为什么我在 Android 中杀死我的应用程序时服务会重新启动？

Question

尝试使用 android 中的服务保持 xmpp 连接处于活动状态

public class XMPPService extends Service {

XMPPTCPConnection connection;
String USERNAME;
String PASSWORD;

public XMPPService() {
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    onHandleIntent();
    return START_STICKY;
}

private void onHandleIntent() {
    connection = XMPPClient.getConnection();
    connection.addConnectionListener(
            new AbstractConnectionListener() {
                public void connectionClosed() {
                    Log.i("connection", "closed");

                }

                public void connectionClosedOnError(Exception e) {
                    Log.i("connection", "closed on error");

                }

                public void reconnectionFailed(Exception e) {
                    Log.i("reconnection", "failed");

                }

                public void reconnectionSuccessful() {
                    if (connection.isAuthenticated()) {
                        Log.i("isauthenticauted : ", String.valueOf(connection.isAuthenticated()));
                        Log.i("reconnection", "succesful");
                    } else {
                        try {
                            connection.login(USERNAME, PASSWORD);
                        } catch (XMPPException e) {
                            e.printStackTrace();
                        } catch (SmackException e) {
                            e.printStackTrace();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                        Log.i("reconnection", "succesful");
                    }
                }

                public void reconnectingIn(int seconds) {
                    Log.i("reconnectingIn", String.valueOf(seconds));
                }

            }
    );
}



@Override
public void onCreate() {
    Log.i("service", "created");

}

@Override
public IBinder onBind(Intent intent) {
    // TODO: Return the communication channel to the service.
    throw new UnsupportedOperationException("Not yet implemented");
}

}

当我杀死我的应用程序时，我的服务会重新启动。为什么会这样？当我重新启动时，它给我一个异常 NetworkOnMainThreadException at connection = XMPPClient.getConnection(); 当我杀死我的应用程序时，我不希望我的服务重新启动。

Answer 1

START_STICKY 标志会导致您的服务在销毁时自动重启。您的 onstartCommand 应该返回 START_NOT_STICKY 而不是 START_STICKY。

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    onHandleIntent();
    return START_NOT_STICKY;
}

Answer 2

在服务的 onStartCommand(Intent, int, int) 函数中使用 START_NOT_STICKY。

示例： public static final int START_NOT_STICKY http://developer.android.com/reference/android/app/Service.html