Android notification example and source code

In this example we have a button and if we click it it will call createNotification function inside MainActivity.java to show a notification. Then, if we click the notification, it brings second activity up.

We have two activity layout, first activity_main.xml :

<?xml version="1.0" encoding="utf-8"?>
<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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.zofiakreasi.andronotify.MainActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:onClick="createNotification"
        android:id="@+id/button"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />
</RelativeLayout>

And this is Java codes for that layout:

package com.zofiakreasi.andronotify;

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.app.NotificationCompat;
import android.view.View;

public class MainActivity extends AppCompatActivity {

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

    public void createNotification(View view){
        Intent intent = new Intent(this, Result.class);
        PendingIntent pIntent = PendingIntent.getActivity(this, (int)System.currentTimeMillis(), intent, 0);
        NotificationCompat.Builder notification = new NotificationCompat.Builder(this);
        notification.setSmallIcon(R.drawable.icon);
        notification.setContentTitle("New notification!");
        notification.setContentText("Congratulation for successfully showing a notification!");
        notification.setContentIntent(pIntent);
        NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        notificationManager.notify(0, notification.build());
    }
}

And here is the second activity called result.xml :

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

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="This is result text."
        android:id="@+id/resultText" />
</LinearLayout>

And finally here is Java codes for that layout:

package com.zofiakreasi.andronotify;

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

public class Result extends Activity{
    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.result);
    }
}

You can see some screenshots I’ve taken: