画在画布上顺利缩放位图 [英] Draw smoothly scaled bitmaps on Canvas

问题描述

这是我怎么画位图在画布在我的Andr​​oid应用：

This is how I draw Bitmap on Canvas in my Android app:

canvas.save();
canvas.scale(scale, scale, x, y);
canvas.drawBitmap(bitmap, x, y, null);
canvas.restore();

然而位图不能顺利缩放，无抗锯齿进行。如何启用抗锯齿？

However the Bitmap is not scaled smoothly, no antialiasing is performed. How can I enable antialiasing?

推荐答案

试试这个：

Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);

canvas.drawBitmap(bitmap, x, y, paint);

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