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我正在開發一個客戶端服務器應用程序，其中服務器（用Java編寫的桌面程序）通過UDP向同一無線網絡中的Android設備發送屏幕截圖。當然，由於數據報大小大於udp標準大小（65 K），我正在創建它們的片段，並使用UDP發送循環到我的Android設備。Android設備（Galaxy Note 2除外）無法獲取UDP數據包
我的問題是，它完美的作品在三星Galaxy Note 2（安卓4.2.2），但不適用於其他Android設備（甚至設備運行相同的Android版本爲前星系標籤3，銀河注1）。代碼卡在socket.receive（數據報）上，甚至沒有收到單個數據包。
有人可以幫助我嗎？
public ClientListener(int port, int fps, AppDelegate del){
delegate = del;
framesPerSecond = fps;
try{
serverAddr = getLocalIpAddress();
dgp = new DatagramPacket(buf, buf.length);
}catch (Exception e){
Log.e("ClientActivity", "C: Error", e);
}
serverPort = port;
}
public void run() {
try {
socket = new DatagramSocket(serverPort, serverAddr);
connected = true;
Timer timer = new Timer();
int frames = 1000/framesPerSecond;
Log.e("FRAMES", ""+frames);
timer.scheduleAtFixedRate(getImageTask, 0, frames);
listen();
}
catch (Exception e) {
Log.e("ClientActivity", "Client Connection Error", e);
}
}
private void listen()
{
while(connected){
try{
socket.receive(dgp); //gets stuck here on devices other than note 2
byte[] data = dgp.getData();
System.out.println("data received in datagram clientListener====="+data);
/* Read header infomation */
short session = (short) (data[1] & 0xff);
short slices = (short) (data[2] & 0xff);
int maxPacketSize = (int) ((data[3] & 0xff) << 8 | (data[4] & 0xff)); // mask
short slice = (short) (data[5] & 0xff);
int size = (int) ((data[6] & 0xff) << 8 | (data[7] & 0xff)); // mask
System.out.println("------------- PACKET -------------");
System.out.println("SESSION_START = "
+ ((data[0] & SESSION_START) == SESSION_START));
System.out.println("SSESSION_END = "
+ ((data[0] & SESSION_END) == SESSION_END));
System.out.println("SESSION NR = " + session);
System.out.println("SLICES = " + slices);
System.out.println("MAX PACKET SIZE = " + maxPacketSize);
System.out.println("SLICE NR = " + slice);
System.out.println("SIZE = " + size);
System.out.println("------------- PACKET -------------\n");
/* If SESSION_START falg is set, setup start values */
if ((data[0] & SESSION_START) == SESSION_START) {
if (session != currentSession) {
currentSession = session;
slicesStored = 0;
/* Consturct a appropreately sized byte array */
imageData = new byte[slices * maxPacketSize];
slicesCol = new int[slices];
sessionAvailable = true;
}
}
/* If package belogs to current session */
if (sessionAvailable && session == currentSession) {
if (slicesCol != null && slicesCol[slice] == 0) {
slicesCol[slice] = 1;
System.arraycopy(data, HEADER_SIZE, imageData, slice
* maxPacketSize, size);
slicesStored++;
}
}
/* If image is complete dispay it */
if (slicesStored == slices) {
ByteArrayInputStream bis = new ByteArrayInputStream(
imageData);
Bitmap bp=BitmapFactory.decodeStream(bis);
delegate.getController().setImage(bp);
Log.e("Testing", "Received image");
}