How to send broadcast message on onCreate method in Android

Question

I want to send broadcast message to an application and then receive it from current activity. I can send broadcast message but then it couldn't received from broadcast receiver. Here is my code;

public class LogIn extends Activity {

    private BroadcastReceiver receiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                //toast message received !
            }
        };

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

        ActionBar actionBar = getActionBar();
        //send broadcast message
        Intent i = new Intent(LogIn.class.getName());
        getContext().sendBroadcast(i);
    }

    @Override
    protected void onResume() {
        super.onResume();
        registerReceiver(receiver, new IntentFilter(LogIn.class.getName()));
    }

    @Override
    protected void onPause() {
        super.onPause();
        try {
            unregisterReceiver(receiver);
        } catch (Exception e) {}
    }
}

What is the problem that I missed ? Thank you for your help..

score 3 · Accepted Answer · answered Dec 09 '15 at 19:51

3

Have a look at the diagram for an Activity's lifecycle. The onCreate() method runs before onResume(), so your sending the broadcast before you've registered the Receiver.

I'm not sure why you'd want to broadcast to the same class, but you can solve your issue by calling the registerReceiver() method in onCreate() as well, before the sendBroadcast() call.

answered Dec 09 '15 at 19:51

Mike M.

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Hi Mike, thank you for clear answer and do you mean I should create registerreceiver() method in oncreate – Ozan Dec 09 '15 at 19:56
I mean just copy the `registerReceiver()` line you have in `onResume()` to before the `sendBroadcast()` line in `onCreate()`. Get rid of the sticky broadcast, too. – Mike M. Dec 09 '15 at 19:57
Yeppp ! I just needed to call registerReceiver() before sending message.. This shows I am not good at Activity's lifecycle, thank you Mike ! – Ozan Dec 09 '15 at 20:04

Deepak Goyal · Answer 2 · 2015-12-09T19:34:50.833

you are registering your receiver with different intent and sending the broadcast with different intent. Thats why you are not receiving your broadcast.

public class LogIn extends Activity{

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ActionBar actionBar = getActionBar();
    //send broadcast message
    Intent i = new Intent("com.abc");
    getContext().sendStickyBroadcast(i);
}
private BroadcastReceiver receiver=new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
        //toast message received !
        }
    };
@Override
protected void onResume() {
    super.onResume();
    registerReceiver(receiver, new IntentFilter("com.abc"));
}
@Override
protected void onPause() {
    super.onPause();
    try {
        unregisterReceiver(receiver);
    } catch (Exception e) {
    }
}

Add Permission

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

also you can try with `stickyBroadcastReceiver` – Deepak Goyal Dec 09 '15 at 19:33 — Deepak Goyal, Dec 09 '15 at 19:33

How to send broadcast message on onCreate method in Android

2 Answers2