Android Studio中的ExecutionException被拒绝

Question

我的应用程序（使用HERE Android SDK）在进行模拟逐轮导航时崩溃，异常日志如下，请告诉如何解决。

设备型号：SM-G9008V
SDK：5.0----------java.util.courrent.RejectedExecutionException：任务android.os.AsyncTask$3@36d584c9被拒绝java.util.concurrent.ThreadPoolExecutor@23d4f7ce[跑步，游泳池大小=9，活动线程=9，排队任务=128，已完成任务=828]java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution（ThreadPoolExecutor.java:2011）java.util.concurrent.ThreadPoolExecutor.reject（ThreadPoolExecutor.java:793）java.util.concurrent.ThreadPoolExecutor.execute（ThreadPoolExecutor.java:1339）android.os.AsyncTask.executeOnExecutor（AsyncTask.java:590）com.nokia.maps.bf.c（LocationRestHandler.java:207）com.nokia.maps.bf.b（LocationRestHandler.java:198）com.nokia.maps.dn.b（PlacesVerseGeocodeRequest.java:256）com.nokia.maps.dn.a（PlacesVerseGeocodeRequest.java:28）com.nokia.maps.dn$1.run（PlacesVerseGeocodeRequest.java:104）android.os.Handler.handleCallback（Handler.java:739）android.os.Handler.dispatchMessage（Handler.java:95）android.os.Looper.loop（Looper.java:145）android.app.ActivityThread.main（ActivityThread.java：5835）java.lang.reflect.Method.ioke（本机方法）java.lang.reflect.Method.ioke（Method.java:372）com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run（ZygoteInit.java：1399）com.android.internal.os.ZygoteInit.main（ZygoteNit.java:1194）

Answer 1

您是否同时发出多个请求？您似乎发出了太多请求，并且超过了未处理的最大数量：

java.util.concurrent.ThreadPoolExecutor@23d4f7ce[正在运行，池大小=9，活动线程=9，排队任务=128，已完成任务=828]

你在导航代码中做什么？你能发布一个片段吗？

Answer 2

为什么我会收到这个错误消息？

如果超过了ThreadPoolExecutor可以排队的任务数，则会收到此错误消息。唯一一次抛出RejectedExecutionException是由默认RejectedExecutionHandler的ThreadPoolExecutor.AbortPolicy引发的。

引用javadocs:

如果请求无法排队，则会创建一个新线程，除非将超过最大PoolSize，在这种情况下，任务将被拒绝。

有最大数量的任务。请参阅此处的问题/答案：同时执行的AsyncTasks有限制吗？

Answer 3

@David，下面是代码片段：

if(navigationManager == null) {
            navigationManager = NavigationManager.getInstance();
            navigationManager.setMap(map);
        }
        // start listening to navigation events
        instructListener = new InstructListener();
        navigationManager.addNewInstructionEventListener(
                new WeakReference<NavigationManager.NewInstructionEventListener>(instructListener));
        // start listening to position events
        if (naviPositionListener == null) {
            naviPositionListener = new NaviPositionListener();
        }
        navigationManager.addPositionListener(
                new WeakReference<NavigationManager.PositionListener>(naviPositionListener));
        if (maneuverEventListener == null) {
            maneuverEventListener = new ManeuverEventListener();
        }
        navigationManager.addManeuverEventListener(
                new WeakReference<NavigationManager.ManeuverEventListener>(maneuverEventListener));

        if (myNavigationManagerEventListener == null) {
            myNavigationManagerEventListener = new MyNavigationManagerEventListener();
        }
        navigationManager.addNavigationManagerEventListener(new WeakReference<NavigationManager.NavigationManagerEventListener>(myNavigationManagerEventListener));
        if (rerouteListener == null) {
            rerouteListener = new MyRerouteListener();
        }
        navigationManager.addRerouteListener(new WeakReference<RerouteListener>(rerouteListener));
        if (safetySpotListener == null) {
            safetySpotListener = new MySafetySpotListener();
        }
        navigationManager.addSafetySpotListener(new WeakReference<NavigationManager.SafetySpotListener>(safetySpotListener));
        //add realistic view listener
        navigationManager.setRealisticViewMode(NavigationManager.RealisticViewMode.DAY);
        navigationManager.addRealisticViewAspectRatio(NavigationManager.AspectRatio.AR_4x3);
        if (realisticViewListener == null) {
            realisticViewListener = new MyRealisticViewListener();
        }
        navigationManager.addRealisticViewListener(
                new WeakReference<NavigationManager.RealisticViewListener>(realisticViewListener));

        //set map udpate mode
        navigationManager.setMapUpdateMode(NavigationManager.MapUpdateMode.ROADVIEW);
        navigationManager.setTrafficAvoidanceMode(NavigationManager.TrafficAvoidanceMode.DISABLE);
        //set natural guidance mode
        EnumSet<NavigationManager.NaturalGuidanceMode> modeset = navigationManager.getNaturalGuidanceMode();
        modeset.add(NavigationManager.NaturalGuidanceMode.TRAFFIC_LIGHT);
        modeset.add(NavigationManager.NaturalGuidanceMode.STOP_SIGN);
        modeset.add(NavigationManager.NaturalGuidanceMode.JUNCTION);
        navigationManager.setNaturalGuidanceMode(modeset);
        // add gps signal listener
        if (gpsSignalListener == null) {
            gpsSignalListener = new MyGpsSignalListener();
        }
        navigationManager.addGpsSignalListener(new WeakReference<NavigationManager.GpsSignalListener>(gpsSignalListener));

        if (speedWarningListener == null) {
            speedWarningListener = new MySpeedWarningListener();
        }
        navigationManager.addSpeedWarningListener(new WeakReference<NavigationManager.SpeedWarningListener>(speedWarningListener));
        //add lane info listener
        if (laneInfoListener == null) {
            laneInfoListener = new MyLaneInfoListener();
        }
        navigationManager.addLaneInfoListener(new WeakReference<NavigationManager.LaneInfoListener>(laneInfoListener));

        navigationManager.getRoadView().setOrientation(NavigationManager.RoadView.Orientation.DYNAMIC);
        navigationManager.getRoadView().addListener(new WeakReference<NavigationManager.RoadView.Listener>(roadViewListener));

        //start navigation
        long speed = 60; // meter per second
    navigationManager.simulate(mapRoute.getRoute(), speed);