Android系统杀死我的服务中的serversocket
我正在编写一个示例应用程序来创建 Android 上的服务器和连接到 PC 的客户端。我将服务器套接字放在服务的线程中。一切都很顺利,直到屏幕关闭几分钟后。这可能是 Android 杀死了我的服务器,我试图对我的代码设置一个完整的唤醒锁,它不会再杀死我的服务器,但是,我确实希望屏幕像往常一样关闭。 这是我的代码:
public class MessageListener extends Service {
private ServerSocket serverSocket;
@Override
public void onCreate() {
Log.v("Test", "Create service");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
PowerManager.WakeLock wl=null;
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "My Tag");
wl.acquire();
startServer();
if(wl!=null) wl.release();
return START_STICKY;
}
private Runnable thread = new Runnable() {
@Override
public synchronized void run() {
try {
serverSocket = new ServerSocket(Integer.parseInt(5000));
ObjectInputStream in = null;
while (true) {
Socket client = serverSocket.accept();
Log.v("TCP", "S: Receiving...");
try {
in = new ObjectInputStream(client.getInputStream());
DataInController data = new DataInController(
getApplicationContext());
data.processDataIn(in.readObject(), client);
} catch (ClassNotFoundException e) {
System.out.println("TCP S: Error in PC Server Listener");
e.printStackTrace();
} finally {
client.close();
}
}
} catch (IOException e) {
}
}
};
private Thread serverThread;
private synchronized void startServer() {
if (serverThread == null) {
serverThread = new Thread(thread);
serverThread.start();
}
}
private synchronized void stopServer() {
if(serverThread!=null){
Thread t=serverThread;
serverThread=null;
t.interrupt();
}
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onDestroy() {
super.onDestroy();
Log.v("TCP", "Killing Service!!!!!!!!!!!!!!!!!!!!!!!");
if (serverSocket != null) {
try {
serverSocket.close();
stopServer();
Log.v("TCP", "Closed server socket");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
I'm writing an sample app to create a Server on Android and a client to connect to PC. I put the serversocket in a thread of a service. Everything goes perfectly, until a few minutes after the screen goes off. This may be Android kill my server, I tried to put a full wake lock to my code and it wont kill anymore, however, I DO want the screen go off as usual.
Here is my code:
public class MessageListener extends Service {
private ServerSocket serverSocket;
@Override
public void onCreate() {
Log.v("Test", "Create service");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
PowerManager.WakeLock wl=null;
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "My Tag");
wl.acquire();
startServer();
if(wl!=null) wl.release();
return START_STICKY;
}
private Runnable thread = new Runnable() {
@Override
public synchronized void run() {
try {
serverSocket = new ServerSocket(Integer.parseInt(5000));
ObjectInputStream in = null;
while (true) {
Socket client = serverSocket.accept();
Log.v("TCP", "S: Receiving...");
try {
in = new ObjectInputStream(client.getInputStream());
DataInController data = new DataInController(
getApplicationContext());
data.processDataIn(in.readObject(), client);
} catch (ClassNotFoundException e) {
System.out.println("TCP S: Error in PC Server Listener");
e.printStackTrace();
} finally {
client.close();
}
}
} catch (IOException e) {
}
}
};
private Thread serverThread;
private synchronized void startServer() {
if (serverThread == null) {
serverThread = new Thread(thread);
serverThread.start();
}
}
private synchronized void stopServer() {
if(serverThread!=null){
Thread t=serverThread;
serverThread=null;
t.interrupt();
}
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onDestroy() {
super.onDestroy();
Log.v("TCP", "Killing Service!!!!!!!!!!!!!!!!!!!!!!!");
if (serverSocket != null) {
try {
serverSocket.close();
stopServer();
Log.v("TCP", "Closed server socket");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
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评论(3)
有两件事对我们有用:
Two things that worked for us:
我发现了问题。那是路由器失去了与Android的连接。我尝试ping它,它说“无法访问”,重新连接wifi后,它可以工作,但过了一会儿,它又出现了
I found the problem. That is the router lost the connection to Android. I've tried to ping it and it said "unreachable", after re connect to wifi, it works, but after a while, it comes again
还要尝试保留 WakeLock。两者都对我有用。
Also try to keep WakeLock. Doing both works for me.