保存PNG Drawable Android [英] Saving PNG Drawable Android

问题描述

我知道如何使用Bitmap.compress()保存图像，但是我真的想将图像保存为具有Alpha透明性的PNG，而使用Bitmap只会扼杀我的工作.我可以将其另存为不透明的PNG，但不能另存为透明的PNG文件.

I know how to save an image with Bitmap.compress(), but I really want to save the image as a PNG with its alpha-transparency, and using Bitmap just kills my efforts. I can save it as a opaque PNG, but not as a transparent PNG file.

有什么办法吗?

谢谢.

推荐答案

尝试一下.我还没有测试过，但是应该可以.

Try this out. I haven't tested it but it should work.

Bitmap bitmap = Bitmap.createBitmap(width, height, Config.ARGB_8888);
OutputStream stream = new FileOutputStream("/sdcard/test.png");
bitmap.compress(CompressFormat.PNG, 100, stream);
stream.close();

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