android 自己实现qqminihd 左右滑动菜单效果

观察qqminihd界面，发现其界面能够左右滑动来实现两侧菜单效果。

自定义Layout:ScrollLayout.java

直接贴出代码：

View Code

  1 package grimbo.android.demo.slidingmenu;
  2 
  3 import android.content.Context;
  4 import android.util.AttributeSet;
  5 import android.util.Log;
  6 import android.view.GestureDetector;
  7 import android.view.GestureDetector.OnGestureListener;
  8 import android.view.MotionEvent;
  9 import android.view.View;
 10 import android.view.ViewConfiguration;
 11 import android.view.animation.AnimationUtils;
 12 import android.widget.LinearLayout;
 13 import android.widget.Scroller;
 14 
 15 public class ScrollLayout extends LinearLayout {
 16 
 17 //    private static final String TAG = "scroller";
 18 
 19     private Scroller scroller;
 20 
 21     private int currentScreenIndex;
 22 
 23     private GestureDetector gestureDetector;
 24 
 25     // 设置一个标志位，防止底层的onTouch事件重复处理UP事件
 26     private boolean fling;
 27 
 28     /**
 29      * 菜单栏的宽度
 30      */
 31     int menuWidth=80;
 32     
 33     /**
 34      * 显示左边菜单
 35      * 否则显示右边菜单
 36      */
 37     private boolean showLeft=true;
 38     
 39     /**
 40      * 滚出边界监听器
 41      */
 42     private OnScrollSideChangedListener scrollSideChangedListener;
 43     
 44     public Scroller getScroller() {
 45             return scroller;
 46     }
 47 
 48     public OnScrollSideChangedListener getScrollSideChangedListener() {
 49         return scrollSideChangedListener;
 50     }
 51 
 52     public void setScrollSideChangedListener(
 53             OnScrollSideChangedListener scrollSideChangedListener) {
 54         this.scrollSideChangedListener = scrollSideChangedListener;
 55     }
 56 
 57     public ScrollLayout(Context context, AttributeSet attrs) {
 58             super(context, attrs);
 59             initView(context);
 60     }
 61 
 62     public ScrollLayout(Context context) {
 63             super(context);
 64             initView(context);
 65     }
 66 
 67     private void initView(final Context context) {
 68             this.scroller = new Scroller(context,AnimationUtils.loadInterpolator(context,
 69                     android.R.anim.overshoot_interpolator));
 70 
 71             this.gestureDetector = new GestureDetector(new OnGestureListener() {
 72 
 73                     @Override
 74                     public boolean onSingleTapUp(MotionEvent e) {
 75                             return false;
 76                     }
 77 
 78                     @Override
 79                     public void onShowPress(MotionEvent e) {
 80                     }
 81 
 82                     @Override
 83                     public boolean onScroll(MotionEvent e1, MotionEvent e2,
 84                                     float distanceX, float distanceY) {
 85 
 86                             {// 防止向第一页之前移动
 87                                 if(1==currentScreenIndex)
 88                                 {
 89                                     int screenLeft=getWidth()-menuWidth;
 90                                     if(showLeft && getScrollX()>screenLeft)
 91                                     {
 92                                         showLeft=false;
 93 //                                        Log.e("TAG","显示右边菜单栏");
 94                                         if(null!=scrollSideChangedListener)
 95                                             scrollSideChangedListener.onScrollSideChanged(ScrollLayout.this, showLeft);
 96                                     }
 97                                     else if(!showLeft && getScrollX()<screenLeft)
 98                                     {
 99                                         showLeft=true;
100 //                                        Log.e("TAG","显示左边菜单栏");
101                                         if(null!=scrollSideChangedListener)
102                                             scrollSideChangedListener.onScrollSideChanged(ScrollLayout.this, showLeft);
103                                     }
104                                 }
105                                 
106                                     fling = true;
107                                     scrollBy((int) distanceX, 0);
108 //                                    Log.d("TAG", "on scroll>>>>>>>>>>>>>>>>>移动<<<<<<<<<<<<<<>>>");
109                             }
110                             return true;
111                     }
112 
113                     @Override
114                     public void onLongPress(MotionEvent e) {
115                     }
116 
117                     @Override
118                     public boolean onFling(MotionEvent e1, MotionEvent e2,
119                                     float velocityX, float velocityY) {
120                         
121                             if (Math.abs(velocityX) > ViewConfiguration.get(context)
122                                             .getScaledMinimumFlingVelocity()) 
123                             {// 判断是否达到最小轻松速度，取绝对值的
124                                 fling = true;
125                                 snapToDestination();
126 //                                Log.d(TAG, "on scroll>>>>>>>>>>>>>>>>>滑动<<<<<<<<<<<<<<>>>");
127                             }
128 
129                             return true;
130                     }
131 
132                     @Override
133                     public boolean onDown(MotionEvent e) {
134                             return false;
135                     }
136             });
137             
138     }
139     //每一个屏的边界值
140     //0----[getWidth()-20]----[2*getWidth()-20]-----[3*getWidth()-40]
141     
142     
143     @Override
144     protected void onLayout(boolean changed, int left, int top, int right,
145                     int bottom) {
146             /**
147              * 设置布局，将子视图顺序横屏排列
148              */
149             super.onLayout(changed, left, top, right, bottom);
150             int move=getWidth()-menuWidth;
151             for (int i = 0; i < getChildCount(); i++) 
152             {
153                     View child = getChildAt(i);
154 //                    child.setVisibility(View.VISIBLE);
155                     //移动一定的距离
156                     child.layout(child.getLeft()+move,child.getTop(),child.getRight()+move,child.getBottom());
157             }
158     }
159 
160     @Override
161     public void computeScroll() {
162             if (scroller.computeScrollOffset()) {
163 //                    Log.d(TAG, ">>>>>>>>>>computeScroll>>>>>"+scroller.getCurrX());
164                     scrollTo(scroller.getCurrX(), 0);
165                     postInvalidate();
166             }
167     }
168 
169     @Override
170     public boolean onTouchEvent(MotionEvent event) {
171             
172             float x2s=getScrollX()+event.getX();
173             
174             if(x2s<getWidth()-menuWidth || x2s>2*getWidth()-menuWidth)
175             {//动作在区域外面
176                 if(!fling)//没有在滑动
177                 {
178 //                    Log.d(TAG, "on scroll>>>>>>>>>>>>>>>>>动作在区域外面 没有在滑动<<<<<<<<<<<<<<>>>");
179                     return false;
180                 }
181                 else if(MotionEvent.ACTION_UP!=event.getAction())
182                 {//否则如果也不是抬起手势，则强制模拟抬起
183                     snapToDestination();
184                     fling = false;
185 //                    Log.d(TAG, "on scroll>>>>>>>>>>>>>>>>>动作在区域外面 在滑动 也不是抬起手势<<<<<<<<<<<<<<>>>");
186                     return false;
187                 }
188 //                Log.e(TAG, "on scroll>>>>>>>>>>>>>>>>>动作在区域外面 在滑动 是抬起手势<<<<<<<<<<<<<<>>>");
189             }
190             
191             gestureDetector.onTouchEvent(event);
192 
193             switch (event.getAction()) {
194             case MotionEvent.ACTION_DOWN:
195                     break;
196             case MotionEvent.ACTION_MOVE:
197                     break;
198             case MotionEvent.ACTION_UP:
199 //                    Log.d(TAG, ">>ACTION_UP:>>>>>>>> MotionEvent.ACTION_UP>>>>>");
200 //                    if (!fling) 
201                     {
202                             snapToDestination();
203                     }
204                     fling = false;
205                     break;
206             default:
207                     break;
208             }
209             return true;
210     }
211 
212     /**
213      * 切换到指定屏
214      * 
215      * @param whichScreen
216      */
217     public void scrollToScreen(int whichScreen) {
218             if (getFocusedChild() != null && whichScreen != currentScreenIndex
219                             && getFocusedChild() == getChildAt(currentScreenIndex)) {
220                     getFocusedChild().clearFocus();
221             }
222             int delta = 0;
223             
224             if(whichScreen==0)
225                 delta= - getScrollX();
226             else if(whichScreen==1)
227                 delta= getWidth()-menuWidth- getScrollX();
228             else if(whichScreen==2)
229                 delta= 2*(getWidth()-menuWidth)- getScrollX();
230             else
231                 return;
232 //                delta = whichScreen * getWidth() - getScrollX();
233             
234             scroller.startScroll(getScrollX(), 0, delta, 0, Math.abs(delta) * 2);
235             invalidate();
236 
237             currentScreenIndex = whichScreen;
238     }
239 
240     /**
241      * 根据当前x坐标位置确定切换到第几屏
242      */
243     private void snapToDestination() {
244         
245         if(getScrollX()<(getWidth()-menuWidth)/2)
246             scrollToScreen(0);
247         else if(getScrollX()<(getWidth()-menuWidth+getWidth()/2))
248             scrollToScreen(1);
249         else
250             scrollToScreen(2);
251     }
252 
253     public interface OnScrollSideChangedListener
254     {
255         public void onScrollSideChanged(View v,boolean leftSide);
256     }
257 }

接下来，在定义activity里面的布局my_layout.xml：

View Code

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:app="http://schemas.android.com/apk/res/grimbo.android.demo.slidingmenu"
 4     android:id="@+id/FrameLayout1"
 5     android:layout_width="match_parent"
 6     android:layout_height="match_parent" >
 7     <LinearLayout
 8         android:layout_width="match_parent"
 9         android:layout_height="match_parent"
10         android:id="@+id/left_menu"
11         android:background="#333"
12         android:orientation="vertical" >
13 
14         <Button
15             android:layout_width="200dp"
16             android:layout_height="wrap_content"
17             android:text="左菜单一" />
18         <Button
19             android:layout_width="200dp"
20             android:layout_height="wrap_content"
21             android:text="左菜单二" />
22     </LinearLayout>
23 
24     <LinearLayout
25         android:id="@+id/right_menu"
26         android:layout_width="match_parent"
27         android:layout_height="match_parent"
28         android:background="#666"
29         android:orientation="horizontal" >
30         <LinearLayout
31             android:layout_width="wrap_content"
32             android:layout_height="wrap_content"
33             android:layout_weight="1"
34             android:orientation="vertical" >
35         </LinearLayout>
36         <LinearLayout
37             android:layout_width="200dp"
38             android:layout_height="wrap_content"
39             android:orientation="vertical" >
40             <Button
41                 android:layout_width="match_parent"
42                 android:layout_height="wrap_content"
43                 android:text="右菜单一" />
44             <Button
45                 android:layout_width="match_parent"
46                 android:layout_height="wrap_content"
47                 android:text="右菜单二" />
48             
49         </LinearLayout>
50         
51     </LinearLayout>
52     <grimbo.android.demo.slidingmenu.ScrollLayout
53         android:layout_width="match_parent"
54         android:orientation="vertical"
55         android:id="@+id/my_scrollLayout"
56         android:layout_height="match_parent">
57         <LinearLayout
58             android:layout_width="match_parent"
59             android:layout_height="match_parent"
60             android:background="#aaa"
61             android:orientation="vertical" >
62 
63 
64             <Button
65                 android:id="@+id/button1"
66                 android:layout_width="match_parent"
67                 android:layout_height="wrap_content"
68                 android:text="Button Button" />
69 
70             <Spinner
71                 android:id="@+id/spinner1"
72                 android:layout_width="match_parent"
73                 android:layout_height="wrap_content" />
74 
75             <SeekBar
76                 android:id="@+id/seekBar1"
77                 android:layout_width="match_parent"
78                 android:layout_height="wrap_content" />
79             
80         </LinearLayout>
81 
82     </grimbo.android.demo.slidingmenu.ScrollLayout>
83     
84 </FrameLayout>

最后，在activity里面的onCreate函数里加上：

View Code

 1 setContentView(R.layout.my_layout);
 2         
 3         final LinearLayout left=(LinearLayout)findViewById(R.id.left_menu);
 4         final LinearLayout right=(LinearLayout)findViewById(R.id.right_menu);
 5         right.setVisibility(View.GONE);
 6         left.setVisibility(View.VISIBLE);
 7         
 8         ScrollLayout mScrollLayout=(ScrollLayout)findViewById(R.id.my_scrollLayout);
 9         mScrollLayout.setScrollSideChangedListener(new OnScrollSideChangedListener() {
10             @Override
11             public void onScrollSideChanged(View v, boolean leftSide) {
12                 if(leftSide)
13                 {
14                     right.setVisibility(View.GONE);
15                     left.setVisibility(View.VISIBLE);
16                 }else
17                 {
18                     right.setVisibility(View.VISIBLE);
19                     left.setVisibility(View.GONE);
20                 }
21             }
22         });

大功告成！左右滑动是弹性效果也一并实现~

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