大佬们有没有用过 Canvas 画图的 - V2EX

大佬们有没有用过 Canvas 画图的 - V2EX

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这是一个创建于 2892 天前的主题，其中的信息可能已经有所发展或是发生改变。

开了一个线程画线。。然后画到一定程度清屏。我用了清屏的方法

 Canvas canvas = mSurfaceHolder.lockCanvas(); Paint p = new Paint(); p.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR)); canvas.drawPaint(p); p.setXfermode(ew PorterDuffXfermode(PorterDuff.Mode.SRC)); mSurfaceHolder.unlockCanvasAndPost(canvas);

调用之后，屏幕闪烁，未清掉。。然后。。我把这段代码循环了 10 次。。清掉了。。这到底是为什么。。

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