例外:尽管我在另一个线程上进行了subsribed,但不能在UI线程上调用blockingConnect
我有这样的调用:
val connectionResult = googleApiClient.blockingConnect()
这是这个例外的原因:
java.lang.IllegalStateException:不能在UI线程上调用blockingConnect
at com.google.android.gms.common.internal.zzbp.zza(Unknown Source) at com.google.android.gms.common.api.internal.zzbd.blockingConnect(Unknown Source) at com.elstatgroup.elstat.NexoLocationManager.startLocationUpdatesGmsApi(NexoLocationManager.kt:510) at com.elstatgroup.elstat.NexoLocationManager.startLocationUpdates(NexoLocationManager.kt:498) at com.elstatgroup.elstat.NexoLocationManager.appendRSSIEvent(NexoLocationManager.kt:283) at com.elstatgroup.elstat.NexoLocationManager.appendRSSIEvent(NexoLocationManager.kt:273) at com.elstatgroup.elstat.NexoLocationTest.testAppendLocationEvents(NexoLocationTest.kt:111) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.robolectric.RobolectricTestRunner$HelperTestRunner$1.evaluate(RobolectricTestRunner.java:497) at org.robolectric.internal.SandboxTestRunner$2.evaluate(SandboxTestRunner.java:228) at org.robolectric.internal.SandboxTestRunner.runChild(SandboxTestRunner.java:110) at org.robolectric.internal.SandboxTestRunner.runChild(SandboxTestRunner.java:37) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.robolectric.internal.SandboxTestRunner$1.evaluate(SandboxTestRunner.java:64) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
我想,这将有助于:
Observable.just(googleApiClient.blockingConnect()) .subscribeOn(Schedulers.newThread()) .subscribe(Consumer { connectionResult -> if (connectionResult.isSuccess()) { //do something } })
但是我错了,这没有帮助。 唯一的办法,我让它不崩溃是这样的:
Thread(Runnable { val connectionResult = googleApiClient.blockingConnect() if (connectionResult.isSuccess()) { //do something } }).start()
那么为什么我的RxJava解决方案无法正常工作?
Observable.just()
接受传递给下一个链式可观察值的值。 如果你仔细检查,那么在这里你的情况
Observable.just(googleApiClient.blockingConnect())
googleApiClient.blockingConnect()
首先被执行,因为操作符需要一个值/值。 所以你需要一个接受函数调用或者类似的操作符。
对于你的情况,可以使用Observable.fromCallable()
来接收一个可调用的参数:
Observable.fromCallable(() -> googleApiClient.blockingConnect());
这里googleApiClient.blockingConnect()
将在您订阅可观察链时执行。
这是因为Observable#只是渴望并将阻止,直到#blockingConnect完成。
这个例子应该诀窍:
Observable.fromCallable(() -> { return googleApiClient.blockingConnect(); }).subscribeOn(Schedulers.io());