效果：
其实就是利用监听手势。将主页面滑开。将下面一层布局的菜单展露出来。下面是布局文件。
<RelativeLayout xmlns:android="/apk/res/android"xmlns:tools="/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity" ><LinearLayoutandroid:id="@+id/listMenu"android:layout_width="50dp"android:layout_height="match_parent"android:layout_alignParentBottom="true"android:layout_alignParentRight="true"android:layout_alignParentTop="true"android:background="@drawable/f_1"android:orientation="vertical" ></LinearLayout><RelativeLayoutandroid:id="@+id/content"android:layout_width="match_parent"android:layout_height="match_parent"android:background="@drawable/back"></RelativeLayout></RelativeLayout>
利用OnGestureListener 去监听手势的变化。，当然，其实后面发现大可不必。直接在OnTouch里面写就好。更简单。记录Down的位置，之后move事件，取得当前触摸位置的绝对坐标。记得是绝对坐标，不要用getX() 取坐标。那样只是取得一个相对的坐标。而你的主页面在移动，你希望的是手指和主页面的相对移动距离为0 。自然是不能够用getRawX() 取相对坐标。
另外如果用OnGestureListener 去实现的，记得不要用OnScroll函数里面的distanceX 那个也是由相对坐标得到。自然，实现后也是会有很多错误的。所以应该用e2去获得绝对坐标与e1的绝对坐标相减，得到移动的距离。
@Overridepublic void onScroll(MotionEvent e1, MotionEvent e2,float distanceX, float distanceY) { //distanceX 是getX() 相减的，即是相对控件的坐标Log.i(TAG,"distanceX:"+distanceX+","+"e2-e1:"+e2.getRawX()+"-"+e1.getRawX());int dis = (int) (e2.getRawX()-e1.getRawX());RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) content.getLayoutParams();if(dis<0){//left e2-e1<0if(-dis<menuWidth&¶ms.rightMargin<menuWidth){params.rightMargin =-dis;params.leftMargin =dis;Log.i(TAG,"params.rightMargin:"+params.rightMargin+",params.leftMargin:"+params.leftMargin);content.setLayoutParams(params);}else{params.rightMargin =menuWidth;params.leftMargin =-menuWidth;Log.i(TAG,"params.rightMargin:"+params.rightMargin+",params.leftMargin:"+params.leftMargin);content.setLayoutParams(params);}}else{//rightif(dis<menuWidth&¶ms.rightMargin>0){params.rightMargin =menuWidth-dis;params.leftMargin =-(menuWidth-dis);Log.i(TAG,"params.rightMargin:"+params.rightMargin+",params.leftMargin:"+params.leftMargin);content.setLayoutParams(params);}else{params.rightMargin =0;params.leftMargin =0;Log.i(TAG,"params.rightMargin:"+params.rightMargin+",params.leftMargin:"+params.leftMargin);content.setLayoutParams(params);}}Log.i(TAG,"onscroll");}
建议直接设置主页面的OnTouchListener，免得一大堆东西。那个onGestureListener 很多函数都用不上。
当然最后就是移动部分后面，自动的动画了。学了下AysncTask 。这个用起来就会逻辑性很好了。
content.setOnTouchListener(new View.OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {// TODO Auto-generated method stubLog.i(TAG,"ontouchEvent");boolean result = detector.onTouchEvent(event); //建议直接在此处检测手势if(event.getAction()==MotionEvent.ACTION_UP){//结束switch(gestureListener.getDirection()){case SlideMenuOnGestureListener.LEFT://启动向左的动画new UpdateMargin(MoveDirection.LEFT).execute(gestureListener.getVelocityX());menuhasOpen = true;Log.i(TAG,"left end");break;case SlideMenuOnGestureListener.RIGHT://启动向右的动画new UpdateMargin(MoveDirection.RIGHT).execute(gestureListener.getVelocityX());menuhasOpen = false;Log.i(TAG,"right end");break;case SlideMenuOnGestureListener.NO_SCROLL:Log.i(TAG,"no scroll");//返回 恢复if(menuhasOpen){new UpdateMargin(MoveDirection.LEFT).execute(gestureListener.getVelocityX());}else{new UpdateMargin(MoveDirection.RIGHT).execute(gestureListener.getVelocityX());}break;}}return result;}});
动画：
static enum MoveDirection{LEFT,RIGHT;}/*** * @author houzhi* Boolean true 代表左*/class UpdateMargin extends AsyncTask<Float, Integer, Void>{final static long SLEEP_TIME = 50L;final static int MOVE_DISTANCE = 30;public MoveDirection direction;public UpdateMargin(MoveDirection direction){this.direction = direction; }boolean isLeft ;@Overrideprotected void onPostExecute(Void result) {// TODO Auto-generated method stubsuper.onPostExecute(result);}@Overrideprotected void onProgressUpdate(Integer... values) {RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams )content.getLayoutParams();layoutParams.leftMargin=values[0];layoutParams.rightMargin=values[1];content.setLayoutParams(layoutParams);}@Overrideprotected Void doInBackground(Float... params) {RelativeLayout.LayoutParams layoutParams ;int v = (int)(float)(params[0]/(100/SLEEP_TIME));switch(direction){case LEFT://leftwhile(true){layoutParams = (RelativeLayout.LayoutParams )content.getLayoutParams();if(layoutParams.rightMargin>=menuWidth){publishProgress(-menuWidth,menuWidth);break;}publishProgress(layoutParams.leftMargin-MOVE_DISTANCE,layoutParams.rightMargin+MOVE_DISTANCE);try {TimeUnit.MILLISECONDS.sleep(SLEEP_TIME);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}}break;case RIGHT://rightwhile(true){layoutParams = (RelativeLayout.LayoutParams )content.getLayoutParams();if(layoutParams.rightMargin-MOVE_DISTANCE<=0){//保证下一次能够运行。publishProgress(0,0);break;}publishProgress(layoutParams.leftMargin+MOVE_DISTANCE,layoutParams.rightMargin-MOVE_DISTANCE);try {TimeUnit.MILLISECONDS.sleep(SLEEP_TIME);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}}break;}return null;}
