从画布上删除路径 - Android电子 [英] Deleting a path from a canvas - Android

问题描述

我想从画布上删除路径或使其透明，我用下面的方法来做到这一点：

I am trying to delete a path from a canvas or make it transparent, I am using the following method to do this:

    Canvas canvas = new Canvas(bmap);
    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    paint.setColor(Color.TRANSPARENT);
    Path path=new Path();
//Add lines/arcs to path...
    paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));//tried SRC,CLEAR
    canvas.drawPath(path, paint);

但路径中填充黑色，我要特别强调透明，这可能吗？

But the path is being filled with black color, I want to make that transparent, is that possible?

推荐答案

是的，它是可能的。尝试

yes it is possible. Try

paint.setAlpha(200);

您可以将值从0到255。

you can insert values from 0 to 255.

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