[移动开发]错误记录：FATAL EXCEPTION: main Process: com.xxxxxx.android PID: 1427

Android 应用断网后，使用OKHTTP+Retrofit+RxJava进行网络请求，应用闪退

2021-12-09 17:17:53.493 1427-1427/com.xxx.android W/System.err: io.reactivex.exceptions.OnErrorNotImplementedException: Unable to resolve host "xxx-api.xxx.com": No address associated with hostname
2021-12-09 17:17:53.494 1427-1427/com.xxx.android W/System.err:     at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:704)
2021-12-09 17:17:53.494 1427-1427/com.xxx.android W/System.err:     at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:701)
2021-12-09 17:17:53.494 1427-1427/com.xxx.android W/System.err:     at io.reactivex.internal.observers.LambdaObserver.onError(LambdaObserver.java:74)
2021-12-09 17:17:53.494 1427-1427/com.xxx.android W/System.err:     at io.reactivex.internal.operators.observable.ObservableObserveOn$ObserveOnObserver.checkTerminated(ObservableObserveOn.java:276)
2021-12-09 17:17:53.494 1427-1427/com.xxx.android W/System.err:     at io.reactivex.internal.operators.observable.ObservableObserveOn$ObserveOnObserver.drainNormal(ObservableObserveOn.java:172)
2021-12-09 17:17:53.494 1427-1427/com.xxx.android W/System.err:     at io.reactivex.internal.operators.observable.ObservableObserveOn$ObserveOnObserver.run(ObservableObserveOn.java:252)
2021-12-09 17:17:53.494 1427-1427/com.xxx.android W/System.err:     at io.reactivex.android.schedulers.HandlerScheduler$ScheduledRunnable.run(HandlerScheduler.java:109)
2021-12-09 17:17:53.494 1427-1427/com.xxx.android W/System.err:     at android.os.Handler.handleCallback(Handler.java:883)

2021-12-09 17:17:53.901 1427-1427/com.xxx.android E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.xxx.android, PID: 142
2021-12-09 17:17:53.940 1427-1427/com.xxx.android I/Process: Sending signal. PID: 1427 SIG: 9

问题原因: 网络请求失败的情况下Observable有一个异常需要显示处理，也可以通过实现另一个“Consumer<Throwable>” 来得到。

 ModelService.requestXXX(x)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Observer<ResponseModel>() {
                    @Override
                    public void onSubscribe(@io.reactivex.annotations.NonNull Disposable d) {
                        Log.i("PSF", "XXX-Observable-onSubscribe");
                    }

                    @Override
                    public void onNext(@io.reactivex.annotations.NonNull ResponseModel model) {
                        Log.i("PSF", "XXX-Observable-onNext");
                        xxxxxx(model);
                    }

                    @Override
                    public void onError(@io.reactivex.annotations.NonNull Throwable e) {
                        Log.i("PSF", "XXX-Observable-onError");
                    }

                    @Override
                    public void onComplete() {
                        Log.i("PSF", "XXX-Observable-onComplete");
                    }
                });

在断网情况下此断代码会抛出异常，修改如下:

 Disposable dis = ModelService.requestXXX()
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<ResponseModel>() {
                    @Override
                    public void accept(ResponseModel model) throws Exception {
                        Log.i("PSF", "XXX-Observable-accept");
                        xxxxxx(model);
                    }
                }, new Consumer<Throwable>() {
                    @Override
                    public void accept(Throwable throwable) throws Exception {
                        Log.i("PSF", "XXX-Observable-onError" + throwable.toString());
                    }
                });