Notification for android

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.In order to see the details, the user opens the notification drawer. Both the notification area and the drawer are system-controlled areas that the user can view at any time more can be found here.

We can update the current notification shown or create a new one . These two things can be achieved very easily.

The NotificationManager require a key for starting, if we use the same key over and over it updates the current notification with the same key.

In the case of using another key for NotificationManager it creates new notification instance. Like the figure.

It also contains additional items. Sound (default or assigned tone),Vibration (control duration and pattern of vibration),Light(color and blinking delay are  controlled ) and Time (display given time) are among it

Creating the object

Notification mNotification = new NotificationCompat.Builder(this)

This code creates the object, Next part is the tittle ticker. Ticker is created using .setTicker("Ticker heading"). Ticker is the heading that displays along with the icon in notification area.




Below is an example method for notification.

public void singleNotification(){
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        PendingIntent pi = PendingIntent.getActivity(this, 0,intent, PendingIntent.FLAG_UPDATE_CURRENT);
        //for vibration
        longs=new long[] { 1000, 1000};
        //for led color
        color=Color.BLUE;
        Uri uri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.InboxStyle inboxStyle =new NotificationCompat.InboxStyle();
        inboxStyle.setBigContentTitle("Logicchip");

        // Moves events into the expanded layout
        arraySingleList=new ArrayList();
        arraySingleList.add("logicchip a");
        arraySingleList.add("logicchip b");
        arraySingleList.add("logicchip c");
        for (int i=arraySingleList.size(); i >0; i--) {
            inboxStyle.addLine(arraySingleList.get(i-1).toString());
        }
        Bitmap largeIcon = BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher);
        Notification mNotification = new NotificationCompat.Builder(this)
                .setTicker("Ticker logicchip")
                .setContentTitle(String.valueOf(keyForSingleNotification)+" Content Tittle Logicchip")
                .setLargeIcon(largeIcon)
                .setContentText("Content Text Logicchips")
                .setContentInfo(String.valueOf(arraySingleList.size()))
                .setSmallIcon(R.mipmap.ic_launcher)//icon
                .setContentIntent(pi)
                .setVibrate(longs)                                          //for vibration set pattern time
                .setNumber(arraySingleList.size()) //showing number
                .setSubText(String.valueOf(arraySingleList.size())+" New updates")//for single line text
                .setLights(color,2000, 2000)//led blinking
                .setSound(uri)//for notification tone
                .setStyle(inboxStyle)//for changing updates
                .setAutoCancel(true)
                .setWhen(System.currentTimeMillis())//showing time
                .build();
        NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        notificationManager.notify(keyForSingleNotification++, mNotification);
    }

The intent is for displaying the result, It can be explained. When we click the notification it opens the activity mentioned in PendingIntent. Each notification can only open one activity.

The next method shows the updating notification.

    public void showNotification() {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        PendingIntent pi = PendingIntent.getActivity(this, 0,intent, PendingIntent.FLAG_UPDATE_CURRENT);
        //for vibration
        longs=new long[] { 1000, 1000};
        //for led color
        color=Color.BLUE;
        Uri uri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.InboxStyle inboxStyle =new NotificationCompat.InboxStyle();
        inboxStyle.setBigContentTitle("Logicchip");

        // Moves events into the expanded layout
        arrayList.add("logicchip "+arrayList.size());
        for (int i=arrayList.size(); i >0; i--) {
            inboxStyle.addLine(arrayList.get(i-1).toString());
        }
        Bitmap largeIcon = BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher);
        Notification mNotification = new NotificationCompat.Builder(this)
                .setTicker("Ticker logicchip")
                .setContentTitle("Content Titile Logicchip")
                .setLargeIcon(largeIcon)
                .setContentText("Content Text Logicchips")
                .setContentInfo(String.valueOf(arrayList.size()))
                .setSmallIcon(R.mipmap.ic_launcher)//icon
                .setContentIntent(pi)
                .setVibrate(longs)                                          //for vibration set pattern time
                .setNumber(arrayList.size()) //showing number
                .setSubText(String.valueOf(arrayList.size())+" New updates")//for single line text
                .setLights(color,2000, 2000)//led blinking
                .setSound(uri)//for notification tone
                .setStyle(inboxStyle)//for changing updates
                .setAutoCancel(true)
                .setWhen(System.currentTimeMillis())//showing time
                .build();
        NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        notificationManager.notify(keyForNotification, mNotification);
    }

you can see by comparing the two methods keyForNotification and keyForSingleNotification++. Where keyForNotification is for updating notifications and keyForSingleNotification++ is for individual notifications.

The full code is displayed below with xml file.

MainActivity.java

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Bundle;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.Snackbar;
import android.support.v4.app.NotificationCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Button;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity implements View.OnClickListener,Runnable {
    private CoordinatorLayout coordinatorLayout;
    private ArrayList arrayList=new ArrayList(),arraySingleList;
    private int keyForNotification=0,keyForSingleNotification=0;
    private long[] longs;
    private int color;
    private Thread thread;
    private Button buttonThread,buttonSingle,buttonMulti;
    private boolean oN=false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        buttonThread=(Button)findViewById(R.id.buttonThread);
        buttonSingle=(Button)findViewById(R.id.buttonSingle);
        buttonMulti=(Button)findViewById(R.id.buttonMulti);
        buttonThread.setOnClickListener(this);
        buttonSingle.setOnClickListener(this);
        buttonMulti.setOnClickListener(this);
    }




    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.buttonThread:

                if(oN){
                    thread=null;
                    oN=false;
                    buttonThread.setText("start");
                }else {
                    thread = new Thread(this);
                    thread.start();
                    oN=true;
                    buttonThread.setText("stop");
                }
                break;
            case R.id.buttonSingle:
                singleNotification();
                break;
            case R.id.buttonMulti:
                showNotification();
                break;
        }

    }


    public void showNotification() {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        PendingIntent pi = PendingIntent.getActivity(this, 0,intent, PendingIntent.FLAG_UPDATE_CURRENT);
        //for vibration
        longs=new long[] { 1000, 1000};
        //for led color
        color=Color.BLUE;
        Uri uri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.InboxStyle inboxStyle =new NotificationCompat.InboxStyle();
        inboxStyle.setBigContentTitle("Logicchip");

        // Moves events into the expanded layout
        arrayList.add("logicchip "+arrayList.size());
        for (int i=arrayList.size(); i >0; i--) {
            inboxStyle.addLine(arrayList.get(i-1).toString());
        }
        Bitmap largeIcon = BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher);
        Notification mNotification = new NotificationCompat.Builder(this)
                .setTicker("Ticker logicchip")
                .setContentTitle("Content Titile Logicchip")
                .setLargeIcon(largeIcon)
                .setContentText("Content Text Logicchips")
                .setContentInfo(String.valueOf(arrayList.size()))
                .setSmallIcon(R.mipmap.ic_launcher)//icon
                .setContentIntent(pi)
                .setVibrate(longs)                                          //for vibration set pattern time
                .setNumber(arrayList.size()) //showing number
                .setSubText(String.valueOf(arrayList.size())+" New updates")//for single line text
                .setLights(color,2000, 2000)//led blinking
                .setSound(uri)//for notification tone
                .setStyle(inboxStyle)//for changing updates
                .setAutoCancel(true)
                .setWhen(System.currentTimeMillis())//showing time
                .build();
        NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        notificationManager.notify(keyForNotification, mNotification);
    }

    public void singleNotification(){
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        PendingIntent pi = PendingIntent.getActivity(this, 0,intent, PendingIntent.FLAG_UPDATE_CURRENT);
        //for vibration
        longs=new long[] { 1000, 1000};
        //for led color
        color=Color.BLUE;
        Uri uri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.InboxStyle inboxStyle =new NotificationCompat.InboxStyle();
        inboxStyle.setBigContentTitle("Logicchip");

        // Moves events into the expanded layout
        arraySingleList=new ArrayList();
        arraySingleList.add("logicchip a");
        arraySingleList.add("logicchip b");
        arraySingleList.add("logicchip c");
        for (int i=arraySingleList.size(); i >0; i--) {
            inboxStyle.addLine(arraySingleList.get(i-1).toString());
        }
        Bitmap largeIcon = BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher);
        Notification mNotification = new NotificationCompat.Builder(this)
                .setTicker("Ticker logicchip")
                .setContentTitle(String.valueOf(keyForSingleNotification)+" Content Tittle Logicchip")
                .setLargeIcon(largeIcon)
                .setContentText("Content Text Logicchips")
                .setContentInfo(String.valueOf(arraySingleList.size()))
                .setSmallIcon(R.mipmap.ic_launcher)//icon
                .setContentIntent(pi)
                .setVibrate(longs)                                          //for vibration set pattern time
                .setNumber(arraySingleList.size()) //showing number
                .setSubText(String.valueOf(arraySingleList.size())+" New updates")//for single line text
                .setLights(color,2000, 2000)//led blinking
                .setSound(uri)//for notification tone
                .setStyle(inboxStyle)//for changing updates
                .setAutoCancel(true)
                .setWhen(System.currentTimeMillis())//showing time
                .build();
        NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        notificationManager.notify(keyForSingleNotification++, mNotification);
    }


    @Override
    public void run() {
        Thread thisThread = Thread.currentThread();
        while (thread == thisThread) {
                try {
                    Thread.sleep(3000);
                    showNotification();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/content_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="logicchip.blog_6_notifiaction.MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:gravity="center"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="start"
            android:id="@+id/buttonThread" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Single"
            android:id="@+id/buttonSingle" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Multi"
            android:id="@+id/buttonMulti" />
    </LinearLayout>
</RelativeLayout>

You must add permission for VIBRATION. Add this to the AndroidManifest.xml file.

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

Don’t hesitate to comment below if you have any questions or doubts.