Develop Reference

Starting Activity from a notification - Android Studio

I am trying to start an activity from a notification. Upon starting that activity, I add data via intent.putextra to the intent so the activity shows the right content for the situation.
The activity that is being started is supposed to be open only once in the stack. I did achieve this via
android:launchMode="singleTop"
in my manifest.
However - and now I come to my question - if this activity is already running, I want it to close and replace it with the instance I am creating with the specific additional data (put extra). How can I achieve this?
Heres the code of my notification:
public void newMessageNotification(String title, String message, String otherusernumber, String requestStatus, String sendername) {
notificationManager = NotificationManagerCompat.from(this);
Intent chatIntent = new Intent(this,ChatActivity.class);
//these three strings define the behaviour of the chat activtity
chatIntent.putExtra("otherUsername", sendername);
chatIntent.putExtra("otherUsernumber", otherusernumber);
chatIntent.putExtra("requestStatus", requestStatus);
chatIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent contentIntent = PendingIntent.getActivity(this, (int) System.currentTimeMillis(), chatIntent,
PendingIntent.FLAG_UPDATE_CURRENT);;
Notification notification = new NotificationCompat.Builder(this, CHANNEL_1_ID)
.setSmallIcon(R.drawable.ic_new_message)
.setContentTitle(title)
.setContentText(message)
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setCategory(NotificationCompat.CATEGORY_MESSAGE)
.setContentIntent(contentIntent)
.setAutoCancel(true)
.build();
notificationManager.notify(1, notification);
}

Try below code
Add PendingIntent in notification
Intent intent = new Intent(this, OpenActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
pendingIntent = PendingIntent.getActivity(this, (int) System.currentTimeMillis(), intent,
PendingIntent.FLAG_UPDATE_CURRENT);
Full create notification code
Intent intent = new Intent(this, OpenActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, (int) System.currentTimeMillis(), intent,
PendingIntent.FLAG_UPDATE_CURRENT);
NotificationManager notificationManager =
(NotificationManager) getSystemService (Context.NOTIFICATION_SERVICE);
Uri defaultSoundUri = RingtoneManager . getDefaultUri (RingtoneManager.TYPE_NOTIFICATION);
Notification notification;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
// The id of the channel.
String Ch_id = "yourappname_01";
// The user-visible name of the channel.
CharSequence name = "Notification";
// The user-visible description of the channel.
//String description = getString(R.string.channel_description);
int importance = NotificationManager . IMPORTANCE_HIGH;
NotificationChannel mChannel = new NotificationChannel(Ch_id, name, importance);
mChannel.setSound(defaultSoundUri, new AudioAttributes . Builder ().build());
notificationManager.createNotificationChannel(mChannel);
// Create a notification and set the notification channel.
notification = new Notification . Builder (this, Ch_id)
.setSmallIcon(R.drawable.notify)
.setContentTitle(getResources().getString(R.string.app_name))
.setContentText(remoteMessage.getData().get("title"))
.setAutoCancel(true)
.setContentIntent(pendingIntent) //Add PendingIntent
.setChannelId(Ch_id)
.build();
} else {
// Create a notification
notification = new Notification . Builder (this)
.setSmallIcon(R.drawable.notify)
.setContentTitle(getResources().getString(R.string.app_name))
.setContentText(remoteMessage.getData().get("title"))
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setContentIntent(pendingIntent) //Add PendingIntent
.build();
}
//Generate Diff Notification
int m =(int)((new Date ().getTime() / 1000L) % Integer.MAX_VALUE);
notificationManager.notify(m, notification);
Update
Intent intent = new Intent(this, OpenActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
PendingIntent pendingIntent = PendingIntent.getActivity(this, (int) System.currentTimeMillis(), intent,
PendingIntent.FLAG_ONE_SHOT);
I hope this can help you!
Thank You.

Try to add flag: Intent.FLAG_ACTIVITY_NEW_TASK to your Intent

Try Below
Intent intent = new Intent(this, ActivityDestination.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
//pendingIntent = PendingIntent.getActivity(this, 0,intent,PendingIntent.FLAG_ACTIVITY_NEW_TASK);

How to group android notifications like whatsapp? as setGroup not work for me

I am currently test on Oreo and lollipop devices. What I am done so far:
final static String GROUP_KEY_NOTIFY = "group_key_notify";
int notificationId0 = 100;
int notificationId1 = 101;
int notificationId2 = 102;
int notificationId3 = 103;
NotificationCompat.Builder builderSummary =
new NotificationCompat.Builder(this)
.setSmallIcon(android.R.drawable.ic_dialog_info)
.setContentTitle("A Bundle Example")
.setContentText("You have 3 new messages")
.setGroup(GROUP_KEY_NOTIFY)
.setGroupSummary(true);
NotificationCompat.Builder builder1 =
new NotificationCompat.Builder(this)
.setSmallIcon(android.R.drawable.ic_dialog_info)
.setContentTitle("New Message")
.setContentText("You have a new message from Kassidy")
.setGroup(GROUP_KEY_NOTIFY);
NotificationCompat.Builder builder2 =
new NotificationCompat.Builder(this)
.setSmallIcon(android.R.drawable.ic_dialog_info)
.setContentTitle("New Message")
.setContentText("You have a new message from Caitlyn")
.setGroup(GROUP_KEY_NOTIFY);
NotificationCompat.Builder builder3 =
new NotificationCompat.Builder(this)
.setSmallIcon(android.R.drawable.ic_dialog_info)
.setContentTitle("New Message")
.setContentText("You have a new message from Jason")
.setGroup(GROUP_KEY_NOTIFY);
NotificationManager notifyMgr =
(NotificationManager) getSystemService(NOTIFICATION_SERVICE);
notifyMgr.notify(notificationId1, builder1.build());
notifyMgr.notify(notificationId2, builder2.build());
notifyMgr.notify(notificationId3, builder3.build());
notifyMgr.notify(notificationId0, builderSummary.build());
What I am noticing, if there is 4 or more notifications occurs then they are bundled together but when there are less than 4 notification they are not bundled in android device above N. I read the documentations and doing what they are saying like using setGroup method and make separate notification object for summaryNotification. But nothing gets work for me.

You can use this link for reference for creating bundled notification.
Example:
String GROUP_KEY_WORK_EMAIL = "com.android.example.WORK_EMAIL";
Notification newMessageNotification = new
NotificationCompat.Builder(MainActivity.this, CHANNEL_ID)
.setSmallIcon(R.drawable.new_mail)
.setContentTitle(emailObject.getSenderName())
.setContentText(emailObject.getSubject())
.setLargeIcon(emailObject.getSenderAvatar())
.setGroup(GROUP_KEY_WORK_EMAIL)
.build();
Notification summaryNotification =
new NotificationCompat.Builder(MainActivity.this, CHANNEL_ID)
.setContentTitle(emailObject.getSummary())
//set content text to support devices running API level < 24
.setContentText("Two new messages")
.setSmallIcon(R.drawable.ic_notify_summary_status)
//build summary info into InboxStyle template
.setStyle(new NotificationCompat.InboxStyle()
.addLine("Alex Faarborg Check this out")
.addLine("Jeff Chang Launch Party")
.setBigContentTitle("2 new messages")
.setSummaryText("janedoe#example.com"))
//specify which group this notification belongs to
.setGroup(GROUP_KEY_WORK_EMAIL)
//set this notification as the summary for the group
.setGroupSummary(true)
.build();
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
notificationManager.notify(emailNotificationId1, newMessageNotification);
notificationManager.notify(SUMMARY_ID, summaryNotification);

You have to bundle the notifications into a group using Summary Notification Builder to ensure proper grouping. Below is my working code:
NotificationManager notificationManager;
NotificationCompat.Builder summaryNotificationBuilder;
int bundleNotificationId = 100;
int singleNotificationId = 100;
private void notificationGroup(Map<String, String> message) {
// Create Notification
String contentTitle = message.get("contentTitle");
String contentText = message.get("contentText");
Bitmap bm = BitmapFactory.decodeResource(getApplication().getResources(),
R.drawable.user3);
Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// Notification Group Key
String groupKey = "bundle_notification_" + bundleNotificationId;
// Notification Group click intent
Intent resultIntent = new Intent(this, MainActivity.class);
resultIntent.putExtra("notification", "Summary Notification");
resultIntent.putExtra("notification_id", bundleNotificationId);
resultIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent resultPendingIntent = PendingIntent.getActivity(this, bundleNotificationId, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
// We need to update the bundle notification every time a new notification comes up
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
if (notificationManager.getNotificationChannels().size() < 2) {
NotificationChannel groupChannel = new NotificationChannel("bundle_channel_id", "bundle_channel_name", NotificationManager.IMPORTANCE_LOW);
notificationManager.createNotificationChannel(groupChannel);
NotificationChannel channel = new NotificationChannel("channel_id", "channel_name", NotificationManager.IMPORTANCE_DEFAULT);
notificationManager.createNotificationChannel(channel);
}
}
summaryNotificationBuilder = new NotificationCompat.Builder(this, "bundle_channel_id")
.setGroup(groupKey)
.setGroupSummary(true)
.setContentTitle(contentTitle)
.setContentText(contentText)
.setSmallIcon(R.drawable.app_logo)
.setLargeIcon(bm)
.setAutoCancel(true)
.setContentIntent(resultPendingIntent);
if (singleNotificationId == bundleNotificationId)
singleNotificationId = bundleNotificationId + 1;
else
singleNotificationId++;
// Individual notification click intent
resultIntent = new Intent(this, NotificationActivity.class);
resultIntent.putExtra("notification", "Single Notification");
resultIntent.putExtra("notification_id", singleNotificationId);
resultIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
resultPendingIntent = PendingIntent.getActivity(this, singleNotificationId, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder notification = new NotificationCompat.Builder(this, "channel_id")
.setGroup(groupKey)
.setContentTitle(contentTitle)
.setContentText(contentText)
.setSmallIcon(R.drawable.app_logo)
.setLargeIcon(bm)
.setSound(defaultSoundUri)
.setAutoCancel(true)
.setGroupSummary(false)
.setContentIntent(resultPendingIntent);
notificationManager.notify(singleNotificationId, notification.build());
notificationManager.notify(bundleNotificationId, summaryNotificationBuilder.build());
}
Happy Coding!

Local notification in android from database

my requirement is to generate local notification when current time matches with the values in the database.But now the problem is that when I am clicking on the notification it should take me to the specific product details using the product id.
I have generated the notification but how can I get the product title/id to the product details page.
Code----------------
for (int i=0;i < alertList.size();i++) {
Random random = new Random();
int m = random.nextInt(9999 - 1000) + 1000;
msg=alertList.get(i).getProf_name()+" have to take "+alertList.get(i).getMed_name()+" ;"+alertList.get(i).getMed_id();
Log.d("MediMSg",""+msg);
Log.d("MediMSg",""+msg);
Intent notificationIntent = new Intent(context, MedicineNotificationActivity.class);
notificationIntent.putExtra("pushmsg",msg);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addParentStack(MedicineNotificationActivity.class);
stackBuilder.addNextIntent(notificationIntent);
PendingIntent pendingIntent = stackBuilder.getPendingIntent(100, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
Notification notification = builder.setContentTitle("Test")
.setContentText(msg)
.setTicker("Notification from Test")
.setSmallIcon(getNotificationIcon())
.setPriority(Notification.PRIORITY_MAX)
.setAutoCancel(true)
.setColor(0x0091ea)
.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
.setContentIntent(pendingIntent).build();
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(m,notification);
Log.d("Random",""+m);
}

When you generate the notification, but the product title/id in the intent as extras. Then in your activity which is started byclicking the notification. You can access these extras.
You can create an array outside the loop, if you have multiple ids, like this:
int[] ids = new int[alertList.size()];
Then in the loop, iterate and set the id for each one on their respective indices.
for (int i=0;i < alertList.size();i++) {
ids[i] = YOUR_ID;
//OTHER Code
}
Lastly, put extra like this:
notificationIntent.putExtra("ids", ids);

NotificationCompat not grouping notifications

I'm trying to group my notifications but apparently they keep coming separately.
NotificationManager mNotificationManager = (NotificationManager)
this.getSystemService(Context.NOTIFICATION_SERVICE);
Intent resultIntent = new Intent(this, SplashScreenBaseActivity.class);
resultIntent.putExtra(Arguments.ARG_NOTIFICATION_TYPE, NEWS_TYPE);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent =
stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher_small)
.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher))
.setContentTitle(contentTitle)
.setContentText(contentText)
.setAutoCancel(true)
.setGroup(NEWS_GROUP)
.setGroupSummary(true)
.setDefaults(-1);
mBuilder.setContentIntent(resultPendingIntent);
Random random = new Random();
NOTIFICATION_ID = random.nextInt(9999 - 1000) + 1000;
mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());

Notification inbox style however gets updated when a notification comes

I am trying to make a notification style where I want all notification would under one hood and they will be shown line wise. If a new notification comes, it should be under the second latest. The list of notification should be of 5, that means only latest 5 will be displayable.
I am using this below code for this, I don't know how to achieve this, I tried my hands StackBuilder too however I got that, this would work from higher API than I am using one now.
NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
Intent notificationIntent = new Intent(this, GcmActivity.class);
notificationIntent.putExtra("title", messagetype);
notificationIntent.putExtra("message", msg);
PendingIntent intent = PendingIntent.getActivity(this, 0,notificationIntent, 0);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
| Intent.FLAG_ACTIVITY_SINGLE_TOP);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this).setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("MY MESSENGER").setContentText("MESSAGES");
NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
inboxStyle.setBigContentTitle("MESSAGES" + " Details");
inboxStyle.addLine(messagetype + ":" + msg);
mBuilder.setStyle(inboxStyle);
mBuilder.setContentIntent(intent);
mBuilder.setAutoCancel(true);
notificationManager.notify(Integer.parseInt("0"), mBuilder.build());
I know I can do this by adding any number of line while creating
NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
However I want that when ever my GCMIntentService will be called, this list will be updated.
I tried the work using this below code as well however that did not work either
NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
Intent notificationIntent = new Intent(this, GcmActivity.class);
notificationIntent.putExtra("title", messagetype);
notificationIntent.putExtra("message", msg);
PendingIntent intent = PendingIntent.getActivity(this, 0,notificationIntent, 0);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
| Intent.FLAG_ACTIVITY_SINGLE_TOP);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
this).setAutoCancel(true)
.setContentTitle("MY MESSENGER")
.setSmallIcon(R.drawable.ic_launcher)
.setContentText("MESSAGES");
NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
for(int j= 0; j<listMessage.size(); j++)
inboxStyle.addLine(listMessage.get(j));
mBuilder.setStyle(inboxStyle);
mBuilder.setContentIntent(intent);
notificationManager.notify(0, mBuilder.build());

I had the same issue and fixed it by persisting the notifications on the database to load them when a new one arrives, and delete them on click or delete.
DatabaseHelper dbHelper = new DatabaseHelper(this);
Cursor notifications = dbHelper.getAllNotifications();
NotificationCompat.Builder mBuilder = extractNotifications(title, msg, contentIntent, notifications);
dbHelper.insertNotification(title + ": " + msg);
private NotificationCompat.Builder extractNotifications(String title, String msg, PendingIntent contentIntent, Cursor notifications) {
NotificationCompat.Builder mBuilder;
mBuilder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_icon)
.setContentTitle(title)
.setStyle(new NotificationCompat.BigTextStyle()
.bigText(NOTIFICAITONS))
.setContentText(msg)
.setAutoCancel(true)
.setLights(Color.WHITE, 1000, 5000)
.setDefaults(Notification.DEFAULT_VIBRATE |
Notification.DEFAULT_SOUND | Notification.DEFAULT_LIGHTS)
.setContentIntent(contentIntent);
NotificationCompat.InboxStyle inboxStyle =
new NotificationCompat.InboxStyle();
inboxStyle.setBigContentTitle(NOTIFICAITONS);
while (notifications.moveToNext())
{
inboxStyle.addLine(notifications.getString(notifications.getColumnIndex(DatabaseHelper.NOTIFICATION_MESSAGE)));
}
inboxStyle.addLine(title + ": " + msg);
mBuilder.setStyle(inboxStyle);
return mBuilder;

You need to do that yourself, by assigning own ID to your notification you will be able to update it later. And you need to build the notification yourself too, by concatenating messages