在我的应用中，我使用的是ReactiveLocationProvider库（link）。我在onCreate方法中订阅了更新。当设备在线时它工作正常但如果我关闭我的wifi并等待下一个后台位置更新设备OnErrorNotImplementedException。 这是日志：
12-30 00:05:44.711 12237-12237/koemdzhiev.com.stormy E/AndroidRuntime: FATAL EXCEPTION: main
Process: koemdzhiev.com.stormy, PID: 12237
java.lang.IllegalStateException: Exception thrown on Scheduler.Worker thread. Add `onError` handling.
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:60)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5292)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
Caused by: rx.exceptions.OnErrorNotImplementedException: Timed out waiting for response from server
at rx.Observable$27.onError(Observable.java:7535)
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:154)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:111)
at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.pollQueue(OperatorObserveOn.java:197)
at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber$2.call(OperatorObserveOn.java:170)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5292)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
Caused by: java.io.IOException: Timed out waiting for response from server
at android.location.Geocoder.getFromLocation(Geocoder.java:136)
at pl.charmas.android.reactivelocation.observables.geocode.ReverseGeocodeObservable.call(ReverseGeocodeObservable.java:34)
at pl.charmas.android.reactivelocation.observables.geocode.ReverseGeocodeObservable.call(ReverseGeocodeObservable.java:13)
at rx.Observable.unsafeSubscribe(Observable.java:7710)
at rx.internal.operators.OperatorSubscribeOn$1$1.call(OperatorSubscribeOn.java:62)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
MainActivity代码：
public class MainActivity extends AppCompatActivity {
ReactiveLocationProvider locationProvider;
Observable<List<Address>> reverseGeocodeObservable;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//-----------MY CODE STARTS HERE-----------------
//check if the user previously has seen the whats new message...
sharedPref = getPreferences(Context.MODE_PRIVATE);
editor = sharedPref.edit();
if (sharedPref.getInt(getString(R.string.saved_if_whats_new_seen), 1) != 0){
WhatsNewDialogCreator dialogCreator = new WhatsNewDialogCreator(this, sharedPref);
dialogCreator.show();
}
request = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY)
.setSmallestDisplacement(0)
.setFastestInterval(1 * 60 * 1000)
.setInterval(60 * 60 * 1000);
locationProvider = new ReactiveLocationProvider(this);
//subscribe for background location updates...
if(isNetworkAvailable()) {
startBackgroundUpdates();
}
if(isFirstTimeLaunchingTheApp) {
Log.d(TAG, "onCreate getLocation");
getLocation();
}
}
private void startBackgroundUpdates() {
subscription = locationProvider.getUpdatedLocation(request)
.subscribe(new Action1<Location>() {
@Override
public void call(Location location) {
Log.d(TAG, "Getting Background updates...");
MainActivity.this.latitude = location.getLatitude();
MainActivity.this.longitude = location.getLongitude();
numOfBackgroundUpdates++;
reverseGeocodeObservable = locationProvider
.getReverseGeocodeObservable(location.getLatitude(), location.getLongitude(), 1);
getLocationName();
}
});
}
@Override
protected void onPause() {
super.onPause();
/*
* check if onCreate there was no internet, thus = subscription == null...
* start the background updates onPause if there is internet
*/
if (subscription == null && isNetworkAvailable()){
Log.d(TAG,"startBackgroundUpdates on Pause...");
startBackgroundUpdates();
}
}
答案 0 :(得分：15)
当您尝试对该位置进行地理编码时，会发生错误。
引起：java.io.IOException：等待服务器响应超时 在android.location.Geocoder.getFromLocation（Geocoder.java:136）
当您使用一个Action1作为参数调用subscribe时，它只处理对onNext的调用，如果发生错误，应用程序将崩溃。
您需要订阅：
subscribe(new Subscriber<Location>() {
@Override
public void onNext(Location location) { /*Handle the location updates*/ }
@Override
public void onCompleted() { }
@Override
public void onError(Throwable e) { }
})
答案 1 :(得分：6)
考虑使用subscribe(Action<T> onNext, Action<Throwable> onError)订阅位置数据。换句话说，您应该处理从可观察数据中发出的错误。
答案 2 :(得分：2)
如果你仍然希望只实现一个方法并处理错误，那么你可能会有如下的抽象CustomSubscriber。
public abstract class CustomSubscriber<T> extends Subscriber<T> {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
}
@Override
public void onNext(T t) {
}
}
以这种方式实施
getObservable()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new CustomSubscriber<List<String>>() {
@Override
public void onNext(List<String> list) {
}
});