将不可变位图文件转换为可变位图 [英] Convert immutable Bitmap file to mutable Bitmap

问题描述

A:

 Bitmap immutableBmp= BitmapFactory.decodeResource(getApplicationContext().getResources(),R.drawable.sample);
 mutableBitmap=immutableBmp.copy(Bitmap.Config.ARGB_8888, true);

B:

Bitmap immutableBmp= BitmapFactory.decodeFile(filePath);
mutableBitmap=immutableBmp.copy(Bitmap.Config.ARGB_8888, true);

C:

BitmapFactory.Options options = new BitmapFactory.Options();
options.inMutable=true;
myBitmap=BitmapFactory.decodeFile(filePath,options);

A有效，而B和C无效.我试图将不可变的位图转换为可变的.它适用于资源映像，但不适用于文件映像.有什么问题?

A works but B and C don't. I am trying to convert an immutable bitmap to mutable. It works on resource images but not file images. What's the problem?

推荐答案

我发现了问题！上面的所有3种方法都可以使用，但是我的图像分辨率存在问题，所以我认为代码无法正常工作，并且不可变，但是我错了.这是将不可变图像更改为可变的另一种解决方案.

I have found the problem! All of the 3 methods above are working, there was a problem with the resolution of my image, so I thought the code didn't work and it was not mutable but I was wrong. Here is another solution to change immutable image to mutable.

BitmapFactory.decodeResource在Android 2.2中返回可变的位图，在Android 1.6中返回不可变的位图

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