How to make RxJava in Android backward compatible?

RxJava is a powerful tool for managing asynchronous operations in Android. However, older devices may not support the latest versions. This guide will show you how to make RxJava in Android backward compatible, ensuring that your app runs smoothly on a variety of devices.

 
// Example of making RxJava backward compatible in Android
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.schedulers.Schedulers;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Observable.just("Hello, RxJava!")
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(System.out::println, Throwable::printStackTrace);
    }
}