public class TranslateSurfaceView extends SurfaceView implements DrawInterface {  private DrawHandler drawHandler;  private int width;  private int height;  private Bitmap bitmap;  private int bitmapWidth;  private int bitmapHeight;  private Toast toast;  private int count = 0;   private ArrayList<MoveModel> moveList = new ArrayList<>();   public TranslateSurfaceView(Context context) {    this(context, null);  }   public TranslateSurfaceView(Context context, AttributeSet attrs) {    this(context, attrs, -1);  }   public TranslateSurfaceView(Context context, AttributeSet attrs, int defStyleAttr) {    super(context, attrs, defStyleAttr);    init();  }   private void init() {    SurfaceHolder holder = getHolder();    setZOrderOnTop(true);    holder.setFormat(PixelFormat.TRANSLUCENT);  }   @Override  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {    super.onMeasure(widthMeasureSpec, heightMeasureSpec);    width = getMeasuredWidth();    height = getMeasuredHeight();  }   public void prepare() {    DrawThread drawThread = new DrawThread();    drawThread.start();    drawHandler = new DrawHandler(drawThread.getLooper(), this);    bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon_redenvelope2);    bitmapWidth = bitmap.getWidth();    bitmapHeight = bitmap.getHeight();   }   public void addMoveModel(MoveModel moveModel) {    moveList.add(moveModel);  }   public void start() {    count = 0;    moveList.clear();    for (int i = 0; i < 10; i++) {      generateModel();    }    drawHandler.sendEmptyMessage(DrawHandler.START_DRAW_KEY);  }   public void resume() {    drawHandler.sendEmptyMessage(DrawHandler.START_DRAW_KEY);  }   public void pause() {    drawHandler.sendEmptyMessage(DrawHandler.STOP_DRAW_KEY);  }   public void quit() {    if (null != bitmap) {      bitmap.recycle();    }    if (null != drawHandler) {      drawHandler.removeCallbacksAndMessages(null);      drawHandler.getLooper().quit();    }  }   @Override  public void startDraw() {    SurfaceHolder holder = getHolder();    Canvas canvas = holder.lockCanvas();    if (null == canvas) {      return;    }     Paint paint = new Paint();    paint.setAntiAlias(true);    canvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);     for (MoveModel moveModel : moveList) {      canvas.drawBitmap(bitmap, moveModel.x, moveModel.y, paint);      if (moveModel.x > width || moveModel.y > height) {        resetMoveModel(moveModel);      } else {        moveModel.y += moveModel.randomY;      }    }    holder.unlockCanvasAndPost(canvas);    drawHandler.sendEmptyMessage(DrawHandler.START_DRAW_KEY);  }   @Override  public void stopDraw() {    drawHandler.removeMessages(DrawHandler.START_DRAW_KEY);  }   @Override  public boolean onTouchEvent(MotionEvent event) {    int action = event.getActionMasked();    switch (action) {      case MotionEvent.ACTION_DOWN:        checkInRect((int) event.getX(), (int) event.getY());        break;    }    return true;  }   /**   * 是否點擊在紅包區域   * @param x   * @param y   */  private void checkInRect(int x, int y) {    int length = moveList.size();    for (int i = 0; i < length; i++) {      MoveModel moveModel = moveList.get(i);      Rect rect = new Rect((int) moveModel.x, (int) moveModel.y, (int) moveModel.x + bitmapWidth, (int) moveModel.y + bitmapHeight);      if (rect.contains(x, y)) {        count++;        resetMoveModel(moveModel);        if (toast == null) {          toast = Toast.makeText(getContext(), "", Toast.LENGTH_SHORT);        }        toast.setText("搶到紅包" + count);        toast.show();        break;      }    }  }   private void resetMoveModel(MoveModel moveModel) {    Random random = new Random();    moveModel.x = random.nextInt(11) * (width / 10);    moveModel.y = 0;    moveModel.randomY = (random.nextInt(5) + 2) * getResources().getDisplayMetrics().density * 1.4f;  }   private void generateModel() {    Random random = new Random();    MoveModel moveModel = new MoveModel();    moveModel.moveId = moveList.size() + 1;    moveModel.x = random.nextInt(11) * (width / 10);    moveModel.y = 0;    moveModel.randomY = (random.nextInt(5) + 2) * getResources().getDisplayMetrics().density * 1.4f;    moveList.add(moveModel);  }}