如何在android中用不透明度填充矩形

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时间:2020-08-20 03:23:00  来源:igfitidea点击:

How to fill rectangle with opacity in android

androidandroid-canvas

提问by R4j

I can fill rectangle with canvas draw rect:

我可以用画布绘制矩形填充矩形:

Rect rt = new Rect(0, 0, getWidth(), getHeight());
myPaint.setColor(myColor);
myPaint.setStyle(Style.FILL);
canvas.drawRect(rt, myPaint);

But I need the method to fill rectangle with the opacity (in percent, with 0% is TRANSPARENT).
How can I do that?

但我需要用不透明度填充矩形的方法(以百分比表示,0% 是透明的)。
我怎样才能做到这一点?

回答by Mohammed Azharuddin Shaikh

You can use the Alphaproperty of Paint class.

您可以使用Paint 类Alpha属性。

myPaint.setAlpha(10);will help you.

myPaint.setAlpha(10);会帮助你。