[SOLVED] Only the original thread that created a view hierarchy can touch its views. RxAndroid

Only the original thread that created a view hierarchy can touch its views. RxAndroid

I tried using RxAndroid

button.setOnClickListener(view -> restApiFactory.testService().getListTest(7)
                .subscribeOn(Schedulers.io())
                .subscribe(new Observer<List<Test>>() {

but I got the following error :

android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

I have not Used AndroidSchedulers.mainThread()

Solution

You need to manipulate UI from main thread so in order to do that you need to tell rxandroid to notify changes on main thread so use

button.setOnClickListener(view -> restApiFactory.testService().getListTest(7)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                //              ^^^^^^^^^^
                .subscribe(new Observer<List<Test>>() {

and to obtain this, you need to have a dependency as

compile 'io.reactivex.rxjava2:rxandroid:2.0.1'

and your current dependencies are used to make retrofit retuns rxAndroid type response.