Android 手势监听（转）

原文地址：
Android开发之手势滑动（滑动手势监听）详解

/** 记录按下的坐标点（起始点）**/
private float mPosX = 0;
private float mPosY = 0;

/** 记录移动后抬起坐标点（终点）**/
private float mCurPosX = 0;
private float mCurPosY = 0;

View.setOnTouchListener(new OnTouchListener() {

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        // TODO Auto-generated method stub
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                mPosX = event.getX();
                mPosY = event.getY();
                tvTip.setVisibility(View.VISIBLE);
                break;
            case MotionEvent.ACTION_MOVE:
                mCurPosX = event.getX();
                mCurPosY = event.getY();

                break;
            case MotionEvent.ACTION_UP:
                float dx = Math.abs(mCurPosX - mPosX);
                float dy = Math.abs(mCurPosY - mPosY);
                // 横向滑动
                if (dx > dy * 3) {
                    drawerLayout.openDrawer(GravityCompat.START);
                    if (tvTip.getVisibility() == View.VISIBLE)
                        tvTip.setVisibility(INVISIBLE);
                }
                // 纵向滑动
                else if (dx * 3 < dy)
                    tvTip.setVisibility(View.INVISIBLE);
                break;            
        }
        // 返回 true，会消耗掉此事件，系统不再响应滑动手势
        // 返回 false，不消耗掉此事件，系统继续响应滑动手势消息
        return true;
    }

});