isInternetAvailable.java

 public static boolean isInternetAvailable() {

        Runtime runtime = Runtime.getRuntime();
        try {
            Process ipProcess = runtime.exec("/system/bin/ping -c 1 8.8.8.8");
            int exitValue = ipProcess.waitFor();
            Debug.i(exitValue + "");
            return (exitValue == 0);

        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }

        return false;
    }