Android开发实现qqminihd 左右滑动菜单效果

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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：

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：

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：

 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~