坑- observeOn(AndroidSchedulers.mainThread())

observeOn(AndroidSchedulers.mainThread())报错

observeon(rx.Schedulers) in Observable cannot be applied to (io.reactivex.Schedulers)

引入无法识别

import rx.android.schedulers.AndroidSchedulers;

//    implementation 'io.reactivex.rxjava2:rxjava:2.2.8'
//    implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'

实际上是RxAndroid最高支持到1.2.1

https://mvnrepository.com/search?q=rxAndroid

解决方案：

implementation 'io.reactivex:rxandroid:1.2.1'