我正在使用服务检查服务器状态并注意用户。 它的工作正常，直到应用程序的活动被破坏。 即使活动被破坏但我每次都失败，我也会保留服务。 有什么建议吗？
服务：
package com.vasil.wall.chss.MP;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.os.Binder;
import android.os.Handler;
import android.support.v4.app.NotificationCompat;
import android.os.Handler;
import java.util.TimerTask;
import java.util.Timer;
import org.peter.cucker.Single;
import android.util.Log;
import android.os.AsyncTask;
import com.vasil.wall.R;
public class OpponentService extends android.app.Service {
private boolean mRunning;//state
private static String service_tag = "MyService";
private NotificationManager nm;
private static final int NOTIFICATION_ID_CONNECTED = 0;
private final int requestPeriod = 4000;//20seconds
final Handler handler = new Handler();
private Timer timer = new Timer();
private TimerTask invitesListenerServiceTask;
private InvitesManager incomingIvitesManager = new InvitesManager();
public class LocalBinder extends Binder
{
public OpponentService getService()
{
return OpponentService.this;
}
}
private final IBinder mBinder = new LocalBinder();
@Override
public IBinder onBind(final Intent intent)
{
Log.d(service_tag, "onBindService");
return mBinder;
}
@Override
public boolean onUnbind(final Intent intent)
{
Log.d(service_tag, "onUnbindService");
return super.onUnbind(intent);
}
@Override
public void onCreate()
{
mRunning = false;
super.onCreate();
Log.d(service_tag, "onCreateService");
nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
}
@Override
public int onStartCommand(final Intent intent, final int flags, final int startId)
{
if (!mRunning) {
mRunning = true;
}
ii_listener_start(MPapi.getinstance().get_gameid( getApplicationContext() ));
return START_STICKY;
//return START_NOT_STICKY;
}
@Override
public void onDestroy()
{
mRunning = false;
ii_listener_cancel();
super.onDestroy();
Log.d(service_tag, "onDestroyService");
}
public void ii_listener_start(final int createdgame_id) {
invitesListenerServiceTask = new TimerTask() {
@Override
public void run() {
handler.post(new Runnable() {
public void run() {
incomingIvitesManager.get_invites_from_server(createdgame_id);
if ( !incomingIvitesManager.RES_GETINVITES.equals("") &&
!incomingIvitesManager.RES_GETINVITES.equals("invite") ) {
ii_listener_cancel();
restoreForeground(incomingIvitesManager.RES_GETINVITES);
//stopSelf();//stop service
}
else {}
}
});
}
};
timer.schedule(invitesListenerServiceTask, 0, requestPeriod);// execute in every 4s till success
}
public void ii_listener_cancel() {
//stopSelf();//stop service
if (invitesListenerServiceTask != null)
invitesListenerServiceTask.cancel();
}
public void restoreForeground(String player2) {
final NotificationCompat.Builder notification = new NotificationCompat.Builder(OpponentService.this);
notification.setSmallIcon(R.drawable.chess_notification);
notification.setContentTitle(getString(R.string.app_name));
notification.setContentText(getString(R.string.mp_opponent_ready, player2));
notification.setContentIntent(PendingIntent.getActivity(this, 0, new Intent(this, Single.class), 0));
notification.setWhen(System.currentTimeMillis());
notification.setOngoing(true);
notification.setAutoCancel(true);
notification.setVibrate(new long[] { 1000, 1000, 1000, 1000, 1000 });
nm.notify(NOTIFICATION_ID_CONNECTED, notification.getNotification());
}
}
日志：
08-17 01:49:44.662: E/AndroidRuntime(10372): FATAL EXCEPTION: main
08-17 01:49:44.662: E/AndroidRuntime(10372): android.os.NetworkOnMainThreadException
08-17 01:49:44.662: E/AndroidRuntime(10372): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1118)
08-17 01:49:44.662: E/AndroidRuntime(10372): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
08-17 01:49:44.662: E/AndroidRuntime(10372): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
08-17 01:49:44.662: E/AndroidRuntime(10372): at java.net.InetAddress.getAllByName(InetAddress.java:214) 08-17 01:49:44.662: E/AndroidRuntime(10372): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
08-17 01:49:44.662: E/AndroidRuntime(10372): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
08-17 01:49:44.662: E/AndroidRuntime(10372): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
08-17 01:49:44.662: E/AndroidRuntime(10372): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
08-17 01:49:44.662: E/AndroidRuntime(10372): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
08-17 01:49:44.662: E/AndroidRuntime(10372): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
08-17 01:49:44.662: E/AndroidRuntime(10372): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
08-17 01:49:44.662: E/AndroidRuntime(10372): at com.vasil.wall.chss.HttpWorker.getJSONFromUrl(HttpWorker.java:173)
08-17 01:49:44.662: E/AndroidRuntime(10372): at com.vasil.wall.chss.MP.InvitesManager.get_invites_from_server(InvitesManager.java:82)
08-17 01:49:44.662: E/AndroidRuntime(10372): at com.vasil.wall.chss.MP.OpponentService$1$1.run(OpponentService.java:97)
08-17 01:49:44.662: E/AndroidRuntime(10372): at android.os.Handler.handleCallback(Handler.java:615)
08-17 01:49:44.662: E/AndroidRuntime(10372): at android.os.Handler.dispatchMessage(Handler.java:92)
08-17 01:49:44.662: E/AndroidRuntime(10372): at android.os.Looper.loop(Looper.java:137)
08-17 01:49:44.662: E/AndroidRuntime(10372): at android.app.ActivityThread.main(ActivityThread.java:4867)
08-17 01:49:44.662: E/AndroidRuntime(10372): at java.lang.reflect.Method.invokeNative(Native Method)
08-17 01:49:44.662: E/AndroidRuntime(10372): at java.lang.reflect.Method.invoke(Method.java:511)
08-17 01:49:44.662: E/AndroidRuntime(10372): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007)
08-17 01:49:44.662: E/AndroidRuntime(10372): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774)
08-17 01:49:44.662: E/AndroidRuntime(10372): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：2)
错误就像异常所说的那样，你在主（UI）线程上做网络工作。
要理解为什么你需要知道new Handler()绑定到创建它的线程，这可能是主线程，因为它是在构建服务期间创建的。
这意味着在handler.post(..)调用中完成的工作将在主线程上执行，从而导致异常。
要解决此问题，请使用AsyncTask或确保Handler在创建时绑定到其他Looper。