自定义垂直进度条

public class VerticalProgressBar extends ProgressBar {    public VerticalProgressBar(Context context) {        super(context);    }        public VerticalProgressBar(Context context, AttributeSet attrs) {        super(context, attrs);    }    public VerticalProgressBar(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);    }/** * 翻转画布 */@Overrideprotected synchronized void onDraw(Canvas canvas) {canvas.rotate(-90);canvas.translate(-this.getHeight(), 0);super.onDraw(canvas);}}