代码动态设置远角

代码动态设置圆角，使用Canvas绘制

	private Paint mPaint;
	private float mRadius;

private void init(){

		LogHelper.debugLog(mTAG, "init w="+getWidth()+"/h="+getHeight());
		
		mRadius = Util.convertIn(6);
		mPaint = new Paint();
		mPaint.setAntiAlias(true);
		mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));

	}

	@Override
	public void draw(Canvas canvas) {
		// TODO Auto-generated method stub
		LogHelper.debugLog(mTAG, "draw w="+getWidth()+"/h="+getHeight());
		
		Bitmap bitmap = Bitmap.createBitmap(getWidth(), getHeight(), Config.ARGB_8888);
		Canvas canvas2 = new Canvas(bitmap);
		super.draw(canvas2);
		
		Path path = new Path();
		path.addRect(new RectF(0, 0, getWidth(), getHeight()), Direction.CW);
		path.addRoundRect(new RectF(0, 0, getWidth(), getHeight()), mRadius, mRadius, Direction.CCW);
		canvas2.drawPath(path, mPaint);
		canvas.drawBitmap(bitmap, 0, 0, null);
		bitmap.recycle();

	}