RX java io.reactivex.rxjava3.android.schedulers.AndroidSchedulers无法执行

Question

实现'io.reactivex.rxjava3:rxandroid:3.0.0‘实现'io.reactivex.rxjava3:rxjava:3.0.0’

val标签:String= RXKotlinDemoClass::class.java.simpleName

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    var observable = Observable.just("Goat","Dog","Cow")
        .subscribeOn(Schedulers.io())
        .observeOn(AndroidSchedulers.mainThread()).subscribe({
        value -> println(TAG+"$value")
    },{
        error -> println(TAG+"$error")
    },{
        println(TAG+"onComplete")
    }

    )

}

异常: java.lang.NoSuchMethodError:类Ljava/lang/invoke/LambdaMetafactory中没有静态方法metafactory(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite；；或者它的超类(在/apex/com.android.runtime/javalib/core-oj.jar) at io.reactivex.rxjava3.android.schedulers.AndroidSchedulers.(AndroidSchedulers.java:33) at io.reactivex.rxjava3.android.schedulers.AndroidSchedulers.mainThread(AndroidSchedulers.java:44) at com.android.myfirstapp.RXKotlinDemoClass.onCreate(RXKotlinDemoClass.kt:19) at android.app.Activity.performCreate(Activity )中声明'java.lang.invoke.LambdaMetafactory‘。java:7802) at android.app.Activity.performCreate(Activity.java:7791) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java：135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016) at android.os.Handler.dispatchMessage(Handler.java:107) at android.app.ActivityThread.main(ActivityThread.java:7356) at android.os.Looper.loop(Looper.java:214) at java.lang.reflect.Method.invoke(本地方法)在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)的com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)

Answer 1

我已经把build.gradle降级了

从…

implementation 'io.reactivex.rxjava3:rxandroid:3.0.0' 
implementation 'io.reactivex.rxjava3:rxjava:3.0.0'

至

implementation 'io.reactivex.rxjava2:rxandroid:2.1.0'
implementation 'io.reactivex.rxjava2:rxjava:2.2.10'

它像预期的那样工作。

Answer 2

在使用Rx 3.0时遇到了同样的问题。我需要将这些语句添加到应用程序的build.gradle文件的android部分：

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = "1.8"
    }