Develop Reference

Android - Show Activity by Notification

I have an Activity that push Notification. If the Activity is running background i want that the notification open the activity in foreground (the same activity, not an another instance). Basically the Activity should open itself in foregroung.
this is my code (in the class MyActivity):
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this)
.setAutoCancel(true)
.setPriority(2)
.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
.setSmallIcon(R.drawable.notifica)
.setLargeIcon(bmp)
.setContentTitle(Titolo)
.setContentText(Testo);
Intent resultIntent = new Intent(this, MyActivity.class);
resultIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
| Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent resultPendingIntent =
PendingIntent.getActivity(
getBaseContext(),
0,
resultIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
mBuilder.setLights(Color.BLUE, 500, 500);
long[] pattern = {500,500,500,500,500,500,500,500,500};
mBuilder.setVibrate(pattern);
Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
mBuilder.setSound(alarmSound);
mNotificationManager.notify(mId, mBuilder.build());
I also added this line in the manifest:
android:launchMode="singleTop"
But doesn't work, it create a new instance of MyActivity.
How can i do? tnx

It looks like you set PendingIntent to builder before initializing it.

I compared your code with my working code and the only difference which I see is that your context is not the same as mine.
PendingIntent resultPendingIntent =
PendingIntent.getActivity(
getBaseContext(),
0,
resultIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
Could you try to replace getBaseContext() with the Context from FirebaseMessagingService? The FirebaseMessagingService extends Service, which has a Context.

The other notifications is lost the click behaviour, when a notification is chosen at device's system tray in android

If there're two my app's notifications at device's system tray, the user choose one notification, the app's opening but all of other notifications is lost the click behavior, it means user cannot click them anymore. How can I prevent this action?
My code:
NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.icon)
.setContentTitle(getString(R.string.test))
.setContentText(messageBody);
Intent intent = new Intent(this, NotifActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
Bundle bundle = new Bundle();
bundle.putString(NotificationViewActivity.MESSAGE_EXTRA, messageBody);
intent.putExtras(bundle);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
intent, PendingIntent.FLAG_ONE_SHOT);
builder.setContentIntent(pendingIntent);
NotificationManager notificationManager = (NotificationManager)
getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(new Random().nextInt(50) + 1, builder.build());

int mId = (int) System.currentTimeMillis();
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.imagename)
.setContentTitle("Title")
.setContentText("message")
.setDefaults(Notification.DEFAULT_ALL)
.setAutoCancel(true);
// Creates an explicit intent for an Activity in your app
Intent resultIntent = new Intent(context, activityname.class);
//activityname is the name of activity which you want to launch
resultIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
// The stack builder object will contain an artificial back stack for the
// started Activity.
// This ensures that navigating backward from the Activity leads out of
// your application to the Home screen.
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
// Adds the back stack for the Intent (but not the Intent itself)
stackBuilder.addParentStack(MainActivity.class);
// Adds the Intent that starts the Activity to the top of the stack
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent =
stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
// mId allows you to update the notification later on.
mNotificationManager.notify(mId, mBuilder.build());

I detected my root cause in below code
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
PendingIntent.FLAG_ONE_SHOT);
Because the request code is the same for all notifications, so when we click to the one notification, the other lost their click listener. Fix like below codes
PendingIntent pendingIntent = PendingIntent.getActivity(this, (int) System.currentTimeMillis(), intent,
PendingIntent.FLAG_ONE_SHOT);

How to prevent Notification from clearing all activities in backstack

I am developing an android app with GCM push notification ,in which whenever the notification opens the page it clears all activities from backstack.
Intent intent = new Intent(this, MainActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(MainActivity.class);
stackBuilder.addNextIntent(intent);
long[] vibrate = {0, 100, 200, 300};
Uri notification = RingtoneManager
.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
PendingIntent contentIntent = stackBuilder.getPendingIntent(0,
PendingIntent.FLAG_UPDATE_CURRENT
| PendingIntent.FLAG_ONE_SHOT);
Bitmap largIcon = BitmapFactory.decodeResource(this.getResources(),
R.mipmap.ic_launcher);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
this).setSmallIcon(R.mipmap.small_icon_notification)
.setContentTitle(getResources().getString(R.string.app_name))
.setLargeIcon(largIcon)
.setSound(notification)
.setStyle(new NotificationCompat.BigTextStyle().bigText(msg))
.setContentText(msg). setSound(notification)
.setStyle((new NotificationCompat.BigTextStyle()).bigText(msg)) .setAutoCancel(true);
mBuilder.setVibrate(vibrate);
mBuilder.setContentIntent(contentIntent);
mNotificationManager.notify((int) System.currentTimeMillis(), mBuilder.build());

To prevent Notification from clearing all activities in backstack, you must setup a Special Activity PendingIntent. A special Activity doesn't need a back stack. Use the manifest to set up the activity task options and create the PendingIntent by calling getActivity().
A PendingIntent specifies an action to take in the future. It lets you pass a future Intent to another application and allow that application to execute that Intent as if it had the same permissions as your application, whether or not your application is still around when the Intent is eventually invoked
By giving a PendingIntent to another application, you are granting it the right to perform the operation you have specified as if the other application was yourself (with the same permissions and identity).
The following code snippet demonstrates the process:
// Instantiate a Builder object.
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
// Creates an Intent for the Activity
Intent notifyIntent =
new Intent(new ComponentName(this, ResultActivity.class));
// Sets the Activity to start in a new, empty task
notifyIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
Intent.FLAG_ACTIVITY_CLEAR_TASK);
// Creates the PendingIntent
PendingIntent notifyIntent = PendingIntent.getActivity(this,0,notifyIntent,PendingIntent.FLAG_UPDATE_CURRENT);
// Puts the PendingIntent into the notification builder
builder.setContentIntent(notifyIntent);
// Notifications are issued by sending them to the
// NotificationManager system service.
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// Builds an anonymous Notification object from the builder, and
// passes it to the NotificationManager
mNotificationManager.notify(id, builder.build());
Here's a useful link How to Setup a Special Activity PendingIntent:
http://developer.android.com/training/notify-user/navigation.html

From
PendingIntent contentIntent = stackBuilder.getPendingIntent(0,
PendingIntent.FLAG_UPDATE_CURRENT
| PendingIntent.FLAG_ONE_SHOT);
To
PendingIntent contentIntent = stackBuilder.getPendingIntent(99,
PendingIntent.FLAG_UPDATE_CURRENT
| PendingIntent.FLAG_ONE_SHOT);
Just change the requestCode and it works.

Bringing to front app in background using a notification (emulating same home screen icon behaviour)

I know there are other similar questions, and I've tried them all, WITHOUT success. That's why I'm posting my code here, in case someone can visualize the proper solution for my case and suggest a specific action in the code, please help.
I've tried: Adding some tags to the manifest file in the activity called by the intent, adding flags and actions and categories to the actual intent in the code, creating a dummy activity to be call in the intent with finish(), etc.
Thanks for any suggestion.
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle(getString(R.string.app_name))
.setStyle(new NotificationCompat.BigTextStyle().bigText(getString(R.string.lampp)))
.setAutoCancel(true)
.setContentText(getString(R.string.lampp));
Intent resultIntent = new Intent(this, MainActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(MainActivity.class);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(0, mBuilder.build());
Thanks to a combination of the answer posted by #Merlevede and a previous post, this is how it was solved:
Use this code for your Notification:
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle(getString(R.string.app_name))
.setStyle(new NotificationCompat.BigTextStyle().bigText(getString(R.string.lampp)))
.setAutoCancel(false)
.setContentText(getString(R.string.lampp));
Intent resultIntent = new Intent(this, NotiActivity.class);
resultIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent resultPendingIntent = PendingIntent.getActivity(this,0,resultIntent,PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(0, mBuilder.build());
And this is the code for the dummy Activity called in the intent NotiActivity.class:
public class NotiActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
finish();
}
}
Hope this helps someone out there.

I don't know if this might be useful to you. You might be missing some flags on your notification intent, specially take a look at FLAG_ACTIVITY_CLEAR_TOP and FLAG_ACTIVITY_SINGLE_TOP.
I use a notification for a service using this code.
Intent notificationIntent = new Intent(this, ActivityMain.class);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder.setContentIntent(pendingIntent)
There are a few differences with your code. Also I'm using this notification from a service so I'm using startForeground to set the notification.
It's worth giving it a try.

Android notification Resume Activity

I'm trying to make a notification when users pause my app. So to make it easier, users can go quickly to the application using notificaction. This is the code i'm using. It works for all versions before android 4 and i don't know which is the problem
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("Titulo")
.setContentText("Titulo");
mBuilder.setOngoing(true);
// Creates an explicit intent for an Activity this
Intent resultIntent = new Intent(getApplicationContext(), MainActivity.class);
// put the flags
resultIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
// Adds the back stack for the Intent (but not the Intent itself)
stackBuilder.addParentStack(MainActivity.class);
// Adds the Intent that starts the Activity to the top of the stack
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent =
stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// mId allows you to update the notification later on.
mNotificationManager.notify(mId, mBuilder.build());
So when i press the notification in android 4.0 and higher, the activity is created again instead of resume. any help please, i can't make it work.
EDIT ( forget about manifest singletop )
android:launchMode="singleTop" same result, not working...
My activity contains a map. I'm using the new version of google maps. v2.

I just tried PendingIntent.FLAG_CANCEL_CURRENT and seems to work for me
public void showNotification(String header,String message){
// define sound URI, the sound to be played when there's a notification
Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Intent intent = new Intent(this, MainActivity.class);
//PendingIntent.FLAG_CANCEL_CURRENT will bring the app back up again
PendingIntent pIntent = PendingIntent.getActivity(MainActivity.this,PendingIntent.FLAG_CANCEL_CURRENT, intent, 0);
Notification mNotification = new Notification.Builder(this)
.setContentTitle(header)
.setContentText(message)
.setSmallIcon(R.drawable.ic_launcher)
.setContentIntent(pIntent)
.setSound(soundUri)
.addAction(R.drawable.ic_launcher, "View", pIntent)
.addAction(0, "Remind", pIntent)
.setOngoing(true)//optional
.build();
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
notificationManager.notify(0, mNotification);
}

Use android:launchMode="singleTop" in the manifest declaration of MainActivity

The only solution that actually worked for me after doing a lot of search is to do the following :
NotificationCompat.Builder builder = new NotificationCompat.Builder(this).set...(...).set...(..);
Intent resultIntent = new Intent(this, MainClass.class);
resultIntent.setAction("android.intent.action.MAIN");
resultIntent.addCategory("android.intent.category.LAUNCHER");
PendingIntent resultPendingIntent = PendingIntent.getActivity(this, 0, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(0, builder.build());
this opens your current activiy without creating another one !

SOLUTION provided by #Patrick taken from the question and added as answer:
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.logo)
.setContentTitle(getString(R.string.txt))
.setContentText(getString(R.string.txt));
mBuilder.setOngoing(true);
// Creates an explicit intent for an Activity in your app
Intent resultIntent = new Intent(this, Activity.class);
resultIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
// The stack builder object will contain an artificial back stack for the
// started Activity.
// This ensures that navigating backward from the Activity leads out of
// your application to the Home screen.
TaskStackBuilder stackBuilder = TaskStackBuilder.from(this);
// Adds the back stack for the Intent (but not the Intent itself)
stackBuilder.addParentStack(Activity.class);
// Adds the Intent that starts the Activity to the top of the stack
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = PendingIntent.getActivity(this, 0, resultIntent, 0);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// mId allows you to update the notification later on.
mNotificationManager.notify(mId, mBuilder.getNotification());