检查边缘及计算高度

private boolean checkBounds(TextView v, MotionEvent event) { 
    // 全局视图最外层一个View (the View that holds the UI) 
    View globalView = ...; // the main view of activity/application 
    DisplayMetrics dm = new DisplayMetrics(); 
    this.getWindowManager().getDefaultDisplay().getMetrics(dm); 
    int topOffset = dm.heightPixels - globalView.getMeasuredHeight(); 
 
        int[] origin = new int[2]; 
        v.getLocationOnScreen(origin); 
 
    final int x = origin[0]; 
    final int y = origin[1] - topOffset; 
 
 
        if ((event.getX() > x) && (event.getX() < (x + v.getMeasuredWidth()))) { 
            if ((event.getY() > y) && (event.getY() < (y + v.getMeasuredHeight()))) { 
                return true; 
            } 
        } 
    return false; 
}