CODEWITHSUNDEEP
android
Football-Is-My-Life
Football-Is-My-Life

Reputation: 1437

When checking internet access in android, why does it always return "true"?

How to check for Internet access in Android?

Why does it always return true?

I am sure I am not connected to Internet. Why does it return true?

public static boolean isOnline(Context context) {
    ConnectivityManager cm = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
    // test for connection
    if (cm.getActiveNetworkInfo() != null &&
        cm.getActiveNetworkInfo().isAvailable() &&
        cm.getActiveNetworkInfo().isConnected()) {

        return true;
    } else {
        Log.v("TAG", "Internet Connection Not Present");
        return false;
    }
}

Upvotes: 1

Views: 1677

Answers (3)

yuttadhammo
yuttadhammo

Reputation: 5199

You could try testing to figure out which connection is seen as active:

public boolean isOnline() {
  ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo netInfoMob = cm.getNetworkInfo(cm.TYPE_MOBILE);
  NetworkInfo netInfoWifi = cm.getNetworkInfo(cm.TYPE_WIFI);
  if (netInfoMobile != null && netInfoMobile.isConnectedOrConnecting()) {
    Log.v("TAG", "Mobile Internet connected");
    return true;
  } 
  if (netInfoWifi != null && netInfoWifi.isConnectedOrConnecting()) {
    Log.v("TAG", "Wifi Internet connected");
    return true;
  } 
  return false;
}

Edit: On the emulator, it will always show mobile connected regardless of your computer's Internet connection. Use F8 to switch it off, as per this answer:

https://stackoverflow.com/a/2937915/560092

Upvotes: 3

Hiemanshu Sharma
Hiemanshu Sharma

Reputation: 7882

The method you are using doesn't always work correctly. Some times it will return true even if you are connected to a wifi network (but that network isn't actually connected to internet), etc. The other alternative is

public boolean isOnline() {
  ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo netInfoMob = cm.getNetworkInfo(cm.TYPE_MOBILE);
  NetworkInfo netInfoWifi = cm.getNetworkInfo(cm.TYPE_WIFI);
  if ((netInfoMobile != null && netInfoMobile.isConnectedOrConnecting()) || (netInfoWifi != null && netInfoWifi.isConnectedOrConnecting())) {
    return true;
}
  return false;
}

Upvotes: 0

Somil
Somil

Reputation: 481

public boolean isNetworkAvailable() {
        ConnectivityManager connectivityManager 
              = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
        boolean isAvailable = activeNetworkInfo != null && activeNetworkInfo.isConnected();
        if(!isAvailable) {
            Toast.makeText(this,"Unable to connect", Toast.LENGTH_SHORT).show();
        }
        return activeNetworkInfo != null && activeNetworkInfo.isConnected();
    }

Upvotes: 0

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