public class RocketService extends Service {

   private WindowManager mWM;
   private View view;
   private int startX ;
   private int startY ;
   private LayoutParams params;

   @Override
   public IBinder onBind(Intent intent) {
      return null ;
   }

   @Override
   public void onCreate() {
      super .onCreate();
     System. out .println("服务创建。。。。" );
      mWM = (WindowManager) getSystemService(WINDOW_SERVICE );
      winWidth = mWM.getDefaultdisplay(). getWidth();
      winHeight = mWM .getDefaultdisplay().getHeight ();

      params = new WindowManager.LayoutParams();
      params. height = WindowManager.LayoutParams.WRAP_CONTENT ;
      params. width = WindowManager.LayoutParams.WRAP_CONTENT ;
      params. flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
          | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE ;
      params. format = PixelFormat. TRANSLUCENT ;
      params. type = WindowManager.LayoutParams.TYPE_PHONE ;
      params. gravity = Gravity. LEFT + Gravity. TOP;

      view = LayoutInflater.from( this).inflate(R.layout. rocket,null );
      //拿到 imageview，设置帧动画
     ImageView ivRocket = (ImageView) view .findViewById(R.id. rocket);
     ivRocket.setimageResource(R.drawable. rocket );
     AnimationDrawable drawable = (AnimationDrawable) ivRocket.getDrawable();
     drawable.start();
      mWM.addView( view,params);

      // 设置view的触摸事件，让它可以被拖拽
      view.setonTouchListener( new OnTouchListener() {

        @Override
        public boolean onTouch(View v,MotionEvent event) {
          switch (event.getAction()) {
          case MotionEvent. ACTION_DOWN:
             startX = ( int ) event.getRawX();
             startY = ( int ) event.getRawY();
             break ;
          case MotionEvent. ACTION_MOVE:
             int dx = (int ) (event.getRawX() - startX );
             int dy = (int ) (event.getRawY() - startY );
             // 更新浮窗位置
             params. x += dx;
             params. y += dy;

             // 限制窗口坐标不超过屏幕
             if (params .x < 0) {
               params. x = 0;
            }

             if (params .x > winWidth - view .getWidth()) {
               params. x = winWidth - view .getWidth();
            }

             if (params .y < 0) {
               params. y = 0;
            }

             if (params .y > winHeight - view .getHeight()) {
               params. y = winHeight - view .getHeight();
            }

             mWM.updateViewLayout( view,params );
             startX = ( int ) event.getRawX();
             startY = ( int ) event.getRawY();
             break ;
          case MotionEvent. ACTION_UP:
             // 手指抬起起，需要发射火箭，限定发射火箭的范围
             if (params .x > 0 && params. x < winWidth
                 && params. y > winHeight - 500) {
               sendRocket();
            }
             break ;
          }

          return true ;// 不再把事件传递给onClick处理
       }

     });
   }

   private Handler mHandler = new Handler() {
      @Override
      public void handleMessage(Message msg) {
          int y = msg.arg1 ;
          params. y = y;
          mWM.updateViewLayout( view,params);
     }
   };
   private int winWidth ;
   private int winHeight ;

   // 发射火箭
   private void sendRocket() {
      // 用子线程更新y轴
      new Thread(new Runnable() {

        @Override
        public void run() {
          int pos = 1000;
          for (int i=0; i <= 10; i++) {
               int y = pos-100*i;
               //休眠100ms发消息
               try {
                 Thread. sleep(100);
               } catch (InterruptedException e) {
                  // Todo Auto-generated catch block
                 e.printstacktrace();
               }

               Message msg = Message.obtain();
               msg. arg1 = y;
               mHandler.sendMessage(msg);
          }
       }
     }).start();
   }

   @Override
   public void onDestroy() {
      // Todo Auto-generated method stub
      super .onDestroy();
      if (mWM != null && view != null) {
        mWM.removeView( view);
        view = null ;
     }

   }
}

/***
     * 在应用图标的快捷方式上加数字
     * @param clazz 启动的activity
     * @param isShowNum 是否显示数字
     * @param num 显示的数字：整型
     * @param isstroke 是否加上边框
     * 
     */
    public static void addNumShortCut(Context context,Class<?> clazz,boolean isShowNum,String num,boolean isstroke)
     {
         Log.e(TAG,"manufacturer="+Build.MANUFACTURER);
      if (Build.MANUFACTURER.equalsIgnoreCase("Xiaomi")){
          //小米
       xiaoMiShortCut(context,clazz,num);

      }else if(Build.MANUFACTURER.equalsIgnoreCase("samsung")){
          //三星
          samsungShortCut(context,num);

      }else {//其他原生系统手机
          installrawShortCut(context,MainActivity.class,isShowNum,num,isstroke);
      }

     }

/***
* 应用的快捷方式工具类
* 
* @author yang
* 
*/
public class AppShortCutUtil {

    private static final String TAG = "AppShortCutUtil";

    //默认圆角半径
    private static final int DEFAULT_CORNER_RADIUS_DIP = 8;
    //默认边框宽度
    private static final int DEFAULT_stroke_WIDTH_DIP = 2;
    //边框的颜色
    private static final int DEFAULT_stroke_COLOR = Color.WHITE;
    //中间数字的颜色
    private static final int DEFAULT_NUM_COLOR = Color.parseColor("#CCFF0000");

    /***
     * 
     * 生成有数字的图片(没有边框)
     * @param context
     * @param icon 图片
     * @param isShowNum 是否要绘制数字
     * @param num 数字字符串：整型数字 超过99，显示为"99+"
     * @return
     */
    public static Bitmap generatorNumIcon(Context context,Bitmap icon,String num) {

        displayMetrics dm = context.getResources().getdisplayMetrics();
        //基准屏幕密度
        float baseDensity = 1.5f;//240dpi
        float factor = dm.density/baseDensity;

        Log.e(TAG,"density:"+dm.density);
        Log.e(TAG,"dpi:"+dm.densityDpi);
        Log.e(TAG,"factor:"+factor);

        // 初始化画布
        int iconSize = (int) context.getResources().getDimension(android.R.dimen.app_icon_size);
        Bitmap numIcon = Bitmap.createBitmap(iconSize,iconSize,Config.ARGB_8888);
        Canvas canvas = new Canvas(numIcon);

        // 拷贝图片
        Paint iconPaint = new Paint();
        iconPaint.setDither(true);// 防抖动
        iconPaint.setFilterBitmap(true);// 用来对Bitmap进行滤波处理，这样，当你选择Drawable时，会有抗锯齿的效果
        Rect src = new Rect(0,icon.getWidth(),icon.getHeight());
        Rect dst = new Rect(0,iconSize);
        canvas.drawBitmap(icon,src,dst,iconPaint);

        if(isShowNum){

            if(TextUtils.isEmpty(num)){
                num = "0";
            }

            if(!TextUtils.isDigitsOnly(num)){
                //非数字
                Log.e(TAG,"the num is not digit :"+ num);
                num = "0";
            }

            int numInt = Integer.valueOf(num);

            if(numInt > 99){//超过99

                num = "99+";

                // 启用抗锯齿和使用设备的文本字体大小
                Paint numPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
                numPaint.setColor(Color.WHITE);
                numPaint.setTextSize(20f*factor);
                numPaint.setTypeface(Typeface.DEFAULT_BOLD);
                int textWidth=(int)numPaint.measureText(num,num.length());

                Log.e(TAG,"text width:"+textWidth);

                int circleCenter = (int) (15*factor);//中心坐标
                int circleRadius = (int) (13*factor);//圆的半径

                //绘制左边的圆形
                Paint leftCirPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
                leftCirPaint.setColor(Color.RED);
                canvas.drawCircle(iconSize-circleRadius-textWidth+(10*factor),circleCenter,circleRadius,leftCirPaint);

                //绘制右边的圆形
                Paint rightCirPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
                rightCirPaint.setColor(Color.RED);
                canvas.drawCircle(iconSize-circleRadius,rightCirPaint);

                //绘制中间的距形
                Paint rectPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
                rectPaint.setColor(Color.RED);
                RectF oval = new RectF(iconSize-circleRadius-textWidth+(10*factor),2*factor,iconSize-circleRadius,circleRadius*2+2*factor);
                canvas.drawRect(oval,rectPaint);

                //绘制数字
                canvas.drawText(num,(float)(iconSize-textWidth/2-(24*factor)),23*factor,numPaint);

            }else{//<=99

                // 启用抗锯齿和使用设备的文本字体大小
                Paint numPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
                numPaint.setColor(Color.WHITE);
                numPaint.setTextSize(20f*factor);
                numPaint.setTypeface(Typeface.DEFAULT_BOLD);
                int textWidth=(int)numPaint.measureText(num,"text width:"+textWidth);

                //绘制外面的圆形
                //Paint outCirPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
                //outCirPaint.setColor(Color.WHITE);
                //canvas.drawCircle(iconSize - 15,15,outCirPaint);

                //绘制内部的圆形
                Paint inCirPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
                inCirPaint.setColor(Color.RED);
                canvas.drawCircle(iconSize-15*factor,15*factor,inCirPaint);

                //绘制数字
                canvas.drawText(num,(float)(iconSize-textWidth/2-15*factor),22*factor,numPaint);
            }
        }
        return numIcon;
    }

    /***
     * 
     * 生成有数字的图片(没有边框)
     * @param context
     * @param icon 图片
     * @param isShowNum 是否要绘制数字
     * @param num 数字字符串：整型数字 超过99，显示为"99+"
     * @return
     */
    public static Bitmap generatorNumIcon2(Context context,"the num is not digit :"+ num);
                num = "0";
            }

            int numInt = Integer.valueOf(num);

            if(numInt > 99){//超过99
                num = "99+";
            }

            //启用抗锯齿和使用设备的文本字体大小
            //测量文本占用的宽度
            Paint numPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
            numPaint.setColor(Color.WHITE);
            numPaint.setTextSize(20f*factor);
            numPaint.setTypeface(Typeface.DEFAULT_BOLD);
            int textWidth=(int)numPaint.measureText(num,num.length());
            Log.e(TAG,"text width:"+textWidth);

            /**----------------------------------*
             * Todo 绘制圆角矩形背景 start
             *------------------------------------*/
            //圆角矩形背景的宽度
            int backgroundHeight = (int) (2*15*factor);
            int backgroundWidth = textWidth>backgroundHeight ? (int)(textWidth+10*factor) : backgroundHeight;

            canvas.save();//保存状态

            ShapeDrawable drawable = getDefaultBackground(context);
            drawable.setIntrinsicHeight(backgroundHeight);
            drawable.setIntrinsicWidth(backgroundWidth);
            drawable.setBounds(0,backgroundWidth,backgroundHeight);
            canvas.translate(iconSize-backgroundWidth,0);
            drawable.draw(canvas);

            canvas.restore();//重置为之前保存的状态

            /**----------------------------------*
             * Todo 绘制圆角矩形背景 end
             *------------------------------------*/

            //绘制数字
            canvas.drawText(num,(float)(iconSize-(backgroundWidth + textWidth)/2),numPaint);
        }
        return numIcon;
    }
    /***
     * 
     * 生成有数字的图片(有边框)
     * @param context
     * @param icon 图片
     * @param isShowNum 是否要绘制数字
     * @param num 数字字符串：整型数字 超过99，显示为"99+"
     * @return
     */
    public static Bitmap generatorNumIcon3(Context context,"text width:"+textWidth);

            /**----------------------------------*
             * Todo 绘制圆角矩形背景：先画边框，再画内部的圆角矩形 start
             *------------------------------------*/
            //圆角矩形背景的宽度
            int backgroundHeight = (int) (2*15*factor);
            int backgroundWidth = textWidth>backgroundHeight ? (int)(textWidth+10*factor) : backgroundHeight;
            //边框的宽度
            int strokeThickness = (int) (2*factor);

            canvas.save();//保存状态

            int strokeHeight = backgroundHeight + strokeThickness*2;
            int strokeWidth = textWidth>strokeHeight ? (int)(textWidth+ 10*factor + 2*strokeThickness) : strokeHeight;
            ShapeDrawable outstroke = getDefaultstrokeDrawable(context);
            outstroke.setIntrinsicHeight(strokeHeight);
            outstroke.setIntrinsicWidth(strokeWidth);
            outstroke.setBounds(0,strokeWidth,strokeHeight);
            canvas.translate(iconSize-strokeWidth-strokeThickness,strokeThickness);
            outstroke.draw(canvas);

            canvas.restore();//重置为之前保存的状态

            canvas.save();//保存状态

            ShapeDrawable drawable = getDefaultBackground(context);
            drawable.setIntrinsicHeight((int) (backgroundHeight+2*factor));
            drawable.setIntrinsicWidth((int) (backgroundWidth+2*factor));
            drawable.setBounds(0,backgroundHeight);
            canvas.translate(iconSize-backgroundWidth-2*strokeThickness,2*strokeThickness);
            drawable.draw(canvas);

            canvas.restore();//重置为之前保存的状态

            /**----------------------------------*
             * Todo 绘制圆角矩形背景 end
             *------------------------------------*/

            //绘制数字
            canvas.drawText(num,(float)(iconSize-(backgroundWidth + textWidth+4*strokeThickness)/2),(22)*factor+2*strokeThickness,numPaint);
        }
        return numIcon;
    }

    /***
     * 
     * 生成有数字的图片(有边框的)
     * @param context
     * @param icon 图片
     * @param isShowNum 是否要绘制数字
     * @param num 数字字符串：整型数字 超过99，显示为"99+"
     * @return
     */
    public static Bitmap generatorNumIcon4(Context context,Config.ARGB_8888);
        Canvas canvas = new Canvas(numIcon);

        // 拷贝图片
        Paint iconPaint = new Paint();
        iconPaint.setDither(true);// 防抖处理
        iconPaint.setFilterBitmap(true);// 用来对Bitmap进行滤波处理，这样，当你选择Drawable时，会有抗锯齿的效果
        Rect src = new Rect(0,"the num is not digit :"+ num);
                num = "0";
            }

            int numInt = Integer.valueOf(num);

            if(numInt > 99){//超过99
                num = "99+";
            }

            //启用抗锯齿和使用设备的文本字体
            //测量文本占用的宽度
            Paint numPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
            numPaint.setColor(Color.WHITE);
            numPaint.setTextSize(25f*factor);
            numPaint.setTypeface(Typeface.DEFAULT_BOLD);
            int textWidth=(int)numPaint.measureText(num,"text width:"+textWidth);

            /**----------------------------------*
             * Todo 绘制圆角矩形背景 start
             *------------------------------------*/
            //边框的宽度
            int strokeThickness = (int) (DEFAULT_stroke_WIDTH_DIP*factor);
            //圆角矩形背景的宽度
            float radiusPx = 15*factor;
            int backgroundHeight = (int) (2*(radiusPx+strokeThickness));//2*(半径+边框宽度)
            int backgroundWidth = textWidth>backgroundHeight ? (int)(textWidth + 10*factor + 2*strokeThickness) : backgroundHeight;

            canvas.save();//保存状态

            ShapeDrawable drawable = getDefaultBackground2(context);
            drawable.setIntrinsicHeight(backgroundHeight);
            drawable.setIntrinsicWidth(backgroundWidth);
            drawable.setBounds(0,backgroundHeight);
            canvas.translate(iconSize-backgroundWidth-strokeThickness,(float)(iconSize-(backgroundWidth + textWidth+2*strokeThickness)/2),(float) (25*factor+2.5*strokeThickness),numPaint);
        }
        return numIcon;
    }

    /***
     * 创建原生系统的快捷方式
     * @param context 
     * @param clazz 启动的activity
     * @param isShowNum 是否显示数字
     * @param num 显示的数字：整型
     * @param isstroke 是否加上边框
     */

    public static void installrawShortCut(Context context,boolean isstroke) {
        Log.e(TAG,"installShortCut....");

        Intent shortcutIntent = new Intent(    "com.android.launcher.action.INSTALL_SHORTCUT");
        //名称
        shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME,context.getString(R.string.app_name));

        // 是否可以有多个快捷方式的副本，参数如果是true就可以生成多个快捷方式，如果是false就不会重复添加
        shortcutIntent.putExtra("duplicate",false);

        //点击快捷方式：打开activity
        Intent mainIntent = new Intent(Intent.ACTION_MAIN);
        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
        mainIntent.setClass(context,clazz);
        shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT,mainIntent);

        //快捷方式的图标
        if(isstroke){
            shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON,generatorNumIcon4(
                            context,((BitmapDrawable)context.getResources().getDrawable(R.drawable.ic_launcher)).getBitmap(),num));
        }else{
            shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON,generatorNumIcon2(
                            context,num));
        }
        context.sendbroadcast(shortcutIntent);
    }

    /***
     * 是否已经创建了快捷方式
     * @param context
     * @return
     */
    public static boolean isAddShortCut(Context context) {
         Log.e(TAG,"isAddShortCut....");

      boolean isInstallShortcut = false;
      final ContentResolver cr = context.getContentResolver();

      //Todo 注释的代码，在有的手机：修改了ROM的系统，不能支持
      /*int versionLevel = android.os.Build.VERSION.SDK_INT;
            String AUTHORITY = "com.android.launcher2.settings";
            //2.2以上的系统的文件文件名字是不一样的
            if (versionLevel >= 8) {
              AUTHORITY = "com.android.launcher2.settings";
            } else {
              AUTHORITY = "com.android.launcher.settings";
            }*/

        String AUTHORITY = getAuthorityFromPermission(context,"com.android.launcher.permission.READ_SETTINGS");
        Log.e(TAG,"AUTHORITY : " +AUTHORITY);
        final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY
        + "/favorites?notify=true");

        Cursor c = cr.query(CONTENT_URI,new String[] { "title" },"title=?",new String[] { context.getString(R.string.app_name) },null);

        if (c != null && c.getCount() > 0) {
          isInstallShortcut = true;
        }

        if(c != null){
            c.close();
        }

        Log.e(TAG,"isAddShortCut....isInstallShortcut="+isInstallShortcut);

      return isInstallShortcut;
    }

    /**
     * 删除快捷方式 
     * @param context
     * @param clazz
     */
     public static void deleteShortCut(Context context,Class<?> clazz){
         Log.e(TAG,"delShortcut....");

         if (Build.MANUFACTURER.equalsIgnoreCase("Xiaomi")){
            //小米
            //当为""时，不显示数字，相当于隐藏了)
            xiaoMiShortCut(context,"");

        }else if(Build.MANUFACTURER.equalsIgnoreCase("samsung")){
            //三星
            samsungShortCut(context,"0");

        }else {//其他原生系统手机
            //删除显示数字的快捷方式
            deleterawShortCut(context,clazz);
            //安装不显示数字的快捷方式
            //installrawShortCut(context,false,"0");
        }
     }

    /***
     * 删除原生系统的快捷方式
     * @param context
     * @param clazz 启动的activity
     */
    public static void deleterawShortCut(Context context,Class<?> clazz) {
        Intent intent = new Intent("com.android.launcher.action.UNINSTALL_SHORTCUT");
        //快捷方式的名称
        intent.putExtra(Intent.EXTRA_SHORTCUT_NAME,context.getString(R.string.app_name));

        Intent intent2 = new Intent(); 
        intent2.setClass(context,clazz); 
        intent2.setAction(Intent.ACTION_MAIN); 
        intent2.addCategory(Intent.CATEGORY_LAUNCHER); 
        intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT,intent2); 

        context.sendbroadcast(intent);
    }

     /***
     * 取得权限相应的认证URI
     * @param context
     * @param permission
     * @return
     */
    public static String getAuthorityFromPermission(Context context,String permission) {
        if (TextUtils.isEmpty(permission)) {
            return null;
        }
        List<PackageInfo> packInfos = context.getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS);
        if (packInfos == null) {
            return null;
        }
        for (PackageInfo info : packInfos) {
            ProviderInfo[] providers = info.providers;
            if (providers != null) {
                for (ProviderInfo provider : providers) {
                    if (permission.equals(provider.readPermission)
                            || permission.equals(provider.writePermission)) {
                        return provider.authority;
                    }
                }
            }
        }
        return null;
    }

    /***
     * 在小米应用图标的快捷方式上加数字<br>
     * 
     * 
     * @param context
     * @param num 显示的数字：大于99，为"99"，当为""时，不显示数字，相当于隐藏了)<br><br>
     * 
     * 注意点：
     * context.getPackageName()+"/."+clazz.getSimpleName() （这个是启动activity的路径）中的"/."不能缺少
     * 
     */
    public static void xiaoMiShortCut(Context context,String num)
     {
        Log.e(TAG,"xiaoMiShortCut....");
        Intent localIntent = new Intent("android.intent.action.APPLICATION_MESSAGE_UPDATE");
        localIntent.putExtra("android.intent.extra.update_application_component_name",context.getPackageName()+"/."+clazz.getSimpleName());
        if(TextUtils.isEmpty(num)){
            num = "";
        }else{
          int numInt = Integer.valueOf(num);
          if (numInt > 0){
             if (numInt > 99){
                num = "99";
           }
          }else{
              num = "0";
          }
        }
        localIntent.putExtra("android.intent.extra.update_application_message_text",num);
        context.sendbroadcast(localIntent);
     }                                            

     /***
     * 索尼手机：应用图标的快捷方式上加数字
     * @param context
     * @param num
     */
    public static void sonyShortCut(Context context,String num)
     {
      String activityName = getLaunchActivityName(context);
      if (activityName == null){
       return;
      }
      Intent localIntent = new Intent();
      int numInt = Integer.valueOf(num);
      boolean isShow = true;
      if (numInt < 1){
       num = "";
       isShow = false;
      }else if (numInt > 99){
          num = "99";
      }
      localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.SHOW_MESSAGE",isShow);
      localIntent.setAction("com.sonyericsson.home.action.UPDATE_BADGE");
      localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.ACTIVITY_NAME",activityName);
      localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.MESSAGE",num);
      localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.PACKAGE_NAME",context.getPackageName());
      context.sendbroadcast(localIntent);
     }

     /***
     * 三星手机：应用图标的快捷方式上加数字
     * @param context
     * @param num
     */
    public static void samsungShortCut(Context context,String num)
     {
        int numInt = Integer.valueOf(num);
      if (numInt < 1)
      {
       num = "0";
      }else if (numInt > 99){
          num = "99";
      }
         String activityName = getLaunchActivityName(context);
      Intent localIntent = new Intent("android.intent.action.BADGE_COUNT_UPDATE");
      localIntent.putExtra("badge_count",num);
      localIntent.putExtra("badge_count_package_name",context.getPackageName());
      localIntent.putExtra("badge_count_class_name",activityName);
      context.sendbroadcast(localIntent);
     }

     /***
     * 在应用图标的快捷方式上加数字
     * @param clazz 启动的activity
     * @param isShowNum 是否显示数字
     * @param num 显示的数字：整型
     * @param isstroke 是否加上边框
     * 
     */
    public static void addNumShortCut(Context context,isstroke);
      }

     }

     /***
     * 取得当前应用的启动activity的名称：
     * mainfest.xml中配置的 android:name:"
     * @param context
     * @return
     */
    public static String getLaunchActivityName(Context context)
     {
      PackageManager localPackageManager = context.getPackageManager();
      Intent localIntent = new Intent("android.intent.action.MAIN");
      localIntent.addCategory("android.intent.category.LAUNCHER");
      try
      {
       Iterator<ResolveInfo> localIterator = localPackageManager.queryIntentActivities(localIntent,0).iterator();
       while (localIterator.hasNext())
       {
        ResolveInfo localResolveInfo = localIterator.next();
        if (!localResolveInfo.activityInfo.applicationInfo.packageName.equalsIgnoreCase(context.getPackageName()))
         continue;
        String str = localResolveInfo.activityInfo.name;
        return str;
       }
      }
      catch (Exception localException)
      {
       return null;
      }
      return null;
     }

    /***
     * 得到一个默认的背景：圆角矩形<br><br>
     * 使用代码来生成一个背景：相当于用<shape>的xml的背景
     * 
     * @return
     */
    private static ShapeDrawable getDefaultBackground(Context context) {

        //这个是为了应对不同分辨率的手机，屏幕兼容性
        int r = dipToPixels(context,DEFAULT_CORNER_RADIUS_DIP);
        float[] outerR = new float[] {r,r,r};

        //圆角矩形
        RoundRectShape rr = new RoundRectShape(outerR,null,null);
        ShapeDrawable drawable = new ShapeDrawable(rr);
        drawable.getPaint().setColor(DEFAULT_NUM_COLOR);//设置颜色
        return drawable;

    }
    /***
     * 得到一个默认的背景：圆角矩形<br><br>
     * 使用代码来生成一个背景：相当于用<shape>的xml的背景
     * 
     * @return
     */
    private static ShapeDrawable getDefaultBackground2(Context context) {

        //这个是为了应对不同分辨率的手机，屏幕兼容性
        int r = dipToPixels(context,r};
        int distance = dipToPixels(context,DEFAULT_stroke_WIDTH_DIP);

        //圆角矩形
        RoundRectShape rr = new RoundRectShape(outerR,null);
        customBorderDrawable drawable = new customBorderDrawable(context,rr);
        drawable.getFillpaint().setColor(DEFAULT_NUM_COLOR);//设置填充颜色
        drawable.getstrokepaint().setColor(DEFAULT_stroke_COLOR);//设置边框颜色
        drawable.getstrokepaint().setstrokeWidth(distance);//设置边框宽度
        return drawable;

    }

    /***
     * 得到一个默认的背景：圆角矩形<br><br>
     * 使用代码来生成一个背景：相当于用<shape>的xml的背景
     * 
     * @return
     */
    private static ShapeDrawable getDefaultstrokeDrawable(Context context) {

        //这个是为了应对不同分辨率的手机，屏幕兼容性
        int r = dipToPixels(context,DEFAULT_CORNER_RADIUS_DIP);
        int distance = dipToPixels(context,DEFAULT_stroke_WIDTH_DIP);
        float[] outerR = new float[] {r,null);
        ShapeDrawable drawable = new ShapeDrawable(rr);
        drawable.getPaint().setstrokeWidth(distance);
        drawable.getPaint().setStyle(Paint.Style.FILL);
        drawable.getPaint().setColor(DEFAULT_stroke_COLOR);//设置颜色
        return drawable;
    }
    /***
     * dp to px
     * @param dip
     * @return
     */
    public static int dipToPixels(Context context,int dip) {
        Resources r = context.getResources();
        float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,dip,r.getdisplayMetrics());
        return (int) px;
    }
}

<uses-permission android:name="android.permission.SYstem_ALERT_WINDOW" />

import android.content.Context;
import android.graphics.PixelFormat;
import android.graphics.Point;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.Toast;

import com.android.view.FloatMessagePopleDialog;

/**
 * Created by liupanpan on 2017/3/16.
 */

public class FloatMessagerMainWindow {
 private Context context;
 private View view;
 private WindowManager.LayoutParams mParams = null;
 private WindowManager windowManager = null;
 private static FloatMessagerMainWindow floatMessagerMainWindow;

 public FloatMessagerMainWindow(Context context,View view) {
  this.context = context;
  this.view = view;
  showWindow(context);
 }

 public static FloatMessagerMainWindow getFloatMessagerMainWindow(Context context,View view) {
  if (floatMessagerMainWindow == null) {
   synchronized (FloatMessagerMainWindow.class) {
    if (floatMessagerMainWindow == null) {
     floatMessagerMainWindow = new FloatMessagerMainWindow(context,view);
    }
   }
  }
  return floatMessagerMainWindow;
 }

 private void showWindow(final Context context) {
//  if (!isWindowdismiss) {
//   Log.e(TAG,"view is already added here");
//   return;
//  }
//  isWindowdismiss = false;
  if (windowManager == null) {
   windowManager = (WindowManager) context.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
  }

  Point size = new Point();
  windowManager.getDefaultdisplay().getSize(size);
  int screenWidth = size.x;
  int screenHeight = size.y;

  mParams = new WindowManager.LayoutParams();
  mParams.packageName = context.getPackageName();
  mParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
  mParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
  mParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
    | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR
    | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
  mParams.type = WindowManager.LayoutParams.TYPE_SYstem_ERROR;
//  mParams.softInputMode = WindowManager.LayoutParams.soFT_INPUT_ADJUST_RESIZE |
//    WindowManager.LayoutParams.soFT_INPUT_STATE_HIDDEN;
  mParams.format = PixelFormat.RGBA_8888;
  mParams.gravity = Gravity.LEFT | Gravity.TOP;
  mParams.x = screenWidth - dp2px(context,450);
  mParams.y = screenHeight - dp2px(context,550);


  ImageView imageView = new ImageView(context);
  imageView.setimageResource(R.mipmap.icon_tab_item_message_pressed);
  imageView.setonClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    Toast.makeText(context,"image=========",Toast.LENGTH_SHORT).show();
    View view = LayoutInflater.from(context).inflate(R.layout.float_pople_room_layout,null);
    FloatMessagePopleDialog.getInstance(context,R.style.webviewTheme).setContextView(view);
   }
  });
//  floatView = new AVCallFloatView(context);
//  floatView.setParams(mParams);
//  floatView.setIsShowing(true);
  windowManager.addView(imageView,mParams);
 }

 private int dp2px(Context context,float dp) {
  final float scale = context.getResources().getdisplayMetrics().density;
  return (int) (dp * scale + 0.1f);
 }
}

FloatMessagerMainWindow.getFloatMessagerMainWindow(context,null);

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 xmlns:tools="http://schemas.android.com/tools" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" 
 tools:context=".MainActivity" > 
 <Button 
 android:id="@+id/start_float_window" 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content" 
 android:text="Start Float Window" > 
 </Button> 
</RelativeLayout> 

<?xml version="1.0" encoding="UTF-8"?> 
<LinearLayout 
 xmlns:android="http://schemas.android.com/apk/res/android" 
 android:id="@+id/small_window_layout" 
 android:layout_width="60dip" 
 android:layout_height="25dip" 
 android:background="@drawable/bg_small" 
 > 
 <TextView 
 android:id="@+id/percent" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" 
 android:gravity="center" 
 android:textColor="#ffffff" 
 /> 
</LinearLayout> 

<?xml version="1.0" encoding="UTF-8"?> 
<LinearLayout 
 xmlns:android="http://schemas.android.com/apk/res/android" 
 android:id="@+id/big_window_layout" 
 android:layout_width="200dip" 
 android:layout_height="100dip" 
 android:background="@drawable/bg_big" 
 android:orientation="vertical" 
 > 
 <Button 
 android:id="@+id/close" 
 android:layout_width="100dip" 
 android:layout_height="40dip" 
 android:layout_gravity="center_horizontal" 
 android:layout_marginTop="12dip" 
 android:text="关闭悬浮窗" 
 /> 
 <Button 
 android:id="@+id/back" 
 android:layout_width="100dip" 
 android:layout_height="40dip" 
 android:layout_gravity="center_horizontal" 
 android:text="返回" 
 /> 
</LinearLayout> 

public class MainActivity extends Activity { 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
 super.onCreate(savedInstanceState); 
 setContentView(R.layout.activity_main); 
 Button startFloatwindow = (Button) findViewById(R.id.start_float_window); 
 startFloatwindow.setonClickListener(new OnClickListener() { 
 @Override 
 public void onClick(View arg0) { 
 Intent intent = new Intent(MainActivity.this,FloatwindowService.class); 
 startService(intent); 
 finish(); 
 } 
 }); 
 } 
}

public class FloatwindowService extends Service { 
 
 /** 
 * 用于在线程中创建或移除悬浮窗。 
 */ 
 private Handler handler = new Handler(); 
 
 /** 
 * 定时器，定时进行检测当前应该创建还是移除悬浮窗。 
 */ 
 private Timer timer; 
 
 @Override 
 public IBinder onBind(Intent intent) { 
 return null; 
 } 
 
 @Override 
 public int onStartCommand(Intent intent,int flags,int startId) { 
 // 开启定时器，每隔0.5秒刷新一次 
 if (timer == null) { 
 timer = new Timer(); 
 timer.scheduleAtFixedrate(new RefreshTask(),500); 
 } 
 return super.onStartCommand(intent,flags,startId); 
 } 
 
 @Override 
 public void onDestroy() { 
 super.onDestroy(); 
 // Service被终止的同时也停止定时器继续运行 
 timer.cancel(); 
 timer = null; 
 } 
 
 class RefreshTask extends TimerTask { 
 
 @Override 
 public void run() { 
 // 当前界面是桌面，且没有悬浮窗显示，则创建悬浮窗。 
 if (isHome() && !MyWindowManager.isWindowShowing()) { 
 handler.post(new Runnable() { 
 @Override 
 public void run() { 
 MyWindowManager.createSmallWindow(getApplicationContext()); 
 } 
 }); 
 } 
 // 当前界面不是桌面，且有悬浮窗显示，则移除悬浮窗。 
 else if (!isHome() && MyWindowManager.isWindowShowing()) { 
 handler.post(new Runnable() { 
 @Override 
 public void run() { 
 MyWindowManager.removeSmallWindow(getApplicationContext()); 
 MyWindowManager.removeBigWindow(getApplicationContext()); 
 } 
 }); 
 } 
 // 当前界面是桌面，且有悬浮窗显示，则更新内存数据。 
 else if (isHome() && MyWindowManager.isWindowShowing()) { 
 handler.post(new Runnable() { 
 @Override 
 public void run() { 
 MyWindowManager.updateUsedPercent(getApplicationContext()); 
 } 
 }); 
 } 
 } 
 
 } 
 
 /** 
 * 判断当前界面是否是桌面 
 */ 
 private boolean isHome() { 
 ActivityManager mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); 
 List<RunningTaskInfo> rti = mActivityManager.getRunningTasks(1); 
 return getHomes().contains(rti.get(0).topActivity.getPackageName()); 
 } 
 
 /** 
 * 获得属于桌面的应用的应用包名称 
 * 
 * @return 返回包含所有包名的字符串列表 
 */ 
 private List<String> getHomes() { 
 List<String> names = new ArrayList<String>(); 
 PackageManager packageManager = this.getPackageManager(); 
 Intent intent = new Intent(Intent.ACTION_MAIN); 
 intent.addCategory(Intent.CATEGORY_HOME); 
 List<ResolveInfo> resolveInfo = packageManager.queryIntentActivities(intent,PackageManager.MATCH_DEFAULT_ONLY); 
 for (ResolveInfo ri : resolveInfo) { 
 names.add(ri.activityInfo.packageName); 
 } 
 return names; 
 } 
} 

public class FloatwindowSmallView extends LinearLayout { 
 
 /** 
 * 记录小悬浮窗的宽度 
 */ 
 public static int viewWidth; 
 
 /** 
 * 记录小悬浮窗的高度 
 */ 
 public static int viewHeight; 
 
 /** 
 * 记录系统状态栏的高度 
 */ 
 private static int statusBarHeight; 
 
 /** 
 * 用于更新小悬浮窗的位置 
 */ 
 private WindowManager windowManager; 
 
 /** 
 * 小悬浮窗的参数 
 */ 
 private WindowManager.LayoutParams mParams; 
 
 /** 
 * 记录当前手指位置在屏幕上的横坐标值 
 */ 
 private float xInScreen; 
 
 /** 
 * 记录当前手指位置在屏幕上的纵坐标值 
 */ 
 private float yInScreen; 
 
 /** 
 * 记录手指按下时在屏幕上的横坐标的值 
 */ 
 private float xDownInScreen; 
 
 /** 
 * 记录手指按下时在屏幕上的纵坐标的值 
 */ 
 private float yDownInScreen; 
 
 /** 
 * 记录手指按下时在小悬浮窗的View上的横坐标的值 
 */ 
 private float xInView; 
 
 /** 
 * 记录手指按下时在小悬浮窗的View上的纵坐标的值 
 */ 
 private float yInView; 
 
 public FloatwindowSmallView(Context context) { 
 super(context); 
 windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); 
 LayoutInflater.from(context).inflate(R.layout.float_window_small,this); 
 View view = findViewById(R.id.small_window_layout); 
 viewWidth = view.getLayoutParams().width; 
 viewHeight = view.getLayoutParams().height; 
 TextView percentView = (TextView) findViewById(R.id.percent); 
 percentView.setText(MyWindowManager.getUsedPercentValue(context)); 
 } 
 
 @Override 
 public boolean onTouchEvent(MotionEvent event) { 
 switch (event.getAction()) { 
 case MotionEvent.ACTION_DOWN: 
 // 手指按下时记录必要数据,纵坐标的值都需要减去状态栏高度 
 xInView = event.getX(); 
 yInView = event.getY(); 
 xDownInScreen = event.getRawX(); 
 yDownInScreen = event.getRawY() - getStatusBarHeight(); 
 xInScreen = event.getRawX(); 
 yInScreen = event.getRawY() - getStatusBarHeight(); 
 break; 
 case MotionEvent.ACTION_MOVE: 
 xInScreen = event.getRawX(); 
 yInScreen = event.getRawY() - getStatusBarHeight(); 
 // 手指移动的时候更新小悬浮窗的位置 
 updateViewPosition(); 
 break; 
 case MotionEvent.ACTION_UP: 
 // 如果手指离开屏幕时，xDownInScreen和xInScreen相等，且yDownInScreen和yInScreen相等，则视为触发了单击事件。 
 if (xDownInScreen == xInScreen && yDownInScreen == yInScreen) { 
 openBigWindow(); 
 } 
 break; 
 default: 
 break; 
 } 
 return true; 
 } 
 
 /** 
 * 将小悬浮窗的参数传入，用于更新小悬浮窗的位置。 
 * 
 * @param params 
 * 小悬浮窗的参数 
 */ 
 public void setParams(WindowManager.LayoutParams params) { 
 mParams = params; 
 } 
 
 /** 
 * 更新小悬浮窗在屏幕中的位置。 
 */ 
 private void updateViewPosition() { 
 mParams.x = (int) (xInScreen - xInView); 
 mParams.y = (int) (yInScreen - yInView); 
 windowManager.updateViewLayout(this,mParams); 
 } 
 
 /** 
 * 打开大悬浮窗，同时关闭小悬浮窗。 
 */ 
 private void openBigWindow() { 
 MyWindowManager.createBigWindow(getContext()); 
 MyWindowManager.removeSmallWindow(getContext()); 
 } 
 
 /** 
 * 用于获取状态栏的高度。 
 * 
 * @return 返回状态栏高度的像素值。 
 */ 
 private int getStatusBarHeight() { 
 if (statusBarHeight == 0) { 
 try { 
 Class<?> c = Class.forName("com.android.internal.R$dimen"); 
 Object o = c.newInstance(); 
 Field field = c.getField("status_bar_height"); 
 int x = (Integer) field.get(o); 
 statusBarHeight = getResources().getDimensionPixelSize(x); 
 } catch (Exception e) { 
 e.printstacktrace(); 
 } 
 } 
 return statusBarHeight; 
 } 

public class FloatwindowBigView extends LinearLayout { 
 
 /** 
 * 记录大悬浮窗的宽度 
 */ 
 public static int viewWidth; 
 
 /** 
 * 记录大悬浮窗的高度 
 */ 
 public static int viewHeight; 
 
 public FloatwindowBigView(final Context context) { 
 super(context); 
 LayoutInflater.from(context).inflate(R.layout.float_window_big,this); 
 View view = findViewById(R.id.big_window_layout); 
 viewWidth = view.getLayoutParams().width; 
 viewHeight = view.getLayoutParams().height; 
 Button close = (Button) findViewById(R.id.close); 
 Button back = (Button) findViewById(R.id.back); 
 close.setonClickListener(new OnClickListener() { 
 @Override 
 public void onClick(View v) { 
 // 点击关闭悬浮窗的时候，移除所有悬浮窗，并停止Service 
 MyWindowManager.removeBigWindow(context); 
 MyWindowManager.removeSmallWindow(context); 
 Intent intent = new Intent(getContext(),FloatwindowService.class); 
 context.stopService(intent); 
 } 
 }); 
 back.setonClickListener(new OnClickListener() { 
 @Override 
 public void onClick(View v) { 
 // 点击返回的时候，移除大悬浮窗，创建小悬浮窗 
 MyWindowManager.removeBigWindow(context); 
 MyWindowManager.createSmallWindow(context); 
 } 
 }); 
 } 
}

public class MyWindowManager { 
 
 /** 
 * 小悬浮窗View的实例 
 */ 
 private static FloatwindowSmallView smallWindow; 
 
 /** 
 * 大悬浮窗View的实例 
 */ 
 private static FloatwindowBigView bigWindow; 
 
 /** 
 * 小悬浮窗View的参数 
 */ 
 private static LayoutParams smallWindowParams; 
 
 /** 
 * 大悬浮窗View的参数 
 */ 
 private static LayoutParams bigWindowParams; 
 
 /** 
 * 用于控制在屏幕上添加或移除悬浮窗 
 */ 
 private static WindowManager mWindowManager; 
 
 /** 
 * 用于获取手机可用内存 
 */ 
 private static ActivityManager mActivityManager; 
 
 /** 
 * 创建一个小悬浮窗。初始位置为屏幕的右部中间位置。 
 * 
 * @param context 
 * 必须为应用程序的Context. 
 */ 
 public static void createSmallWindow(Context context) { 
 WindowManager windowManager = getwindowManager(context); 
 int screenWidth = windowManager.getDefaultdisplay().getWidth(); 
 int screenHeight = windowManager.getDefaultdisplay().getHeight(); 
 if (smallWindow == null) { 
 smallWindow = new FloatwindowSmallView(context); 
 if (smallWindowParams == null) { 
 smallWindowParams = new LayoutParams(); 
 smallWindowParams.type = LayoutParams.TYPE_PHONE; 
 smallWindowParams.format = PixelFormat.RGBA_8888; 
 smallWindowParams.flags = LayoutParams.FLAG_NOT_TOUCH_MODAL 
 | LayoutParams.FLAG_NOT_FOCUSABLE; 
 smallWindowParams.gravity = Gravity.LEFT | Gravity.TOP; 
 smallWindowParams.width = FloatwindowSmallView.viewWidth; 
 smallWindowParams.height = FloatwindowSmallView.viewHeight; 
 smallWindowParams.x = screenWidth; 
 smallWindowParams.y = screenHeight / 2; 
 } 
 smallWindow.setParams(smallWindowParams); 
 windowManager.addView(smallWindow,smallWindowParams); 
 } 
 } 
 
 /** 
 * 将小悬浮窗从屏幕上移除。 
 * 
 * @param context 
 * 必须为应用程序的Context. 
 */ 
 public static void removeSmallWindow(Context context) { 
 if (smallWindow != null) { 
 WindowManager windowManager = getwindowManager(context); 
 windowManager.removeView(smallWindow); 
 smallWindow = null; 
 } 
 } 
 
 /** 
 * 创建一个大悬浮窗。位置为屏幕正中间。 
 * 
 * @param context 
 * 必须为应用程序的Context. 
 */ 
 public static void createBigWindow(Context context) { 
 WindowManager windowManager = getwindowManager(context); 
 int screenWidth = windowManager.getDefaultdisplay().getWidth(); 
 int screenHeight = windowManager.getDefaultdisplay().getHeight(); 
 if (bigWindow == null) { 
 bigWindow = new FloatwindowBigView(context); 
 if (bigWindowParams == null) { 
 bigWindowParams = new LayoutParams(); 
 bigWindowParams.x = screenWidth / 2 - FloatwindowBigView.viewWidth / 2; 
 bigWindowParams.y = screenHeight / 2 - FloatwindowBigView.viewHeight / 2; 
 bigWindowParams.type = LayoutParams.TYPE_PHONE; 
 bigWindowParams.format = PixelFormat.RGBA_8888; 
 bigWindowParams.gravity = Gravity.LEFT | Gravity.TOP; 
 bigWindowParams.width = FloatwindowBigView.viewWidth; 
 bigWindowParams.height = FloatwindowBigView.viewHeight; 
 } 
 windowManager.addView(bigWindow,bigWindowParams); 
 } 
 } 
 
 /** 
 * 将大悬浮窗从屏幕上移除。 
 * 
 * @param context 
 * 必须为应用程序的Context. 
 */ 
 public static void removeBigWindow(Context context) { 
 if (bigWindow != null) { 
 WindowManager windowManager = getwindowManager(context); 
 windowManager.removeView(bigWindow); 
 bigWindow = null; 
 } 
 } 
 
 /** 
 * 更新小悬浮窗的TextView上的数据，显示内存使用的百分比。 
 * 
 * @param context 
 * 可传入应用程序上下文。 
 */ 
 public static void updateUsedPercent(Context context) { 
 if (smallWindow != null) { 
 TextView percentView = (TextView) smallWindow.findViewById(R.id.percent); 
 percentView.setText(getUsedPercentValue(context)); 
 } 
 } 
 
 /** 
 * 是否有悬浮窗(包括小悬浮窗和大悬浮窗)显示在屏幕上。 
 * 
 * @return 有悬浮窗显示在桌面上返回true，没有的话返回false。 
 */ 
 public static boolean isWindowShowing() { 
 return smallWindow != null || bigWindow != null; 
 } 
 
 /** 
 * 如果WindowManager还未创建，则创建一个新的WindowManager返回。否则返回当前已创建的WindowManager。 
 * 
 * @param context 
 * 必须为应用程序的Context. 
 * @return WindowManager的实例，用于控制在屏幕上添加或移除悬浮窗。 
 */ 
 private static WindowManager getwindowManager(Context context) { 
 if (mWindowManager == null) { 
 mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); 
 } 
 return mWindowManager; 
 } 
 
 /** 
 * 如果ActivityManager还未创建，则创建一个新的ActivityManager返回。否则返回当前已创建的ActivityManager。 
 * 
 * @param context 
 * 可传入应用程序上下文。 
 * @return ActivityManager的实例，用于获取手机可用内存。 
 */ 
 private static ActivityManager getActivityManager(Context context) { 
 if (mActivityManager == null) { 
 mActivityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); 
 } 
 return mActivityManager; 
 } 
 
 /** 
 * 计算已使用内存的百分比，并返回。 
 * 
 * @param context 
 * 可传入应用程序上下文。 
 * @return 已使用内存的百分比，以字符串形式返回。 
 */ 
 public static String getUsedPercentValue(Context context) { 
 String dir = "/proc/meminfo"; 
 try { 
 FileReader fr = new FileReader(dir); 
 BufferedReader br = new BufferedReader(fr,2048); 
 String memoryLine = br.readLine(); 
 String subMemoryLine = memoryLine.substring(memoryLine.indexOf("MemTotal:")); 
 br.close(); 
 long totalMemorySize = Integer.parseInt(subMemoryLine.replaceAll("\\D+","")); 
 long availableSize = getAvailableMemory(context) / 1024; 
 int percent = (int) ((totalMemorySize - availableSize) / (float) totalMemorySize * 100); 
 return percent + "%"; 
 } catch (IOException e) { 
 e.printstacktrace(); 
 } 
 return "悬浮窗"; 
 } 
 
 /** 
 * 获取当前可用内存，返回数据以字节为单位。 
 * 
 * @param context 
 * 可传入应用程序上下文。 
 * @return 当前可用内存。 
 */ 
 private static long getAvailableMemory(Context context) { 
 ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo(); 
 getActivityManager(context).getMemoryInfo(mi); 
 return mi.availMem; 
 } 
 
} 

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
 package="com.demo.floatwindowdemo" 
 android:versionCode="1" 
 android:versionName="1.0" > 
 
 <uses-permission android:name="android.permission.SYstem_ALERT_WINDOW" /> 
 
 <uses-sdk 
 android:minSdkVersion="8" 
 android:targetSdkVersion="8" /> 
 
 <application 
 android:allowBackup="true" 
 android:icon="@drawable/ic_launcher" 
 android:label="@string/app_name" 
 android:theme="@style/AppTheme" > 
 <activity 
 android:name="com.demo.floatwindowdemo.MainActivity" 
 android:label="@string/app_name" > 
 <intent-filter> 
 <action android:name="android.intent.action.MAIN" /> 
 
 <category android:name="android.intent.category.LAUNCHER" /> 
 </intent-filter> 
 </activity> 
 
 <service android:name=".FloatwindowService"></service> 
 </application> 
 
</manifest> 

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