Question

我有一个前台服务，该服务带有监视UDP数据包的线程。直到我将手机搁置约5分钟（但不完全是5分钟），然后它停止发送从UDP数据包获取的更新后，它才能正常工作。这是100％可复制的，而且我可以看到网络上的UDP数据包带有数据包捕获，因此我知道它们在那里。

    private class ArduinoUDPListener extends Thread {
    private MulticastSocket socket;
    private AtomicBoolean done;
    private Instant lastMsgTime;

    public void run() {

        PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);
        PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
                "MyApp::MyWakelockTag");
        wakeLock.acquire();


        WifiManager wm = (WifiManager)getSystemService(Context.WIFI_SERVICE);
        WifiManager.MulticastLock multicastLock = null;
        multicastLock = wm.createMulticastLock("udp for hamwin");
        multicastLock.acquire();
        WifiManager.WifiLock wifiLock = null;
        wifiLock = wm.createWifiLock(WifiManager.WIFI_MODE_FULL_HIGH_PERF, "wifi lock for ham");
        wifiLock.acquire();

        lastMsgTime = Instant.MIN;

        done = new AtomicBoolean(false);
        try {
            socket = new MulticastSocket(7234);
            InetAddress group = InetAddress.getByName("239.1.1.234");
            socket.joinGroup(group);
            socket.setReuseAddress(true);
            socket.setBroadcast(true);
            if (!socket.getBroadcast()) {
                socket.close();
                return;
            }
            socket.setSoTimeout(100);
            byte[] buf = new byte[65535];
            DatagramPacket p = new DatagramPacket(buf, 65535);
            while (!done.get()) {
                try {
                    socket.receive(p);
                } catch (SocketTimeoutException e) {
                    // retry
                    continue;
                } catch (IOException e) {
                    e.printStackTrace();
                    break;
                }


                // Process packet,
                //    sometimes we just stop getting here after a few minutes of normal activity if the phone is not touched.

                if (mainThreadHdlr != null) {
                    Message msg = mainThreadHdlr.obtainMessage();
                    msg.obj = update;
                    mainThreadHdlr.sendMessage(msg);
                    Log.i("Net", "Sent update");
                } else {
                    System.out.println("null?");
                }
            }
        }
        socket.close();
    }

我还应该使用其他唤醒锁吗？我还有什么其他办法可以使网络/线程保持活动状态？我什至不知道它以什么方式停止了。网络？中央处理器？其他吗？

更新添加了一些更详细的日志记录后，我发现总是会定期抛出SocketTimeoutException，但是当屏幕关闭时，UDP数据包会越来越少地发送到应用程序！我期望每秒发送一个数据包，有时在屏幕关闭时它们不会到达〜5-10秒或更长时间。

几分钟后，andriod服务线程停止工作（正在运行？）

0 个答案: