我正在使用RxJava，RxAndroid和Retrofit2创建此应用程序。我对Retrofit2的询问：
@POST("auth/sign_in")
Observable<Response<AccountEntity>> signIn(@Header("email") String email, @Header("password") String password);
登录API的Observable：
public Observable<AccessToken> signIn(String user, String pass) {
return netService.signIn(user, pass).flatMap(new Func1<Response<AccountEntity>, Observable<AccessToken>>() {
@Override
public Observable<AccessToken> call(final Response<AccountEntity> accountEntityResponse) {
AccountEntity accountEntity = accountEntityResponse.body();
diskAccountDataStore.createAccount(accountToAccountEntityMapper.reverseMap(accountEntity)).subscribe();
return Observable.create(new Observable.OnSubscribe<AccessToken>() {
@Override
public void call(Subscriber<? super AccessToken> subscriber) {
AccessToken accessToken = new AccessToken.AccesTokenBuilder()
.accessToken(accountEntityResponse.headers().get(AccessToken.ACCESS_TOKEN))
.tokenType(accountEntityResponse.headers().get(AccessToken.TOKEN_TYPE))
.client(accountEntityResponse.headers().get(AccessToken.CLIENT))
.expiry(accountEntityResponse.headers().get(AccessToken.EXPIRY))
.uid(accountEntityResponse.headers().get(AccessToken.UID))
.build();
subscriber.onNext(accessToken);
}
});
}
});
}
订阅者：
private final class SignInSubscriber extends DefaultSubscriber<AccessToken> {
@Override
public void onCompleted() {
super.onCompleted();
}
@Override
public void onError(Throwable e) {
super.onError(e);
if (e instanceof HttpException) {
ResponseBody responseBody = ((HttpException) e).response().errorBody();
getView().signInError(getErrorMessage(responseBody));
} else if (e instanceof SocketTimeoutException)
getView().signInError("Connection timeout");
else if (e instanceof IOException)
getView().signInError("Network error");
else
getView().signInError("Wrong credentials");
}
@Override
public void onNext(AccessToken token) {
super.onNext(token);
getView().signInSuccess(token);
}
private String getErrorMessage(ResponseBody responseBody) {
try {
JSONObject jsonObject = new JSONObject(responseBody.string());
return jsonObject.getString("errors");
} catch (Exception e) {
return e.getMessage();
}
}
}
此代码工作正常，但有时它会抛出一个异常，导致我的应用程序崩溃，这是日志。我已经尝试了很多方法来处理它，但它仍然令人心烦意乱。我明白是什么意思，它试图调用onError方法，但后来又抛出了另一个不可挽回的错误。：
FATAL EXCEPTION: main
Process: com.app, PID: 26813
java.lang.IllegalStateException: Fatal Exception thrown on Scheduler.Worker thread.
at rx.android.schedulers.LooperScheduler$ScheduledAction.run(LooperScheduler.java:114)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: rx.exceptions.OnErrorFailedException: Error occurred when trying to propagate error to Observer.onError
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:187)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:115)
at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.checkTerminated(OperatorObserveOn.java:273)
at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.call(OperatorObserveOn.java:216)
at rx.android.schedulers.LooperScheduler$ScheduledAction.run(LooperScheduler.java:107)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: rx.exceptions.CompositeException: 2 exceptions occurred.
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:187)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:115)
at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.checkTerminated(OperatorObserveOn.java:273)
at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.call(OperatorObserveOn.java:216)
at rx.android.schedulers.LooperScheduler$ScheduledAction.run(LooperScheduler.java:107)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: rx.exceptions.CompositeException$CompositeExceptionCausalChain: Chain of Causes for CompositeException In Order Received =>
at android.util.Log.getStackTraceString(Log.java:508)
at com.android.internal.os.RuntimeInit.Clog_e(RuntimeInit.java:60)
at com.android.internal.os.RuntimeInit.access$200(RuntimeInit.java:44)
at com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException(RuntimeInit.java:92)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:693)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:690)
at rx.android.schedulers.LooperScheduler$ScheduledAction.run(LooperScheduler.java:118)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: java.net.SocketTimeoutException
at java.net.PlainSocketImpl.read(PlainSocketImpl.java:484)
at java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:37)
at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:237)
at okio.Okio$2.read(Okio.java:139)
at okio.AsyncTimeout$2.read(AsyncTimeout.java:237)
at okio.RealBufferedSource.indexOf(RealBufferedSource.java:345)
at okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:217)
at okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:211)
at okhttp3.internal.http1.Http1Codec.readResponseHeaders(Http1Codec.java:189)
at okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:75)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:45)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:185)
at okhttp3.RealCall.execute(RealCall.java:69)
at retrofit2.OkHttpCall.execute(OkHttpCall.java:180)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:171)
at rx.Subscriber.setProducer(Subscriber.java:211)
at rx.interna