how to make notifications in android

## Main Activity class ## 

import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void createNotification(View view)
    {
        Intent i= new Intent(this,notificationreceiveractivity.class);
        PendingIntent pi=PendingIntent.getActivity(this, 0,i, 0);
        Notification not=new Notification.Builder(this)
        .setContentTitle("New mail from " + "test@gmail.com")
        .setContentText("Subject").setSmallIcon(R.drawable.ic_launcher)
        .setContentIntent(pi)
        .addAction(R.drawable.ic_launcher,"Call",pi)
        .addAction(R.drawable.ic_launcher,"More",pi)
        .addAction(R.drawable.ic_launcher,"And more",pi).build();
       
        NotificationManager nm=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);
        not.flags|=Notification.FLAG_AUTO_CANCEL;
        nm.notify(0,not);
       
      }
 
}

 ## Notification Receive Activity class ## 

import android.app.Activity;
import android.os.Bundle;

public class notificationreceiveractivity extends Activity{

@Override
protected void onCreate(Bundle savedInstanceState)
{
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.result);
}

}

## activity_main.xml ##

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="createNotification"
        android:text="Create Notification" >
    </Button>

</RelativeLayout>

## notification_message.xml ##

<?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" >
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="This is the result activity opened from the notification" >
    </TextView>
   

</RelativeLayout>

## manifest file ##

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

    package="com.example.notificationexamples"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="16"

        android:targetSdkVersion="15" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".MainActivity"

            android:label="@string/title_activity_main" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

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

            </intent-filter>

        </activity>

        <activity android:name=".notificationreceiveractivity">  

        </activity>

    </application>

</manifest>