ScaleProgressBar Loading效果

这个demo是鸣人叫我做的效果，大家用的时候根据实际需要再调整参数。

先看效果图：

主要构思：当progress到最大值的时候触发动画效果，效果都由canvas画布上进行。

主要代码：

@Override
	protected void onDraw(Canvas canvas) {
		int halfWidth = getWidth() / 2;
		int halfHeight = getHeight() /2;
		//this way to draw the path for progress
		if(progress<MAX_PROGRESS){
			canvas.drawColor(COLOR_TRANSLUCENT);
			pRectF.top = halfHeight - RADIUS_PROGRESS;
			pRectF.bottom = halfHeight + RADIUS_PROGRESS;
			pRectF.left = halfWidth - RADIUS_PROGRESS;
			pRectF.right = halfWidth + RADIUS_PROGRESS;
			canvas.drawArc(pRectF, -90, ((float)progress/(float)MAX_PROGRESS)*360, false, pPaint);
			canvas.save();
		//this way to draw the images when animation start
		}else{
			int alter = progress-MAX_PROGRESS;
			Path path = new Path();
			path.addRect(0, 0,getWidth(),getHeight(),Path.Direction.CW);
			path.addCircle(halfWidth, halfHeight,RADIUS_BIG_CIRCLE+alter*ALTER_LENTH,Path.Direction.CCW);
			canvas.drawPath(path, squarePaint);
			canvas.drawCircle(halfWidth, halfHeight, RADIUS_PROGRESS-alter*ALTER_LENTH, sCirclePaint);
			canvas.save();
		}
		super.onDraw(canvas);
	}

P.S
感谢7heaven告诉Path的用法

下载地址 ：https://github.com/arjinmc/ScaleProgressBar