingBottom()); 637 | if (lp.height == defaultHeight) { 638 | lp.height = LayoutParams.MATCH_PARENT; 639 | } 640 | } else if (lp.height != LayoutParams.MATCH_PARENT && !mOverlayFlag) { 641 | lp.height = LayoutParams.MATCH_PARENT; 642 | } 643 | mMainView.requestLayout(); 644 | } 645 | 646 | 647 | /** 648 | * 计算滑动偏移量*/ 649 | private float computeSlideOffset(int topPosition) { 650 | final int topBoundCollapsed = computePanelToPosition(0f); 651 | return (float) (topBoundCollapsed - topPosition) / mSlideRange; 652 | } 653 | 654 | 655 | /**状态回调*/ 656 | public void setStateCallback(StateCallback callback){ 657 | this.stateCallback = callback; 658 | } 659 | 660 | 661 | /** 662 | * 拖拽回调 663 | */ 664 | private class DragHelperCallback extends ViewDragHelper.Callback { 665 | 666 | private boolean slideUp = false; 667 | 668 | @Override 669 | public boolean tryCaptureView(View child, int pointerId) { 670 | return !isUnableToDrag && child == mDragView; 671 | } 672 | 673 | @Override 674 | public void onViewDragStateChanged(int state) { 675 | if (mDragHelper != null && mDragHelper.getViewDragState() == ViewDragHelper.STATE_IDLE) { 676 | mSlideOffset = computeSlideOffset(mDragView.getTop()); 677 | applyParallaxForCurrentSlideOffset(); 678 | 679 | if (mSlideOffset == 1) { 680 | setPanelStateInternal(PanelState.EXPANDED); 681 | } else if (mSlideOffset == 0) { 682 | setPanelStateInternal(PanelState.COLLAPSED); 683 | } else { 684 | setPanelStateInternal(PanelState.ANCHORED); 685 | } 686 | } 687 | } 688 | 689 | @Override 690 | public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) { 691 | slideUp = dy > 0;//正为收缩，负为展开 692 | onPanelDragged(top); 693 | // invalidate(); 694 | } 695 | 696 | @Override 697 | public void onViewReleased(View releasedChild, float xvel, float yvel) { 698 | int target; 699 | if (!slideUp) { 700 | if (mSlideOffset >= mAnchorPoint / 6) { 701 | target = computePanelToPosition(mAnchorPoint); 702 | } else { 703 | target = computePanelToPosition(0f); 704 | } 705 | }else { 706 | if (mSlideOffset >= mAnchorPoint / 3) { 707 | target = computePanelToPosition(0f); 708 | } else { 709 | target = computePanelToPosition(mAnchorPoint); 710 | } 711 | } 712 | 713 | if (mDragHelper != null) { 714 | mDragHelper.settleCapturedViewAt(releasedChild.getLeft(), target); 715 | } 716 | 717 | // invalidate(); 718 | } 719 | 720 | @Override 721 | public int getViewVerticalDragRange(View child) { 722 | return mSlideRange; 723 | } 724 | 725 | @Override 726 | public int clampViewPositionVertical(View child, int top, int dy) { 727 | final int original = computePanelToPosition(0f); 728 | final int anchor = computePanelToPosition(mAnchorPoint); 729 | return Math.min(Math.max(top, anchor), original); 730 | } 731 | } 732 | } 733 | -------------------------------------------------------------------------------- /SlideNestedPanel/src/main/java/com/snail/slidenested/StateCallback.java: -------------------------------------------------------------------------------- 1 | package com.snail.slidenested; 2 | 3 | /** 4 | * author：created by Snail.江 5 | * time: 2019/1/14 12:05 6 | * email：409962004@qq.com 7 | * TODO: 状态回调 8 | */ 9 | public interface StateCallback { 10 | 11 | void onExpandedState(); 12 | 13 | void onCollapsedState(); 14 | } 15 | -------------------------------------------------------------------------------- /SlideNestedPanel/src/main/java/com/snail/slidenested/ViewDragHelper.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2013 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | 18 | package com.snail.slidenested; 19 | 20 | import android.content.Context; 21 | import android.support.v4.view.MotionEventCompat; 22 | import android.support.v4.view.VelocityTrackerCompat; 23 | import android.support.v4.view.ViewCompat; 24 | import android.support.v4.widget.ScrollerCompat; 25 | import android.view.MotionEvent; 26 | import android.view.VelocityTracker; 27 | import android.view.View; 28 | import android.view.ViewConfiguration; 29 | import android.view.ViewGroup; 30 | import android.view.animation.Interpolator; 31 | 32 | import java.util.Arrays; 33 | 34 | /** 35 | * ViewDragHelper is a utility class for writing custom ViewGroups. It offers a number 36 | * of useful operations and state tracking for allowing a user to drag and reposition 37 | * views within their parent ViewGroup. 38 | */ 39 | public class ViewDragHelper { 40 | private static final String TAG = "ViewDragHelper"; 41 | 42 | /** 43 | * A null/invalid pointer ID. 44 | */ 45 | public static final int INVALID_POINTER = -1; 46 | 47 | /** 48 | * A view is not currently being dragged or animating as a result of a fling/snap. 49 | */ 50 | public static final int STATE_IDLE = 0; 51 | 52 | /** 53 | * A view is currently being dragged. The position is currently changing as a result 54 | * of user input or simulated user input. 55 | */ 56 | public static final int STATE_DRAGGING = 1; 57 | 58 | /** 59 | * A view is currently settling into place as a result of a fling or 60 | * predefined non-interactive motion. 61 | */ 62 | public static final int STATE_SETTLING = 2; 63 | 64 | /** 65 | * Edge flag indicating that the left edge should be affected. 66 | */ 67 | public static final int EDGE_LEFT = 1 << 0; 68 | 69 | /** 70 | * Edge flag indicating that the right edge should be affected. 71 | */ 72 | public static final int EDGE_RIGHT = 1 << 1; 73 | 74 | /** 75 | * Edge flag indicating that the top edge should be affected. 76 | */ 77 | public static final int EDGE_TOP = 1 << 2; 78 | 79 | /** 80 | * Edge flag indicating that the bottom edge should be affected. 81 | */ 82 | public static final int EDGE_BOTTOM = 1 << 3; 83 | 84 | /** 85 | * Edge flag set indicating all edges should be affected. 86 | */ 87 | public static final int EDGE_ALL = EDGE_LEFT | EDGE_TOP | EDGE_RIGHT | EDGE_BOTTOM; 88 | 89 | /** 90 | * Indicates that a check should occur along the horizontal axis 91 | */ 92 | public static final int DIRECTION_HORIZONTAL = 1 << 0; 93 | 94 | /** 95 | * Indicates that a check should occur along the vertical axis 96 | */ 97 | public static final int DIRECTION_VERTICAL = 1 << 1; 98 | 99 | /** 100 | * Indicates that a check should occur along all axes 101 | */ 102 | public static final int DIRECTION_ALL = DIRECTION_HORIZONTAL | DIRECTION_VERTICAL; 103 | 104 | private static final int EDGE_SIZE = 20; // dp 105 | 106 | private static final int BASE_SETTLE_DURATION = 256; // ms 107 | private static final int MAX_SETTLE_DURATION = 600; // ms 108 | 109 | // Current drag state; idle, dragging or settling 110 | private int mDragState; 111 | 112 | // Distance to travel before a drag may begin 113 | private int mTouchSlop; 114 | 115 | // Last known position/pointer tracking 116 | private int mActivePointerId = INVALID_POINTER; 117 | private float[] mInitialMotionX; 118 | private float[] mInitialMotionY; 119 | private float[] mLastMotionX; 120 | private float[] mLastMotionY; 121 | private int[] mInitialEdgesTouched; 122 | private int[] mEdgeDragsInProgress; 123 | private int[] mEdgeDragsLocked; 124 | private int mPointersDown; 125 | 126 | private VelocityTracker mVelocityTracker; 127 | private float mMaxVelocity; 128 | private float mMinVelocity; 129 | 130 | private int mEdgeSize; 131 | private int mTrackingEdges; 132 | 133 | private ScrollerCompat mScroller; 134 | 135 | private final Callback mCallback; 136 | 137 | private View mCapturedView; 138 | private boolean mReleaseInProgress; 139 | 140 | private final ViewGroup mParentView; 141 | 142 | /** 143 | * A Callback is used as a communication channel with the ViewDragHelper back to the 144 | * parent view using it. on*methods are invoked on siginficant events and several 145 | * accessor methods are expected to provide the ViewDragHelper with more information 146 | * about the state of the parent view upon request. The callback also makes decisions 147 | * governing the range and draggability of child views. 148 | */ 149 | public static abstract class Callback { 150 | /** 151 | * Called when the drag state changes. See the STATE_* constants 152 | * for more information. 153 | * 154 | * @param state The new drag state 155 | * 156 | * @see #STATE_IDLE 157 | * @see #STATE_DRAGGING 158 | * @see #STATE_SETTLING 159 | */ 160 | public void onViewDragStateChanged(int state) {} 161 | 162 | /** 163 | * Called when the captured view's position changes as the result of a drag or settle. 164 | * 165 | * @param changedView View whose position changed 166 | * @param left New X coordinate of the left edge of the view 167 | * @param top New Y coordinate of the top edge of the view 168 | * @param dx Change in X position from the last call 169 | * @param dy Change in Y position from the last call 170 | */ 171 | public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) {} 172 | 173 | /** 174 | * Called when a child view is captured for dragging or settling. The ID of the pointer 175 | * currently dragging the captured view is supplied. If activePointerId is 176 | * identified as {@link #INVALID_POINTER} the capture is programmatic instead of 177 | * pointer-initiated. 178 | * 179 | * @param capturedChild Child view that was captured 180 | * @param activePointerId Pointer id tracking the child capture 181 | */ 182 | public void onViewCaptured(View capturedChild, int activePointerId) {} 183 | 184 | /** 185 | * Called when the child view is no longer being actively dragged. 186 | * The fling velocity is also supplied, if relevant. The velocity values may 187 | * be clamped to system minimums or maximums. 188 | * 189 | *

Calling code may decide to fling or otherwise release the view to let it 190 | * settle into place. It should do so using {@link #settleCapturedViewAt(int, int)} 191 | * or {@link #flingCapturedView(int, int, int, int)}. If the Callback invokes 192 | * one of these methods, the ViewDragHelper will enter {@link #STATE_SETTLING} 193 | * and the view capture will not fully end until it comes to a complete stop. 194 | * If neither of these methods is invoked before onViewReleased returns, 195 | * the view will stop in place and the ViewDragHelper will return to 196 | * {@link #STATE_IDLE}.

197 | * 198 | * @param releasedChild The captured child view now being released 199 | * @param xvel X velocity of the pointer as it left the screen in pixels per second. 200 | * @param yvel Y velocity of the pointer as it left the screen in pixels per second. 201 | */ 202 | public void onViewReleased(View releasedChild, float xvel, float yvel) {} 203 | 204 | /** 205 | * Called when one of the subscribed edges in the parent view has been touched 206 | * by the user while no child view is currently captured. 207 | * 208 | * @param edgeFlags A combination of edge flags describing the edge(s) currently touched 209 | * @param pointerId ID of the pointer touching the described edge(s) 210 | * @see #EDGE_LEFT 211 | * @see #EDGE_TOP 212 | * @see #EDGE_RIGHT 213 | * @see #EDGE_BOTTOM 214 | */ 215 | public void onEdgeTouched(int edgeFlags, int pointerId) {} 216 | 217 | /** 218 | * Called when the given edge may become locked. This can happen if an edge drag 219 | * was preliminarily rejected before beginning, but after {@link #onEdgeTouched(int, int)} 220 | * was called. This method should return true to lock this edge or false to leave it 221 | * unlocked. The default behavior is to leave edges unlocked. 222 | * 223 | * @param edgeFlags A combination of edge flags describing the edge(s) locked 224 | * @return true to lock the edge, false to leave it unlocked 225 | */ 226 | public boolean onEdgeLock(int edgeFlags) { 227 | return false; 228 | } 229 | 230 | /** 231 | * Called when the user has started a deliberate drag away from one 232 | * of the subscribed edges in the parent view while no child view is currently captured. 233 | * 234 | * @param edgeFlags A combination of edge flags describing the edge(s) dragged 235 | * @param pointerId ID of the pointer touching the described edge(s) 236 | * @see #EDGE_LEFT 237 | * @see #EDGE_TOP 238 | * @see #EDGE_RIGHT 239 | * @see #EDGE_BOTTOM 240 | */ 241 | public void onEdgeDragStarted(int edgeFlags, int pointerId) {} 242 | 243 | /** 244 | * Called to determine the Z-order of child views. 245 | * 246 | * @param index the ordered position to query for 247 | * @return index of the view that should be ordered at position index 248 | */ 249 | public int getOrderedChildIndex(int index) { 250 | return index; 251 | } 252 | 253 | /** 254 | * Return the magnitude of a draggable child view's horizontal range of motion in pixels. 255 | * This method should return 0 for views that cannot move horizontally. 256 | * 257 | * @param child Child view to check 258 | * @return range of horizontal motion in pixels 259 | */ 260 | public int getViewHorizontalDragRange(View child) { 261 | return 0; 262 | } 263 | 264 | /** 265 | * Return the magnitude of a draggable child view's vertical range of motion in pixels. 266 | * This method should return 0 for views that cannot move vertically. 267 | * 268 | * @param child Child view to check 269 | * @return range of vertical motion in pixels 270 | */ 271 | public int getViewVerticalDragRange(View child) { 272 | return 0; 273 | } 274 | 275 | /** 276 | * Called when the user's input indicates that they want to capture the given child view 277 | * with the pointer indicated by pointerId. The callback should return true if the user 278 | * is permitted to drag the given view with the indicated pointer. 279 | * 280 | *

ViewDragHelper may call this method multiple times for the same view even if 281 | * the view is already captured; this indicates that a new pointer is trying to take 282 | * control of the view.

283 | * 284 | *

If this method returns true, a call to {@link #onViewCaptured(View, int)} 285 | * will follow if the capture is successful.

286 | * 287 | * @param child Child the user is attempting to capture 288 | * @param pointerId ID of the pointer attempting the capture 289 | * @return true if capture should be allowed, false otherwise 290 | */ 291 | public abstract boolean tryCaptureView(View child, int pointerId); 292 | 293 | /** 294 | * Restrict the motion of the dragged child view along the horizontal axis. 295 | * The default implementation does not allow horizontal motion; the extending 296 | * class must override this method and provide the desired clamping. 297 | * 298 | * 299 | * @param child Child view being dragged 300 | * @param left Attempted motion along the X axis 301 | * @param dx Proposed change in position for left 302 | * @return The new clamped position for left 303 | */ 304 | public int clampViewPositionHorizontal(View child, int left, int dx) { 305 | return 0; 306 | } 307 | 308 | /** 309 | * Restrict the motion of the dragged child view along the vertical axis. 310 | * The default implementation does not allow vertical motion; the extending 311 | * class must override this method and provide the desired clamping. 312 | * 313 | * 314 | * @param child Child view being dragged 315 | * @param top Attempted motion along the Y axis 316 | * @param dy Proposed change in position for top 317 | * @return The new clamped position for top 318 | */ 319 | public int clampViewPositionVertical(View child, int top, int dy) { 320 | return 0; 321 | } 322 | } 323 | 324 | /** 325 | * Interpolator defining the animation curve for mScroller 326 | */ 327 | private static final Interpolator sInterpolator = new Interpolator() { 328 | public float getInterpolation(float t) { 329 | t -= 1.0f; 330 | return t * t * t * t * t + 1.0f; 331 | } 332 | }; 333 | 334 | private final Runnable mSetIdleRunnable = new Runnable() { 335 | public void run() { 336 | setDragState(STATE_IDLE); 337 | } 338 | }; 339 | 340 | /** 341 | * Factory method to create a new ViewDragHelper. 342 | * 343 | * @param forParent Parent view to monitor 344 | * @param cb Callback to provide information and receive events 345 | * @return a new ViewDragHelper instance 346 | */ 347 | public static ViewDragHelper create(ViewGroup forParent, Callback cb) { 348 | return new ViewDragHelper(forParent.getContext(), forParent, null, cb); 349 | } 350 | 351 | /** 352 | * Factory method to create a new ViewDragHelper with the specified interpolator. 353 | * 354 | * @param forParent Parent view to monitor 355 | * @param interpolator interpolator for scroller 356 | * @param cb Callback to provide information and receive events 357 | * @return a new ViewDragHelper instance 358 | */ 359 | public static ViewDragHelper create(ViewGroup forParent, Interpolator interpolator, Callback cb) { 360 | return new ViewDragHelper(forParent.getContext(), forParent, interpolator, cb); 361 | } 362 | 363 | /** 364 | * Factory method to create a new ViewDragHelper. 365 | * 366 | * @param forParent Parent view to monitor 367 | * @param sensitivity Multiplier for how sensitive the helper should be about detecting 368 | * the start of a drag. Larger values are more sensitive. 1.0f is normal. 369 | * @param cb Callback to provide information and receive events 370 | * @return a new ViewDragHelper instance 371 | */ 372 | public static ViewDragHelper create(ViewGroup forParent, float sensitivity, Callback cb) { 373 | final ViewDragHelper helper = create(forParent, cb); 374 | helper.mTouchSlop = (int) (helper.mTouchSlop * (1 / sensitivity)); 375 | return helper; 376 | } 377 | 378 | /** 379 | * Factory method to create a new ViewDragHelper with the specified interpolator. 380 | * 381 | * @param forParent Parent view to monitor 382 | * @param sensitivity Multiplier for how sensitive the helper should be about detecting 383 | * the start of a drag. Larger values are more sensitive. 1.0f is normal. 384 | * @param interpolator interpolator for scroller 385 | * @param cb Callback to provide information and receive events 386 | * @return a new ViewDragHelper instance 387 | */ 388 | public static ViewDragHelper create(ViewGroup forParent, float sensitivity, Interpolator interpolator, Callback cb) { 389 | final ViewDragHelper helper = create(forParent, interpolator, cb); 390 | helper.mTouchSlop = (int) (helper.mTouchSlop * (1 / sensitivity)); 391 | return helper; 392 | } 393 | 394 | /** 395 | * Apps should use ViewDragHelper.create() to get a new instance. 396 | * This will allow VDH to use internal compatibility implementations for different 397 | * platform versions. 398 | * If the interpolator is null, the default interpolator will be used. 399 | * 400 | * @param context Context to initialize config-dependent params from 401 | * @param forParent Parent view to monitor 402 | * @param interpolator interpolator for scroller 403 | */ 404 | private ViewDragHelper(Context context, ViewGroup forParent, Interpolator interpolator, Callback cb) { 405 | if (forParent == null) { 406 | throw new IllegalArgumentException("Parent view may not be null"); 407 | } 408 | if (cb == null) { 409 | throw new IllegalArgumentException("Callback may not be null"); 410 | } 411 | 412 | mParentView = forParent; 413 | mCallback = cb; 414 | 415 | final ViewConfiguration vc = ViewConfiguration.get(context); 416 | final float density = context.getResources().getDisplayMetrics().density; 417 | mEdgeSize = (int) (EDGE_SIZE * density + 0.5f); 418 | 419 | mTouchSlop = vc.getScaledTouchSlop(); 420 | mMaxVelocity = vc.getScaledMaximumFlingVelocity(); 421 | mMinVelocity = vc.getScaledMinimumFlingVelocity(); 422 | mScroller = ScrollerCompat.create(context, interpolator != null ? interpolator : sInterpolator); 423 | } 424 | 425 | /** 426 | * Set the minimum velocity that will be detected as having a magnitude greater than zero 427 | * in pixels per second. Callback methods accepting a velocity will be clamped appropriately. 428 | * 429 | * @param minVel Minimum velocity to detect 430 | */ 431 | public void setMinVelocity(float minVel) { 432 | mMinVelocity = minVel; 433 | } 434 | 435 | /** 436 | * Return the currently configured minimum velocity. Any flings with a magnitude less 437 | * than this value in pixels per second. Callback methods accepting a velocity will receive 438 | * zero as a velocity value if the real detected velocity was below this threshold. 439 | * 440 | * @return the minimum velocity that will be detected 441 | */ 442 | public float getMinVelocity() { 443 | return mMinVelocity; 444 | } 445 | 446 | /** 447 | * Retrieve the current drag state of this helper. This will return one of 448 | * {@link #STATE_IDLE}, {@link #STATE_DRAGGING} or {@link #STATE_SETTLING}. 449 | * @return The current drag state 450 | */ 451 | public int getViewDragState() { 452 | return mDragState; 453 | } 454 | 455 | /** 456 | * Enable edge tracking for the selected edges of the parent view. 457 | * The callback's {@link Callback#onEdgeTouched(int, int)} and 458 | * {@link Callback#onEdgeDragStarted(int, int)} methods will only be invoked 459 | * for edges for which edge tracking has been enabled. 460 | * 461 | * @param edgeFlags Combination of edge flags describing the edges to watch 462 | * @see #EDGE_LEFT 463 | * @see #EDGE_TOP 464 | * @see #EDGE_RIGHT 465 | * @see #EDGE_BOTTOM 466 | */ 467 | public void setEdgeTrackingEnabled(int edgeFlags) { 468 | mTrackingEdges = edgeFlags; 469 | } 470 | 471 | /** 472 | * Return the size of an edge. This is the range in pixels along the edges of this view 473 | * that will actively detect edge touches or drags if edge tracking is enabled. 474 | * 475 | * @return The size of an edge in pixels 476 | * @see #setEdgeTrackingEnabled(int) 477 | */ 478 | public int getEdgeSize() { 479 | return mEdgeSize; 480 | } 481 | 482 | /** 483 | * Capture a specific child view for dragging within the parent. The callback will be notified 484 | * but {@link Callback#tryCaptureView(View, int)} will not be asked permission to 485 | * capture this view. 486 | * 487 | * @param childView Child view to capture 488 | * @param activePointerId ID of the pointer that is dragging the captured child view 489 | */ 490 | public void captureChildView(View childView, int activePointerId) { 491 | if (childView.getParent() != mParentView) { 492 | throw new IllegalArgumentException("captureChildView: parameter must be a descendant " + 493 | "of the ViewDragHelper's tracked parent view (" + mParentView + ")"); 494 | } 495 | 496 | mCapturedView = childView; 497 | mActivePointerId = activePointerId; 498 | mCallback.onViewCaptured(childView, activePointerId); 499 | setDragState(STATE_DRAGGING); 500 | } 501 | 502 | /** 503 | * @return The currently captured view, or null if no view has been captured. 504 | */ 505 | public View getCapturedView() { 506 | return mCapturedView; 507 | } 508 | 509 | /** 510 | * @return The ID of the pointer currently dragging the captured view, 511 | * or {@link #INVALID_POINTER}. 512 | */ 513 | public int getActivePointerId() { 514 | return mActivePointerId; 515 | } 516 | 517 | /** 518 | * @return The minimum distance in pixels that the user must travel to initiate a drag 519 | */ 520 | public int getTouchSlop() { 521 | return mTouchSlop; 522 | } 523 | 524 | /** 525 | * The result of a call to this method is equivalent to 526 | * {@link #processTouchEvent(MotionEvent)} receiving an ACTION_CANCEL event. 527 | */ 528 | public void cancel() { 529 | mActivePointerId = INVALID_POINTER; 530 | clearMotionHistory(); 531 | 532 | if (mVelocityTracker != null) { 533 | mVelocityTracker.recycle(); 534 | mVelocityTracker = null; 535 | } 536 | } 537 | 538 | /** 539 | * {@link #cancel()}, but also abort all motion in progress and snap to the end of any 540 | * animation. 541 | */ 542 | public void abort() { 543 | cancel(); 544 | if (mDragState == STATE_SETTLING) { 545 | final int oldX = mScroller.getCurrX(); 546 | final int oldY = mScroller.getCurrY(); 547 | mScroller.abortAnimation(); 548 | final int newX = mScroller.getCurrX(); 549 | final int newY = mScroller.getCurrY(); 550 | mCallback.onViewPositionChanged(mCapturedView, newX, newY, newX - oldX, newY - oldY); 551 | } 552 | setDragState(STATE_IDLE); 553 | } 554 | 555 | /** 556 | * Animate the view child to the given (left, top) position. 557 | * If this method returns true, the caller should invoke {@link #continueSettling(boolean)} 558 | * on each subsequent frame to continue the motion until it returns false. If this method 559 | * returns false there is no further work to do to complete the movement. 560 | * 561 | *

This operation does not count as a capture event, though {@link #getCapturedView()} 562 | * will still report the sliding view while the slide is in progress.

563 | * 564 | * @param child Child view to capture and animate 565 | * @param finalLeft Final left position of child 566 | * @param finalTop Final top position of child 567 | * @return true if animation should continue through {@link #continueSettling(boolean)} calls 568 | */ 569 | public boolean smoothSlideViewTo(View child, int finalLeft, int finalTop) { 570 | mCapturedView = child; 571 | mActivePointerId = INVALID_POINTER; 572 | 573 | return forceSettleCapturedViewAt(finalLeft, finalTop, 0, 0); 574 | } 575 | 576 | /** 577 | * Settle the captured view at the given (left, top) position. 578 | * The appropriate velocity from prior motion will be taken into account. 579 | * If this method returns true, the caller should invoke {@link #continueSettling(boolean)} 580 | * on each subsequent frame to continue the motion until it returns false. If this method 581 | * returns false there is no further work to do to complete the movement. 582 | * 583 | * @param finalLeft Settled left edge position for the captured view 584 | * @param finalTop Settled top edge position for the captured view 585 | * @return true if animation should continue through {@link #continueSettling(boolean)} calls 586 | */ 587 | public boolean settleCapturedViewAt(int finalLeft, int finalTop) { 588 | if (!mReleaseInProgress) { 589 | throw new IllegalStateException("Cannot settleCapturedViewAt outside of a call to " + 590 | "Callback#onViewReleased"); 591 | } 592 | 593 | return forceSettleCapturedViewAt(finalLeft, finalTop, 594 | (int) VelocityTrackerCompat.getXVelocity(mVelocityTracker, mActivePointerId), 595 | (int) VelocityTrackerCompat.getYVelocity(mVelocityTracker, mActivePointerId)); 596 | } 597 | 598 | /** 599 | * Settle the captured view at the given (left, top) position. 600 | * 601 | * @param finalLeft Target left position for the captured view 602 | * @param finalTop Target top position for the captured view 603 | * @param xvel Horizontal velocity 604 | * @param yvel Vertical velocity 605 | * @return true if animation should continue through {@link #continueSettling(boolean)} calls 606 | */ 607 | private boolean forceSettleCapturedViewAt(int finalLeft, int finalTop, int xvel, int yvel) { 608 | final int startLeft = mCapturedView.getLeft(); 609 | final int startTop = mCapturedView.getTop(); 610 | final int dx = finalLeft - startLeft; 611 | final int dy = finalTop - startTop; 612 | 613 | if (dx == 0 && dy == 0) { 614 | // Nothing to do. Send callbacks, be done. 615 | mScroller.abortAnimation(); 616 | setDragState(STATE_IDLE); 617 | return false; 618 | } 619 | 620 | final int duration = computeSettleDuration(mCapturedView, dx, dy, xvel, yvel); 621 | mScroller.startScroll(startLeft, startTop, dx, dy, duration); 622 | 623 | setDragState(STATE_SETTLING); 624 | return true; 625 | } 626 | 627 | private int computeSettleDuration(View child, int dx, int dy, int xvel, int yvel) { 628 | xvel = clampMag(xvel, (int) mMinVelocity, (int) mMaxVelocity); 629 | yvel = clampMag(yvel, (int) mMinVelocity, (int) mMaxVelocity); 630 | final int absDx = Math.abs(dx); 631 | final int absDy = Math.abs(dy); 632 | final int absXVel = Math.abs(xvel); 633 | final int absYVel = Math.abs(yvel); 634 | final int addedVel = absXVel + absYVel; 635 | final int addedDistance = absDx + absDy; 636 | 637 | final float xweight = xvel != 0 ? (float) absXVel / addedVel : 638 | (float) absDx / addedDistance; 639 | final float yweight = yvel != 0 ? (float) absYVel / addedVel : 640 | (float) absDy / addedDistance; 641 | 642 | int xduration = computeAxisDuration(dx, xvel, mCallback.getViewHorizontalDragRange(child)); 643 | int yduration = computeAxisDuration(dy, yvel, mCallback.getViewVerticalDragRange(child)); 644 | 645 | return (int) (xduration * xweight + yduration * yweight); 646 | } 647 | 648 | private int computeAxisDuration(int delta, int velocity, int motionRange) { 649 | if (delta == 0) { 650 | return 0; 651 | } 652 | 653 | final int width = mParentView.getWidth(); 654 | final int halfWidth = width / 2; 655 | final float distanceRatio = Math.min(1f, (float) Math.abs(delta) / width); 656 | final float distance = halfWidth + halfWidth * 657 | distanceInfluenceForSnapDuration(distanceRatio); 658 | 659 | int duration; 660 | velocity = Math.abs(velocity); 661 | if (velocity > 0) { 662 | duration = 4 * Math.round(1000 * Math.abs(distance / velocity)); 663 | } else { 664 | final float range = (float) Math.abs(delta) / motionRange; 665 | duration = (int) ((range + 1) * BASE_SETTLE_DURATION); 666 | } 667 | return Math.min(duration, MAX_SETTLE_DURATION); 668 | } 669 | 670 | /** 671 | * Clamp the magnitude of value for absMin and absMax. 672 | * If the value is below the minimum, it will be clamped to zero. 673 | * If the value is above the maximum, it will be clamped to the maximum. 674 | * 675 | * @param value Value to clamp 676 | * @param absMin Absolute value of the minimum significant value to return 677 | * @param absMax Absolute value of the maximum value to return 678 | * @return The clamped value with the same sign as value 679 | */ 680 | private int clampMag(int value, int absMin, int absMax) { 681 | final int absValue = Math.abs(value); 682 | if (absValue < absMin) return 0; 683 | if (absValue > absMax) return value > 0 ? absMax : -absMax; 684 | return value; 685 | } 686 | 687 | /** 688 | * Clamp the magnitude of value for absMin and absMax. 689 | * If the value is below the minimum, it will be clamped to zero. 690 | * If the value is above the maximum, it will be clamped to the maximum. 691 | * 692 | * @param value Value to clamp 693 | * @param absMin Absolute value of the minimum significant value to return 694 | * @param absMax Absolute value of the maximum value to return 695 | * @return The clamped value with the same sign as value 696 | */ 697 | private float clampMag(float value, float absMin, float absMax) { 698 | final float absValue = Math.abs(value); 699 | if (absValue < absMin) return 0; 700 | if (absValue > absMax) return value > 0 ? absMax : -absMax; 701 | return value; 702 | } 703 | 704 | private float distanceInfluenceForSnapDuration(float f) { 705 | f -= 0.5f; // center the values about 0. 706 | f *= 0.3f * Math.PI / 2.0f; 707 | return (float) Math.sin(f); 708 | } 709 | 710 | /** 711 | * Settle the captured view based on standard free-moving fling behavior. 712 | * The caller should invoke {@link #continueSettling(boolean)} on each subsequent frame 713 | * to continue the motion until it returns false. 714 | * 715 | * @param minLeft Minimum X position for the view's left edge 716 | * @param minTop Minimum Y position for the view's top edge 717 | * @param maxLeft Maximum X position for the view's left edge 718 | * @param maxTop Maximum Y position for the view's top edge 719 | */ 720 | public void flingCapturedView(int minLeft, int minTop, int maxLeft, int maxTop) { 721 | if (!mReleaseInProgress) { 722 | throw new IllegalStateException("Cannot flingCapturedView outside of a call to " + 723 | "Callback#onViewReleased"); 724 | } 725 | 726 | mScroller.fling(mCapturedView.getLeft(), mCapturedView.getTop(), 727 | (int) VelocityTrackerCompat.getXVelocity(mVelocityTracker, mActivePointerId), 728 | (int) VelocityTrackerCompat.getYVelocity(mVelocityTracker, mActivePointerId), 729 | minLeft, maxLeft, minTop, maxTop); 730 | 731 | setDragState(STATE_SETTLING); 732 | } 733 | 734 | /** 735 | * Move the captured settling view by the appropriate amount for the current time. 736 | * If continueSettling returns true, the caller should call it again 737 | * on the next frame to continue. 738 | * 739 | * @param deferCallbacks true if state callbacks should be deferred via posted message. 740 | * Set this to true if you are calling this method from 741 | * {@link View#computeScroll()} or similar methods 742 | * invoked as part of layout or drawing. 743 | * @return true if settle is still in progress 744 | */ 745 | public boolean continueSettling(boolean deferCallbacks) { 746 | // Make sure, there is a captured view 747 | if (mCapturedView == null) { 748 | return false; 749 | } 750 | if (mDragState == STATE_SETTLING) { 751 | boolean keepGoing = mScroller.computeScrollOffset(); 752 | final int x = mScroller.getCurrX(); 753 | final int y = mScroller.getCurrY(); 754 | final int dx = x - mCapturedView.getLeft(); 755 | final int dy = y - mCapturedView.getTop(); 756 | 757 | if(!keepGoing && dy != 0) { //fix #525 758 | //Invalid drag state 759 | mCapturedView.setTop(0); 760 | return true; 761 | } 762 | 763 | if (dx != 0) { 764 | mCapturedView.offsetLeftAndRight(dx); 765 | } 766 | if (dy != 0) { 767 | mCapturedView.offsetTopAndBottom(dy); 768 | } 769 | 770 | if (dx != 0 || dy != 0) { 771 | mCallback.onViewPositionChanged(mCapturedView, x, y, dx, dy); 772 | } 773 | 774 | if (keepGoing && x == mScroller.getFinalX() && y == mScroller.getFinalY()) { 775 | // Close enough. The interpolator/scroller might think we're still moving 776 | // but the user sure doesn't. 777 | mScroller.abortAnimation(); 778 | keepGoing = mScroller.isFinished(); 779 | } 780 | 781 | if (!keepGoing) { 782 | if (deferCallbacks) { 783 | mParentView.post(mSetIdleRunnable); 784 | } else { 785 | setDragState(STATE_IDLE); 786 | } 787 | } 788 | } 789 | 790 | return mDragState == STATE_SETTLING; 791 | } 792 | 793 | /** 794 | * Like all callback events this must happen on the UI thread, but release 795 | * involves some extra semantics. During a release (mReleaseInProgress) 796 | * is the only time it is valid to call {@link #settleCapturedViewAt(int, int)} 797 | * or {@link #flingCapturedView(int, int, int, int)}. 798 | */ 799 | private void dispatchViewReleased(float xvel, float yvel) { 800 | mReleaseInProgress = true; 801 | mCallback.onViewReleased(mCapturedView, xvel, yvel); 802 | mReleaseInProgress = false; 803 | 804 | if (mDragState == STATE_DRAGGING) { 805 | // onViewReleased didn't call a method that would have changed this. Go idle. 806 | setDragState(STATE_IDLE); 807 | } 808 | } 809 | 810 | private void clearMotionHistory() { 811 | if (mInitialMotionX == null) { 812 | return; 813 | } 814 | Arrays.fill(mInitialMotionX, 0); 815 | Arrays.fill(mInitialMotionY, 0); 816 | Arrays.fill(mLastMotionX, 0); 817 | Arrays.fill(mLastMotionY, 0); 818 | Arrays.fill(mInitialEdgesTouched, 0); 819 | Arrays.fill(mEdgeDragsInProgress, 0); 820 | Arrays.fill(mEdgeDragsLocked, 0); 821 | mPointersDown = 0; 822 | } 823 | 824 | private void clearMotionHistory(int pointerId) { 825 | if (mInitialMotionX == null || mInitialMotionX.length <= pointerId) { 826 | return; 827 | } 828 | mInitialMotionX[pointerId] = 0; 829 | mInitialMotionY[pointerId] = 0; 830 | mLastMotionX[pointerId] = 0; 831 | mLastMotionY[pointerId] = 0; 832 | mInitialEdgesTouched[pointerId] = 0; 833 | mEdgeDragsInProgress[pointerId] = 0; 834 | mEdgeDragsLocked[pointerId] = 0; 835 | mPointersDown &= ~(1 << pointerId); 836 | } 837 | 838 | private void ensureMotionHistorySizeForId(int pointerId) { 839 | if (mInitialMotionX == null || mInitialMotionX.length <= pointerId) { 840 | float[] imx = new float[pointerId + 1]; 841 | float[] imy = new float[pointerId + 1]; 842 | float[] lmx = new float[pointerId + 1]; 843 | float[] lmy = new float[pointerId + 1]; 844 | int[] iit = new int[pointerId + 1]; 845 | int[] edip = new int[pointerId + 1]; 846 | int[] edl = new int[pointerId + 1]; 847 | 848 | if (mInitialMotionX != null) { 849 | System.arraycopy(mInitialMotionX, 0, imx, 0, mInitialMotionX.length); 850 | System.arraycopy(mInitialMotionY, 0, imy, 0, mInitialMotionY.length); 851 | System.arraycopy(mLastMotionX, 0, lmx, 0, mLastMotionX.length); 852 | System.arraycopy(mLastMotionY, 0, lmy, 0, mLastMotionY.length); 853 | System.arraycopy(mInitialEdgesTouched, 0, iit, 0, mInitialEdgesTouched.length); 854 | System.arraycopy(mEdgeDragsInProgress, 0, edip, 0, mEdgeDragsInProgress.length); 855 | System.arraycopy(mEdgeDragsLocked, 0, edl, 0, mEdgeDragsLocked.length); 856 | } 857 | 858 | mInitialMotionX = imx; 859 | mInitialMotionY = imy; 860 | mLastMotionX = lmx; 861 | mLastMotionY = lmy; 862 | mInitialEdgesTouched = iit; 863 | mEdgeDragsInProgress = edip; 864 | mEdgeDragsLocked = edl; 865 | } 866 | } 867 | 868 | private void saveInitialMotion(float x, float y, int pointerId) { 869 | ensureMotionHistorySizeForId(pointerId); 870 | mInitialMotionX[pointerId] = mLastMotionX[pointerId] = x; 871 | mInitialMotionY[pointerId] = mLastMotionY[pointerId] = y; 872 | mInitialEdgesTouched[pointerId] = getEdgesTouched((int) x, (int) y); 873 | mPointersDown |= 1 << pointerId; 874 | } 875 | 876 | private void saveLastMotion(MotionEvent ev) { 877 | final int pointerCount = MotionEventCompat.getPointerCount(ev); 878 | for (int i = 0; i < pointerCount; i++) { 879 | final int pointerId = MotionEventCompat.getPointerId(ev, i); 880 | final float x = MotionEventCompat.getX(ev, i); 881 | final float y = MotionEventCompat.getY(ev, i); 882 | // Sometimes we can try and save last motion for a pointer never recorded in initial motion. In this case we just discard it. 883 | if (mLastMotionX != null && mLastMotionY != null 884 | && mLastMotionX.length > pointerId && mLastMotionY.length > pointerId) { 885 | mLastMotionX[pointerId] = x; 886 | mLastMotionY[pointerId] = y; 887 | } 888 | } 889 | } 890 | 891 | /** 892 | * Check if the given pointer ID represents a pointer that is currently down (to the best 893 | * of the ViewDragHelper's knowledge). 894 | * 895 | *

The state used to report this information is populated by the methods 896 | * {@link #shouldInterceptTouchEvent(MotionEvent)} or 897 | * {@link #processTouchEvent(MotionEvent)}. If one of these methods has not 898 | * been called for all relevant MotionEvents to track, the information reported 899 | * by this method may be stale or incorrect.

900 | * 901 | * @param pointerId pointer ID to check; corresponds to IDs provided by MotionEvent 902 | * @return true if the pointer with the given ID is still down 903 | */ 904 | public boolean isPointerDown(int pointerId) { 905 | return (mPointersDown & 1 << pointerId) != 0; 906 | } 907 | 908 | void setDragState(int state) { 909 | if (mDragState != state) { 910 | mDragState = state; 911 | mCallback.onViewDragStateChanged(state); 912 | if (mDragState == STATE_IDLE) { 913 | mCapturedView = null; 914 | } 915 | } 916 | } 917 | 918 | /** 919 | * Attempt to capture the view with the given pointer ID. The callback will be involved. 920 | * This will put us into the "dragging" state. If we've already captured this view with 921 | * this pointer this method will immediately return true without consulting the callback. 922 | * 923 | * @param toCapture View to capture 924 | * @param pointerId Pointer to capture with 925 | * @return true if capture was successful 926 | */ 927 | boolean tryCaptureViewForDrag(View toCapture, int pointerId) { 928 | if (toCapture == mCapturedView && mActivePointerId == pointerId) { 929 | // Already done! 930 | return true; 931 | } 932 | if (toCapture != null && mCallback.tryCaptureView(toCapture, pointerId)) { 933 | mActivePointerId = pointerId; 934 | captureChildView(toCapture, pointerId); 935 | return true; 936 | } 937 | return false; 938 | } 939 | 940 | /** 941 | * Tests scrollability within child views of v given a delta of dx. 942 | * 943 | * @param v View to test for horizontal scrollability 944 | * @param checkV Whether the view v passed should itself be checked for scrollability (true), 945 | * or just its children (false). 946 | * @param dx Delta scrolled in pixels along the X axis 947 | * @param dy Delta scrolled in pixels along the Y axis 948 | * @param x X coordinate of the active touch point 949 | * @param y Y coordinate of the active touch point 950 | * @return true if child views of v can be scrolled by delta of dx. 951 | */ 952 | protected boolean canScroll(View v, boolean checkV, int dx, int dy, int x, int y) { 953 | if (v instanceof ViewGroup) { 954 | final ViewGroup group = (ViewGroup) v; 955 | final int scrollX = v.getScrollX(); 956 | final int scrollY = v.getScrollY(); 957 | final int count = group.getChildCount(); 958 | // Count backwards - let topmost views consume scroll distance first. 959 | for (int i = count - 1; i >= 0; i--) { 960 | // TODO: Add versioned support here for transformed views. 961 | // This will not work for transformed views in Honeycomb+ 962 | final View child = group.getChildAt(i); 963 | if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight() && 964 | y + scrollY >= child.getTop() && y + scrollY < child.getBottom() && 965 | canScroll(child, true, dx, dy, x + scrollX - child.getLeft(), 966 | y + scrollY - child.getTop())) { 967 | return true; 968 | } 969 | } 970 | } 971 | 972 | return checkV && (ViewCompat.canScrollHorizontally(v, -dx) || 973 | ViewCompat.canScrollVertically(v, -dy)); 974 | } 975 | 976 | /** 977 | * Check if this event as provided to the parent view's onInterceptTouchEvent should 978 | * cause the parent to intercept the touch event stream. 979 | * 980 | * @param ev MotionEvent provided to onInterceptTouchEvent 981 | * @return true if the parent view should return true from onInterceptTouchEvent 982 | */ 983 | public boolean shouldInterceptTouchEvent(MotionEvent ev) { 984 | final int action = MotionEventCompat.getActionMasked(ev); 985 | final int actionIndex = MotionEventCompat.getActionIndex(ev); 986 | 987 | if (action == MotionEvent.ACTION_DOWN) { 988 | // Reset things for a new event stream, just in case we didn't get 989 | // the whole previous stream. 990 | cancel(); 991 | } 992 | 993 | if (mVelocityTracker == null) { 994 | mVelocityTracker = VelocityTracker.obtain(); 995 | } 996 | mVelocityTracker.addMovement(ev); 997 | 998 | switch (action) { 999 | case MotionEvent.ACTION_DOWN: { 1000 | final float x = ev.getX(); 1001 | final float y = ev.getY(); 1002 | final int pointerId = MotionEventCompat.getPointerId(ev, 0); 1003 | saveInitialMotion(x, y, pointerId); 1004 | 1005 | final View toCapture = findTopChildUnder((int) x, (int) y); 1006 | 1007 | // Catch a settling view if possible. 1008 | if (toCapture == mCapturedView && mDragState == STATE_SETTLING) { 1009 | tryCaptureViewForDrag(toCapture, pointerId); 1010 | } 1011 | 1012 | final int edgesTouched = mInitialEdgesTouched[pointerId]; 1013 | if ((edgesTouched & mTrackingEdges) != 0) { 1014 | mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId); 1015 | } 1016 | break; 1017 | } 1018 | 1019 | case MotionEventCompat.ACTION_POINTER_DOWN: { 1020 | final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex); 1021 | final float x = MotionEventCompat.getX(ev, actionIndex); 1022 | final float y = MotionEventCompat.getY(ev, actionIndex); 1023 | 1024 | saveInitialMotion(x, y, pointerId); 1025 | 1026 | // A ViewDragHelper can only manipulate one view at a time. 1027 | if (mDragState == STATE_IDLE) { 1028 | final int edgesTouched = mInitialEdgesTouched[pointerId]; 1029 | if ((edgesTouched & mTrackingEdges) != 0) { 1030 | mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId); 1031 | } 1032 | } else if (mDragState == STATE_SETTLING) { 1033 | // Catch a settling view if possible. 1034 | final View toCapture = findTopChildUnder((int) x, (int) y); 1035 | if (toCapture == mCapturedView) { 1036 | tryCaptureViewForDrag(toCapture, pointerId); 1037 | } 1038 | } 1039 | break; 1040 | } 1041 | 1042 | case MotionEvent.ACTION_MOVE: { 1043 | // First to cross a touch slop over a draggable view wins. Also report edge drags. 1044 | final int pointerCount = MotionEventCompat.getPointerCount(ev); 1045 | for (int i = 0; i < pointerCount && mInitialMotionX != null && mInitialMotionY != null; i++) { 1046 | final int pointerId = MotionEventCompat.getPointerId(ev, i); 1047 | if (pointerId >= mInitialMotionX.length || pointerId >= mInitialMotionY.length) { 1048 | continue; 1049 | } 1050 | final float x = MotionEventCompat.getX(ev, i); 1051 | final float y = MotionEventCompat.getY(ev, i); 1052 | final float dx = x - mInitialMotionX[pointerId]; 1053 | final float dy = y - mInitialMotionY[pointerId]; 1054 | 1055 | reportNewEdgeDrags(dx, dy, pointerId); 1056 | if (mDragState == STATE_DRAGGING) { 1057 | // Callback might have started an edge drag 1058 | break; 1059 | } 1060 | 1061 | final View toCapture = findTopChildUnder((int)mInitialMotionX[pointerId], (int)mInitialMotionY[pointerId]); 1062 | if (toCapture != null && checkTouchSlop(toCapture, dx, dy) && 1063 | tryCaptureViewForDrag(toCapture, pointerId)) { 1064 | break; 1065 | } 1066 | } 1067 | saveLastMotion(ev); 1068 | break; 1069 | } 1070 | 1071 | case MotionEventCompat.ACTION_POINTER_UP: { 1072 | final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex); 1073 | clearMotionHistory(pointerId); 1074 | break; 1075 | } 1076 | 1077 | case MotionEvent.ACTION_UP: 1078 | case MotionEvent.ACTION_CANCEL: { 1079 | cancel(); 1080 | break; 1081 | } 1082 | } 1083 | 1084 | return mDragState == STATE_DRAGGING; 1085 | } 1086 | 1087 | /** 1088 | * Process a touch event received by the parent view. This method will dispatch callback events 1089 | * as needed before returning. The parent view's onTouchEvent implementation should call this. 1090 | * 1091 | * @param ev The touch event received by the parent view 1092 | */ 1093 | public void processTouchEvent(MotionEvent ev) { 1094 | final int action = MotionEventCompat.getActionMasked(ev); 1095 | final int actionIndex = MotionEventCompat.getActionIndex(ev); 1096 | 1097 | if (action == MotionEvent.ACTION_DOWN) { 1098 | // Reset things for a new event stream, just in case we didn't get 1099 | // the whole previous stream. 1100 | cancel(); 1101 | } 1102 | 1103 | if (mVelocityTracker == null) { 1104 | mVelocityTracker = VelocityTracker.obtain(); 1105 | } 1106 | mVelocityTracker.addMovement(ev); 1107 | 1108 | switch (action) { 1109 | case MotionEvent.ACTION_DOWN: { 1110 | final float x = ev.getX(); 1111 | final float y = ev.getY(); 1112 | final int pointerId = MotionEventCompat.getPointerId(ev, 0); 1113 | final View toCapture = findTopChildUnder((int) x, (int) y); 1114 | 1115 | saveInitialMotion(x, y, pointerId); 1116 | 1117 | // Since the parent is already directly processing this touch event, 1118 | // there is no reason to delay for a slop before dragging. 1119 | // Start immediately if possible. 1120 | tryCaptureViewForDrag(toCapture, pointerId); 1121 | 1122 | final int edgesTouched = mInitialEdgesTouched[pointerId]; 1123 | if ((edgesTouched & mTrackingEdges) != 0) { 1124 | mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId); 1125 | } 1126 | break; 1127 | } 1128 | 1129 | case MotionEventCompat.ACTION_POINTER_DOWN: { 1130 | final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex); 1131 | final float x = MotionEventCompat.getX(ev, actionIndex); 1132 | final float y = MotionEventCompat.getY(ev, actionIndex); 1133 | 1134 | saveInitialMotion(x, y, pointerId); 1135 | 1136 | // A ViewDragHelper can only manipulate one view at a time. 1137 | if (mDragState == STATE_IDLE) { 1138 | // If we're idle we can do anything! Treat it like a normal down event. 1139 | 1140 | final View toCapture = findTopChildUnder((int) x, (int) y); 1141 | tryCaptureViewForDrag(toCapture, pointerId); 1142 | 1143 | final int edgesTouched = mInitialEdgesTouched[pointerId]; 1144 | if ((edgesTouched & mTrackingEdges) != 0) { 1145 | mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId); 1146 | } 1147 | } else if (isCapturedViewUnder((int) x, (int) y)) { 1148 | // We're still tracking a captured view. If the same view is under this 1149 | // point, we'll swap to controlling it with this pointer instead. 1150 | // (This will still work if we're "catching" a settling view.) 1151 | 1152 | tryCaptureViewForDrag(mCapturedView, pointerId); 1153 | } 1154 | break; 1155 | } 1156 | 1157 | case MotionEvent.ACTION_MOVE: { 1158 | if (mDragState == STATE_DRAGGING) { 1159 | final int index = MotionEventCompat.findPointerIndex(ev, mActivePointerId); 1160 | final float x = MotionEventCompat.getX(ev, index); 1161 | final float y = MotionEventCompat.getY(ev, index); 1162 | final int idx = (int) (x - mLastMotionX[mActivePointerId]); 1163 | final int idy = (int) (y - mLastMotionY[mActivePointerId]); 1164 | 1165 | dragTo(mCapturedView.getLeft() + idx, mCapturedView.getTop() + idy, idx, idy); 1166 | 1167 | saveLastMotion(ev); 1168 | } else { 1169 | // Check to see if any pointer is now over a draggable view. 1170 | final int pointerCount = MotionEventCompat.getPointerCount(ev); 1171 | for (int i = 0; i < pointerCount; i++) { 1172 | final int pointerId = MotionEventCompat.getPointerId(ev, i) 1173 | ; 1174 | final float x = MotionEventCompat.getX(ev, i); 1175 | final float y = MotionEventCompat.getY(ev, i); 1176 | final float dx = x - mInitialMotionX[pointerId]; 1177 | final float dy = y - mInitialMotionY[pointerId]; 1178 | 1179 | reportNewEdgeDrags(dx, dy, pointerId); 1180 | if (mDragState == STATE_DRAGGING) { 1181 | // Callback might have started an edge drag. 1182 | break; 1183 | } 1184 | 1185 | final View toCapture = findTopChildUnder((int) mInitialMotionX[pointerId], (int) mInitialMotionY[pointerId]); 1186 | if (checkTouchSlop(toCapture, dx, dy) && 1187 | tryCaptureViewForDrag(toCapture, pointerId)) { 1188 | break; 1189 | } 1190 | } 1191 | saveLastMotion(ev); 1192 | } 1193 | break; 1194 | } 1195 | 1196 | case MotionEventCompat.ACTION_POINTER_UP: { 1197 | final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex); 1198 | if (mDragState == STATE_DRAGGING && pointerId == mActivePointerId) { 1199 | // Try to find another pointer that's still holding on to the captured view. 1200 | int newActivePointer = INVALID_POINTER; 1201 | final int pointerCount = MotionEventCompat.getPointerCount(ev); 1202 | for (int i = 0; i < pointerCount; i++) { 1203 | final int id = MotionEventCompat.getPointerId(ev, i); 1204 | if (id == mActivePointerId) { 1205 | // This one's going away, skip. 1206 | continue; 1207 | } 1208 | 1209 | final float x = MotionEventCompat.getX(ev, i); 1210 | final float y = MotionEventCompat.getY(ev, i); 1211 | if (findTopChildUnder((int) x, (int) y) == mCapturedView && 1212 | tryCaptureViewForDrag(mCapturedView, id)) { 1213 | newActivePointer = mActivePointerId; 1214 | break; 1215 | } 1216 | } 1217 | 1218 | if (newActivePointer == INVALID_POINTER) { 1219 | // We didn't find another pointer still touching the view, release it. 1220 | releaseViewForPointerUp(); 1221 | } 1222 | } 1223 | clearMotionHistory(pointerId); 1224 | break; 1225 | } 1226 | 1227 | case MotionEvent.ACTION_UP: { 1228 | if (mDragState == STATE_DRAGGING) { 1229 | releaseViewForPointerUp(); 1230 | } 1231 | cancel(); 1232 | break; 1233 | } 1234 | 1235 | case MotionEvent.ACTION_CANCEL: { 1236 | if (mDragState == STATE_DRAGGING) { 1237 | dispatchViewReleased(0, 0); 1238 | } 1239 | cancel(); 1240 | break; 1241 | } 1242 | } 1243 | } 1244 | 1245 | private void reportNewEdgeDrags(float dx, float dy, int pointerId) { 1246 | int dragsStarted = 0; 1247 | if (checkNewEdgeDrag(dx, dy, pointerId, EDGE_LEFT)) { 1248 | dragsStarted |= EDGE_LEFT; 1249 | } 1250 | if (checkNewEdgeDrag(dy, dx, pointerId, EDGE_TOP)) { 1251 | dragsStarted |= EDGE_TOP; 1252 | } 1253 | if (checkNewEdgeDrag(dx, dy, pointerId, EDGE_RIGHT)) { 1254 | dragsStarted |= EDGE_RIGHT; 1255 | } 1256 | if (checkNewEdgeDrag(dy, dx, pointerId, EDGE_BOTTOM)) { 1257 | dragsStarted |= EDGE_BOTTOM; 1258 | } 1259 | 1260 | if (dragsStarted != 0) { 1261 | mEdgeDragsInProgress[pointerId] |= dragsStarted; 1262 | mCallback.onEdgeDragStarted(dragsStarted, pointerId); 1263 | } 1264 | } 1265 | 1266 | private boolean checkNewEdgeDrag(float delta, float odelta, int pointerId, int edge) { 1267 | final float absDelta = Math.abs(delta); 1268 | final float absODelta = Math.abs(odelta); 1269 | 1270 | if ((mInitialEdgesTouched[pointerId] & edge) != edge || (mTrackingEdges & edge) == 0 || 1271 | (mEdgeDragsLocked[pointerId] & edge) == edge || 1272 | (mEdgeDragsInProgress[pointerId] & edge) == edge || 1273 | (absDelta <= mTouchSlop && absODelta <= mTouchSlop)) { 1274 | return false; 1275 | } 1276 | if (absDelta < absODelta * 0.5f && mCallback.onEdgeLock(edge)) { 1277 | mEdgeDragsLocked[pointerId] |= edge; 1278 | return false; 1279 | } 1280 | return (mEdgeDragsInProgress[pointerId] & edge) == 0 && absDelta > mTouchSlop; 1281 | } 1282 | 1283 | /** 1284 | * Check if we've crossed a reasonable touch slop for the given child view. 1285 | * If the child cannot be dragged along the horizontal or vertical axis, motion 1286 | * along that axis will not count toward the slop check. 1287 | * 1288 | * @param child Child to check 1289 | * @param dx Motion since initial position along X axis 1290 | * @param dy Motion since initial position along Y axis 1291 | * @return true if the touch slop has been crossed 1292 | */ 1293 | private boolean checkTouchSlop(View child, float dx, float dy) { 1294 | if (child == null) { 1295 | return false; 1296 | } 1297 | final boolean checkHorizontal = mCallback.getViewHorizontalDragRange(child) > 0; 1298 | final boolean checkVertical = mCallback.getViewVerticalDragRange(child) > 0; 1299 | 1300 | if (checkHorizontal && checkVertical) { 1301 | return dx * dx + dy * dy > mTouchSlop * mTouchSlop; 1302 | } else if (checkHorizontal) { 1303 | return Math.abs(dx) > mTouchSlop; 1304 | } else if (checkVertical) { 1305 | return Math.abs(dy) > mTouchSlop; 1306 | } 1307 | return false; 1308 | } 1309 | 1310 | /** 1311 | * Check if any pointer tracked in the current gesture has crossed 1312 | * the required slop threshold. 1313 | * 1314 | *

This depends on internal state populated by 1315 | * {@link #shouldInterceptTouchEvent(MotionEvent)} or 1316 | * {@link #processTouchEvent(MotionEvent)}. You should only rely on 1317 | * the results of this method after all currently available touch data 1318 | * has been provided to one of these two methods.

1319 | * 1320 | * @param directions Combination of direction flags, see {@link #DIRECTION_HORIZONTAL}, 1321 | * {@link #DIRECTION_VERTICAL}, {@link #DIRECTION_ALL} 1322 | * @return true if the slop threshold has been crossed, false otherwise 1323 | */ 1324 | public boolean checkTouchSlop(int directions) { 1325 | final int count = mInitialMotionX.length; 1326 | for (int i = 0; i < count; i++) { 1327 | if (checkTouchSlop(directions, i)) { 1328 | return true; 1329 | } 1330 | } 1331 | return false; 1332 | } 1333 | 1334 | /** 1335 | * Check if the specified pointer tracked in the current gesture has crossed 1336 | * the required slop threshold. 1337 | * 1338 | *

This depends on internal state populated by 1339 | * {@link #shouldInterceptTouchEvent(MotionEvent)} or 1340 | * {@link #processTouchEvent(MotionEvent)}. You should only rely on 1341 | * the results of this method after all currently available touch data 1342 | * has been provided to one of these two methods.

1343 | * 1344 | * @param directions Combination of direction flags, see {@link #DIRECTION_HORIZONTAL}, 1345 | * {@link #DIRECTION_VERTICAL}, {@link #DIRECTION_ALL} 1346 | * @param pointerId ID of the pointer to slop check as specified by MotionEvent 1347 | * @return true if the slop threshold has been crossed, false otherwise 1348 | */ 1349 | public boolean checkTouchSlop(int directions, int pointerId) { 1350 | if (!isPointerDown(pointerId)) { 1351 | return false; 1352 | } 1353 | 1354 | final boolean checkHorizontal = (directions & DIRECTION_HORIZONTAL) == DIRECTION_HORIZONTAL; 1355 | final boolean checkVertical = (directions & DIRECTION_VERTICAL) == DIRECTION_VERTICAL; 1356 | 1357 | final float dx = mLastMotionX[pointerId] - mInitialMotionX[pointerId]; 1358 | final float dy = mLastMotionY[pointerId] - mInitialMotionY[pointerId]; 1359 | 1360 | if (checkHorizontal && checkVertical) { 1361 | return dx * dx + dy * dy > mTouchSlop * mTouchSlop; 1362 | } else if (checkHorizontal) { 1363 | return Math.abs(dx) > mTouchSlop; 1364 | } else if (checkVertical) { 1365 | return Math.abs(dy) > mTouchSlop; 1366 | } 1367 | return false; 1368 | } 1369 | 1370 | /** 1371 | * Check if any of the edges specified were initially touched in the currently active gesture. 1372 | * If there is no currently active gesture this method will return false. 1373 | * 1374 | * @param edges Edges to check for an initial edge touch. See {@link #EDGE_LEFT}, 1375 | * {@link #EDGE_TOP}, {@link #EDGE_RIGHT}, {@link #EDGE_BOTTOM} and 1376 | * {@link #EDGE_ALL} 1377 | * @return true if any of the edges specified were initially touched in the current gesture 1378 | */ 1379 | public boolean isEdgeTouched(int edges) { 1380 | final int count = mInitialEdgesTouched.length; 1381 | for (int i = 0; i < count; i++) { 1382 | if (isEdgeTouched(edges, i)) { 1383 | return true; 1384 | } 1385 | } 1386 | return false; 1387 | } 1388 | 1389 | /** 1390 | * Check if any of the edges specified were initially touched by the pointer with 1391 | * the specified ID. If there is no currently active gesture or if there is no pointer with 1392 | * the given ID currently down this method will return false. 1393 | * 1394 | * @param edges Edges to check for an initial edge touch. See {@link #EDGE_LEFT}, 1395 | * {@link #EDGE_TOP}, {@link #EDGE_RIGHT}, {@link #EDGE_BOTTOM} and 1396 | * {@link #EDGE_ALL} 1397 | * @return true if any of the edges specified were initially touched in the current gesture 1398 | */ 1399 | public boolean isEdgeTouched(int edges, int pointerId) { 1400 | return isPointerDown(pointerId) && (mInitialEdgesTouched[pointerId] & edges) != 0; 1401 | } 1402 | 1403 | public boolean isDragging() { 1404 | return mDragState == STATE_DRAGGING; 1405 | } 1406 | 1407 | private void releaseViewForPointerUp() { 1408 | mVelocityTracker.computeCurrentVelocity(1000, mMaxVelocity); 1409 | final float xvel = clampMag( 1410 | VelocityTrackerCompat.getXVelocity(mVelocityTracker, mActivePointerId), 1411 | mMinVelocity, mMaxVelocity); 1412 | final float yvel = clampMag( 1413 | VelocityTrackerCompat.getYVelocity(mVelocityTracker, mActivePointerId), 1414 | mMinVelocity, mMaxVelocity); 1415 | dispatchViewReleased(xvel, yvel); 1416 | } 1417 | 1418 | private void dragTo(int left, int top, int dx, int dy) { 1419 | int clampedX = left; 1420 | int clampedY = top; 1421 | final int oldLeft = mCapturedView.getLeft(); 1422 | final int oldTop = mCapturedView.getTop(); 1423 | if (dx != 0) { 1424 | clampedX = mCallback.clampViewPositionHorizontal(mCapturedView, left, dx); 1425 | mCapturedView.offsetLeftAndRight(clampedX - oldLeft); 1426 | } 1427 | if (dy != 0) { 1428 | clampedY = mCallback.clampViewPositionVertical(mCapturedView, top, dy); 1429 | mCapturedView.offsetTopAndBottom(clampedY - oldTop); 1430 | } 1431 | 1432 | if (dx != 0 || dy != 0) { 1433 | final int clampedDx = clampedX - oldLeft; 1434 | final int clampedDy = clampedY - oldTop; 1435 | mCallback.onViewPositionChanged(mCapturedView, clampedX, clampedY, 1436 | clampedDx, clampedDy); 1437 | } 1438 | } 1439 | 1440 | /** 1441 | * Determine if the currently captured view is under the given point in the 1442 | * parent view's coordinate system. If there is no captured view this method 1443 | * will return false. 1444 | * 1445 | * @param x X position to test in the parent's coordinate system 1446 | * @param y Y position to test in the parent's coordinate system 1447 | * @return true if the captured view is under the given point, false otherwise 1448 | */ 1449 | public boolean isCapturedViewUnder(int x, int y) { 1450 | return isViewUnder(mCapturedView, x, y); 1451 | } 1452 | 1453 | /** 1454 | * Determine if the supplied view is under the given point in the 1455 | * parent view's coordinate system. 1456 | * 1457 | * @param view Child view of the parent to hit test 1458 | * @param x X position to test in the parent's coordinate system 1459 | * @param y Y position to test in the parent's coordinate system 1460 | * @return true if the supplied view is under the given point, false otherwise 1461 | */ 1462 | public boolean isViewUnder(View view, int x, int y) { 1463 | if (view == null) { 1464 | return false; 1465 | } 1466 | return x >= view.getLeft() && 1467 | x < view.getRight() && 1468 | y >= view.getTop() && 1469 | y < view.getBottom(); 1470 | } 1471 | 1472 | /** 1473 | * Find the topmost child under the given point within the parent view's coordinate system. 1474 | * The child order is determined using {@link Callback#getOrderedChildIndex(int)}. 1475 | * 1476 | * @param x X position to test in the parent's coordinate system 1477 | * @param y Y position to test in the parent's coordinate system 1478 | * @return The topmost child view under (x, y) or null if none found. 1479 | */ 1480 | public View findTopChildUnder(int x, int y) { 1481 | final int childCount = mParentView.getChildCount(); 1482 | for (int i = childCount - 1; i >= 0; i--) { 1483 | final View child = mParentView.getChildAt(mCallback.getOrderedChildIndex(i)); 1484 | if (x >= child.getLeft() && x < child.getRight() && 1485 | y >= child.getTop() && y < child.getBottom()) { 1486 | return child; 1487 | } 1488 | } 1489 | return null; 1490 | } 1491 | 1492 | private int getEdgesTouched(int x, int y) { 1493 | int result = 0; 1494 | 1495 | if (x < mParentView.getLeft() + mEdgeSize) result |= EDGE_LEFT; 1496 | if (y < mParentView.getTop() + mEdgeSize) result |= EDGE_TOP; 1497 | if (x > mParentView.getRight() - mEdgeSize) result |= EDGE_RIGHT; 1498 | if (y > mParentView.getBottom() - mEdgeSize) result |= EDGE_BOTTOM; 1499 | 1500 | return result; 1501 | } 1502 | } 1503 | -------------------------------------------------------------------------------- /SlideNestedPanel/src/main/res/values/attrs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | -------------------------------------------------------------------------------- /SlideNestedPanel/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | slideNested 3 | 4 | -------------------------------------------------------------------------------- /SlideNestedPanel/src/test/java/com/snail/slidenested/ExampleUnitTest.java: -------------------------------------------------------------------------------- 1 | package com.snail.slidenested; 2 | 3 | import org.junit.Test; 4 | 5 | import static org.junit.Assert.*; 6 | 7 | /** 8 | * Example local unit test, which will execute on the development machine (host). 9 | * 10 | * @see Testing documentation 11 | */ 12 | public class ExampleUnitTest { 13 | @Test 14 | public void addition_isCorrect() { 15 | assertEquals(4, 2 + 2); 16 | } 17 | } -------------------------------------------------------------------------------- /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | android { 4 | compileSdkVersion 28 5 | defaultConfig { 6 | applicationId "com.snail.slidenested" 7 | minSdkVersion 19 8 | targetSdkVersion 28 9 | versionCode 1 10 | versionName "1.0.0" 11 | testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 12 | } 13 | buildTypes { 14 | release { 15 | minifyEnabled false 16 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 17 | } 18 | } 19 | } 20 | 21 | dependencies { 22 | implementation fileTree(dir: 'libs', include: ['*.jar']) 23 | implementation 'com.android.support.constraint:constraint-layout:1.1.3' 24 | implementation "com.android.support:appcompat-v7:28.0.0" 25 | implementation "com.android.support:design:28.0.0" 26 | testImplementation 'junit:junit:4.12' 27 | androidTestImplementation 'com.android.support.test:runner:1.0.2' 28 | androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2' 29 | 30 | implementation project(':SlideNestedPanel') 31 | } 32 | -------------------------------------------------------------------------------- /app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # You can control the set of applied configuration files using the 3 | # proguardFiles setting in build.gradle. 4 | # 5 | # For more details, see 6 | # http://developer.android.com/guide/developing/tools/proguard.html 7 | 8 | # If your project uses WebView with JS, uncomment the following 9 | # and specify the fully qualified class name to the JavaScript interface 10 | # class: 11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 12 | # public *; 13 | #} 14 | 15 | # Uncomment this to preserve the line number information for 16 | # debugging stack traces. 17 | #-keepattributes SourceFile,LineNumberTable 18 | 19 | # If you keep the line number information, uncomment this to 20 | # hide the original source file name. 21 | #-renamesourcefileattribute SourceFile 22 | -------------------------------------------------------------------------------- /app/src/androidTest/java/com/snail/slidenested/ExampleInstrumentedTest.java: -------------------------------------------------------------------------------- 1 | package com.snail.slidenested; 2 | 3 | import android.content.Context; 4 | import android.support.test.InstrumentationRegistry; 5 | import android.support.test.runner.AndroidJUnit4; 6 | 7 | import org.junit.Test; 8 | import org.junit.runner.RunWith; 9 | 10 | import static org.junit.Assert.*; 11 | 12 | /** 13 | * Instrumented test, which will execute on an Android device. 14 | * 15 | * @see Testing documentation 16 | */ 17 | @RunWith(AndroidJUnit4.class) 18 | public class ExampleInstrumentedTest { 19 | @Test 20 | public void useAppContext() { 21 | // Context of the app under test. 22 | Context appContext = InstrumentationRegistry.getTargetContext(); 23 | 24 | assertEquals("com.snail.slidenested", appContext.getPackageName()); 25 | } 26 | } 27 | -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | -------------------------------------------------------------------------------- /app/src/main/java/com/snail/slidenested/MainActivity.java: -------------------------------------------------------------------------------- 1 | package com.snail.slidenested; 2 | 3 | import android.graphics.Color; 4 | import android.support.design.widget.TabLayout; 5 | import android.support.v4.widget.NestedScrollView; 6 | import android.support.v7.app.AppCompatActivity; 7 | import android.os.Bundle; 8 | import android.util.Log; 9 | import android.widget.FrameLayout; 10 | 11 | public class MainActivity extends AppCompatActivity { 12 | 13 | @Override 14 | protected void onCreate(Bundle savedInstanceState) { 15 | super.onCreate(savedInstanceState); 16 | setContentView(R.layout.activity_main); 17 | 18 | final FrameLayout mFrameLayout = findViewById(R.id.frameLayout); 19 | TabLayout mTabLayout = findViewById(R.id.tabLayout); 20 | mTabLayout.setTabMode(TabLayout.MODE_SCROLLABLE); 21 | mTabLayout.addTab(mTabLayout.newTab().setText("费用说明")); 22 | mTabLayout.addTab(mTabLayout.newTab().setText("预定须知")); 23 | mTabLayout.addTab(mTabLayout.newTab().setText("退款政策")); 24 | mTabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() { 25 | @Override 26 | public void onTabSelected(TabLayout.Tab tab) { 27 | switch (tab.getPosition()) { 28 | case 0: 29 | mFrameLayout.setBackgroundColor(Color.parseColor("#ff0000")); 30 | break; 31 | 32 | case 1: 33 | mFrameLayout.setBackgroundColor(Color.parseColor("#0000ff")); 34 | break; 35 | 36 | case 2: 37 | mFrameLayout.setBackgroundColor(Color.parseColor("#00ff00")); 38 | break; 39 | } 40 | } 41 | 42 | @Override 43 | public void onTabUnselected(TabLayout.Tab tab) { 44 | 45 | } 46 | 47 | @Override 48 | public void onTabReselected(TabLayout.Tab tab) { 49 | 50 | } 51 | }); 52 | 53 | NestedScrollView mScrollView = findViewById(R.id.nestedScrollView); 54 | mScrollView.animate().translationY(-150).alpha(1.0f).setDuration(500); 55 | 56 | SlideNestedPanelLayout mPanelLayout = findViewById(R.id.slideNestedPanelLayout); 57 | mPanelLayout.setStateCallback(new StateCallback() { 58 | @Override 59 | public void onExpandedState() { 60 | Log.i("-->","onExpandedState"); 61 | } 62 | 63 | @Override 64 | public void onCollapsedState() { 65 | Log.i("-->","onCollapsedState"); 66 | } 67 | }); 68 | } 69 | } 70 | -------------------------------------------------------------------------------- /app/src/main/res/drawable-v24/ic_launcher_foreground.xml: -------------------------------------------------------------------------------- 1 | 7 | 12 | 13 | 19 | 22 | 25 | 26 | 27 | 28 | 34 | 35 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/bg_cardview_white_top.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/ic_launcher_background.xml: -------------------------------------------------------------------------------- 1 | 2 | 7 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 125 | 130 | 135 | 140 | 145 | 150 | 155 | 160 | 165 | 170 | 171 | -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 8 | 9 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | -------------------------------------------------------------------------------- /app/src/main/res/layout/include_main_content.xml: -------------------------------------------------------------------------------- 1 | 2 | 12 | 13 | 18 | 19 | 31 | 32 | 38 | 39 | 40 | 41 | 55 | 56 | 68 | 69 | 83 | 84 | 95 | 96 | 97 | 111 | 112 | 113 | 127 | 128 | 135 | 136 | 145 | 146 | 154 | 155 | 167 | 168 | 175 | 176 | 188 | 189 | 196 | 197 | 198 | 199 | -------------------------------------------------------------------------------- /app/src/main/res/layout/include_main_top.xml: -------------------------------------------------------------------------------- 1 | 2 | 6 | 7 | 14 | 15 | 25 | 26 | 36 | 37 | 47 | 48 | 49 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/BmobSnail/SlideNestedPanelLayout/76da7e08b586eb7b22bccd8174cc483e91a34881/app/src/main/res/mipmap-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/BmobSnail/SlideNestedPanelLayout/76da7e08b586eb7b22bccd8174cc483e91a34881/app/src/main/res/mipmap-hdpi/ic_launcher_round.png -------------------------------------------------------------------------------- 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/app/src/main/res/mipmap-xhdpi/icon_tour_background.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/BmobSnail/SlideNestedPanelLayout/76da7e08b586eb7b22bccd8174cc483e91a34881/app/src/main/res/mipmap-xhdpi/icon_tour_background.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/icon_tour_forward.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/BmobSnail/SlideNestedPanelLayout/76da7e08b586eb7b22bccd8174cc483e91a34881/app/src/main/res/mipmap-xhdpi/icon_tour_forward.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/icon_tour_label.png: -------------------------------------------------------------------------------- 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/app/src/main/res/mipmap-xhdpi/icon_tour_map.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/BmobSnail/SlideNestedPanelLayout/76da7e08b586eb7b22bccd8174cc483e91a34881/app/src/main/res/mipmap-xhdpi/icon_tour_map.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/BmobSnail/SlideNestedPanelLayout/76da7e08b586eb7b22bccd8174cc483e91a34881/app/src/main/res/mipmap-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- 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/app/src/main/res/values/colors.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | #008577 4 | #00574B 5 | #D81B60 6 | 7 | #FFFFFF 8 | #666 9 | #ccc 10 | #FFD328 11 | 12 | #F2F2F2 13 | 14 | -------------------------------------------------------------------------------- /app/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | SlideNestedPanelLayout 3 | 4 | -------------------------------------------------------------------------------- /app/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /app/src/test/java/com/snail/slidenested/ExampleUnitTest.java: -------------------------------------------------------------------------------- 1 | package com.snail.slidenested; 2 | 3 | import org.junit.Test; 4 | 5 | import static org.junit.Assert.*; 6 | 7 | /** 8 | * Example local unit test, which will execute on the development machine (host). 9 | * 10 | * @see Testing documentation 11 | */ 12 | public class ExampleUnitTest { 13 | @Test 14 | public void addition_isCorrect() { 15 | assertEquals(4, 2 + 2); 16 | } 17 | } -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | // Top-level build file where you can add configuration options common to all sub-projects/modules. 2 | 3 | buildscript { 4 | 5 | repositories { 6 | google() 7 | jcenter() 8 | } 9 | dependencies { 10 | classpath 'com.android.tools.build:gradle:3.2.1' 11 | 12 | 13 | // NOTE: Do not place your application dependencies here; they belong 14 | // in the individual module build.gradle files 15 | } 16 | } 17 | 18 | allprojects { 19 | repositories { 20 | google() 21 | jcenter() 22 | } 23 | } 24 | 25 | task clean(type: Delete) { 26 | delete rootProject.buildDir 27 | } 28 | -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | # Project-wide Gradle settings. 2 | # IDE (e.g. Android Studio) users: 3 | # Gradle settings configured through the IDE *will override* 4 | # any settings specified in this file. 5 | # For more details on how to configure your build environment visit 6 | # http://www.gradle.org/docs/current/userguide/build_environment.html 7 | # Specifies the JVM arguments used for the daemon process. 8 | # The setting is particularly useful for tweaking memory settings. 9 | org.gradle.jvmargs=-Xmx1536m 10 | # When configured, Gradle will run in incubating parallel mode. 11 | # This option should only be used with decoupled projects. More details, visit 12 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects 13 | # org.gradle.parallel=true 14 | 15 | 16 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/BmobSnail/SlideNestedPanelLayout/76da7e08b586eb7b22bccd8174cc483e91a34881/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | ############################################################################## 4 | ## 5 | ## Gradle start up script for UN*X 6 | ## 7 | ############################################################################## 8 | 9 | # Attempt to set APP_HOME 10 | # Resolve links: $0 may be a link 11 | PRG="$0" 12 | # Need this for relative symlinks. 13 | while [ -h "$PRG" ] ; do 14 | ls=`ls -ld "$PRG"` 15 | link=`expr "$ls" : '.*-> \(.*\)$'` 16 | if expr "$link" : '/.*' > /dev/null; then 17 | PRG="$link" 18 | else 19 | PRG=`dirname "$PRG"`"/$link" 20 | fi 21 | done 22 | SAVED="`pwd`" 23 | cd "`dirname \"$PRG\"`/" >/dev/null 24 | APP_HOME="`pwd -P`" 25 | cd "$SAVED" >/dev/null 26 | 27 | APP_NAME="Gradle" 28 | APP_BASE_NAME=`basename "$0"` 29 | 30 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 31 | DEFAULT_JVM_OPTS="" 32 | 33 | # Use the maximum available, or set MAX_FD != -1 to use that value. 34 | MAX_FD="maximum" 35 | 36 | warn () { 37 | echo "$*" 38 | } 39 | 40 | die () { 41 | echo 42 | echo "$*" 43 | echo 44 | exit 1 45 | } 46 | 47 | # OS specific support (must be 'true' or 'false'). 48 | cygwin=false 49 | msys=false 50 | darwin=false 51 | nonstop=false 52 | case "`uname`" in 53 | CYGWIN* ) 54 | cygwin=true 55 | ;; 56 | Darwin* ) 57 | darwin=true 58 | ;; 59 | MINGW* ) 60 | msys=true 61 | ;; 62 | NONSTOP* ) 63 | nonstop=true 64 | ;; 65 | esac 66 | 67 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 68 | 69 | # Determine the Java command to use to start the JVM. 70 | if [ -n "$JAVA_HOME" ] ; then 71 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 72 | # IBM's JDK on AIX uses strange locations for the executables 73 | JAVACMD="$JAVA_HOME/jre/sh/java" 74 | else 75 | JAVACMD="$JAVA_HOME/bin/java" 76 | fi 77 | if [ ! -x "$JAVACMD" ] ; then 78 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 79 | 80 | Please set the JAVA_HOME variable in your environment to match the 81 | location of your Java installation." 82 | fi 83 | else 84 | JAVACMD="java" 85 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 86 | 87 | Please set the JAVA_HOME variable in your environment to match the 88 | location of your Java installation." 89 | fi 90 | 91 | # Increase the maximum file descriptors if we can. 92 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 93 | MAX_FD_LIMIT=`ulimit -H -n` 94 | if [ $? -eq 0 ] ; then 95 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 96 | MAX_FD="$MAX_FD_LIMIT" 97 | fi 98 | ulimit -n $MAX_FD 99 | if [ $? -ne 0 ] ; then 100 | warn "Could not set maximum file descriptor limit: $MAX_FD" 101 | fi 102 | else 103 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 104 | fi 105 | fi 106 | 107 | # For Darwin, add options to specify how the application appears in the dock 108 | if $darwin; then 109 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 110 | fi 111 | 112 | # For Cygwin, switch paths to Windows format before running java 113 | if $cygwin ; then 114 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 115 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 116 | JAVACMD=`cygpath --unix "$JAVACMD"` 117 | 118 | # We build the pattern for arguments to be converted via cygpath 119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 120 | SEP="" 121 | for dir in $ROOTDIRSRAW ; do 122 | ROOTDIRS="$ROOTDIRS$SEP$dir" 123 | SEP="|" 124 | done 125 | OURCYGPATTERN="(^($ROOTDIRS))" 126 | # Add a user-defined pattern to the cygpath arguments 127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 129 | fi 130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 131 | i=0 132 | for arg in "$@" ; do 133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 135 | 136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 138 | else 139 | eval `echo args$i`="\"$arg\"" 140 | fi 141 | i=$((i+1)) 142 | done 143 | case $i in 144 | (0) set -- ;; 145 | (1) set -- "$args0" ;; 146 | (2) set -- "$args0" "$args1" ;; 147 | (3) set -- "$args0" "$args1" "$args2" ;; 148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 154 | esac 155 | fi 156 | 157 | # Escape application args 158 | save () { 159 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 160 | echo " " 161 | } 162 | APP_ARGS=$(save "$@") 163 | 164 | # Collect all arguments for the java command, following the shell quoting and substitution rules 165 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 166 | 167 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong 168 | if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then 169 | cd "$(dirname "$0")" 170 | fi 171 | 172 | exec "$JAVACMD" "$@" 173 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @if "%DEBUG%" == "" @echo off 2 | @rem ########################################################################## 3 | @rem 4 | @rem Gradle startup script for Windows 5 | @rem 6 | @rem ########################################################################## 7 | 8 | @rem Set local scope for the variables with windows NT shell 9 | if "%OS%"=="Windows_NT" setlocal 10 | 11 | set DIRNAME=%~dp0 12 | if "%DIRNAME%" == "" set DIRNAME=. 13 | set APP_BASE_NAME=%~n0 14 | set APP_HOME=%DIRNAME% 15 | 16 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 17 | set DEFAULT_JVM_OPTS= 18 | 19 | @rem Find java.exe 20 | if defined JAVA_HOME goto findJavaFromJavaHome 21 | 22 | set JAVA_EXE=java.exe 23 | %JAVA_EXE% -version >NUL 2>&1 24 | if "%ERRORLEVEL%" == "0" goto init 25 | 26 | echo. 27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 28 | echo. 29 | echo Please set the JAVA_HOME variable in your environment to match the 30 | echo location of your Java installation. 31 | 32 | goto fail 33 | 34 | :findJavaFromJavaHome 35 | set JAVA_HOME=%JAVA_HOME:"=% 36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 37 | 38 | if exist "%JAVA_EXE%" goto init 39 | 40 | echo. 41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 42 | echo. 43 | echo Please set the JAVA_HOME variable in your environment to match the 44 | echo location of your Java installation. 45 | 46 | goto fail 47 | 48 | :init 49 | @rem Get command-line arguments, handling Windows variants 50 | 51 | if not "%OS%" == "Windows_NT" goto win9xME_args 52 | 53 | :win9xME_args 54 | @rem Slurp the command line arguments. 55 | set CMD_LINE_ARGS= 56 | set _SKIP=2 57 | 58 | :win9xME_args_slurp 59 | if "x%~1" == "x" goto execute 60 | 61 | set CMD_LINE_ARGS=%* 62 | 63 | :execute 64 | @rem Setup the command line 65 | 66 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 67 | 68 | @rem Execute Gradle 69 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 70 | 71 | :end 72 | @rem End local scope for the variables with windows NT shell 73 | if "%ERRORLEVEL%"=="0" goto mainEnd 74 | 75 | :fail 76 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 77 | rem the _cmd.exe /c_ return code! 78 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 79 | exit /b 1 80 | 81 | :mainEnd 82 | if "%OS%"=="Windows_NT" endlocal 83 | 84 | :omega 85 | -------------------------------------------------------------------------------- /screenshot/sample.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/BmobSnail/SlideNestedPanelLayout/76da7e08b586eb7b22bccd8174cc483e91a34881/screenshot/sample.gif -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | include ':app', ':SlideNestedPanel' 2 | --------------------------------------------------------------------------------