View.getWidth()和View.getHeight()为0的根本原因是控件还没有完成绘制，你必须等待系统将绘制完View时才能获得。

@Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        if (hasFocus){
            int width = this.getMeasuredWidth();
            int height = this.getMeasuredHeight();
        }
    }