├── .gitignore
├── README.md
├── app
├── .gitignore
├── build.gradle
├── proguard-rules.pro
└── src
│ ├── androidTest
│ └── java
│ │ └── com
│ │ └── zh
│ │ └── android
│ │ └── floatbutton
│ │ └── ExampleInstrumentedTest.java
│ ├── main
│ ├── AndroidManifest.xml
│ ├── java
│ │ └── com
│ │ │ └── zh
│ │ │ └── android
│ │ │ └── floatbutton
│ │ │ ├── MainActivity.java
│ │ │ ├── NewYearActivity.java
│ │ │ └── weiget
│ │ │ └── FloatButtonLayout.java
│ └── res
│ │ ├── drawable-v24
│ │ └── ic_launcher_foreground.xml
│ │ ├── drawable
│ │ └── ic_launcher_background.xml
│ │ ├── layout
│ │ ├── activity_main.xml
│ │ └── activity_new_year.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
│ │ ├── mipmap-xxhdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-xxxhdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ └── values
│ │ ├── colors.xml
│ │ ├── ids.xml
│ │ ├── strings.xml
│ │ └── styles.xml
│ └── test
│ └── java
│ └── com
│ └── zh
│ └── android
│ └── floatbutton
│ └── ExampleUnitTest.java
├── build.gradle
├── gradle.properties
├── gradle
└── wrapper
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
├── gradlew
├── gradlew.bat
└── settings.gradle
/.gitignore:
--------------------------------------------------------------------------------
1 | *.iml
2 | .gradle
3 | /local.properties
4 | /.idea/caches
5 | /.idea/libraries
6 | /.idea/modules.xml
7 | /.idea/workspace.xml
8 | /.idea/navEditor.xml
9 | /.idea/assetWizardSettings.xml
10 | .DS_Store
11 | /build
12 | /captures
13 | .externalNativeBuild
14 | .cxx
15 |
16 | /.idea
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # FloatButton
2 | 浮动按钮，可用于活动悬浮按钮。
3 |
--------------------------------------------------------------------------------
/app/.gitignore:
--------------------------------------------------------------------------------
1 | /build
2 |
--------------------------------------------------------------------------------
/app/build.gradle:
--------------------------------------------------------------------------------
1 | apply plugin: 'com.android.application'
2 |
3 | android {
4 | compileSdkVersion 29
5 | buildToolsVersion "29.0.2"
6 | defaultConfig {
7 | applicationId "com.zh.android.floatbutton"
8 | minSdkVersion 21
9 | targetSdkVersion 29
10 | versionCode 1
11 | versionName "1.0"
12 | testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
13 | }
14 | buildTypes {
15 | release {
16 | minifyEnabled false
17 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
18 | }
19 | }
20 | }
21 |
22 | dependencies {
23 | implementation fileTree(dir: 'libs', include: ['*.jar'])
24 | implementation 'androidx.appcompat:appcompat:1.1.0'
25 | implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
26 | testImplementation 'junit:junit:4.12'
27 | androidTestImplementation 'androidx.test.ext:junit:1.1.1'
28 | androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
29 | }
30 |
--------------------------------------------------------------------------------
/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/zh/android/floatbutton/ExampleInstrumentedTest.java:
--------------------------------------------------------------------------------
1 | package com.zh.android.floatbutton;
2 |
3 | import android.content.Context;
4 |
5 | import androidx.test.platform.app.InstrumentationRegistry;
6 | import androidx.test.ext.junit.runners.AndroidJUnit4;
7 |
8 | import org.junit.Test;
9 | import org.junit.runner.RunWith;
10 |
11 | import static org.junit.Assert.*;
12 |
13 | /**
14 | * Instrumented test, which will execute on an Android device.
15 | *
16 | * @see Testing documentation
17 | */
18 | @RunWith(AndroidJUnit4.class)
19 | public class ExampleInstrumentedTest {
20 | @Test
21 | public void useAppContext() {
22 | // Context of the app under test.
23 | Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
24 |
25 | assertEquals("com.zh.android.floatbutton", appContext.getPackageName());
26 | }
27 | }
28 |
--------------------------------------------------------------------------------
/app/src/main/AndroidManifest.xml:
--------------------------------------------------------------------------------
1 |
2 |
4 |
5 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
--------------------------------------------------------------------------------
/app/src/main/java/com/zh/android/floatbutton/MainActivity.java:
--------------------------------------------------------------------------------
1 | package com.zh.android.floatbutton;
2 |
3 | import android.content.Intent;
4 | import android.os.Bundle;
5 |
6 | import androidx.appcompat.app.AppCompatActivity;
7 |
8 | import com.zh.android.floatbutton.weiget.FloatButtonLayout;
9 |
10 | /**
11 | * Package: com.zh.android.floatbutton
12 | * Create Date: 2019-12-24 15:03
13 | * @author: zihe
14 | * Description:
15 | */
16 | public class MainActivity extends AppCompatActivity {
17 | @Override
18 | protected void onCreate(Bundle savedInstanceState) {
19 | super.onCreate(savedInstanceState);
20 | setContentView(R.layout.activity_main);
21 | FloatButtonLayout floatButton = findViewById(R.id.float_button_layout);
22 | //设置点击事件
23 | floatButton.setCallback(new FloatButtonLayout.Callback() {
24 | @Override
25 | public void onClickFloatButton() {
26 | startActivity(new Intent(MainActivity.this, NewYearActivity.class));
27 | }
28 | });
29 | }
30 | }
--------------------------------------------------------------------------------
/app/src/main/java/com/zh/android/floatbutton/NewYearActivity.java:
--------------------------------------------------------------------------------
1 | package com.zh.android.floatbutton;
2 |
3 | import android.os.Bundle;
4 | import android.view.MenuItem;
5 |
6 | import androidx.annotation.NonNull;
7 | import androidx.annotation.Nullable;
8 | import androidx.appcompat.app.ActionBar;
9 | import androidx.appcompat.app.AppCompatActivity;
10 |
11 | /**
12 | * Package: com.zh.android.floatbutton
13 | * Create Date: 2019-12-24 17:21
14 | * @author: zihe
15 | * Description: 新年活动页面
16 | */
17 | public class NewYearActivity extends AppCompatActivity {
18 | @Override
19 | protected void onCreate(@Nullable Bundle savedInstanceState) {
20 | super.onCreate(savedInstanceState);
21 | setContentView(R.layout.activity_new_year);
22 | ActionBar actionBar = getSupportActionBar();
23 | //显示返回键
24 | actionBar.setDisplayHomeAsUpEnabled(true);
25 | //隐藏图标
26 | actionBar.setDisplayShowHomeEnabled(false);
27 | }
28 |
29 | @Override
30 | public boolean onOptionsItemSelected(@NonNull MenuItem item) {
31 | switch (item.getItemId()) {
32 | case android.R.id.home:
33 | this.finish();
34 | return false;
35 | default:
36 | return super.onOptionsItemSelected(item);
37 | }
38 | }
39 | }
--------------------------------------------------------------------------------
/app/src/main/java/com/zh/android/floatbutton/weiget/FloatButtonLayout.java:
--------------------------------------------------------------------------------
1 | package com.zh.android.floatbutton.weiget;
2 |
3 | import android.content.Context;
4 | import android.graphics.PointF;
5 | import android.util.AttributeSet;
6 | import android.view.MotionEvent;
7 | import android.view.View;
8 | import android.widget.FrameLayout;
9 |
10 | import androidx.annotation.NonNull;
11 | import androidx.annotation.Nullable;
12 | import androidx.customview.widget.ViewDragHelper;
13 |
14 | import com.zh.android.floatbutton.R;
15 |
16 | /**
17 | * Package: com.zh.android.floatbutton.weiget
18 | * Create Date: 2019-12-24 15:03
19 | * @author: zihe
20 | * Description: 浮动拽托按钮布局
21 | */
22 | public class FloatButtonLayout extends FrameLayout {
23 | /**
24 | * 可拽托按钮
25 | */
26 | private View mFloatButton;
27 | /**
28 | * 拽托帮助类
29 | */
30 | private ViewDragHelper mViewDragHelper;
31 | /**
32 | * 回调
33 | */
34 | private Callback mCallback;
35 |
36 | public FloatButtonLayout(@NonNull Context context) {
37 | this(context, null);
38 | }
39 |
40 | public FloatButtonLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
41 | this(context, attrs, 0);
42 | }
43 |
44 | public FloatButtonLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
45 | super(context, attrs, defStyleAttr);
46 | init(context, attrs, defStyleAttr);
47 | }
48 |
49 | private void init(Context context, AttributeSet attrs, int defStyleAttr) {
50 | mViewDragHelper = ViewDragHelper.create(this, 0.3f, new ViewDragHelper.Callback() {
51 | /**
52 | * 开始拽托时的X坐标
53 | */
54 | private int mDownX;
55 | /**
56 | * 开始拽托时的Y坐标
57 | */
58 | private int mDownY;
59 | /**
60 | * 开始拽托时的时间
61 | */
62 | private long mDownTime;
63 |
64 | @Override
65 | public boolean tryCaptureView(@NonNull View child, int pointerId) {
66 | return child == mFloatButton;
67 | }
68 |
69 | @Override
70 | public int clampViewPositionHorizontal(@NonNull View child, int left, int dx) {
71 | //限制左右移动的返回，不能超过父控件
72 | int leftBound = getPaddingStart();
73 | int rightBound = getMeasuredWidth() - getPaddingEnd() - child.getWidth();
74 | if (left < leftBound) {
75 | return leftBound;
76 | }
77 | if (left > rightBound) {
78 | return rightBound;
79 | }
80 | return left;
81 | }
82 |
83 | @Override
84 | public int clampViewPositionVertical(@NonNull View child, int top, int dy) {
85 | //限制上下移动的返回，不能超过父控件
86 | int topBound = getPaddingTop();
87 | int bottomBound = getMeasuredHeight() - getPaddingBottom() - child.getHeight();
88 | if (top < topBound) {
89 | return topBound;
90 | }
91 | if (top > bottomBound) {
92 | return bottomBound;
93 | }
94 | return top;
95 | }
96 |
97 | @Override
98 | public int getViewHorizontalDragRange(@NonNull View child) {
99 | return getMeasuredWidth() - getPaddingStart() - getPaddingEnd() - child.getWidth();
100 | }
101 |
102 | @Override
103 | public int getViewVerticalDragRange(@NonNull View child) {
104 | return getMeasuredHeight() - getPaddingTop() - getPaddingBottom() - child.getHeight();
105 | }
106 |
107 | @Override
108 | public void onViewCaptured(@NonNull View capturedChild, int activePointerId) {
109 | super.onViewCaptured(capturedChild, activePointerId);
110 | mDownX = capturedChild.getLeft();
111 | mDownY = capturedChild.getTop();
112 | mDownTime = System.currentTimeMillis();
113 | }
114 |
115 | @Override
116 | public void onViewReleased(@NonNull final View releasedChild, float xvel, float yvel) {
117 | super.onViewReleased(releasedChild, xvel, yvel);
118 | //松手回弹，判断如果松手位置，近左边还是右边，进行弹性滑动
119 | int fullWidth = getMeasuredWidth();
120 | final int halfWidth = fullWidth / 2;
121 | final int currentLeft = releasedChild.getLeft();
122 | final int currentTop = releasedChild.getTop();
123 | //滚动到左边
124 | final Runnable scrollToLeft = new Runnable() {
125 | @Override
126 | public void run() {
127 | mViewDragHelper.settleCapturedViewAt(getPaddingStart(), currentTop);
128 | }
129 | };
130 | //滚动到右边
131 | final Runnable scrollToRight = new Runnable() {
132 | @Override
133 | public void run() {
134 | int endX = getMeasuredWidth() - getPaddingEnd() - releasedChild.getWidth();
135 | mViewDragHelper.settleCapturedViewAt(endX, currentTop);
136 | }
137 | };
138 | Runnable checkDirection = new Runnable() {
139 | @Override
140 | public void run() {
141 | if (currentLeft < halfWidth) {
142 | //在屏幕一半的左边，回弹回左边
143 | scrollToLeft.run();
144 | } else {
145 | //在屏幕一半的右边，回弹回右边
146 | scrollToRight.run();
147 | }
148 | }
149 | };
150 | //最小移动距离
151 | int minMoveDistance = fullWidth / 3;
152 | //计算移动距离
153 | int distanceX = currentLeft - mDownX;
154 | int distanceY = currentTop - mDownY;
155 | long upTime = System.currentTimeMillis();
156 | //间隔时间
157 | long intervalTime = upTime - mDownTime;
158 | float touched = getDistanceBetween2Points(new PointF(mDownX, mDownY), new PointF(currentLeft, currentTop));
159 | //处理点击事件，移动距离小于识别为移动的距离，并且时间小于400
160 | if (touched < mViewDragHelper.getTouchSlop() && intervalTime < 300) {
161 | if (mCallback != null) {
162 | mCallback.onClickFloatButton();
163 | }
164 | //因为判断为点击事件后，return就会让按钮不进行贴边回弹了，这里再添加处理，让可以贴边回弹
165 | checkDirection.run();
166 | return;
167 | }
168 | //判断上下滑还是左右滑
169 | if (Math.abs(distanceX) > Math.abs(distanceY)) {
170 | //左右滑，滑动得少，并且速度很快，则为fling操作
171 | if (Math.abs(distanceX) < minMoveDistance &&
172 | Math.abs(xvel) > Math.abs(mViewDragHelper.getMinVelocity())) {
173 | //距离相减为正数，则为往右滑
174 | if (distanceX > 0) {
175 | scrollToRight.run();
176 | } else {
177 | //否则为往左
178 | scrollToLeft.run();
179 | }
180 | } else {
181 | //不是fling操作，判断松手位置在屏幕左边还是右边
182 | checkDirection.run();
183 | }
184 | } else {
185 | //上下滑，主要是判断在屏幕左还是屏幕右，不需要判断fling
186 | checkDirection.run();
187 | }
188 | invalidate();
189 | }
190 | });
191 | }
192 |
193 | @Override
194 | public boolean onInterceptTouchEvent(MotionEvent ev) {
195 | return mViewDragHelper.shouldInterceptTouchEvent(ev);
196 | }
197 |
198 | @Override
199 | public boolean onTouchEvent(MotionEvent event) {
200 | mViewDragHelper.processTouchEvent(event);
201 | return true;
202 | }
203 |
204 | @Override
205 | public void computeScroll() {
206 | super.computeScroll();
207 | if (mViewDragHelper != null && mViewDragHelper.continueSettling(true)) {
208 | invalidate();
209 | }
210 | }
211 |
212 | @Override
213 | protected void onFinishInflate() {
214 | super.onFinishInflate();
215 | mFloatButton = findViewById(R.id.float_button);
216 | if (mFloatButton == null) {
217 | throw new NullPointerException("必须要有一个可拽托按钮");
218 | }
219 | }
220 |
221 | /**
222 | * 获得两点之间的距离
223 | */
224 | public static float getDistanceBetween2Points(PointF p0, PointF p1) {
225 | return (float) Math.sqrt(Math.pow(p0.y - p1.y, 2) + Math.pow(p0.x - p1.x, 2));
226 | }
227 |
228 | public interface Callback {
229 | /**
230 | * 点击时回调
231 | */
232 | void onClickFloatButton();
233 | }
234 |
235 | public void setCallback(Callback callback) {
236 | mCallback = callback;
237 | }
238 | }
--------------------------------------------------------------------------------
/app/src/main/res/drawable-v24/ic_launcher_foreground.xml:
--------------------------------------------------------------------------------
1 |
7 |
12 |
13 |
19 |