App crashes when there is no internet

Question

My app is an rss feed and retrieves data when started and when refreshed but when there is no Internet connection the app crashes. How do I check for Internet connection and display a toast if there isn't any

Check this link http://www.tutorialspoint.com/android/android_network_connection.htm — Vinothkumar Nataraj, Jul 26 '16 at 12:56
refer [How to check internet access on Android? InetAddress never timeouts...](http://stackoverflow.com/questions/1560788/how-to-check-internet-access-on-android-inetaddress-never-timeouts) — Ravi, Jul 26 '16 at 12:56
lot of examples are their in google http://stackoverflow.com/questions/1560788/how-to-check-internet-access-on-android-inetaddress-never-timeouts — Android Surya, Jul 26 '16 at 12:56

score 2 · Answer 1 · edited May 23 '17 at 12:14

You can use this function to check if there is internet

public boolean isConnected() {
    ConnectivityManager cm =
        (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo netInfo = cm.getActiveNetworkInfo();
    return netInfo != null && netInfo.isConnectedOrConnecting();
}

You also need to add this to the manifest file

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

And then just check it

if(isConnected){
    //Connected to the internet
}
else{
    //Handle error and show toast
}

You can find a more detailed answer here How to check internet access on Android? InetAddress never times out

score 1 · Answer 2 · answered Jul 26 '16 at 12:56

To check is decive connected to network.

private boolean isNetworkConnected() {
  ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

  return cm.getActiveNetworkInfo() != null;
 }

To check if internet is avalaibe

public boolean isInternetAvailable() {
        try {
            InetAddress ipAddr = InetAddress.getByName("google.com"); //You can replace it with your name
            return !ipAddr.equals("");

        } catch (Exception e) {
            return false;
        }

    }

You are missing the permission – guipivoto Jul 26 '16 at 12:57 — guipivoto, Jul 26 '16 at 12:57

score 0 · Answer 3 · answered Jul 26 '16 at 12:58

Use this function

private boolean isNetworkConnected() {
    ConnectivityManager connectivityManager
            = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
    return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}

Check Internet connected or not

if(isNetworkConnected){

}

And add below permission in your manifestfile

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

App crashes when there is no internet

3 Answers3