Develop Reference

How can I know the application state of an Android App to display or not a notification?

I am developping an instant messaging application that uses Google Cloud Messaging. I send a notification when a user receive a message from a contact. Everything works properly. I set up the GCMBroadcastReceiver and the GCMMessageHandler. The problem is : the notification is always displaying even if the user is currently chatting with his contact. How can I know the application state in the GCMMessageHandler to not display the notification ?
Here is the GCMBroadcastReceiver :
public class GcmBroadcastReceiver extends WakefulBroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
// Explicitly specify that GcmMessageHandler will handle the intent.
ComponentName comp = new ComponentName(context.getPackageName(),
GcmMessageHandler.class.getName());
// Start the service, keeping the device awake while it is launching.
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}
Here is the GCMMessageHandler :
protected void onHandleIntent(Intent intent) {
Bundle extras = intent.getExtras();
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
String messageType = gcm.getMessageType(intent);
mes = extras.getString("message");
if(IM_NOT_IN_THE_CHAT_ACTIVITY)
{
showNotification(mes);
}
What I'm struggling to get is that flag : IM_NOT_IN_THE_CHAT_ACTIVITY.
How can I know this in the IntentService ?

Doing this would do the trick I guess :
ActivityManager am = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE);
List< ActivityManager.RunningTaskInfo > taskInfo = am.getRunningTasks(1);
String activity_name = taskInfo.get(0).topActivity.getClassName();
if(activity_name != ACTIVITY_NAME)
showNotification(mes);

Intent error while using startWakefulService

I'm trying to use startWakefulService(context, intent)
But after encoutering some issues I debugged my app and found that the intent being passed on to the method is false, it uses
Intent { act=com.google.android.c2dm.intent.RECEIVE flg=0x10 pkg=com.myApp.beta cmp=com.myApp.beta/fonctionnalite.Actualites.GcmReceiver (has extras) }
Instead of
Intent { act=com.google.android.c2dm.intent.RECEIVE flg=0x10 pkg=fonctionnalite.Actualites cmp=fonctionnalite.Actualites.GcmReceiver (has extras) }
So basically I'm trying to call the class called GcmReceiver which is in the package fonctionnalite.Actualites. I tried using a different component and intent but it still didn't work, would anyone know how I can solve this problem ?
Thanks !
Here is the code for the class using startWakefulService
public class GcmReceiver extends WakefulBroadcastReceiver{
#Override
public void onReceive(Context context, Intent intent) {
ComponentName comp = new ComponentName(context.getPackageName(), GcmMessageHandler.class.getName());
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}

GCM Android Push Notification: send OK but not delivered

I'm trying to send push notification to android devices. I have not problem to register the ID of the emulator or the devices, but it's impossibile to receive messages also if the send status is 200 OK.
I also try to look to firewall settings, but it's already turned off.
I tried also to use PushBots service from web: same thing. Device registered correctly, message sent, but not delivered to emulator or devices.

It was my mistake. I didn't notice the app was giving me exception when sending push from web for an error in the manifest Receiver.
Implemented the NotificationManager now I receive the push messagge into device.
public class GcmBroadcastReceiver extends WakefulBroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
// Explicitly specify that GcmMessageHandler will handle the intent.
ComponentName comp = new ComponentName(context.getPackageName(),
GcmMessageHandler.class.getName());
// Start the service, keeping the device awake while it is launching.
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}
#Override
protected void onHandleIntent(Intent intent) {
Bundle extras = intent.getExtras();
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
String messageType = gcm.getMessageType(intent);
mes = extras.getString("title");
sendNotification(mes);
sendAlert(mes);
Log.i("GCM", "Received : (" +messageType+") "+extras.getString("title"));
GcmBroadcastReceiver.completeWakefulIntent(intent);
}

Sending a push notification to an inactive user on android

Is it possible to send a push notification to a user after they have left an android app for a defined period of time?

Yes of course!
You should suscribe your android to your GcmBroadcastReceiver class.
and add the permission
Your class will tell when a push message arrives, and be handled by your class in your app.
Here is an example:
public class GcmBroadcastReceiver extends WakefulBroadcastReceiver{
#Override
public void onReceive(Context context, Intent intent) {
// Explicitly specify that GcmIntentService will handle the intent.
ComponentName comp = new ComponentName(context.getPackageName(),
GcmIntentService.class.getName());
// Start the service, keeping the device awake while it is launching.
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}

Stop IntentService from inside my application?

I'm building some kind of chat program that uses GCM to notify the user that a message is available. I followed the gcm client example using a WakefulBroadcastReceiver and IntentService and everything works as expected.
The BroadcastReceiver:
public class GcmBroadcastReceiver extends WakefulBroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
// Explicitly specify that GcmIntentService will handle the intent.
ComponentName comp = new ComponentName(context.getPackageName(), GcmIntentService.class.getName());
// Start the service, keeping the device awake while it is launching.
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}
and the IntentService:
public class GcmIntentService extends IntentService {
public static final int NOTIFICATION_ID = 1;
private NotificationManager mNotificationManager;
public GcmIntentService() {
super("GcmIntentService");
}
public static final String TAG = "IOAN";
#Override
protected void onHandleIntent(Intent intent) {
Bundle extras = intent.getExtras();
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
// The getMessageType() intent parameter must be the intent you received
// in your BroadcastReceiver.
String messageType = gcm.getMessageType(intent);
if (!extras.isEmpty()) { // has effect of unparcelling Bundle
if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE.equals(messageType)) {
// Post notification of received message.
sendNotification(extras.getString("sender"), extras.getString("message"));
Log.i(TAG, "Received: " + extras.toString());
}
}
// Release the wake lock provided by the WakefulBroadcastReceiver.
GcmBroadcastReceiver.completeWakefulIntent(intent);
}
//... more stuff
}
So the IntentService sends a notification to my application.
Now, when the user closes my application (back button -> are you sure you want to exit? -> yes), I want to also have a check box "do you still want to receive messages?" (or something like that), and if the user chooses not to receive messages, I want to stop the service that handles the gcm message and restart it when the app runs again.
How do I do that?
Edit: I tried stopService(new Intent(MainActivity.this,GcmIntentService.class)); but I still get the notifications.
Edit 2: Seems like a boolean value in SharedPreferences works fine... any better solution?