Question

我通过套接字接收jpg图像，它作为ByteBuffer发送我在做的是：

        ByteBuffer receivedData ;
        // Image bytes
        byte[] imageBytes = new byte[0];
        // fill in received data buffer with data
        receivedData=  DecodeData.mReceivingBuffer;
        // Convert ByteByffer into bytes
        imageBytes = receivedData.array();
        //////////////
        // Show image
        //////////////
        final Bitmap bitmap = BitmapFactory.decodeByteArray(imageBytes,0,imageBytes.length);
        showImage(bitmap1);

但是它无法解码imageBytes和位图的情况是空的。

此外，我将imagebytes视为： imageBytes：{-1，-40，-1，-32,0,16,74,70,73,70,0,1,1,1,0,96,0,0,0,0，-1， -37,0,40,28,30,35，+ 10,478更多}

会出现什么问题？是解码问题吗？或者从ByteBuffer转换为Byte数组？

提前感谢您的帮助。

Answer 1

ByteBuffer buf = DecodeData.mReceivingBuffer;
byte[] imageBytes= new byte[buf.remaining()];
buf.get(imageBytes);
final Bitmap bmp=BitmapFactory.decodeByteArray(imageBytes,0,imageBytes.length);
    showImage(bmp);

OR

＆＃13;

// Create a byte array
byte[] bytes = new byte[10];

// Wrap a byte array into a buffer
ByteBuffer buf = ByteBuffer.wrap(bytes);

// Retrieve bytes between the position and limit
// (see Putting Bytes into a ByteBuffer)
bytes = new byte[buf.remaining()];

// transfer bytes from this buffer into the given destination array
buf.get(bytes, 0, bytes.length);

// Retrieve all bytes in the buffer
buf.clear();
bytes = new byte[buf.capacity()];

// transfer bytes from this buffer into the given destination array
buf.get(bytes, 0, bytes.length);

 final Bitmap bmp=BitmapFactory.decodeByteArray(bytes,0,bytes.length);
showImage(bmp);

＆＃13;

使用任何一个将BYTEBUFFER转换为BYTE ARRAY并将其转换为BITMAP并将其设置为您的IMAGEVIEW。

希望这会对你有所帮助。

Answer 2

这个适用于我（对于ARGB_8888像素缓冲区）：

private Bitmap getBitmap(Buffer buffer, int width, int height) {
    buffer.rewind();
    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    bitmap.copyPixelsFromBuffer(buffer);
    return bitmap;
}

如何在Android中将ByteBuffer转换为图像

2 个答案: