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Maybe it's easy, but I couldn't really figure this out right so far... I got a BroadcastReceiver waiting to get triggered by the AlarmMangager - this works fine.
Now: because the event, if it occurs, needs to refresh some elements on screen of the main Activity, I would like to send an Intent from that background BroadcastReceiver to my Activity - but only if it is currently in the foreground, aka active.
If it is not running or not visible, I don't care - and the last thing I want to do is start the Activity by my intent! I handle repainting of the views in my onResume() method, so I don't care at all.
Any hints on how to do that? Thanks!
EDIT: my BroadcastReceiver is waiting for alarms that must be notified to the user. So, it must be there and declared in the manifest. The problem is: it will have to decide whether the mentioned Activity is currently up in front or not.
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Intent intent = getIntent(); String message = intent. getStringExtra("message"); And then you will use message as you need. If you simply want the ReceiveText activity to show the message as a dialog, declare <activity android:theme="@android:style/Theme.
If you want a background receiver, you need to register it inside the AndroidManifest (with intent filter), add an IntentService and start it when you receive a broadcast in the receiver.
Retrieve the current result extra data, as set by the previous receiver. This can be called by an application in onReceive(Context, Intent) to allow it to keep the broadcast active after returning from that function.
A broadcast receiver is implemented as a subclass of BroadcastReceiver class and overriding the onReceive() method where each message is received as a Intent object parameter.
I believe that you're familiar with AlarmManager now (creating a new Alarm, register a receiver...) so I will not talk about that. Just give you a solution for your question.
Instead of registering a BroadcastReceiver in a class file and in manifest, you only create a new BroadcastReceiver in your activity, and then, register it in onResume method, and unregister it in onPause method, sth like this in your activity:
private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { //do something } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mIntentFilter = new IntentFilter(); mIntentFilter.addAction("your alarm action"); ... } @Override protected void onResume() { registerReceiver(mIntentReceiver, mIntentFilter); ... super.onResume(); } @Override protected void onPause() { unregisterReceiver(mIntentReceiver); ... super.onPause(); } The receiver will only receive the alarm intent when your activity is in foreground :)
(Sorry if my English is not clear)
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