CODEWITHSUNDEEP
javaandroidandroid-connectivitymanager
Bir Nepali
Bir Nepali

Reputation: 439

How to detect Network change and change activity from A to B when Network is connected

I have SplashActivity, Activity A and Activity B.

When the Internet is not available, Splash activity redirects to Activity A and when Internet is available and is connected SplashActivity redirects to Activity B.

I would like to immediately close the Activity A when user is connected itself and Open Activity B when user is still inside the app and he open his wifi or mobile Data.

Here is the code I'm using in SplahsActivity to redirect to Activity A and Activity B as per Network status

public static boolean isNetworkStatusAvialable(Context context) {
    ConnectivityManager cm =
            (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

    NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
    return activeNetwork != null &&
            activeNetwork.isConnectedOrConnecting();

}

and I check with 

  if (isNetworkStatusAvialable(getApplicationContext())) {
    // Load Activity B
  } else {
    Load Activity A and Toast Message, " No Internet"
  }

Thanks in advance.

Upvotes: 5

Views: 4258

Answers (1)

Vikasdeep Singh
Vikasdeep Singh

Reputation: 21766

In this case you should check network status using BroadcastReceiver because you immediately want to close current activity and move to other activity. So below is complete code for it:

ConnectivityStatusReceiver.java

public class ConnectivityStatusReceiver extends BroadcastReceiver {

  @Override
  public void onReceive(Context context, Intent intent) {

    final ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

    NetworkInfo activeNetworkInfo = connMgr.getActiveNetworkInfo();

    if (activeNetworkInfo != null) {
      Toast.makeText(context, activeNetworkInfo.getTypeName() + " connected", Toast.LENGTH_SHORT).show();

      // Your code to start Activity B
      Activity activity = (Activity) context;
      intent = new Intent(activity, ActivityB.class);
      activity.startActivity(intent);

    } else {
      Toast.makeText(context, "No Internet or Network connection available", Toast.LENGTH_LONG).show();
    }
  }

}

MainActivity.java 

public class MainActivity extends AppCompatActivity {
  ConnectivityStatusReceiver connectivityStatusReceiver;

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

    connectivityStatusReceiver = new ConnectivityStatusReceiver();
  }

  @Override
  protected void onResume() {
    super.onResume();
    IntentFilter intentFilter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
    registerReceiver(connectivityStatusReceiver, intentFilter);
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    if (connectivityStatusReceiver != null) {
      // unregister receiver
      unregisterReceiver(connectivityStatusReceiver);
    }
  }
}

To close Activity A you just add android:noHistory="true" in Manifest like below:

<activity android:label="@string/app_name" android:name="ActivityA"/>

Hope this will help you.

Upvotes: 5

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