RxJava/RxAndroid Check internet connection available or not

Question

I have this code to check if internet connection is available or not.

    public static boolean  isOnline() {
    Runtime runtime = Runtime.getRuntime();
    try {
        Process ipProcess = runtime.exec("/system/bin/ping -c 1 8.8.8.8");
        int exitValue = ipProcess.waitFor();
        return (exitValue == 0);
    } catch (IOException | InterruptedException e) {
        e.printStackTrace();
    }
    return false;
}

Now i want to do the same task using RxJava/RxAndroid. so how can I do that?

Possible duplicate of [Internet check, where to place when using MVP, RX and Retrofit](http://stackoverflow.com/questions/38242462/internet-check-where-to-place-when-using-mvp-rx-and-retrofit) — Edson Menegatti, Jan 22 '17 at 12:01

score 7 · Accepted Answer · edited May 23 '17 at 12:26

If you're allowed to use the ConnectivityManager this is a quick way to check for internet connection:

public static Observable<Boolean> isInternetOn(Context context) {
    ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
    return Observable.just(activeNetworkInfo != null && activeNetworkInfo.isConnected());
    }

and then use it as follows:

private Observable<Object> executeNetworkCall() {
    return isInternetOn(context)
            .filter(connectionStatus -> connectionStatus)
            .switchMap(connectionStatus -> doNetworkCall()));
}

If you need more info, this answer provides much more detailed instructions.

If someone wants a continuous pinging you would do something like: (i.e every 2 seconds)just use `Observable .interval(0, 2, TimeUnit.SECONDS).scheduleOn(Schedulers.io()).flatMap { isInternetOn(this) } ` — Lamour, Dec 10 '18 at 20:53

score 3 · Answer 2 · answered Jan 22 '17 at 12:46

3

You can use ReactiveNetwork. This library do all work for checking connectivity state under hood and you can just observe connectivity state by subscribing to it.

answered Jan 22 '17 at 12:46

EgorD

886
6
12

score 1 · Answer 3 · answered Jan 23 '17 at 22:33

1

You can check for Internet and listen for it's state using Rx-receivers

see : https://github.com/f2prateek/rx-receivers

answered Jan 23 '17 at 22:33

Mohamed Yehia

400
1
5
15

score 0 · Answer 4 · edited Jan 22 '17 at 14:54

public class MainActivity extends AppCompatActivity{
  private Subscription sendStateSubscription;

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

      final Observable<RxNetwork.State> sendStateStream =
              RxNetwork.stream(this);

      sendStateSubscription = AppObservable.bindActivity(
            this, sendStateStream
      ).subscribe(new Action1<RxNetwork.State>() {
          @Override public void call(RxNetwork.State state) {
              if(state == RxNetwork.State.NOT_CONNECTED)
                  Timber.i("Connection lost");
              else
                  Timber.i("Connected");
          }
      });
  }

  @Override protected void onDestroy() {
      sendStateSubscription.unsubscribe();
      sendStateSubscription = null;

      super.onDestroy();
  }
}

score -3 · Answer 5 · answered Jan 22 '17 at 11:53

-3

//ping any website with the following code to check for internet connection

public boolean isConnected() throws InterruptedException, IOException
{
    String command = "ping -c 1 google.com";
    return (Runtime.getRuntime().exec (command).waitFor() == 0);
}

answered Jan 22 '17 at 11:53

akuthedeveloper

48
1
5

2

This answer doesn't consider the requirement of doing it with RxJava. – Edson Menegatti Jan 22 '17 at 11:55

RxJava/RxAndroid Check internet connection available or not

5 Answers5

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