将Java的位图的字节数组 [英] converting Java bitmap to byte array
本文介绍了将Java的位图的字节数组的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
Bitmap bmp = intent.getExtras().get("data");
int size = bmp.getRowBytes() * bmp.getHeight();
ByteBuffer b = ByteBuffer.allocate(size);
bmp.copyPixelsToBuffer(b);
byte[] bytes = new byte[size];
try {
b.get(bytes, 0, bytes.length);
} catch (BufferUnderflowException e) {
// always happens
}
// do something with byte[]
当我看缓冲区调用 copyPixelsToBuffer
后的字节都是0 ...位图从相机返回的是不可变的...但是这不应该无所谓,因为它做一个副本。
When I look at the buffer after the call to copyPixelsToBuffer
the bytes are all 0... The bitmap returned from the camera is immutable... but that shouldn't matter since it's doing a copy.
可能是什么不对的code?
What could be wrong with this code?
推荐答案
尝试是这样的:
Bitmap bmp = intent.getExtras().get("data");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
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