Send a broadcast only to specific Activity

Question

I have one Activity which creates a BroadcastReceiver with an IntentFilter in the method onCreate(...):

IntentFilter iFilter = new IntentFilter("action");

receiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {

    }
};

registerReceiver(receiver, iFilter);

On the other side is an IntentService, which shall send some data:

Intent intent = new Intent(getApplicationContext(), receiver.class);
intent.setAction("action");

[...]

sendBroadcast(intent);

But it seems not to work. No Broadcast ist received.
My service class is in an android lib, perhaps this makes trouble.

Thanks for any advices.

It should work. why do you think it doesn't work. It doesn't matter if it's in a library project, as long as you reference your library project in your main project. — Kumar Bibek, Jul 14 '11 at 18:01
Log or print something in the onRecieve method. What does logcat say? — Kumar Bibek, Jul 14 '11 at 18:08

aromero · Accepted Answer · 2011-07-14T19:23:02.403

10

Just create the intent with your action.

Intent intent = new Intent("action");
[...]
sendBroadcast(intent);

And consider renaming "action" to something more meaningful, like "com.my.package.actions.SOME_ACTION".

If you only want that your application components receive the broadcast then use:

Register a permission in your Manifest with a signature protection level (and define a use-permission for that permission). More here.
Use sendBroadcast(intent, permission), and specify the permission in 1.

edited Jul 14 '11 at 19:23

answered Jul 14 '11 at 18:23

aromero

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There are named more meaningful. ;) When I use that way everyone can receive my *Broadcast* and that I want to prevent. – CSchulz Jul 14 '11 at 18:29
That's the idea of a broadcast event. What do you mean by everyone? Your activities should stop listening somewhere in their lifecycle, probably in the onPause method. – aromero Jul 14 '11 at 18:54
I mean a *Broadcast* can received with different Activities not only my own, can't it? – CSchulz Jul 14 '11 at 19:02
Oh ok. Yes they can listen for your intents, but they would need to know the name of the action. – aromero Jul 14 '11 at 19:18

score 6 · Answer 2 · answered Jan 27 '14 at 00:14

6

if the intent is inside your app only, consider using LocalBroadcastManager

answered Jan 27 '14 at 00:14

android developer

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Send a broadcast only to specific Activity

2 Answers2