Notification in android

      

A notification is a message you can display to the user outside of your application's normal UI. For details click here

Follow the bellow steps to create notification in android .

Step 1: Create Project 

          a) Open Android Studio

          b) Go to File >New> New Project  > Project Name  > Next > Next > Next > Finish 

  

Step 2: Layout Design 

             open activity_main.xml file and add the bellow code 

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

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

    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">

       <Button

           android:id="@+id/btnNoti"

           android:layout_width="wrap_content"

           android:layout_height="wrap_content"

           android:text="Send Notification"/>

</RelativeLayout>

Step 3:Create a class "MainActivity.java" which extends Activity class and add  the bellow code.

      

           import android.app.Activity;

import android.app.Notification;

import android.app.NotificationManager;

import android.app.PendingIntent;

import android.content.Context;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Color;

import android.os.Build;

import android.os.Bundle;

import android.support.v4.app.NotificationCompat;

import android.support.v4.app.TaskStackBuilder;

import android.view.View;

import android.widget.Button;

public class MainActivity extends Activity {

    private final static String TAG = MainActivity.class.getSimpleName();

    Button btnNoti;

    Context context;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        context=this;

        btnNoti=(Button)findViewById(R.id.btnNoti);

        // set Button onClickLister

        btnNoti.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

              // to get notification manager object from system using   

              // getSystemService() method.

                NotificationManager notificationManager = (NotificationManager)

                        getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);

                NotificationCompat.Builder mBuilder =

                        new NotificationCompat.Builder(context);

                Bitmap icon1 = BitmapFactory.decodeResource(getResources(),

                        R.mipmap.ic_launcher);

                mBuilder.setAutoCancel(true);

                mBuilder.setContentTitle("Apna Android");

                mBuilder.setContentText("Notification Example");

                if (android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {

                    mBuilder.setSmallIcon(R.mipmap.ic_launcher);

                }

                else{

                    mBuilder.setSmallIcon(R.mipmap.ic_launcher);

                    mBuilder.setColor(Color.parseColor("#0286C9"));

                    Bitmap notificationLargeIconBitmap = BitmapFactory.decodeResource(context.getResources(),

                            R.mipmap.ic_launcher);

                    mBuilder.setLargeIcon(notificationLargeIconBitmap);

                }

                mBuilder.setVisibility(Notification.PRIORITY_MAX);

                mBuilder.setPriority(Notification.PRIORITY_HIGH);

                Intent resultIntent = new Intent(context, MainActivity.class);

                TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);

                stackBuilder.addParentStack(MainActivity.class);

                stackBuilder.addNextIntent(resultIntent);

                PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,

                        PendingIntent.FLAG_UPDATE_CURRENT);

                mBuilder.setContentIntent(resultPendingIntent);

                notificationManager.notify((int) System.currentTimeMillis(), mBuilder.build());

            }

        });

    }

}

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