当使用rx android和retrofit时，我在线程异常时遇到了网络。这是我的代码：
public Observable<PostVariablesModel> requestApiItem() {
return getauthenticationtoken.getToken().flatMap(new Func1<String, Observable<PostVariablesModel>>() {
public Observable<PostVariablesModel> call(String token) {
return service.postdata(value1, value2, value3, token);
}
}).subscribeOn(Schedulers.io());
}
public void postdata() {
requestApiItem() //I think problem is here any idea?
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Subscriber<PostVariablesModel>() {
@Override
public void onCompleted() {
System.out.print("Complete");
}
@Override
public void onError(Throwable e) {
System.out.print("Fail");
}
@Override
public void onNext(PostVariablesModel apiResult) {
System.out.print(apiResult.toString());
}
});
}
完成http调用后，我们是否必须取消订阅？有什么想法吗？
以下是例外情况。我在代码中的postdata方法的onError上得到了这个异常：
android.os.NetworkOnMainThreadException at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1273)
at java.net.InetAddress.lookupHostByName(InetAddress.java:431)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
at java.net.InetAddress.getAllByName(InetAddress.java:215)
at okhttp3.Dns$1.lookup(Dns.java:39)
at okhttp3.internal.connection.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:170)
at okhttp3.internal.connection.RouteSelector.nextProxy(RouteSelector.java:136)
at okhttp3.internal.connection.RouteSelector.next(RouteSelector.java:81)
at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:171)
at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:121)
at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:100)
at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:179)
at okhttp3.RealCall.execute(RealCall.java:63)
at retrofit2.OkHttpCall.execute(OkHttpCall.java:174)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:171)
at rx.Subscriber.setProducer(Subscriber.java:211)
at rx.Subscriber.setProducer(Subscriber.java:205)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:152)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:138)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:8666)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:250)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:147)
at rx.internal.operators.OperatorMap$MapSubscriber.onNext(OperatorMap.java:74)
at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.call(OperatorObserveOn.java:227)
at rx.android.schedulers.LooperScheduler$ScheduledAction.run(LooperScheduler.java:107)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7231)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
答案 0 :(得分：4)
return getauthenticationtoken.getToken().subscribeOn(Schedulers.io());
但您也可以使用默认调度程序创建调用适配器，它可以是Schedulers.io（）。
return new Retrofit.Builder()
.addConverterFactory(SimpleXmlConverterFactory.create())
.baseUrl("http://thecatapi.com/")
.addCallAdapterFactory(
RxJava2CallAdapterFactory.createWithScheduler(Schedulers.io())) // <---- !!!
.build()
答案 1 :(得分：0)
试试这个
public Observable<PostVariablesModel> requestApiItem() {
return getauthenticationtoken.getToken().flatMap(new Func1<String, Observable<PostVariablesModel>>() {
public Observable<PostVariablesModel> call(String token) {
return service.postdata(value1, value2, value3, token);
}
});
}
public void postdata() {
requestApiItem() //I think problem is here any idea?
.observeOn(AndroidSchedulers.mainThread())
.subscribeOn(Schedulers.io())
.subscribe(new Subscriber<PostVariablesModel>() {
@Override
public void onCompleted() {
System.out.print("Complete");
}
@Override
public void onError(Throwable e) {
System.out.print("Fail");
}
@Override
public void onNext(PostVariablesModel apiResult) {
System.out.print(apiResult.toString());
}
});
}
修改
您可以像这样尝试requestApiItem()函数：
public Observable<PostVariablesModel> requestApiItem() {
return service.postdata(value1, value2, value3, token)
.flatMap(new Func1<PostVariablesModel>() {
@Override
public Observable<? extends PostVariablesModel> call(PostVariablesModel yourModel) {
return Observable.just(yourModel);
}
});
}
注意：您可以尝试上面的代码（将返回的数据更改为您的模型）。