拖動控件,最終停靠在屏幕右側

關鍵代碼:

    int sx = 0;
    int sy = 0;

    int x = 0;
    int y = 0;

    int finalY = 0;

    @Override
    public boolean onTouchEvent(MotionEvent event) {

        switch (event.getAction()) {

            case MotionEvent.ACTION_DOWN:
                x = (int) imageView.getX();
                y = (int) imageView.getY();

                sx = (int) (event.getX());
                sy = (int) (event.getY());

                break;
            case MotionEvent.ACTION_MOVE:

                int tempx = (int) (event.getX() - sx);
                int tempy = (int) (event.getY() - sy);
                imageView.setX(x + tempx);
                imageView.setY(y + tempy);

                finalY = y + tempy;

                break;
            case MotionEvent.ACTION_UP:

                imageView.setX(1080 - imageView.getWidth());
                imageView.setY(finalY);

                break;
        }

        return super.onTouchEvent(event);
    }