Oreo-窗口小部件服务和广播接收器:不允许启动服务意图

时间:2018-06-22 08:52:46

标签: android android-intent service broadcastreceiver android-8.0-oreo

我有一个监视wifi连接的小部件,所以我启动了一项服务来启动广播接收器以检测网络变化。一切正常,除非我退出主应用程序:服务停止。

因此,我在小部件中启动了一个警报管理器,该警报管理器大约每分钟醒来一次,并检查主应用程序是否已退出。如果是这种情况,我尝试重新启动wifi监控服务,这次它崩溃并显示以下消息:

  

不允许启动服务意图{   cmp = package .CallbackNetworkWidgetService(有其他功能)}:应用程序已在   后台uid UidRecord {f6e65b9 u0a154 RCVR空闲更改:空闲|未缓存   procs:1 seq(0,0,0)}

问题出在oreo新的意图/服务模型上。直到牛轧糖都可以使用。

问题:

  1. 我的方法正确吗?

  2. 我对前台/后台服务的概念有些迷惑。小部件是背景svce? wifi监控服务/ BR还是后台服务吗?

  3. 这是什么问题?

清单:

<receiver android:name=".Widget.TestWidget">
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
            </intent-filter>
            <intent-filter>
                <action android:name="AUTO_UPDATE" />
            </intent-filter>
            <meta-data
                android:name="android.appwidget.provider"
                android:resource="@xml/test_widget_info" />
        </receiver>

        <service android:name=".Widget.CallbackNetworkWidgetService"></service>

CallbackWidgetNetworkService

@Override
public int onStartCommand(Intent i, int flags, int startId) {
    context = this.getApplicationContext();
    Log.i("WIDNET", "onStart network");

    isWifiConnected();

    return Service.START_NOT_STICKY;
}

public void isWifiConnected(){

    BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            getNetworkInfo();
          //  Log.i("WIDNET", "broadcastReceiver ipwan: "+ipwan+" type: "+type);
        }
    };

    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);

    context.registerReceiver(broadcastReceiver, intentFilter);
}

Appwidget-startNetworkService

 public static void startNetworkService(Context context){
        int[] allWidgetIds = new int[0];

        Log.i("WIDNET", "start network service");
        ComponentName thisWidget = new ComponentName(context,
                TestWidget.class);
        if(widgetManager != null)
            allWidgetIds = widgetManager.getAppWidgetIds(thisWidget);

        if(intentNetwork != null) {
            CallbackNetworkWidgetService cnws = new CallbackNetworkWidgetService();
            cnws.stopSelf();
            Log.i("WIDNET", "stop network service");
        }

        intentNetwork = new Intent(context.getApplicationContext(),
                CallbackNetworkWidgetService.class);
        intentNetwork.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, allWidgetIds);

        context.startService(intentNetwork);
    }

1 个答案:

答案 0 :(得分:2)

您需要为此使用前台服务。

ContextCompat.startForegroundService(context, intentNetwork);

不要忘记api 26+的通知:

@Override
public int onStartCommand(Intent i, int flags, int startId) {
   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
      Notification.Builder builder = new Notification.Builder(this, ANDROID_CHANNEL_ID)
            .setContentTitle("wifi listener bla bla bla")
            .setContentText(text)
            .setAutoCancel(true);

      Notification notification = builder.build();
      startForeground(1, notification);
   }
   //...
}