android notification manager


notification manager


  • Notification manager
It is a class to notify users of event that happen.


  • Setting up notifications

                       

 By using NotificationManager class via getSystemService() method


NotificationManager notificationManager = (NotificationManager) 
getSystemService(NOTIFICATION_SERVICE);

notification manager

  • Public Methods of Notification Manager

public void cancel(int id)

public void cancel(String tag, int id)

public void cancelAll()

public void notify(int id, Notification notification)

public void notify(String tag, int id, Notification notification)
EXAMPLE:
NotificationManager notificationManager = 
  (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

notification.flags |= Notification.FLAG_AUTO_CANCEL;

notificationManager.notify(0, notification);

notification

  • Notification class
A class that represents how a persistent notification is to be presented to
the user


  • Notification Flags
-> FLAG_AUTO_CANCEL

-> FLAG_FOREGROUND_SERVICE

-> FLAG_INSIST

-> FLAG_NO_CLEAR

-> FLAG_ONGOING_EVENT

-> FLAG_ONLY_ALERT_ONCE

-> FLAG_SHOW_LIGHTS

notification builder


  • Notification.Builder


Notification.Builder provides a builder interface to create a Notification object.



Notification note = new Notification.Builder(this)
        .setContentTitle( " New Mail from " + "test@gmail.com")
        .setContentText("Subject")
        .setSmallIcon(R.drawable.icon)
        .setContentIntent(pIntent)
        .addAction(R.drawable.icon, "Call", pIntent).build();

notification builder

  • Commonly used public methods of Notification.Builder

setAutoCancel(boolean autocancel)

setContentTitle(Charsequence title)

setContentText(Charsequence text)

setSmallIcon(int Icon)

setTicker(Charsequence text)

addAction(int icon, Charsequence title, PendingIntent intent)
setContentIntent(Intent)

pending intent


  • Pending intent
Pending intent is an intent which is not called immediately. 

PendingIntent pendintent = PendingIntent.getActivity(this, 0, intent, 0);

It allows the foreign application to use your application's permissions 
to execute a predefined piece of code.

There are three ways to get an instance of Pending Intent:

  • getService(Context context, int requestCode, Intent intent, int flags) 
  • getActivity(Context context, int requestCode, Intent intent, int flags) 
  • getBroadcast(Context context, int requestCode, Intent intent, int flags)

pending intent


  • Pending Intent Flags


The following values are taken as flags in a Pending Intent

  • FLAG_CANCEL_CURRENT 

  • FLAG_NO_CREATE

  • FLAG_ONE_SHOT

  • FLAG_UPDATE_CURRENT

notification Buttons

  • Notifications with Buttons


Android allows a maximum of three buttons to a notification



Notification noti = new Notification.Builder(this)
        .setContentTitle( " New Mail from " + "test@gmail.com")
        .setContentText("Subject")
        .setSmallIcon(R.drawable.icon)
        .setContentIntent(pIntent)
        .addAction(R.drawable.icon, "Call", pIntent)
        .addAction(R.drawable.icon, "Message", pIntent)
        .addAction(R.drawable.icon, "Delete" , pIntent).build();

notification types

  • Types of notifications
There are three types of notifications 

Notification.BigPictureStyle:

    Generates a large format notification including a large image attachment.

Notification notification = new Notification.BigPictureStyle(builder)
               .bigPicture(BitmapFactory.decodeResource(getResources(),
                               R.drawable.sunset)).build();

notification types

  • Notification.BigText
Generates a large-format notification that include a lot of text.


Notification notification = new Notification.BigTextStyle(builder)
               .bigText(msgText).build();

notification Types

  • Notification.InboxStyle
Generates a large-format notification that include a list of (up to 5) strings.


  Notification notification = new Notification.InboxStyle(builder)
               .addLine("First message").addLine("Second message")
               .addLine("Thrid message").addLine("Fourth Message")
               .setSummaryText("+2 more").build();

custom views

  • Using BigContentView
Developer can put their own custom view to a notification.
Uses BigContentView instead of ContentView of Remoteview in a Notification

RemoteViews bpView = new RemoteViews(this.getPackageName(),
                      R.layout.notif_boarding_pass);
bpView.setTextViewText(R.id.origin_text_view, origin);
bpView.setTextViewText(R.id.destination_text_view, destination);
Notification notif = new Notification.Builder(this)
                     .setContentTitle("Boarding pass")
                     .setContentText("Click for more info")
                     .setSmallIcon(R.drawable.ic_launcher).build(); 
notif.flags |= Notification.FLAG_AUTO_CANCEL;
notif.bigContentView = bpView;



Thank you

android notification manager

By Torry Harris Business Solutions

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android notification manager

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