如何画一个透明的圆?
我想画一个透明的圆圈,但它不起作用。
当我绘制位图时它可以工作,但圆圈不会变得透明。
简而言之,这是我的代码:
Paint paint = new Paint();
paint.setAlpha(125);
canvas.drawBitmap(bitmap, sourceRect, destRect, paint); // this works fine
canvas.drawCircle(x, y, radius, paint); // the circle is drawn but not transparent
I'm trying to draw a transparent circle, but it just doesn't work.
when I'm drawing a bitmap it works, but a circle doesn't become transparent.
Here's my code in short:
Paint paint = new Paint();
paint.setAlpha(125);
canvas.drawBitmap(bitmap, sourceRect, destRect, paint); // this works fine
canvas.drawCircle(x, y, radius, paint); // the circle is drawn but not transparent
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我找到了。
paint.setAlpha
必须位于paint.setColor
之后I found it.
paint.setAlpha
must come afterpaint.setColor