我用下面的代码包装监听器，
public Observable<String> getIdToken() {
return Observable.create(emitter -> {
firebaseAuth.getAccessToken(false)
.addOnSuccessListener(getTokenResult -> {
emitter.onNext(getTokenResult.getToken());
})
.addOnFailureListener(e -> {
if (e instanceof FirebaseAuthInvalidUserException) {
emitter.onError(new BaseException("", ERR_CODE_ACCOUNT_BANNED));
} else {
emitter.onError(e);
}
});
});
}
public Observable<BaseResponse> register() {
return getIdToken()
.flatMap(idToken -> userApi.register(idToken));
}
但遇到错误，
.flatMap(idToken -> userApi.register(idToken));
此代码提示在主线程中运行
firebaseAuth.getAccessToken(false)
内部代码在工作线程中自动切换并执行对Google Firebase的网络请求，当onSuccess成功时，其内部代码切换到nowThread（MainTread），然后执行
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
不起作用，但是如何处理该线程切换以在工作线程中创建flatMap？我调用寄存器func如下：
Disposable disposable = UserModel.getInstance().register()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(baseResponse -> {
Toast.makeText(this, "a", Toast.LENGTH_SHORT).show();
}, throwable -> {
throwable.printStackTrace();
Log.d("MainActivity111", throwable.getMessage());
});
logcat提示错误：
08-28 11:18:26.634 6870-6870/? W/System.err: android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1450)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:355)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:357)
at java.net.Socket.connect(Socket.java:616)
at okhttp3.internal.platform.AndroidPlatform.connectSocket(AndroidPlatform.java:71)
at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:240)
at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:160)
at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:257)
at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:135)
at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:114)
at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
08-28 11:18:26.635 6870-6870/? W/System.err: at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
08-28 11:18:26.636 6870-6870/? W/System.err: at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:126)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:200)
at okhttp3.RealCall.execute(RealCall.java:77)
08-28 11:18:26.637 6870-6870/? W/System.err: at retrofit2.OkHttpCall.execute(OkHttpCall.java:180)
at retrofit2.adapter.rxjava2.CallExecuteObservable.subscribeActual(CallExecuteObservable.java:42)
at io.reactivex.Observable.subscribe(Observable.java:12036)
08-28 11:18:26.638 6870-6870/? W/System.err: at retrofit2.adapter.rxjava2.BodyObservable.subscribeActual(BodyObservable.java:34)
at io.reactivex.Observable.subscribe(Observable.java:12036)
at io.reactivex.internal.operators.observable.ObservableFlatMap$MergeObserver.subscribeInner(ObservableFlatMap.java:165)
at io.reactivex.internal.operators.observable.ObservableFlatMap$MergeObserver.onNext(ObservableFlatMap.java:139)
at io.reactivex.internal.operators.observable.ObservableCreate$CreateEmitter.onNext(ObservableCreate.java:67)
08-28 11:18:26.639 6870-6870/? W/System.err: at cn.candrwow.coincoin.model.UserModel.lambda$null$0(UserModel.java:37)
at cn.candrwow.coincoin.model.-$$Lambda$UserModel$TP1OIyNide1WpDi-afDDpxaJhcE.onSuccess(Unknown Source:4)
at com.google.android.gms.tasks.zzn.run(Unknown Source:27)
at android.os.Handler.handleCallback(Handler.java:790)
08-28 11:18:26.640 6870-6870/? W/System.err: at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
更新
我发现firebase监听器内部代码强制将线程切换到mainThread，而不是调用它的线程，所以出现了以上问题
emitter.onNext(getTokenResult.getToken());
强制进入mainThread，而不是
.subscribeOn(Schedulers.io())
firebase内部代码未打开，我在下面的代码（位于Activity.onCreate中）下登录，发现它强制切换：
new Thread(() -> {
Log.d("TestActivity", Thread.currentThread().getName());
FirebaseAuth.getInstance().getAccessToken(false)
.addOnSuccessListener(getTokenResult -> {
Log.d("TestActivity", Thread.currentThread().getName());
});
}).start();
logcat是这样的：
08-28 16:47:47.232 12289-12384/? D/TestActivity: Thread-5
main
我添加.observeOn（Schedulers.io（））成功，而Answers的建议也成功。
public Observable<BaseResponse> register() {
return getIdToken()
// .observeOn(Schedulers.io())
.flatMap(idToken -> userApi.register(idToken).subscribeOn(Schedulers.io()));
}
这是我的UserApi界面：
public interface UserApi {
@FormUrlEncoded
@POST("account/register")
Observable<BaseResponse> register(@Field("idToken") String idToken);
@GET("account/testGoogle")
Observable<BaseResponse> test(@Query("idToken") String idToken);
}
答案 0 :(得分：1)
.flatMap(idToken -> userApi.register(idToken))
可能是
.flatMap(idToken -> userApi.register(idToken).subscribeOn(Schedulers.io()))
然后它将起作用。