Show SnackBar in current Activity

Question

I have many activities, and I have broadCastReceiver that I registered in manifest for check Connectivity. I would like show Snackbar in current activity when I lost internet connection I registered my receiver in manifest:

<receiver android:name="com.itmind.spac.spacapp.services.ConnectivityChangeReceiver">
        <intent-filter>
            <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
        </intent-filter>
    </receiver>

And in BroadCast class:

public class ConnectivityChangeReceiver extends BroadcastReceiver {
   @Override
   public void onReceive(final Context context, final Intent intent) {
      ConnectivityManager cm =(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
      if (cm.getActiveNetworkInfo()!=null){
         Toast.makeText(context, "Connected to Internet", Toast.LENGTH_LONG).show();
       }
       else{
       /** I WOULD CREATE A SNACKBAR FOR ALL ACTIVITIES, OR FOR MY CURRENT ACTIVITY */
        Toast.makeText(context, "No Connected to Internet", Toast.LENGTH_LONG).show();

       }

   }
}

Take a look at: http://stackoverflow.com/questions/2513832/how-to-send-data-from-broadcastreceiver-to-an-activity-in-android — Brian Hoang, Sep 07 '16 at 15:36

x-code · Accepted Answer · 2016-09-07T16:52:45.877

If you are going to respond to a broadcast only when one of your activities is active, you should register and unregister the broadcast receiver in your activities, and the register / unregister calls should appear in matching life cycle events of the activity like onCreate() / onDestroy() or onStart() / onStop().

An easy way to do it for an application with multiple activities is by letting each activity extend a base class that manages the receiver, for example this outline:

public class MyActivity extends AppCompatActivity {
  void onCreate(...) {
    // register the receiver here...
  }

  void onDestroy() {
    // unregister the receiver here...
  }
}

You should also make your connectivity receiver an inner class of this activity, and remove the receiver declaration from the manifest file, because you are registering it dynamically now.

Yeah! thankyou! I registered my broadcast in onCreate and OnDestroy in extends of generalActivity and create an interface in BroadCast, seems work! Thankyou! — LorenzoBerti, Sep 08 '16 at 06:47

Show SnackBar in current Activity

1 Answers1