读取所有输入流后仍然 SkImageDecoder::Factory 返回 null

Question

我正在尝试将屏幕截图从桌面发送到 android，并在 android 上显示。据我所知，返回 null 可能是因为我没有 inputStream.read() 读取所有输入流，因此我创建了一个 while 循环来读取所有输入流然后显示。桌面还发送了字节数组的大小，为了让android设置字节数组的大小，代码如下：

public class connection extends AsyncTask {
    private byte[] data;

    public void setByteSize(int size) {
        data = new byte[size];

    }

    public byte[] getByteSize() {
        return data;

    }

    @Override
    protected Object doInBackground(Object... arg0) {

        try {
            clientSocket = new Socket("134.129.125.126", 8080);
            System.out.println("client connect to server");
            input = clientSocket.getInputStream();
            System.out.println("getinputstream");
        } catch (UnknownHostException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }

        while (true) {
            int totalBytesRead = 0;
            int chunkSize = 0;
            int tempRead = 0;
            String msg = null;
            // byte[] data = null;

            byte[] tempByte = new byte[1024 * 1024 * 4];
            try {
                // read from the inputstream
                tempRead = input.read(tempByte);
                // tempbyte has x+4 byte

                System.out.println("Fist time read:" + tempRead);
                // convert x+4 byte into String

                String message = new String(tempByte, 0, tempRead);
                msg = message.substring(0, 4);
                // cut the header into imageMsg
                String imageMsg = new String(tempByte, 4, tempRead - 4);
                // convert string into byte
                System.out.println("message head:" + msg);
                byteSize = Integer.parseInt(msg);
                System.out.println("ByteSize:" + byteSize);
                data = imageMsg.getBytes();
                setByteSize(byteSize);

                totalBytesRead = tempRead - 4;
                System.out.println("total Byte Read=" + totalBytesRead);

            } catch (IOException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }

            // get string for the size of image

            try {
                int tmp = 0;

                while (chunkSize > -1) {
                    System.out.println("data length:"
                            + getByteSize().length);
                    chunkSize = input.read(getByteSize(), totalBytesRead,
                            getByteSize().length - totalBytesRead);
                    System.out.println("chunkSize is " + chunkSize);
                    System.out.println("iteration id = " + tmp);
                    tmp++;
                    totalBytesRead += chunkSize;
                    // System.out.println("Total byte read "
                    // + totalBytesRead);
                    if (totalBytesRead == getByteSize().length) {
                        break;

                    }
                }

                System.out.println("Complete reading - total read = "
                        + totalBytesRead);
            } catch (Exception e) {

            }

            bitmap = BitmapFactory.decodeByteArray(getByteSize(), 0,
                    getByteSize().length);

            System.out.println("deco");

            runOnUiThread(new Runnable() {
                public void run() {

                    image.setImageBitmap(bitmap);
                    System.out.println("setImage at less than 500");

                }
            });
        }

    }

}

这是我的解码结果，我想我已经阅读了所有的，但它仍然不允许我返回图像

10-21 23:25:15.203: I/System.out(7222): Fist time read:1452
10-21 23:25:15.203: I/System.out(7222): message head:3359
10-21 23:25:15.203: I/System.out(7222): ByteSize:3359
10-21 23:25:15.203: I/System.out(7222): total Byte Read=1448
10-21 23:25:15.203: I/System.out(7222): data length:3359
10-21 23:25:15.203: I/System.out(7222): chunkSize is 1911
10-21 23:25:15.203: I/System.out(7222): iteration id = 0
10-21 23:25:15.213: I/System.out(7222): Complete reading - total read = 3359
10-21 23:25:15.213: D/skia(7222): --- SkImageDecoder::Factory returned null

Answer 1

好的，我想通了。原因是因为我使用了setByteSize(int size)，这个方法会创建一个新的byte[]，导致它变成null。