How to display multiple notifications in android

Question

I am receiving only one notification and if there comes another notification  it replaces the previous one and here is my code  private static void generateNotification Context context  String message          String key        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              FragmentOpenActivity class       notificationIntent putExtra key  key          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       notification defaults    Notification DEFAULT SOUND          notification sound   Uri parse  android resource              context getPackageName      your sound file name mp3        notification defaults    Notification DEFAULT VIBRATE      notificationManager notify 0  notification

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declare class member static int i   0   mNotificationManager notify   i  mBuilder build

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For Kotlin    notificationManager notify Calendar getInstance   timeInMillis toInt   notificationBuilder build

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i guess this will help someone   in below code  not nu   is an random int     PendingIntent and Notification have the same ID    so that on each notification click the intent will direct to different activity     private void sendNotification String message String title JSONObject extras  throws JSONException      String id   extras getString  actionParam        Log e  gcm   id      id       Intent intent   new Intent this  OrderDetailActivty class       intent putExtra  id   id       intent addFlags Intent FLAG ACTIVITY CLEAR TOP       final int not nu generateRandom        PendingIntent pendingIntent   PendingIntent getActivity this  not nu    Request code     intent              PendingIntent FLAG ONE SHOT        Uri defaultSoundUri  RingtoneManager getDefaultUri RingtoneManager TYPE NOTIFICATION       NotificationCompat Builder notificationBuilder   new NotificationCompat Builder this               setSmallIcon R mipmap ic cart red               setContentTitle title               setContentText message               setAutoCancel true               setSound defaultSoundUri               setContentIntent pendingIntent        NotificationManager notificationManager                NotificationManager  getSystemService Context NOTIFICATION SERVICE        notificationManager notify not nu    ID of notification     notificationBuilder build       public int generateRandom        Random random   new Random        return random nextInt 9999 - 1000    1000

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The problem is with your notificationId  Think it as an array index  Each time you update your notification  the notificationId is the place it takes to store value  As you are not incrementing your int value  in this case  your notificationId   this always replaces the previous one  The best solution I guess is to increment it just after you update a notification  And if you want to keep it persistent  then you can store the value of your notificationId in sharedPreferences  Whenever you come back  you can just grab the last integer value  notificationId stored in sharedPreferences  and use it

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Below is the code for pass unique notification id      CommonUtilities getValudeFromOreference  is the method created by me to get value from savedPreferences  String notificationId   CommonUtilities getValueFromPreference context  Global NOTIFICATION ID   0    int notificationIdinInt   Integer parseInt notificationId    notificationManager notify notificationIdinInt  notification       will increment notification id for uniqueness notificationIdinInt   notificationIdinInt   1  CommonUtilities saveValueToPreference context  Global NOTIFICATION ID  notificationIdinInt          Above  CommonUtilities saveValueToPreference  is the method created by me to save new value in savePreferences    Reset notificationId in savedPreferences at specific range like I have did it at 1000  So it will not create any issues in future  Let me know if you need more detail information or any query

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You need to add a unique ID to each of the notifications so that they do not combine with each other  You can use this link for your reference     https   github com sanathe06 AndroidGuide tree master ExampleCompatNotificationBuilder

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val notifyIdLong     Date   time   1000L    Integer MAX VALUE  var notifyIdInteger   notifyIdLong toInt   if  notifyIdInteger  lt  0  notifyIdInteger   -1    notifyIdInteger    if it s -ve change to positive notificationManager notify notifyIdInteger  mBuilder build    log d TAG  notifyId    notifyIdInteger

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Replace your line with this   notificationManager notify  int    new Date   getTime     1000L    Integer MAX VALUE   notification

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Another way of doing it is take the current date convert it into long just take the last 4 digits  There is a high probability that the number will be unique       long time   new Date   getTime        String tmpStr   String valueOf time       String last4Str   tmpStr substring tmpStr length   -5       int notificationId   Integer valueOf last4Str

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Using Shared Preferences worked for me  SharedPreferences prefs   getSharedPreferences Activity class getSimpleName    Context MODE PRIVATE   int notificationNumber   prefs getInt  notificationNumber   0        notificationManager notify notificationNumber   notification   SharedPreferences Editor editor   prefs edit    notificationNumber    editor putInt  notificationNumber   notificationNumber   editor commit

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I solved my problem like this                Issues a notification to inform the user that server has sent a message              private static void generateNotification Context context  String message              String keys  String msgId  String branchId            int icon   R drawable ic launcher          long when   System currentTimeMillis            NotificationCompat Builder nBuilder          Uri alarmSound   RingtoneManager                  getDefaultUri RingtoneManager TYPE NOTIFICATION           nBuilder   new NotificationCompat Builder context                   setSmallIcon R drawable ic launcher                   setContentTitle  Smart Share -     keys                   setLights Color BLUE  500  500  setContentText message                   setAutoCancel true  setTicker  Notification from smartshare                    setVibrate new long     100  250  100  250  100  250                     setSound alarmSound           String consumerid   null          Integer position   null          Intent resultIntent   null          if  consumerid    null                if  msgId    null  amp  amp   msgId equalsIgnoreCase                        if  key    null  amp  amp  key equalsIgnoreCase  Yo  Matter                          ViewYoDataBase db yo   new ViewYoDataBase context                       position   db yo getPosition msgId                       if  position    null                            resultIntent   new Intent context                                  YoDetailActivity class                           resultIntent putExtra  id   Integer parseInt msgId                            resultIntent putExtra  position   position                           resultIntent putExtra  notRefresh    notRefresh                          else                           resultIntent   new Intent context                                  FragmentChangeActivity class                           resultIntent putExtra key  key                                           else if  key    null  amp  amp  key equalsIgnoreCase  Message                          resultIntent   new Intent context                              FragmentChangeActivity class                       resultIntent putExtra key  key                                              else                   resultIntent   new Intent context  FragmentChangeActivity class                   resultIntent putExtra key  key                           else               resultIntent   new Intent context  MainLoginSignUpActivity class                     PendingIntent resultPendingIntent   PendingIntent getActivity context                  notify no  resultIntent  PendingIntent FLAG UPDATE CURRENT           if  notify no  lt  9                notify no   notify no   1            else               notify no   0                    nBuilder setContentIntent resultPendingIntent           NotificationManager nNotifyMgr    NotificationManager  context                  getSystemService context NOTIFICATION SERVICE           nNotifyMgr notify notify no   2  nBuilder build

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You just need to change your one-line from notificationManager notify 0  notification   to  notificationManager notify  int  System currentTimeMillis    notification       This will change the id of notification whenever the new notification will appear

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At the place of uniqueIntNo put unique integer number like this    mNotificationManager notify uniqueIntNo  builder build

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A simple counter may solve your problem    private Integer notificationId   0   private Integer incrementNotificationId        return notificationId       NotificationManager notify incrementNotificationId  notification

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Use the following method in your code   Method call  -  notificationManager notify getCurrentNotificationId getApplicationContext     notification     Method -      Returns a unique notification id                       public static int getCurrentNotificationId Context iContext                NOTIFICATION ID UPPER LIMIT   30000     Arbitrary number               NOTIFICATION ID LOWER LIMIT   0              SharedPreferences sharedPreferences   PreferenceManager getDefaultSharedPreferences iContext           int previousTokenId  sharedPreferences getInt  currentNotificationTokenId   0            int currentTokenId  previousTokenId 1           SharedPreferences Editor editor  sharedPreferences edit             if currentTokenId lt NOTIFICATION ID UPPER LIMIT                 editor putInt  currentNotificationTokenId   currentTokenId                 else                If reaches the limit reset to lower limit               editor putInt  currentNotificationTokenId   NOTIFICATION ID LOWER LIMIT                      editor commit             return currentTokenId

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Simple notification id needs to be changable   Just create random number for notification id       Random random   new Random        int m   random nextInt 9999 - 1000    1000    or you can use this method for creating random number as told by tieorange  this will never get repeated        int m    int    new Date   getTime     1000L    Integer MAX VALUE     and replace this line to add parameter for notification id as to generate random number      notificationManager notify m  notification

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just replace your line with this    notificationManager notify Unique Integer Number  notification     hope it will help you

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notificationManager notify 0  notification     Put this code instead of 0  new Random   nextInt      Like below it works for me  notificationManager notify new Random   nextInt    notification

[android] How to display multiple notifications in android

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