Develop Reference

How to open current activity which is open while click on notification

I have try all the methods but it doesn't work for me. i want to open or resume app with whatever screen open while click on notification.
I used following method:
NotificationCompat.BigTextStyle notiStyle = new NotificationCompat.BigTextStyle();
notiStyle.setBigContentTitle(team);
notiStyle.bigText(message);
Intent resultIntent = new Intent(this, MainDrawerActivity.class);
resultIntent.putExtra("fromNotification", "notification");
resultIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
| Intent.FLAG_ACTIVITY_SINGLE_TOP);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,
PendingIntent.FLAG_UPDATE_CURRENT);
int icon = R.mipmap.ic_launcher;
return new NotificationCompat.Builder(this).setSmallIcon(icon)
.setAutoCancel(true)
.setContentIntent(resultPendingIntent).setContentTitle(team)
.setContentText(message).setStyle(notiStyle).build();

To raise your application to the foreground without starting any new activity, fire its launcher intent.
This method is from an old project of mine.
/**
* Creates a new launcher intent, equivalent to the intent generated by
* clicking the icon on the home screen.
*
* #return the launcher intent
*/
public static Intent newLauncherIntent(final Context context) {
final Intent intent = new Intent(context, MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
return intent;
}
The intent created by this method does not start a new task if the app is running, even though it has that flag.
This is another way to obtain a launcher intent. However, I found that this intent would always start a new task, which is not what you want if the app is running.
final Intent intent = context.getPackageManager()
.getLaunchIntentForPackage(BuildConfig.APPLICATION_ID);

This is working fine for following three conditions:
1.if app already open and click on notification, notification should remove from status bar.
2.if app is open and in background then app should resume with whatever screen open already previously.
3.if app is close and click on notification in status bar then app should open.
private final static int NORMAL = 0x00;
private final static int BIG_TEXT_STYLE = 0x01;
private static NotificationManager mNotificationManager;
in onMessage call
mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
new CreateNotification(BIG_TEXT_STYLE, team, message).execute();
then declare following class in GCMIntentService.
public class CreateNotification extends AsyncTask {
int style = NORMAL;
String team, message;
public CreateNotification(int style, String team, String message) {
this.style = style;
this.team = team;
this.message = message;
}
#Override
protected Void doInBackground(Void... params) {
Notification noti = new Notification();
switch (style) {
case BIG_TEXT_STYLE:
noti = setBigTextStyleNotification(team, message);
break;
}
noti.sound = (null);
noti.defaults = 0;
noti.sound = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.beep);
noti.flags |= Notification.FLAG_AUTO_CANCEL;
mNotificationManager.notify(0, noti);
return null;
}
}
and finally
private Notification setBigTextStyleNotification(String team, String message) {
// Create the style object with BigTextStyle subclass.
NotificationCompat.BigTextStyle notiStyle = new NotificationCompat.BigTextStyle();
notiStyle.setBigContentTitle(team);
notiStyle.bigText(message);
Intent resultIntent = getPackageManager()
.getLaunchIntentForPackage(getPackageName());
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
// 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);
int icon = R.mipmap.ic_launcher;
return new NotificationCompat.Builder(this).setSmallIcon(icon)
.setAutoCancel(true)
.setContentIntent(resultPendingIntent).setContentTitle(team)
.setContentText(message).setStyle(notiStyle).build();
}

You should have something like this in Application class to store the current activity.
private BaseActivity mCurrentActivity = null;
public BaseActivity getCurrentActivity() {
return mCurrentActivity;
}
public void setCurrentActivity(BaseActivity currentActivity) {
this.mCurrentActivity = currentActivity;
}
Then, inside your handle notification Service class.
#Override
public void onMessageReceived(RemoteMessage remoteMessage) {
super.onMessageReceived(remoteMessage);
BaseActivity currentActivity = ((App) this.getApplicationContext())
.getCurrentActivity();
Intent intent;
if (currentActivity instanceof ActivityA) {
intent = new Intent(this, ActivityA.class);
} else if (currentActivity instanceof ActivityB) {
intent = new Intent(this, ActivityB.class);
} else {
intent = new Intent(this, MainActivity.class);
}
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
PendingIntent.FLAG_UPDATE_CURRENT);
// your code...
}
If your app is killed, default activity will be called, such as MainActivity.
Else, when you receive & click push notification message when app is on foreground or background. Current activity will stay there as default activity, such as ActivityA & ActivityB. Then you can navigate to wherever another activities or fragments.
My suggestion, better we should use Fragment, it's easier in navigate to specially screen from push notification.

//I am using write now this can possible
NotificationManager notificationManager = (NotificationManager) context
.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(icon, message, when);
Intent notificationIntent = new Intent(context, HomeActivity.class);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
| Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent intent = PendingIntent.getActivity(context, 0,
notificationIntent, 0);
notification.setLatestEventInfo(context, title, message, intent);
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(0, notification);

If you want to just resume the app state then instead of multiple activity I will suggest you just keep single activity and use Fragments for different screen.
On Notification click you need to define entry point of app in notification payload and the entry point decide what will be the next navigation.
If you are having only single activity then you can define that activity as a entry point and on the activity you can decide do you have to push new fragment or not.
Or second option if you are using firebase then push all notification as background notification and onMessageReceive method you can get top activity from activity stack and set that activity as entry point for the notification. But there is still problem as user may be click on notification after navigate from set entry point activity which again problem. So I prefer to go with first one approach.

make new activity
public class FinishImmediateActivity extends AppCompatActivity {
#Override protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
finish();
}
}
add to manifest.xml
<activity android:name=".FinishImmediateActivity"/>
check app is running
public static boolean isMainActivityRunning() {
ActivityManager activityManager = (ActivityManager) MyApp.getContext().getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> tasksInfo = activityManager.getRunningTasks(Integer.MAX_VALUE);
for (int i = 0; i < tasksInfo.size(); i++) {
if (tasksInfo.get(i).baseActivity.getPackageName().equals(MyApp.getContext().getPackageName())) {
return true;
}
}
return false;
}
then call that activity in notification intent.
Intent resultIntent = new Intent(this, isMainActivityRunning() ? FinishImmediateActivity.class : HomeActivity.class);

By this way also we can achieve the above result:
try {
int icon;
icon = R.mipmap.ic_launcher;
int mNotificationId = 001;
Intent intent = new Intent(this, MainDrawerActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
//FLAG_UPDATE_CURRENT is important
PendingIntent pendingIntent = PendingIntent.getActivity(this,
(int)System.currentTimeMillis(), intent,
PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder mBuilder = new
NotificationCompat.Builder(
this);
Notification notification =
mBuilder.setSmallIcon(icon).setTicker(json.getString("team")).setWhen(0)
.setAutoCancel(true)
.setContentTitle(json.getString("team"))
.setStyle(new
NotificationCompat.BigTextStyle().bigText(json.getString("message")))
.setContentIntent(pendingIntent)
.setSound(Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.beep))
NotificationManager notificationManager = (NotificationManager)
this.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(mNotificationId, notification);
} catch (Exception e) {
e.printStackTrace();
}

How to destroy MainActivity first and start it again once receive notification

Hello I am working on android app where I am using GCM concept. Once app receive notification then on click I am starting MainActivity.
If MainActivity is already running and app receive notification then already running MainActivity should finish and restart, and if it not running then simply start it.
There should be flag to do this same. can anyone help me what is that flag ?
GcmIntentService.java.
public class GcmIntentService extends IntentService {
public GcmIntentService() {
super("GcmIntentService");
}
public static final String TAG = "GcmIntentService";
#Override
protected void onHandleIntent(Intent intent) {
Bundle extras = intent.getExtras();
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
String messageType = gcm.getMessageType(intent);
String message = extras.getString("message").toString();
String notificationTitle = extras.getString("title");
if (!extras.isEmpty()) {
if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE.equals(messageType)) {
sendNotification(message, notificationTitle);
}
}
// Release the wake lock provided by the WakefulBroadcastReceiver.
GcmBroadcastReceiver.completeWakefulIntent(intent);
}
// Put the message into a notification and post it.
// This is just one simple example of what you might choose to do with
// a GCM message.
private void sendNotification(String msg, String notificationTitle) {
NotificationManager mNotificationManager = (NotificationManager)
this.getSystemService(Context.NOTIFICATION_SERVICE);
Intent notificationIntent = new Intent(this, ActivityMain.class);
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
notificationIntent.putExtra("notification_message", msg);
notificationIntent.putExtra("notification", true);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.app_icon)
.setContentTitle(notificationTitle)
.setStyle(new NotificationCompat.BigTextStyle()
.bigText(msg))
.setContentText(msg);
mBuilder.setDefaults(-1);
mBuilder.setAutoCancel(true);
mBuilder.setContentIntent(contentIntent);
mNotificationManager.notify((int)System.currentTimeMillis(), mBuilder.build());
}

If your MainActivity is not running, it will be opened/started (no problem here). In case it is already running then the onNewIntent() method (in your MainActivity) will be called. So you can override it as following:
#Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
init(); //this method will reload the data, or whatever you want to do
}

Try This:
NotificationCompat.Builder mBuilder =new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle(sender)
.setContentText(message);
// Creates an explicit intent for an Activity in your app
Intent resultIntent = new Intent(context, MainActivity.class);
// 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(LoginScreen.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);
Notification notification=mBuilder.build();
notification.flags |= Notification.FLAG_AUTO_CANCEL;
// Play default notification sound
notification.defaults |= Notification.DEFAULT_SOUND;
// Vibrate if vibrate is enabled
notification.defaults |= Notification.DEFAULT_VIBRATE;
// mId allows you to update the notification later on.
mNotificationManager.notify(msg_ID,notification);

You first need to call finish() and then restart MainActivity
finish(); //Close current activity
startActivity(getIntent()); //Restart it

Do this in your main activity to start Activity:
Intent notificationIntent = new Intent(this, MainActivity.class);
startActivity(notificationIntent);
finish();
In your Notification activity intent reopen the Main Activity :
Intent mainIntent = new Intent(this, MainActivity.class);
startActivity(mainIntent);
finish();

how to launch an activity via notification received by GCM and set text in that activitiy android?

I have developed an app in which I used GCM service to get notification, now when I received notification I want to launch an activity and in that activity I have to set a text received by GCM to a textview.My problem is that the activity which is getting launch by tapping on notification is able to set text only when the app is in foreground but not when the app is in background.
here is the code snippet I used.
#SuppressWarnings("deprecation")
private static void generateNotification(Context context, String message) {
int icon = R.drawable.ic_launcher;
long when = System.currentTimeMillis();
NotificationManager notificationManager = (NotificationManager) context
.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(icon, message, when);
String title = context.getString(R.string.app_name);
// Intent notificationIntent = new
// Intent().setClassName("com.ninehertz.bella",
// "com.ninehertz.bella.BellaNotificationActivity");
Intent notificationIntent = new Intent(context,
BellaNotificationActivity.class);
// set intent so it does not start a new activity
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
| Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent intent = PendingIntent.getActivity(context, 0,
notificationIntent, 0);
notification.setLatestEventInfo(context, title, message, intent);
notification.flags |= Notification.FLAG_AUTO_CANCEL;
// Play default notification sound
notification.defaults |= Notification.DEFAULT_SOUND;
// notification.sound = Uri.parse("android.resource://" +
// context.getPackageName() + "your_sound_file_name.mp3");
// Vibrate if vibrate is enabled
notification.defaults |= Notification.DEFAULT_VIBRATE;
notificationManager.notify(0, notification);
}

Try something like this.
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.notification_icon)
.setContentTitle("My notification")
.setContentText("Hello World!");
// Creates an explicit intent for an Activity in your app
Intent resultIntent = new Intent(this, ResultActivity.class);
//put your extra message from notification and get from bundes in in onCreate in ResultActivity
resultIntent.putExtra(EXTRA_MESSAGE,message);
// 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(this);
// Adds the back stack for the Intent (but not the Intent itself)
stackBuilder.addParentStack(ResultActivity.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());

you can try this code.I have no problem whether the app in foreground or background.
private static void generateNotification(Context context, String message) {
//NotificationActivity will be called when tapping notification
Intent notificationIntent = new Intent(context, NotificationActivity.class);
//this message will be carried away to NotificationActivity and you can setetxt
notificationIntent.putExtra("msg",message);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent intent =PendingIntent.getActivity(context, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder noti = new NotificationCompat.Builder(context)
.setContentTitle(context.getString(R.string.app_name))
.setContentText(" New message ")
.setSmallIcon(R.drawable.city)
.setAutoCancel(true)
.setDefaults(Notification.DEFAULT_VIBRATE)
.setContentIntent(intent);
NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
noti.setAutoCancel(true);
notificationManager.notify(001,noti.build());
}

How to properly clear all notification once clicked?

I send a few notification on the notification bar, i wanted to clear all of it when one of the notification is clicked. For now I clear one by one by using Flag. I know notificationManager.cancelAll() could clear all the notification but where should i put so that i can trigger once one of the notification is clicked.
private static void generateNotification(Context context, String message) {
int icon = R.drawable.ic_launcher;
long when = System.currentTimeMillis();
NotificationManager notificationManager = (NotificationManager)
context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(icon, message, when);
String title = context.getString(R.string.app_name);
Intent notificationIntent = new Intent(context, MainActivity.class);
// set intent so it does not start a new activity
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent intent =
PendingIntent.getActivity(context, 0, notificationIntent, 0);
notification.setLatestEventInfo(context, title, message, intent);
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(msgid, notification);
//notificationManager.cancelAll(); //i wan to clear all when the notification is clicked, where should i put this line?
}

My solution is to call it at onResume().
#Override
protected void onResume() {
super.onResume();
// Clear all notification
NotificationManager nMgr = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
nMgr.cancelAll();
}

You should use a pending intent that sends a broadcast and then put in place a broadcast receiver that will cancel all your notifications. It is best to memorize all notifications IDs and delete them one by one.

Android notification bar open last active activity?

I am creating like timer application and when I start timer I have option to go to android Home or start any other activity .
When I start timer I set a notification bar icon and if i use some other application (mean go from started timer activity) and now I need to go to back to my previously started timer activity by clicking on notification icon ???
When I click I am starting a new instance timer activity , not the previously started timer activity ! , and if I then click back button it show me a previously timer activity ..
Question is: How to call previously started activity trough notification bar , not to start new instance of that activity ??
This is sample of my code below :
private void notificationBar()
{
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
int icon = R.drawable.ico;
CharSequence tickerText = "some title...";
long when = System.currentTimeMillis();
Notification notification = new Notification(icon, tickerText, when);
Context context = getApplicationContext();
CharSequence contentTitle = "some app title";
CharSequence contentText = "...some info !";
Intent notificationIntent = new Intent(this, main.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT | Notification.FLAG_AUTO_CANCEL);
notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
mNotificationManager.notify(NOTIF_ID, notification);
}
private void notificationClose(int notifID)
{
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
mNotificationManager.cancel(notifID);
}

I found an answer it's about flags :
Android: new Intent() starts new instance with android:launchMode="singleTop"
Intent intent= new Intent(context, YourActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);

I'm not certain I understand what you mean.
I suppose you could add an extra in the intent to specify which notification exactly was used to invoke your app. Does this help at all?