├── .gitignore
├── README.md
├── ScreenCapture
└── screen.gif
├── apk
└── StickyScrollViewSample.apk
├── libarary
├── .classpath
├── .project
├── AndroidManifest.xml
├── proguard-project.txt
├── project.properties
└── src
│ └── com
│ └── likebamboo
│ └── stickyscrollview
│ ├── StickyScrollView.java
│ ├── StickyScrollViewCallbacks.java
│ ├── StickyScrollViewGlobalLayoutListener.java
│ └── animation
│ ├── AnimatorProxy.java
│ └── ViewHelper.java
└── sample
├── .classpath
├── .project
├── AndroidManifest.xml
├── proguard-project.txt
├── project.properties
├── res
├── drawable-hdpi
│ └── ic_launcher.png
├── drawable-mdpi
│ └── ic_launcher.png
├── drawable-xhdpi
│ └── ic_launcher.png
├── layout
│ └── activity_main.xml
└── values
│ ├── colors.xml
│ ├── dimens.xml
│ ├── id.xml
│ ├── strings.xml
│ └── styles.xml
└── src
└── com
└── likebamboo
└── stickyscrollview
└── sample
└── MainActivity.java
/.gitignore:
--------------------------------------------------------------------------------
1 | .settings/
2 | # Built application files
3 | *.ap_
4 |
5 | # Files for the Dalvik VM
6 | *.dex
7 |
8 | # Java class files
9 | *.class
10 |
11 | # Generated files
12 | bin/
13 | gen/
14 |
15 | # Gradle files
16 | .gradle/
17 | build/
18 |
19 | # Local configuration file (sdk path, etc)
20 | local.properties
21 |
22 | # Proguard folder generated by Eclipse
23 | proguard/
24 |
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/README.md:
--------------------------------------------------------------------------------
1 | StickyScrollView
2 | ========================
3 | 相信大家都知道有很多让ListView分组Header浮动悬停的开源控件，比如：**[StickyListHeaders](https://github.com/emilsjolander/StickyListHeaders)**、**[pinned-section-listview](https://github.com/beworker/pinned-section-listview)**,而本项目就是要在ScrollView中实现类似的功能。
4 | StickyScrollView 是一个让ScrollView同样支持浮动悬停的控件(该控件支持android2.2(api level 8)及以上的版本)。
5 | 效果图如下(gif屏幕录制，有点卡顿，实际使用不会的)：
6 | 
7 |
8 | 构建
9 | ----
10 | 该项目基于Eclipse构建。如果你使用的IDE是Eclipse，请：
11 | * 在Eclipse中菜单栏中选择 **File, Import, Existing projects into workspace...**
12 | * 选中你clone下来的repository的根目录，然后点击"import"导入项目（包括StickyScorllView 库项目和 StickyScrollViewSample示例项目）。
13 | * 导入之后如果有错误，请使用菜单栏中的 **Project - Clean** 清理下项目。
14 | * 在apk目录下有示例程序的[安装包](https://github.com/likebamboo/StickyScrollView/tree/master/apk)，你也可以先下载安装到手机看下效果。
15 |
16 | 使用方法
17 | ---------
18 |
19 | #### 布局文件：
20 |
21 | ``` xml
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86 | ```
87 |
88 |
89 | #### Activity
90 |
91 | ``` java
92 | // 初始化控件
93 | mStickyScrollView = (StickyScrollView)findViewById(R.id.scroll_view);
94 | mStickyView = (TextView)findViewById(R.id.sticky);
95 | mPlaceholderView = findViewById(R.id.placeholder);
96 |
97 |
98 | mCallbacks = new StickyScrollViewCallbacks(mStickyView, mPlaceholderView,
99 | mPlaceholderView2, mStickyScrollView);
100 |
101 | mStickyScrollView.addCallbacks(mCallbacks);
102 |
103 | mStickyScrollView.getViewTreeObserver().addOnGlobalLayoutListener(
104 | new StickyScrollViewGlobalLayoutListener(mCallbacks));
105 |
106 | ```
107 |
108 | 其他
109 | ------
110 | 在 [这里](https://github.com/emilsjolander/StickyScrollViewItems) 你可以找到与本项目具有相似功能的开源项目[StickyScrollViewItems](https://github.com/emilsjolander/StickyScrollViewItems)。
111 | 两个项目实现的功能是一样的，相比而言:
112 | * 本项目在使用的时候相对比较复杂，要写的代码会比较多，[StickyScrollViewItems](https://github.com/emilsjolander/StickyScrollViewItems) 项目使用起来比较简单。
113 | * 本项目支持子控件可悬停状态的动态切换，你可以在代码中通过设置``mCallbacks.setEnableSticky(!enableSticky);``来动态控制某个View是否悬停并且不影响其他子控件的悬停状态。
114 | * 本项目中可以方便的控制悬停控件的悬停范围,可控制悬停控件从哪个View到哪个View之前悬停,具体可参照 StickyScrollViewCallbacks 的第二个构造函数:
115 | ``` java
116 | // 不设置endView将一直悬停，直到ScrollView滚动到最底部
117 | public StickyScrollViewCallbacks(View stickyView, View placeholderView, View endView,StickyScrollView observableScrollView)
118 | ```
119 | * 其他
120 |
121 | 总之，两个项目各有优缺点，大家可以根据自己的喜好选择啦。
122 |
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/ScreenCapture/screen.gif:
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https://raw.githubusercontent.com/likebamboo/StickyScrollView/9819ca60e2bc2f6e386f46e7eab1165d98eec31c/ScreenCapture/screen.gif
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/apk/StickyScrollViewSample.apk:
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https://raw.githubusercontent.com/likebamboo/StickyScrollView/9819ca60e2bc2f6e386f46e7eab1165d98eec31c/apk/StickyScrollViewSample.apk
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/libarary/.classpath:
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/libarary/.project:
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3 | StickyScrollView
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6 |
7 |
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9 | com.android.ide.eclipse.adt.ResourceManagerBuilder
10 |
11 |
12 |
13 |
14 | com.android.ide.eclipse.adt.PreCompilerBuilder
15 |
16 |
17 |
18 |
19 | org.eclipse.jdt.core.javabuilder
20 |
21 |
22 |
23 |
24 | com.android.ide.eclipse.adt.ApkBuilder
25 |
26 |
27 |
28 |
29 |
30 | com.android.ide.eclipse.adt.AndroidNature
31 | org.eclipse.jdt.core.javanature
32 |
33 |
34 |
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/libarary/AndroidManifest.xml:
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10 |
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/libarary/proguard-project.txt:
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1 | # To enable ProGuard in your project, edit project.properties
2 | # to define the proguard.config property as described in that file.
3 | #
4 | # Add project specific ProGuard rules here.
5 | # By default, the flags in this file are appended to flags specified
6 | # in ${sdk.dir}/tools/proguard/proguard-android.txt
7 | # You can edit the include path and order by changing the ProGuard
8 | # include property in project.properties.
9 | #
10 | # For more details, see
11 | # http://developer.android.com/guide/developing/tools/proguard.html
12 |
13 | # Add any project specific keep options here:
14 |
15 | # If your project uses WebView with JS, uncomment the following
16 | # and specify the fully qualified class name to the JavaScript interface
17 | # class:
18 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
19 | # public *;
20 | #}
21 |
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/libarary/project.properties:
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1 | # This file is automatically generated by Android Tools.
2 | # Do not modify this file -- YOUR CHANGES WILL BE ERASED!
3 | #
4 | # This file must be checked in Version Control Systems.
5 | #
6 | # To customize properties used by the Ant build system edit
7 | # "ant.properties", and override values to adapt the script to your
8 | # project structure.
9 | #
10 | # To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
11 | #proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
12 |
13 | # Project target.
14 | target=android-17
15 | android.library=true
16 |
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/libarary/src/com/likebamboo/stickyscrollview/StickyScrollView.java:
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1 | /**
2 | * StickyScrollView.java
3 | * StickyScrollView
4 | *
5 | * Created by likebamboo on 2014-4-21
6 | * Copyright (c) 1998-2014 https://github.com/likebamboo All rights reserved.
7 | */
8 |
9 | package com.likebamboo.stickyscrollview;
10 |
11 | import android.content.Context;
12 | import android.util.AttributeSet;
13 | import android.view.MotionEvent;
14 | import android.widget.ScrollView;
15 |
16 | import java.util.ArrayList;
17 | import java.util.List;
18 |
19 | /**
20 | *
21 | * 自定义的ScrollView
22 | *
23 | * 通过监听ScrollView的滚动事件执行特定的回调方法【动态改变可浮动View的位置】
24 | *
25 | * @author likebamboo
26 | */
27 | public class StickyScrollView extends ScrollView {
28 | private List mCallbacks;
29 |
30 | // 滑动距离及坐标
31 | private float xDistance, yDistance, xLast, yLast;
32 |
33 | /**
34 | *
35 | * 复写onInterceptTouchEvent是用来解决ScrollView与ViewPager之前滚动事件冲突的，
36 | *
37 | * 实际项目可根据需要选择是否需要这段代码
38 | */
39 | @Override
40 | public boolean onInterceptTouchEvent(MotionEvent ev) {
41 | switch (ev.getAction()) {
42 | case MotionEvent.ACTION_DOWN:
43 | xDistance = yDistance = 0f;
44 | xLast = ev.getX();
45 | yLast = ev.getY();
46 | break;
47 | case MotionEvent.ACTION_MOVE:
48 | final float curX = ev.getX();
49 | final float curY = ev.getY();
50 |
51 | xDistance += Math.abs(curX - xLast);
52 | yDistance += Math.abs(curY - yLast);
53 | xLast = curX;
54 | yLast = curY;
55 |
56 | if (xDistance > yDistance) {
57 | return false;
58 | }
59 | }
60 | return super.onInterceptTouchEvent(ev);
61 | }
62 |
63 | public StickyScrollView(Context context, AttributeSet attrs) {
64 | super(context, attrs);
65 | }
66 |
67 | @Override
68 | protected void onScrollChanged(int l, int t, int oldl, int oldt) {
69 | super.onScrollChanged(l, t, oldl, oldt);
70 | // 滚动时回调
71 | if (mCallbacks != null && mCallbacks.size() != 0) {
72 | for (Callbacks item : mCallbacks) {
73 | item.onScrollChanged();
74 | }
75 | }
76 | }
77 |
78 | @Override
79 | public int computeVerticalScrollRange() {
80 | return super.computeVerticalScrollRange();
81 | }
82 |
83 | public void addCallbacks(Callbacks listener) {
84 | if (mCallbacks == null) {
85 | mCallbacks = new ArrayList();
86 | }
87 | mCallbacks.add(listener);
88 | }
89 |
90 | public static interface Callbacks {
91 | public void onScrollChanged();
92 | }
93 | }
94 |
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/libarary/src/com/likebamboo/stickyscrollview/StickyScrollViewCallbacks.java:
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1 | /**
2 | * StickyScrollViewCallbacks.java
3 | * StickyScrollView
4 | *
5 | * Created by likebamboo on 2014-4-21
6 | * Copyright (c) 1998-2014 https://github.com/likebamboo All rights reserved.
7 | */
8 |
9 | package com.likebamboo.stickyscrollview;
10 |
11 | import android.view.MotionEvent;
12 | import android.view.View;
13 |
14 | import com.likebamboo.stickyscrollview.animation.AnimatorProxy;
15 | import com.likebamboo.stickyscrollview.animation.ViewHelper;
16 |
17 | /**
18 | *
19 | * ScrollView滚动时的回调接口，
20 | *
21 | * 通过计算ScrollView滚动时悬停控件应该绘制的位置来绘制相应的View
22 | *
23 | * @author likebamboo
24 | */
25 | public class StickyScrollViewCallbacks implements StickyScrollView.Callbacks {
26 | private static final float CLICK_DISTANCE = 3;
27 |
28 | /**
29 | * 悬停的View
30 | */
31 | private View mStickyView = null;
32 |
33 | /**
34 | * 当mStickyView不处于悬浮状态时的停靠的View
35 | */
36 | private View mPlaceholderView = null;
37 |
38 | /**
39 | * ScrollView控件
40 | */
41 | private StickyScrollView mObservableScrollView = null;
42 |
43 | /**
44 | * 悬停控件的临界控件【非必须】，如果设置了该控件，当ScrollView滚动到该控件时，悬停控件会被这个控件顶出界面。
45 | */
46 | private View mEndSticyView;
47 |
48 | /**
49 | *
50 | */
51 | private boolean mEnableSticky = true;
52 |
53 | /**
54 | * touchDown时ScrollView滚动的坐标
55 | */
56 | private float mTouchDownY = Float.MIN_VALUE;
57 |
58 | /**
59 | * 从touchDown到touchUp,ScrollView滚动的距离
60 | */
61 | private float mScrollDistanceY = 0F;
62 |
63 | public StickyScrollViewCallbacks(View stickyView, View placeholderView,
64 | StickyScrollView observableScrollView) {
65 | this(stickyView, placeholderView, null, observableScrollView);
66 | }
67 |
68 | public StickyScrollViewCallbacks(View stickyView, View placeholderView, View endView,
69 | StickyScrollView observableScrollView) {
70 | this.mStickyView = stickyView;
71 | this.mPlaceholderView = placeholderView;
72 | this.mObservableScrollView = observableScrollView;
73 | this.mEndSticyView = endView;
74 | // 监听onTouch事件有两方面的考虑，scrollView的滚动与点击事件
75 | mStickyView.setOnTouchListener(new View.OnTouchListener() {
76 | @Override
77 | public boolean onTouch(View v, MotionEvent event) {
78 | switch (event.getAction()) {
79 | case MotionEvent.ACTION_DOWN:// 记录下当前的滚动位置
80 | mTouchDownY = mObservableScrollView.getScrollY();
81 | break;
82 | case MotionEvent.ACTION_MOVE:// ScrollView滚动的过程中，记录滚动的差值
83 | float disY = Math.abs(mObservableScrollView.getScrollY() - mTouchDownY);
84 | // 如果当前差值大于之前记录差值，将差值替换
85 | if (disY > mScrollDistanceY) {
86 | mScrollDistanceY = disY;
87 | }
88 | break;
89 | }
90 |
91 | float translateY = ViewHelper.getTranslationY(mStickyView);
92 | if (AnimatorProxy.NEEDS_PROXY) {
93 | translateY = getTop(mStickyView);
94 | }
95 |
96 | // touch的坐标都是相对于本控件的，所以需要做一次转换
97 | // 构建一个新的MotionEvent事件
98 | MotionEvent newEvent = MotionEvent.obtain(event);
99 | newEvent.setLocation(newEvent.getX(), newEvent.getY() + translateY);
100 | mObservableScrollView.dispatchTouchEvent(newEvent);
101 | if (newEvent != null) {
102 | newEvent.recycle();
103 | }
104 |
105 | // 如果是滚动，那么不让其触发onClick 事件
106 | if (mScrollDistanceY > CLICK_DISTANCE && event.getAction() == MotionEvent.ACTION_UP) {
107 | mScrollDistanceY = 0F;
108 | return true;
109 | }
110 | return false;
111 | }
112 | });
113 | }
114 |
115 | @Override
116 | public void onScrollChanged() {
117 | // 首先计算移动的距离
118 | int translationY = calTranslationY(mEnableSticky);
119 | // 移动
120 | translateY(translationY);
121 | }
122 |
123 | /**
124 | * 计算需要移动的位置
125 | *
126 | * @return
127 | */
128 | private int calTranslationY(boolean enableSticky) {
129 | // 如果不能浮动，那么固定在placeHolderView所在的位置
130 | if (!enableSticky) {
131 | return getTop(mPlaceholderView) - mObservableScrollView.getScrollY();
132 | }
133 | int translationY = Math.max(0,
134 | getTop(mPlaceholderView) - mObservableScrollView.getScrollY());
135 | if (mEndSticyView != null) {
136 | /**
137 | * 如果有滚动的临界区域 ，当滚动到指定的临界控件{mEndStricyView}之后，临界的控件将浮动顶上去(仿IOS效果)
138 | */
139 | if (mObservableScrollView.getScrollY() + mStickyView.getHeight() > getTop(mEndSticyView)) {
140 | // 如果临界控件已经将浮动控件完全顶出ScrollView，那么就让View固定在屏幕的上面
141 | if (mObservableScrollView.getScrollY() > getTop(mEndSticyView)) {
142 | translationY = -mStickyView.getHeight();
143 | } else {
144 | // 否则临界控件将其顶上去
145 | translationY = getTop(mEndSticyView) - mObservableScrollView.getScrollY()
146 | - mStickyView.getHeight();
147 | }
148 | }
149 | }
150 | return translationY;
151 | }
152 |
153 | /**
154 | * 获取控件顶部的坐标
155 | *
156 | * @return
157 | */
158 | private int getTop(View v) {
159 | return v.getTop();
160 | }
161 |
162 | /**
163 | * 设置是否允许悬停
164 | */
165 | public void setEnableSticky(boolean enable) {
166 | mEnableSticky = enable;
167 | onScrollChanged();
168 | }
169 |
170 | /**
171 | * 获取是否允许悬停
172 | */
173 | public boolean getEnableSticky() {
174 | return mEnableSticky;
175 | }
176 |
177 | /**
178 | * 将View移动到 position位置
179 | *
180 | * @param position
181 | */
182 | private void translateY(int position) {
183 | /**
184 | *
185 | * 针对2.3及以下版本，直接用layout方法改变其位置
186 | * 也许有人说，可以用[NineOldAndroids](https://github.com/JakeWharton/NineOldAndroids)兼容动画啊。
187 | * 可惜用NineOldAndroids动画执行后，控件的可点击区域还是在原来的地方啊【2.3及以下版本】。
188 | * github上好多人都报告了这个问题，但是没办法解决。这是android2.3及以下版本的系统问题，不是NineOldAndroids开源控件的问题
189 | * (之前我就是这么做的，发现不行后，才使用了layout方法，感兴趣的可以尝试下。)
190 | */
191 | if (AnimatorProxy.NEEDS_PROXY) {
192 | int l = mStickyView.getLeft();
193 | int r = mStickyView.getRight();
194 | mStickyView.layout(l, position, r, position + mStickyView.getHeight());
195 | } else {
196 | ViewHelper.setTranslationY(mStickyView, position);
197 | }
198 | }
199 | }
200 |
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/libarary/src/com/likebamboo/stickyscrollview/StickyScrollViewGlobalLayoutListener.java:
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1 | /**
2 | * StickyScrollViewGlobalLayoutListener.java
3 | * StickyScrollView
4 | *
5 | * Created by likebamboo on 2014-4-21
6 | * Copyright (c) 1998-2014 https://github.com/likebamboo All rights reserved.
7 | */
8 |
9 | package com.likebamboo.stickyscrollview;
10 |
11 | import android.view.ViewTreeObserver.OnGlobalLayoutListener;
12 |
13 | /**
14 | * 该接口主要用来接口当界面首次绘制时，让悬停控件处在正确的位置上。
15 | *
16 | * @author likebamboo
17 | */
18 | public class StickyScrollViewGlobalLayoutListener implements OnGlobalLayoutListener {
19 |
20 | private StickyScrollViewCallbacks mCallbacks;
21 |
22 | public StickyScrollViewGlobalLayoutListener(StickyScrollViewCallbacks mCallbacks) {
23 | this.mCallbacks = mCallbacks;
24 | }
25 |
26 | @Override
27 | public void onGlobalLayout() {
28 | mCallbacks.onScrollChanged();
29 | }
30 |
31 | }
32 |
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/libarary/src/com/likebamboo/stickyscrollview/animation/AnimatorProxy.java:
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1 | package com.likebamboo.stickyscrollview.animation;
2 |
3 | import android.graphics.Camera;
4 | import android.graphics.Matrix;
5 | import android.graphics.RectF;
6 | import android.os.Build;
7 | import android.view.View;
8 | import android.view.animation.Animation;
9 | import android.view.animation.Transformation;
10 |
11 | import java.lang.ref.WeakReference;
12 | import java.util.WeakHashMap;
13 |
14 | /**
15 | * A proxy class to allow for modifying post-3.0 view properties on all pre-3.0
16 | * platforms. DO NOT wrap your views with this class if you
17 | * are using {@code ObjectAnimator} as it will handle that itself.
18 | */
19 | public final class AnimatorProxy extends Animation {
20 | /** Whether or not the current running platform needs to be proxied. */
21 | public static final boolean NEEDS_PROXY = Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB;
22 |
23 | private static final WeakHashMap PROXIES = new WeakHashMap();
24 |
25 | /**
26 | * Create a proxy to allow for modifying post-3.0 view properties on all
27 | * pre-3.0 platforms. DO NOT wrap your views if you are
28 | * using {@code ObjectAnimator} as it will handle that itself.
29 | *
30 | * @param view View to wrap.
31 | * @return Proxy to post-3.0 properties.
32 | */
33 | public static AnimatorProxy wrap(View view) {
34 | AnimatorProxy proxy = PROXIES.get(view);
35 | // This checks if the proxy already exists and whether it still is the animation of the given view
36 | if (proxy == null || proxy != view.getAnimation()) {
37 | proxy = new AnimatorProxy(view);
38 | PROXIES.put(view, proxy);
39 | }
40 | return proxy;
41 | }
42 |
43 | private final WeakReference mView;
44 | private final Camera mCamera = new Camera();
45 | private boolean mHasPivot;
46 |
47 | private float mAlpha = 1;
48 | private float mPivotX;
49 | private float mPivotY;
50 | private float mRotationX;
51 | private float mRotationY;
52 | private float mRotationZ;
53 | private float mScaleX = 1;
54 | private float mScaleY = 1;
55 | private float mTranslationX;
56 | private float mTranslationY;
57 |
58 | private final RectF mBefore = new RectF();
59 | private final RectF mAfter = new RectF();
60 | private final Matrix mTempMatrix = new Matrix();
61 |
62 | private AnimatorProxy(View view) {
63 | setDuration(0); //perform transformation immediately
64 | setFillAfter(true); //persist transformation beyond duration
65 | view.setAnimation(this);
66 | mView = new WeakReference(view);
67 | }
68 |
69 | public float getTranslationY() {
70 | return mTranslationY;
71 | }
72 | public void setTranslationY(float translationY) {
73 | if (mTranslationY != translationY) {
74 | prepareForUpdate();
75 | mTranslationY = translationY;
76 | invalidateAfterUpdate();
77 | }
78 | }
79 |
80 | private void prepareForUpdate() {
81 | View view = mView.get();
82 | if (view != null) {
83 | computeRect(mBefore, view);
84 | }
85 | }
86 | private void invalidateAfterUpdate() {
87 | View view = mView.get();
88 | if (view == null || view.getParent() == null) {
89 | return;
90 | }
91 |
92 | final RectF after = mAfter;
93 | computeRect(after, view);
94 | after.union(mBefore);
95 |
96 | ((View)view.getParent()).invalidate(
97 | (int) Math.floor(after.left),
98 | (int) Math.floor(after.top),
99 | (int) Math.ceil(after.right),
100 | (int) Math.ceil(after.bottom));
101 | }
102 |
103 | private void computeRect(final RectF r, View view) {
104 | // compute current rectangle according to matrix transformation
105 | final float w = view.getWidth();
106 | final float h = view.getHeight();
107 |
108 | // use a rectangle at 0,0 to make sure we don't run into issues with scaling
109 | r.set(0, 0, w, h);
110 |
111 | final Matrix m = mTempMatrix;
112 | m.reset();
113 | transformMatrix(m, view);
114 | mTempMatrix.mapRect(r);
115 |
116 | r.offset(view.getLeft(), view.getTop());
117 |
118 | // Straighten coords if rotations flipped them
119 | if (r.right < r.left) {
120 | final float f = r.right;
121 | r.right = r.left;
122 | r.left = f;
123 | }
124 | if (r.bottom < r.top) {
125 | final float f = r.top;
126 | r.top = r.bottom;
127 | r.bottom = f;
128 | }
129 | }
130 |
131 | private void transformMatrix(Matrix m, View view) {
132 | final float w = view.getWidth();
133 | final float h = view.getHeight();
134 | final boolean hasPivot = mHasPivot;
135 | final float pX = hasPivot ? mPivotX : w / 2f;
136 | final float pY = hasPivot ? mPivotY : h / 2f;
137 |
138 | final float rX = mRotationX;
139 | final float rY = mRotationY;
140 | final float rZ = mRotationZ;
141 | if ((rX != 0) || (rY != 0) || (rZ != 0)) {
142 | final Camera camera = mCamera;
143 | camera.save();
144 | camera.rotateX(rX);
145 | camera.rotateY(rY);
146 | camera.rotateZ(-rZ);
147 | camera.getMatrix(m);
148 | camera.restore();
149 | m.preTranslate(-pX, -pY);
150 | m.postTranslate(pX, pY);
151 | }
152 |
153 | final float sX = mScaleX;
154 | final float sY = mScaleY;
155 | if ((sX != 1.0f) || (sY != 1.0f)) {
156 | m.postScale(sX, sY);
157 | final float sPX = -(pX / w) * ((sX * w) - w);
158 | final float sPY = -(pY / h) * ((sY * h) - h);
159 | m.postTranslate(sPX, sPY);
160 | }
161 |
162 | m.postTranslate(mTranslationX, mTranslationY);
163 | }
164 |
165 | @Override
166 | protected void applyTransformation(float interpolatedTime, Transformation t) {
167 | View view = mView.get();
168 | if (view != null) {
169 | t.setAlpha(mAlpha);
170 | transformMatrix(t.getMatrix(), view);
171 | }
172 | }
173 | }
174 |
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/libarary/src/com/likebamboo/stickyscrollview/animation/ViewHelper.java:
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1 | /**
2 | * ViewHelper.java
3 | * StickyScrollView
4 | *
5 | * Created by likebamboo on 2014-4-21
6 | * Copyright (c) 1998-2014 https://github.com/likebamboo All rights reserved.
7 | */
8 |
9 | package com.likebamboo.stickyscrollview.animation;
10 |
11 | import android.annotation.SuppressLint;
12 | import android.view.View;
13 |
14 | import static com.likebamboo.stickyscrollview.animation.AnimatorProxy.NEEDS_PROXY;
15 | import static com.likebamboo.stickyscrollview.animation.AnimatorProxy.wrap;
16 |
17 | /**
18 | * 动画代理，来源于NineOldAndroids
19 | *
20 | * @author likebamboo
21 | */
22 | public final class ViewHelper {
23 | private ViewHelper() {
24 | }
25 |
26 | public static float getTranslationY(View view) {
27 | return NEEDS_PROXY ? wrap(view).getTranslationY() : Honeycomb.getTranslationY(view);
28 | }
29 |
30 | public static void setTranslationY(View view, float translationY) {
31 | if (NEEDS_PROXY) {
32 | wrap(view).setTranslationY(translationY);
33 | } else {
34 | Honeycomb.setTranslationY(view, translationY);
35 | }
36 | }
37 |
38 | @SuppressLint("NewApi")
39 | private static final class Honeycomb {
40 | static float getTranslationY(View view) {
41 | return view.getTranslationY();
42 | }
43 |
44 | static void setTranslationY(View view, float translationY) {
45 | view.setTranslationY(translationY);
46 | }
47 | }
48 | }
49 |
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/sample/.classpath:
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/sample/.project:
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3 | StickyScrollViewSample
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6 |
7 |
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9 | com.android.ide.eclipse.adt.ResourceManagerBuilder
10 |
11 |
12 |
13 |
14 | com.android.ide.eclipse.adt.PreCompilerBuilder
15 |
16 |
17 |
18 |
19 | org.eclipse.jdt.core.javabuilder
20 |
21 |
22 |
23 |
24 | com.android.ide.eclipse.adt.ApkBuilder
25 |
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29 |
30 | com.android.ide.eclipse.adt.AndroidNature
31 | org.eclipse.jdt.core.javanature
32 |
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34 |
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/sample/AndroidManifest.xml:
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/sample/proguard-project.txt:
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1 | # To enable ProGuard in your project, edit project.properties
2 | # to define the proguard.config property as described in that file.
3 | #
4 | # Add project specific ProGuard rules here.
5 | # By default, the flags in this file are appended to flags specified
6 | # in ${sdk.dir}/tools/proguard/proguard-android.txt
7 | # You can edit the include path and order by changing the ProGuard
8 | # include property in project.properties.
9 | #
10 | # For more details, see
11 | # http://developer.android.com/guide/developing/tools/proguard.html
12 |
13 | # Add any project specific keep options here:
14 |
15 | # If your project uses WebView with JS, uncomment the following
16 | # and specify the fully qualified class name to the JavaScript interface
17 | # class:
18 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
19 | # public *;
20 | #}
21 |
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/sample/project.properties:
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1 | # This file is automatically generated by Android Tools.
2 | # Do not modify this file -- YOUR CHANGES WILL BE ERASED!
3 | #
4 | # This file must be checked in Version Control Systems.
5 | #
6 | # To customize properties used by the Ant build system edit
7 | # "ant.properties", and override values to adapt the script to your
8 | # project structure.
9 | #
10 | # To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
11 | #proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
12 |
13 | # Project target.
14 | target=android-17
15 | android.library.reference.1=../libarary
16 |
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/sample/res/drawable-hdpi/ic_launcher.png:
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https://raw.githubusercontent.com/likebamboo/StickyScrollView/9819ca60e2bc2f6e386f46e7eab1165d98eec31c/sample/res/drawable-hdpi/ic_launcher.png
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/sample/res/drawable-mdpi/ic_launcher.png:
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https://raw.githubusercontent.com/likebamboo/StickyScrollView/9819ca60e2bc2f6e386f46e7eab1165d98eec31c/sample/res/drawable-mdpi/ic_launcher.png
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/sample/res/drawable-xhdpi/ic_launcher.png:
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https://raw.githubusercontent.com/likebamboo/StickyScrollView/9819ca60e2bc2f6e386f46e7eab1165d98eec31c/sample/res/drawable-xhdpi/ic_launcher.png
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/sample/res/values/colors.xml:
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/sample/res/values/dimens.xml:
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4 | 16dp
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/sample/res/values/id.xml:
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