android - 将位图转换为字节数组而不使用 Bitmap.CompressFormat

Question

有没有办法将位图转换为字节数组而无需 Android 中的 Bitmap.CompressFormat 类？如果没有，怎么会？如果可能的话，请告诉我怎么做，thanx

Answer 1

像这样的东西？

//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.

从; https://stackoverflow.com/a/10192092/1868384