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?

Answer 1

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.

Answer 2

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

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

Answer 3

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.