Could not find class 'io.reactivex.rxjava3.internal.jdk8.ObservableFirstStageObserver', referenced from method io.reactivex.rxjava3.core.Observable.firstOrErrorStage

[398049343]

Device

• HONOR 6 Plus
• Android 4.4.2

Issue description

• During the process of using the new version to obtain the Manifest.permission.READ_CONTACTS permission, the log is as follows, and the APP does not crash at this time.

implementation 'com.github.tbruyelle:rxpermissions:0.12'
implementation 'io.reactivex.rxjava3:rxjava:3.0.6'

09-01 10:27:23.624 9968-9968/com.XXXXXXX.XXXXXX E/dalvikvm: Could not find class 'io.reactivex.rxjava3.internal.jdk8.ObservableFirstStageObserver', referenced from method io.reactivex.rxjava3.core.Observable.firstOrErrorStage
09-01 10:27:23.624 9968-9968/com.XXXXXXX.XXXXXX E/dalvikvm: Could not find class 'io.reactivex.rxjava3.internal.jdk8.ObservableFirstStageObserver', referenced from method io.reactivex.rxjava3.core.Observable.firstStage
09-01 10:27:23.629 9968-9968/com.XXXXXXX.XXXXXX E/dalvikvm: Could not find class 'io.reactivex.rxjava3.internal.jdk8.ObservableLastStageObserver', referenced from method io.reactivex.rxjava3.core.Observable.lastOrErrorStage
09-01 10:27:23.629 9968-9968/com.XXXXXXX.XXXXXX E/dalvikvm: Could not find class 'io.reactivex.rxjava3.internal.jdk8.ObservableLastStageObserver', referenced from method io.reactivex.rxjava3.core.Observable.lastStage
09-01 10:27:23.639 9968-9968/com.XXXXXXX.XXXXXX E/dalvikvm: Could not find class 'io.reactivex.rxjava3.internal.jdk8.ObservableSingleStageObserver', referenced from method io.reactivex.rxjava3.core.Observable.singleOrErrorStage
09-01 10:27:23.644 9968-9968/com.XXXXXXX.XXXXXX E/dalvikvm: Could not find class 'io.reactivex.rxjava3.internal.jdk8.ObservableSingleStageObserver', referenced from method io.reactivex.rxjava3.core.Observable.singleStage
09-01 10:27:23.769 9968-9968/com.XXXXXXX.XXXXXX E/dalvikvm: Could not find class 'io.reactivex.rxjava3.internal.jdk8.FlowableFirstStageSubscriber', referenced from method io.reactivex.rxjava3.core.Flowable.firstOrErrorStage
09-01 10:27:23.769 9968-9968/com.XXXXXXX.XXXXXX E/dalvikvm: Could not find class 'io.reactivex.rxjava3.internal.jdk8.FlowableFirstStageSubscriber', referenced from method io.reactivex.rxjava3.core.Flowable.firstStage
09-01 10:27:23.774 9968-9968/com.XXXXXXX.XXXXXX E/dalvikvm: Could not find class 'io.reactivex.rxjava3.internal.jdk8.FlowableLastStageSubscriber', referenced from method io.reactivex

• After I switched back to the old version, the above log did not appear again. The old version is as follows:

implementation "io.reactivex.rxjava2:rxjava:2.2.19"
implementation 'com.github.tbruyelle:rxpermissions:0.10.2'

• How can I clear the above log?

[IvesWang]

use 3.0.4 is ok, may have been removed some classes in 3.0.6

[galuszkak]

Hi @IvesWang @398049343 ,

This is available in RxJava 3.0.6 so this is probably something else. (see here: https://github.com/ReactiveX/RxJava/blob/v3.0.6/src/main/java/io/reactivex/rxjava3/internal/jdk8/ObservableFirstStageObserver.java)
@398049343 can you prepare minimum working example and post somewhere the code so we can look at it?

[398049343]

@galuszkak
The code is very simple, but the above log will appear on this model.But it won't lead to any collapse.

class MainActivity : AppCompatActivity() {
    lateinit var mBinding: ActivityMainBinding
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        mBinding = DataBindingUtil.setContentView(this, R.layout.activity_main)
        setContentView(mBinding.root)
        btn.setOnClickListener {
            RxPermissions(this).request(Manifest.permission.CAMERA)
                .subscribe {

                }
        }
    }
}

// RxJava
implementation 'io.reactivex.rxjava3:rxjava:3.0.6'
// RxPermissions
implementation 'com.github.tbruyelle:rxpermissions:0.12'

Huawei mobile phones always have strange problems

[398049343]

@IvesWang
The log will also appear in version 3.0.4. Huawei's mobile phone system is very strange