Android Notification Bar

Jul 25, 2015 By: Dr. Droid Android Notification Bar Comments: 0

A notification is a message you can display to the user outside of your application’s normal UI. When you tell the system to issue a notification, it first appears as an icon in the notification area. To see the details of the notification, the user opens the notification drawer. Both the notification area and the notification drawer are system-controlled areas that the user can view at any time.

Notifications are used to alert users on some events that requires their attention. Notifications alert the users through various forms:

Display a status bar icon
Flash the LED
Vibrate
Ringtones

Status bar notifications indicates some ongoing background services such as downloading or playing music or displays an alert/information.To see the notification user needs to open the notification drawer. Notifications are handled by Notification Manger in Android. Notification Manager is a system service used to manage notifications.

To create a status bar notification we need to use two classes, NotificationManager, Notification.

The NotificationManager is a system Service used to manage Notification. Get a reference to it using the getSystemService() method. The syntax is given below –

NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

1	NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

Using the Notification Manager you can trigger new notifications, modify existing ones, or cancel that are no longer required.

Create and Send Notifications

You have simple way to create a notification. Follow the following steps in your application to create a notification −

1 – Create Notification Builder

As a first step is to create a notification builder using NotificationCompat.Builder.build(). You will use Notification Builder to set various Notification properties like its small and large icons, title, priority etc.

NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
				this);

1 2	NotificationCompat.Builder mBuilder = new NotificationCompat.Builder( this);

2 – Setting Notification Properties

Once you have Builder object, you can set its Notification properties using Builder object as per your requirement. But this is mandatory to set at least following −

A small icon, set by setSmallIcon()
A title, set by setContentTitle()
Detail text, set by setContentText()

mBuilder.setSmallIcon(R.drawable.app_icon_small);
mBuilder.setContentTitle("New Message");
mBuilder.setContentText("You've received new message from Androhub.");

mBuilder.setSmallIcon(R.drawable.app_icon_small);

mBuilder.setContentTitle("New Message");

mBuilder.setContentText("You've received new message from Androhub.");

3 – Attach Actions

This is an optional part and required if you want to attach an action with the notification. An action allows users to go directly from the notification to an Activity in your application, where they can look at one or more events or do further work.

The action is defined by a PendingIntent containing an Intent that starts an Activity in your application. To associate the PendingIntent with a gesture, call the appropriate method ofNotificationCompat.Builder. For example, if you want to start Activity when the user clicks the notification text in the notification drawer, you add the PendingIntent by calling setContentIntent().

A PendingIntent object helps you to perform an action on your applications behalf, often at a later time, without caring of whether or not your application is running.

We take help of stack builder object which 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.

Intent resultIntent = new Intent(MainActivity.this,
				NotificationActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(NotificationActivity.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);

Intent resultIntent = new Intent(MainActivity.this,

NotificationActivity.class);

TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);

stackBuilder.addParentStack(NotificationActivity.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);

4 – Issue the notification

Finally, you pass the Notification object to the system by calling NotificationManager.notify() to send your notification. Make sure you call NotificationCompat.Builder.build() method on builder object before notifying it. This method combines all of the options that have been set and return a new Notification object.

NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    
// notificationID allows you to update the notification later on.
mNotificationManager.notify(notificationID, mBuilder.build());

NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

// notificationID allows you to update the notification later on.

mNotificationManager.notify(notificationID, mBuilder.build());

The NotificationCompat.Builder Class

The NotificationCompat.Builder class allows easier control over all the flags, as well as help constructing the typical notification layouts. Following are few important and most frequently used methods available as a part of NotificationCompat.Builder class.

Method	Description
Notification build()	Combine all of the options that have been set and return a new Notification object.
NotificationCompat.Builder setAutoCancel (boolean autoCancel)	Setting this flag will make it so the notification is automatically canceled when the user clicks it in the panel.
NotificationCompat.Builder setContent (RemoteViews views)	Supply a custom RemoteViews to use instead of the standard one.
NotificationCompat.Builder setContentInfo (CharSequence info)	Set the large text at the right-hand side of the notification.
NotificationCompat.Builder setContentIntent (PendingIntent intent)	Supply a PendingIntent to send when the notification is clicked.
NotificationCompat.Builder setContentText (CharSequence text)	Set the text (second row) of the notification, in a standard notification.
NotificationCompat.Builder setContentTitle (CharSequence title)	Set the text (first row) of the notification, in a standard notification.
NotificationCompat.Builder setDefaults (int defaults)	Set the default notification options that will be used.
NotificationCompat.Builder setLargeIcon (Bitmap icon)	Set the large icon that is shown in the ticker and notification.
NotificationCompat.Builder setNumber (int number)	Set the large number at the right-hand side of the notification.
NotificationCompat.Builder setOngoing (boolean ongoing)	Set whether this is an ongoing notification.
NotificationCompat.Builder setSmallIcon (int icon)	Set the small icon to use in the notification layouts.
NotificationCompat.Builder setStyle (NotificationCompat.Style style)	Add a rich notification style to be applied at build time.
NotificationCompat.Builder setTicker (CharSequence tickerText)	Set the text that is displayed in the status bar when the notification first arrives.
NotificationCompat.Builder setVibrate (long[] pattern)	Set the vibration pattern to use.
NotificationCompat.Builder setWhen (long when)	Set the time that the event occurred. Notifications in the panel are sorted by this time.

Example

In this tutorial, we are going to learn how to create Single Line Notification and Multi Line Notification in Notification Bar.

Video Demo

1. Create a new project in Eclipse by navigating to File ⇒ New Android ⇒ Application Project and fill required details. By default my activity is MainActivity.java.

2. Open res ⇒ values ⇒ strings.xml and add below string values. This are some strings that i am going to use in this tutorial.

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">NotificationBar Demo</string>
    <string name="hello_world">Hello world!</string>
    <string name="action_settings">Settings</string>
    <string name="single_line">Single Line Notification</string>
    <string name="multi_line">Multi Line Notification</string>
    <string name="start">Start Notification</string>
    <string name="stop">Stop Notification</string>
    <string name="update">Update Notification</string>

</resources>

<?xml version="1.0" encoding="utf-8"?>

<string name="app_name">NotificationBar Demo</string>

<string name="hello_world">Hello world!</string>

<string name="action_settings">Settings</string>

<string name="single_line">Single Line Notification</string>

<string name="multi_line">Multi Line Notification</string>

<string name="start">Start Notification</string>

<string name="stop">Stop Notification</string>

<string name="update">Update Notification</string>

</resources>

3. Open your AndroidManifest.xml and add the following permission Vibrate permission to make vibrate device when notification occurs .

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.notification_bar"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="22" />
    <!-- Permission required to vibrate -->
    <uses-permission android:name="android.permission.VIBRATE" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.notification_bar.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <!-- Notification activity with back navigate task to MainActivity -->
        <activity
            android:name=".NotificationActivity"
            android:label="Details of Notification"
            android:parentActivityName=".MainActivity" >
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value=".MainActivity" />
        </activity>
    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.notification_bar"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="22" />

<uses-permission android:name="android.permission.VIBRATE" />

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name="com.notification_bar.MainActivity"

android:label="@string/app_name" >

<intent-filter>

</intent-filter>

</activity>

<activity

android:name=".NotificationActivity"

android:label="Details of Notification"

android:parentActivityName=".MainActivity" >

<meta-data

android:name="android.support.PARENT_ACTIVITY"

android:value=".MainActivity" />

</activity>

</application>

</manifest>

4. Now create a xml layout naming activity_main.xml and add the following views. In this layout i had taken some buttons for both single and multi line notification separately.

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:fillViewport="true" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="5dp" >

        <!-- Single Line Notification Views -->

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="15dp"
            android:text="@string/single_line"
            android:textColor="#0587d9"
            android:textSize="20sp"
            android:textStyle="bold" />

        <Button
            android:id="@+id/start_notificationone"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/start" />

        <Button
            android:id="@+id/stop_notificationone"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/stop" />

        <Button
            android:id="@+id/update_notificationone"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/update" />

        <!-- Multi Line Notification Views -->

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="15dp"
            android:text="@string/multi_line"
            android:textColor="#0587d9"
            android:textSize="20sp"
            android:textStyle="bold" />

        <Button
            android:id="@+id/start_notificationtwo"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/start" />

        <Button
            android:id="@+id/stop_notificationtwo"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/stop" />

        <Button
            android:id="@+id/update_notificationtwo"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/update" />
    </LinearLayout>

</ScrollView>

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:fillViewport="true" >

<LinearLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:orientation="vertical"

android:padding="5dp" >

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:gravity="center"

android:padding="15dp"

android:text="@string/single_line"

android:textColor="#0587d9"

android:textSize="20sp"

android:textStyle="bold" />

<Button

android:id="@+id/start_notificationone"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/start" />

<Button

android:id="@+id/stop_notificationone"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/stop" />

<Button

android:id="@+id/update_notificationone"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/update" />

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:gravity="center"

android:padding="15dp"

android:text="@string/multi_line"

android:textColor="#0587d9"

android:textSize="20sp"

android:textStyle="bold" />

<Button

android:id="@+id/start_notificationtwo"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/start" />

<Button

android:id="@+id/stop_notificationtwo"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/stop" />

<Button

android:id="@+id/update_notificationtwo"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/update" />

</LinearLayout>

</ScrollView>

5. After creating activity_main.xml create a new xml layout naming notification_activity.xml for pending intent to show notification data in new activity.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="center" >

    <TextView
        android:id="@+id/show_notificationmessage"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="5dp"
        android:textColor="#000000"
        android:textSize="20sp" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:gravity="center" >

<TextView

android:id="@+id/show_notificationmessage"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:gravity="center"

android:padding="5dp"

android:textColor="#000000"

android:textSize="20sp" />

</LinearLayout>

6. Now, for creating Multi line notification we have to add the inbox style of notification. For this NotificationCompat.InboxStyle help us to achieve this. In this i had added 6 lines and finally add the inboxstyle to notification builder.

NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();

		String[] events = new String[6];// No of lines to show

		// Loop to add 6 items to array
		for (int i = 0; i < events.length; i++)
			events[i] = new String("This is " + i + " line...");

		// Sets a title for the Inbox style big view
		inboxStyle.setBigContentTitle("Big Title Details:");
		// Moves events into the big view
		for (int i = 0; i < events.length; i++) {
			inboxStyle.addLine(events[i]);
		}
		mBuilder.setStyle(inboxStyle);

NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();

String[] events = new String[6];// No of lines to show

// Loop to add 6 items to array

for (int i = 0; i < events.length; i++)

events[i] = new String("This is " + i + " line...");

// Sets a title for the Inbox style big view

inboxStyle.setBigContentTitle("Big Title Details:");

// Moves events into the big view

for (int i = 0; i < events.length; i++) {

inboxStyle.addLine(events[i]);

}

mBuilder.setStyle(inboxStyle);

7. Open your MainActivity.java and add the following code. I am using two different NotificationId for both Single and MultiLine notification. We will use this ids to start notification, update notification and stop notification. I am also setting a long[] pattern for vibration and also alarm sound for notification.

When user clicks over notification a new activity will open and display a message with current notificationId for this i had put intent values to next intent.

package com.notification_bar;

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.TaskStackBuilder;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.app.NotificationCompat;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends AppCompatActivity implements OnClickListener {
	private static Button start, stop, update, start_two, stop_two, update_two;

	private NotificationManager mNotificationManager;// Notification Manager

	// Notification id for both Notifications
	private final int notificationID_SingleLine = 111;
	private final int notificationID_MultiLine = 222;
	// No. of messages count for both type of notifications
	private int numMessages_SingleLine = 0;
	private int numMessages_MultiLine = 0;

	private static Uri alarmSound;// Alarm sound uri

	private final long[] pattern = { 100, 300, 300, 300 };// Vibrate pattern in
															// long array

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		// Find all views id
		start = (Button) findViewById(R.id.start_notificationone);
		stop = (Button) findViewById(R.id.stop_notificationone);
		update = (Button) findViewById(R.id.update_notificationone);
		start_two = (Button) findViewById(R.id.start_notificationtwo);
		stop_two = (Button) findViewById(R.id.stop_notificationtwo);
		update_two = (Button) findViewById(R.id.update_notificationtwo);

		// Implement click listeners
		start.setOnClickListener(this);
		stop.setOnClickListener(this);
		update.setOnClickListener(this);
		start_two.setOnClickListener(this);
		stop_two.setOnClickListener(this);
		update_two.setOnClickListener(this);

		// Set by default alarm sound
		alarmSound = RingtoneManager
				.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

		// setting notification manager
		mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
	}

	// Call repersentative methods on buttons press
	@Override
	public void onClick(View view) {
		switch (view.getId()) {
		case R.id.start_notificationone:
			displayNotificationSingleLine();
			break;

		case R.id.stop_notificationone:
			cancelNotificationSingleLine();
			break;

		case R.id.update_notificationone:
			updateNotificationSingleLine();
			break;

		case R.id.start_notificationtwo:
			displayNotificationMultiLine();
			break;

		case R.id.stop_notificationtwo:
			cancelNotificationMultiLine();
			break;

		case R.id.update_notificationtwo:
			updateNotificationMultiLine();
			break;

		}

	}

	/** Single Line Notifications Methods **/
	protected void displayNotificationSingleLine() {
		Log.i("Start", "notification");
		/* Invoking the default notification service */
		NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
				MainActivity.this);// Setting builder
		mBuilder.setContentTitle("New Message");// title
		mBuilder.setContentText("You've received new message from Androhub.");// Message
		mBuilder.setTicker("New Message Alert!");// Ticker
		mBuilder.setSmallIcon(R.drawable.app_icon_small);// Small icon
		/* Increase notification number every time a new notification arrives */
		mBuilder.setNumber(++numMessages_SingleLine);

		mBuilder.setSound(alarmSound);// set alarm sound
		mBuilder.setVibrate(pattern);// set vibration
		/* Creates an explicit intent for an Activity in your app */
		Intent resultIntent = new Intent(MainActivity.this,
				NotificationActivity.class);

		resultIntent.putExtra("notificationId", notificationID_SingleLine);// put
																			// notification
																			// id
																			// into
																			// intent
		resultIntent.putExtra("message", "https://androhub.com");//Your message to show in next activity

		// Task builder to maintain task for pending intent
		TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
		stackBuilder.addParentStack(NotificationActivity.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);// Set flag to update current
		mBuilder.setContentIntent(resultPendingIntent);// set content intent

		/* notificationID allows you to update the notification later on. */
		mNotificationManager
				.notify(notificationID_SingleLine, mBuilder.build());
	}

	protected void cancelNotificationSingleLine() {
		Log.i("Cancel", "notification");
		mNotificationManager.cancel(notificationID_SingleLine);// Cancel the
																// notification
																// id
																// notification
																// if it is
																// showing
	}

	protected void updateNotificationSingleLine() {
		Log.i("Update", "notification");
		/* Invoking the default notification service */
		NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
				this);
		mBuilder.setContentTitle("Updated Message");
		mBuilder.setContentText("You've got updated message from Androhub.");
		mBuilder.setTicker("Updated Message Alert!");
		mBuilder.setSmallIcon(R.drawable.app_icon_small);
		mBuilder.setSound(alarmSound);
		mBuilder.setVibrate(pattern);
		/* Increase notification number every time a new notification arrives */
		mBuilder.setNumber(++numMessages_SingleLine); /*
													 * Creates an explicit
													 * intent for an Activity in
													 * your app
													 */
		Intent resultIntent = new Intent(this, NotificationActivity.class);
		resultIntent.putExtra("notificationId", notificationID_SingleLine);
		resultIntent.putExtra("message", "https://androhub.com");
		TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
		stackBuilder.addParentStack(NotificationActivity.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);

		/* Update the existing notification using same notification ID */
		mNotificationManager
				.notify(notificationID_SingleLine, mBuilder.build());
	}

	/** ---------------------------------------------------------------------- **/

	/** Multi Line Notifications Methods **/
	protected void displayNotificationMultiLine() {
		Log.i("Start", "notification");
		/* Invoking the default notification service */
		NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
				this);
		mBuilder.setContentTitle("New Message");
		mBuilder.setContentText("You've received new message from Androhub.");
		mBuilder.setTicker("New Multi Message Alert!");
		mBuilder.setSmallIcon(R.drawable.app_icon_small);

		/* Increase notification number every time a new notification arrives */
		mBuilder.setNumber(++numMessages_MultiLine);
		mBuilder.setSound(alarmSound);
		mBuilder.setVibrate(pattern);
		/* Add Big View Specific Configuration */
		NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();

		String[] events = new String[6];// No of lines to show

		// Loop to add 6 items to array
		for (int i = 0; i < events.length; i++)
			events[i] = new String("This is " + i + " line...");

		// Sets a title for the Inbox style big view
		inboxStyle.setBigContentTitle("Big Title Details:");
		// Moves events into the big view
		for (int i = 0; i < events.length; i++) {
			inboxStyle.addLine(events[i]);
		}
		mBuilder.setStyle(inboxStyle);
		/* Creates an explicit intent for an Activity in your app */
		Intent resultIntent = new Intent(this, NotificationActivity.class);
		resultIntent.putExtra("notificationId", notificationID_MultiLine);
		resultIntent.putExtra("message", "https://androhub.com");
		TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
		stackBuilder.addParentStack(NotificationActivity.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);
		mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
		/* notificationID allows you to update the notification later on. */
		mNotificationManager.notify(notificationID_MultiLine, mBuilder.build());

	}

	protected void cancelNotificationMultiLine() {
		Log.i("Cancel", "notification");
		mNotificationManager.cancel(notificationID_MultiLine);
	}

	protected void updateNotificationMultiLine() {
		Log.i("Start", "notification");
		/* Invoking the default notification service */
		NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
				this);
		mBuilder.setContentTitle("New Message");
		mBuilder.setContentText("You've got updated message from Androhub.");
		mBuilder.setTicker("New Multi Message Alert!");
		mBuilder.setSmallIcon(R.drawable.app_icon_small);
		/* Increase notification number every time a new notification arrives */
		mBuilder.setNumber(++numMessages_MultiLine);
		mBuilder.setSound(alarmSound);
		mBuilder.setVibrate(pattern);
		/* Add Big View Specific Configuration */
		NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
		String[] events = new String[6];
		// Loop to add 6 items to array
		for (int i = 0; i < events.length; i++)
			events[i] = new String("This is update of " + i + " line...");
		// Sets a title for the Inbox style big view
		inboxStyle.setBigContentTitle("Big Title Details");
		// Moves events into the big view
		for (int i = 0; i < events.length; i++) {
			inboxStyle.addLine(events[i]);
		}
		mBuilder.setStyle(inboxStyle);
		/* Creates an explicit intent for an Activity in your app */
		Intent resultIntent = new Intent(this, NotificationActivity.class);
		resultIntent.putExtra("notificationId", notificationID_MultiLine);
		resultIntent.putExtra("message", "https://androhub.com");
		TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
		stackBuilder.addParentStack(NotificationActivity.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);
		mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
		/* notificationID allows you to update the notification later on. */
		mNotificationManager.notify(notificationID_MultiLine, mBuilder.build());

	}
	/** ---------------------------------------------------------------------- **/
}

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package com.notification_bar;

import android.app.NotificationManager;

import android.app.PendingIntent;

import android.content.Context;

import android.content.Intent;

import android.media.RingtoneManager;

import android.net.Uri;

import android.os.Bundle;

import android.support.v4.app.TaskStackBuilder;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.app.NotificationCompat;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class MainActivity extends AppCompatActivity implements OnClickListener {

private static Button start, stop, update, start_two, stop_two, update_two;

private NotificationManager mNotificationManager;// Notification Manager

// Notification id for both Notifications

private final int notificationID_SingleLine = 111;

private final int notificationID_MultiLine = 222;

// No. of messages count for both type of notifications

private int numMessages_SingleLine = 0;

private int numMessages_MultiLine = 0;

private static Uri alarmSound;// Alarm sound uri

private final long[] pattern = { 100, 300, 300, 300 };// Vibrate pattern in

// long array

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// Find all views id

start = (Button) findViewById(R.id.start_notificationone);

stop = (Button) findViewById(R.id.stop_notificationone);

update = (Button) findViewById(R.id.update_notificationone);

start_two = (Button) findViewById(R.id.start_notificationtwo);

stop_two = (Button) findViewById(R.id.stop_notificationtwo);

update_two = (Button) findViewById(R.id.update_notificationtwo);

// Implement click listeners

start.setOnClickListener(this);

stop.setOnClickListener(this);

update.setOnClickListener(this);

start_two.setOnClickListener(this);

stop_two.setOnClickListener(this);

update_two.setOnClickListener(this);

// Set by default alarm sound

alarmSound = RingtoneManager

.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

// setting notification manager

mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

}

// Call repersentative methods on buttons press

@Override

public void onClick(View view) {

switch (view.getId()) {

case R.id.start_notificationone:

displayNotificationSingleLine();

break;

case R.id.stop_notificationone:

cancelNotificationSingleLine();

break;

case R.id.update_notificationone:

updateNotificationSingleLine();

break;

case R.id.start_notificationtwo:

displayNotificationMultiLine();

break;

case R.id.stop_notificationtwo:

cancelNotificationMultiLine();

break;

case R.id.update_notificationtwo:

updateNotificationMultiLine();

break;

}

/** Single Line Notifications Methods **/

protected void displayNotificationSingleLine() {

Log.i("Start", "notification");

/* Invoking the default notification service */

NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(

MainActivity.this);// Setting builder

mBuilder.setContentTitle("New Message");// title

mBuilder.setContentText("You've received new message from Androhub.");// Message

mBuilder.setTicker("New Message Alert!");// Ticker

mBuilder.setSmallIcon(R.drawable.app_icon_small);// Small icon

/* Increase notification number every time a new notification arrives */

mBuilder.setNumber(++numMessages_SingleLine);

mBuilder.setSound(alarmSound);// set alarm sound

mBuilder.setVibrate(pattern);// set vibration

/* Creates an explicit intent for an Activity in your app */

Intent resultIntent = new Intent(MainActivity.this,

NotificationActivity.class);

resultIntent.putExtra("notificationId", notificationID_SingleLine);// put

// notification

// id

// into

// intent

resultIntent.putExtra("message", "https://androhub.com");//Your message to show in next activity

// Task builder to maintain task for pending intent

TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);

stackBuilder.addParentStack(NotificationActivity.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);// Set flag to update current

mBuilder.setContentIntent(resultPendingIntent);// set content intent

/* notificationID allows you to update the notification later on. */

mNotificationManager

.notify(notificationID_SingleLine, mBuilder.build());

}

protected void cancelNotificationSingleLine() {

Log.i("Cancel", "notification");

mNotificationManager.cancel(notificationID_SingleLine);// Cancel the

// notification

// id

// notification

// if it is

// showing

}

protected void updateNotificationSingleLine() {

Log.i("Update", "notification");

/* Invoking the default notification service */

NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(

this);

mBuilder.setContentTitle("Updated Message");

mBuilder.setContentText("You've got updated message from Androhub.");

mBuilder.setTicker("Updated Message Alert!");

mBuilder.setSmallIcon(R.drawable.app_icon_small);

mBuilder.setSound(alarmSound);

mBuilder.setVibrate(pattern);

/* Increase notification number every time a new notification arrives */

mBuilder.setNumber(++numMessages_SingleLine); /*

* Creates an explicit

* intent for an Activity in

* your app

Intent resultIntent = new Intent(this, NotificationActivity.class);

resultIntent.putExtra("notificationId", notificationID_SingleLine);

resultIntent.putExtra("message", "https://androhub.com");

TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);

stackBuilder.addParentStack(NotificationActivity.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);

/* Update the existing notification using same notification ID */

mNotificationManager

.notify(notificationID_SingleLine, mBuilder.build());

}

/** ---------------------------------------------------------------------- **/

/** Multi Line Notifications Methods **/

protected void displayNotificationMultiLine() {

Log.i("Start", "notification");

/* Invoking the default notification service */

NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(

this);

mBuilder.setContentTitle("New Message");

mBuilder.setContentText("You've received new message from Androhub.");

mBuilder.setTicker("New Multi Message Alert!");

mBuilder.setSmallIcon(R.drawable.app_icon_small);

/* Increase notification number every time a new notification arrives */

mBuilder.setNumber(++numMessages_MultiLine);

mBuilder.setSound(alarmSound);

mBuilder.setVibrate(pattern);

/* Add Big View Specific Configuration */

NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();

String[] events = new String[6];// No of lines to show

// Loop to add 6 items to array

for (int i = 0; i < events.length; i++)

events[i] = new String("This is " + i + " line...");

// Sets a title for the Inbox style big view

inboxStyle.setBigContentTitle("Big Title Details:");

// Moves events into the big view

for (int i = 0; i < events.length; i++) {

inboxStyle.addLine(events[i]);

}

mBuilder.setStyle(inboxStyle);

/* Creates an explicit intent for an Activity in your app */

Intent resultIntent = new Intent(this, NotificationActivity.class);

resultIntent.putExtra("notificationId", notificationID_MultiLine);

resultIntent.putExtra("message", "https://androhub.com");

TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);

stackBuilder.addParentStack(NotificationActivity.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);

mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

/* notificationID allows you to update the notification later on. */

mNotificationManager.notify(notificationID_MultiLine, mBuilder.build());

}

protected void cancelNotificationMultiLine() {

Log.i("Cancel", "notification");

mNotificationManager.cancel(notificationID_MultiLine);

}

protected void updateNotificationMultiLine() {

Log.i("Start", "notification");

/* Invoking the default notification service */

NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(

this);

mBuilder.setContentTitle("New Message");

mBuilder.setContentText("You've got updated message from Androhub.");

mBuilder.setTicker("New Multi Message Alert!");

mBuilder.setSmallIcon(R.drawable.app_icon_small);

/* Increase notification number every time a new notification arrives */

mBuilder.setNumber(++numMessages_MultiLine);

mBuilder.setSound(alarmSound);

mBuilder.setVibrate(pattern);

/* Add Big View Specific Configuration */

NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();

String[] events = new String[6];

// Loop to add 6 items to array

for (int i = 0; i < events.length; i++)

events[i] = new String("This is update of " + i + " line...");

// Sets a title for the Inbox style big view

inboxStyle.setBigContentTitle("Big Title Details");

// Moves events into the big view

for (int i = 0; i < events.length; i++) {

inboxStyle.addLine(events[i]);

}

mBuilder.setStyle(inboxStyle);

/* Creates an explicit intent for an Activity in your app */

Intent resultIntent = new Intent(this, NotificationActivity.class);

resultIntent.putExtra("notificationId", notificationID_MultiLine);

resultIntent.putExtra("message", "https://androhub.com");

TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);

stackBuilder.addParentStack(NotificationActivity.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);

mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

/* notificationID allows you to update the notification later on. */

mNotificationManager.notify(notificationID_MultiLine, mBuilder.build());

}

/** ---------------------------------------------------------------------- **/

}

8. Finally create a new activity naming NotificationActivity.java this activity open when user clicks over notification. In this activity i am getting notificationId and message and displaying it over textview.

package com.notification_bar;

import android.app.NotificationManager;
import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.util.Linkify;
import android.widget.TextView;

public class NotificationActivity extends AppCompatActivity {

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.notification_activity);
		String message = "";
		int id = 0;

		Bundle extras = getIntent().getExtras();// get intent data
		if (extras == null) {
			// If it is null then show error
			message = "error";
		} else {
			// get id and message
			id = extras.getInt("notificationId");
			message = extras.getString("message");
		}
		TextView text = (TextView) findViewById(R.id.show_notificationmessage);

		message = "Notification Id : " + id + "n Message : " + message;// Concat
																		// id
																		// and
																		// message
		text.setText(message);// set text
		Linkify.addLinks(text, Linkify.ALL);// Linkify textview for phone
											// numbers, url ,etc.
		NotificationManager myNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

		// remove the notification with the specific id
		myNotificationManager.cancel(id);

	}
}

package com.notification_bar;

import android.app.NotificationManager;

import android.content.Context;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.text.util.Linkify;

import android.widget.TextView;

public class NotificationActivity extends AppCompatActivity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.notification_activity);

String message = "";

int id = 0;

Bundle extras = getIntent().getExtras();// get intent data

if (extras == null) {

// If it is null then show error

message = "error";

} else {

// get id and message

id = extras.getInt("notificationId");

message = extras.getString("message");

}

TextView text = (TextView) findViewById(R.id.show_notificationmessage);

message = "Notification Id : " + id + "n Message : " + message;// Concat

// id

// and

// message

text.setText(message);// set text

Linkify.addLinks(text, Linkify.ALL);// Linkify textview for phone

// numbers, url ,etc.

NotificationManager myNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

// remove the notification with the specific id

myNotificationManager.cancel(id);

}

9. Now, you are all done, run your app and you will get the output as shown in video.

Thanks.