将位图转换为字节数组，不使用Bitmap.CompressFormat

Question

有没有一种在Android中不使用Bitmap.CompressFormat类将位图转换为字节数组的方法？如果没有，为什么？如果可以，请告诉我如何做，谢谢。

- Julie

Answer 1

像这样吗？

//b is the Bitmap

//calculate how many bytes our image consists of.
int bytes = b.getByteCount();
//or we can calculate bytes this way. Use a different value than 4 if you don't use 32bit images.
//int bytes = b.getWidth()*b.getHeight()*4; 

ByteBuffer buffer = ByteBuffer.allocate(bytes); //Create a new buffer
b.copyPixelsToBuffer(buffer); //Move the byte data to the buffer

byte[] array = buffer.array(); //Get the underlying array containing the data.

来自：https://dev59.com/Tmkw5IYBdhLWcg3wBl-A#10192092

- Stefan de Bruijn

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可以在不使用Bitmap.CompressFormat的情况下将此数组保存为jpg吗？@Stephan - Julie