How to Push Notification in Android?
Last Updated :
23 Jul, 2025
A notification is a message that appears outside of our Application's normal UI. A notification can appear in different formats and locations such as an icon in the status bar, a more detailed entry in the notification drawer, etc. Through the notification, we can notify users about any important updates, events of our application. By clicking the notification user can open any activity of our application or can do some action like opening any webpage etc.
How Does Notification Look?
Let's see the basic design of a notification template that appears in the navigation drawer.
Part of a Notification | Method for defining contents | Type of argument needs to pass into the method |
|---|
| Small Icon | setSmallIcon() | Drawable file |
| App Name | By default, App Name is provided by the System and we can't override it. | |
| Timestamp | By default, timeStamp is provided by the System but we can override it by setWhen() method. | Long (in milliseconds) |
| Title | setContentTitle() | String |
| Text | setContentText() | String |
| Large Icon | setLargeIcon() | Bitmap image |
Understand Some Important Concepts of Push a Notification
We shall discuss all the concepts mentioned below step by step,
- Creating a basic notification
- Creating notification channel
- Adding large icon
- Making notification expandable
- Making notification clickable
- Adding an action button to our notification
1. Creating a basic notification
Tocreate a basic notification at first we need to build a notification. Now to build notification, we must use NotificationCompat.Builder() class where we need to pass a context of activity and a channel id as an argument while making an instance of the class. Please note here we are not using Notification.Builder(). NotificationCompat gives compatibility to upper versions (Android 8.0 and above) with lower versions (below Android 8.0).
Java
// Build the notification
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.gfg_logo) // Notification icon
.setContentTitle("Hello") // Title displayed in the notification
.setContentText("Welcome to GeeksforGeeks!!") // Text displayed in the notification
.setPriority(NotificationCompat.PRIORITY_HIGH); // Notification priority for better visibility
// Build the notification
val builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.gfg_logo) // Notification icon
.setContentTitle("Hello") // Title displayed in the notification
.setContentText("Welcome to GeeksforGeeks!!") // Text displayed in the notification
.setPriority(NotificationCompat.PRIORITY_HIGH) // Notification priority for better visibility
Please note, here we need to set the priority of the notification accordingly by the setPriority() method.
Now to deliver the notification we need an object of NotificationManagerCompat class and then we notify it.
Java
// Display the notification
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
notificationManager.notify(NOTIFICATION_ID, builder.build());
// Display the notification
with(NotificationManagerCompat.from(this)) {
notify(NOTIFICATION_ID, builder.build())
}
Please note that, in this method, we can deliver notification only in the android versions below 8.0 but in the android versions 8.0 and upper, no notification will appear by only this block of code.
2. Creating a notification channel
Now to deliver notifications on android version 8.0 and above versions, we need to create a notification channel. This Notification Channel concept comes from android 8.0. Here every application may have multiple channels for different types of notifications and each channel has some type of notification. Before you can deliver the notification on Android 8.0 and above versions, you must register your app's notification channel with the system by passing an instance of NotificationChannel to createNotificationChannel().
Java
/**
* Create a notification channel for devices running Android 8.0 or higher.
* A channel groups notifications with similar behavior.
*/
private void creatingNotificationChannel() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel notificationChannel = new NotificationChannel(
channelId,
description,
NotificationManager.IMPORTANCE_HIGH
);
notificationChannel.enableLights(true); // Turn on notification light
notificationChannel.setLightColor(Color.GREEN);
notificationChannel.enableVibration(true); // Allow vibration for notifications
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.createNotificationChannel(notificationChannel);
}
}
/**
* Create a notification channel for devices running Android 8.0 or higher.
* A channel groups notifications with similar behavior.
*/
private fun creatingNotificationChannel() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
val notificationChannel = NotificationChannel(
channelId,
description,
NotificationManager.IMPORTANCE_HIGH
).apply {
enableLights(true) // Turn on notification light
lightColor = Color.GREEN
enableVibration(true) // Allow vibration for notifications
}
val notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
notificationManager.createNotificationChannel(notificationChannel)
}
}
Please note that here we must provide a unique CHANNEL_ID for each channel and also we must give a CHANNEL_NAME and CHANNEL_DESCRIPTION, and channel importance level.
3. Adding a large icon
To set a large icon we use the setLargeIcon() method which is applied to the instance of the NotificationCompat.Builder() class. In this method, we need to pass a Icon or Bitmap form of an image. Now to convert an image file (e.g. jpg, jpeg, png, etc.) of the drawable folder into a Bitmap or an Icon, we use the following code in Kotlin
Java
// Converting resource file to icon
Icon icon = Icon.createWithResource(this, R.drawable.gfg_logo);
// Converting resource file to bitmap image
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.gfg_logo);
// Build the notification
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.gfg_logo)
.setContentTitle("Hello")
.setContentText("Welcome to GeeksforGeeks!!")
.setPriority(NotificationCompat.PRIORITY_HIGH)
// Pass the icon or bitmap image
.setLargeIcon(bitmap); // or use .setLargeIcon(icon) depending on your requirement
// converting resource file to icon
val icon: Icon = Icon.createWithResource(this, R.drawable.gfg_logo)
// converting resource file to bitmap image
val bitmap: Bitmap = BitmapFactory.decodeResource(resources, R.drawable.gfg_logo)
// Build the notification
val builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.gfg_logo)
.setContentTitle("Hello")
.setContentText("Welcome to GeeksforGeeks!!")
.setPriority(NotificationCompat.PRIORITY_HIGH)
// pass the icon or bitmap image
.setLargeIcon(icon)
4. Making notification expandable
In the short template of the notification, large information can't be shown. Therefore we need to make the notification expandable like this:
to make such an expandable notification we use the setStyle() method on the notification builder (nBuilder) object. In this expanded area we can display an image, any text, different messages, etc. In our Application, we have added an image by passing the instance of the NotificationCompat.BigPictureStyle class to setStyle() method.
Java
// Build the notification
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.gfg_logo)
.setLargeIcon(bitmap)
.setContentTitle("Hello")
.setContentText("Welcome to GeeksforGeeks!!")
.setPriority(NotificationCompat.PRIORITY_HIGH)
// Expandable notification
.setStyle(new NotificationCompat.BigPictureStyle()
.bigPicture(bitmap) // Set the big image for the expanded view
.bigLargeIcon(null) // Set null for bigLargeIcon to hide the large icon in the expanded view
);
// Build the notification
val builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.gfg_logo)
.setLargeIcon(bitmap)
.setContentTitle("Hello")
.setContentText("Welcome to GeeksforGeeks!!")
.setPriority(NotificationCompat.PRIORITY_HIGH)
// Expandable notification
.setStyle(
NotificationCompat.BigPictureStyle()
.bigPicture(bitmap)
// as we pass null in bigLargeIcon() so the large icon
// will goes away when the notification will be expanded.
.bigLargeIcon(null as Bitmap?)
)
5. Making notification clickable
We need to make our notification clickable to perform some action by clicking the notification such as open an activity or system setting or any webpage etc. Now to perform such actions intent is needed (e.g. explicit or implicit intent). In our Application, we are making an Implicit intent to open the GFG official home page.
Java
// Creating the Implicit Intent to
// open the home page of GFG
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(Uri.parse("https://www.geeksforgeeks.org/"));
// Creating the Implicit Intent to
// open the home page of GFG
val intent= Intent()
intent.action=Intent.ACTION_VIEW
intent.data=Uri.parse("https://www.geeksforgeeks.org/")
Now it is not necessary that whenever the notification will appear then the user will click it instantly, user can click it whenever he /she wants and therefore we also need to make an instance of PendingIntent which basically makes the intent action pending for future purpose.
Java
// Here the four parameters are context of activity,
// requestCode, Intent and flag of the pendingIntent respectively
// The request code is used to trigger a
// particular action in application activity
PendingIntent pendingIntent = PendingIntent
.getActivity(
this, // context
5, // request code
intent, // intent
PendingIntent.FLAG_IMMUTABLE // flags
);
// Build the notification
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.gfg_logo)
.setContentTitle("Hello")
.setContentText("Welcome to GeeksforGeeks!!")
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setContentIntent(pendingIntent) // Pending intent triggered when tapped
.setAutoCancel(true); // Dismiss notification when tapped
// Here the four parameters are context of activity,
// requestCode,Intent and flag of the pendingIntent respectively
// The request code is used to trigger a
// particular action in application activity
val pendingIntent = PendingIntent
.getActivity(
this, // context
5, // request code
intent, // intent
PendingIntent.FLAG_IMMUTABLE // flags
)
// Build the notification
val builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.gfg_logo)
.setContentTitle("Hello")
.setContentText("Welcome to GeeksforGeeks!!")
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setContentIntent(pendingIntent) // Pending intent triggered when tapped
.setAutoCancel(true) // Dismiss notification when tapped
6. Adding an action button to our notification
Sometimes there exists some action button at our notification template that is used to perform some action.
Here we also need an Intent and a PendingIntent. Then we need to pass the instance of the PendingIntent to addAction() method at the time of building the notification.
Java
// Creating the Implicit Intent
// to open the GFG contribution page
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(Uri.parse("https://www.geeksforgeeks.org/blogs/contribute/"));
PendingIntent pendingIntent = PendingIntent.getActivity(this, 6, intent, PendingIntent.FLAG_IMMUTABLE);
// Build the notification
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.gfg_logo)
.setContentTitle("Hello")
.setContentText("Welcome to GeeksforGeeks!!")
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setContentIntent(pendingIntent) // Pending intent triggered when tapped
.setAutoCancel(true) // Dismiss notification when tapped
// Here we need to pass 3 arguments which are
// icon id, title, pendingIntent respectively
// Here we pass 0 as icon id which means no icon
.addAction(0, "Let's Contribute", pendingIntent);
// Creating the Implicit Intent
// to open the GFG contribution page
val intent = Intent()
intent.action = Intent.ACTION_VIEW
intent.data = Uri.parse("https://www.geeksforgeeks.org/blogs/contribute/")
val pendingIntent= PendingIntent.getActivity(this, 6, intent, PendingIntent.FLAG_IMMUTABLE)
// Build the notification
val builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.gfg_logo)
.setContentTitle("Hello")
.setContentText("Welcome to GeeksforGeeks!!")
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setContentIntent(pendingIntent) // Pending intent triggered when tapped
.setAutoCancel(true) // Dismiss notification when tapped
// Here we need to pass 3 arguments which are
// icon id, title, pendingIntent respectively
// Here we pass 0 as icon id which means no icon
.addAction(0,"Let's Contribute", pendingIntent)
Example
Let discuss all the concepts by making an basic application. A sample GIF is given below to get an idea about what we are going to do in this article. Note that we are going to implement this project using the Kotlin/Java language.
Step by Step Implementation
Step 1: Create a New Project
To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that select Kotlin/Java as the programming language. Choose the API level according to your choice( Here we have chosen API Level 26).
Note: After creating the project successfully, please paste some pictures into the drawable folder in the res directory. Please follow this article if you don't know how to add image assets in your android project: How to add images in the android project?
This is what the folder structure should look like:
Step 2:Adding Permission for notification
Android 13 (API level 33) and higher need a permission for posting notifications from an app. For this, declare permission in the manifest file. Please manually make sure that the permission for notifications is provided for this app on phone.
<uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
Step 3: Working with the activity_main.xml file
Go to the activity_main.xml file and refer to the following code.
activity_main.xml:
XML
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white"
tools:context=".MainActivity">
<ImageView
android:id="@+id/imageView"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_marginTop="70dp"
android:src="@drawable/gfg_logo"
android:layout_margin="20dp"
app:layout_constraintBottom_toTopOf="@+id/editText1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_chainStyle="packed" />
<!-- EditText for entering the title-->
<EditText
android:id="@+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#d7ffd9"
android:hint="Enter The Title"
android:padding="10dp"
android:layout_margin="20dp"
android:textSize="20sp"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/editText2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/imageView" />
<!-- EditText for entering the text-->
<EditText
android:id="@+id/editText2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:background="#d7ffd9"
android:hint="Enter The Text"
android:padding="10dp"
android:layout_margin="20dp"
android:textSize="20sp"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/editText1" />
<!-- Button for sending notification-->
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:backgroundTint="@color/green"
android:text="Send Notification"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/editText2" />
</androidx.constraintlayout.widget.ConstraintLayout>
Layout:
Step 4: Insert a vector asset into the drawable folder in the res directory
Right-click on the drawable folder → New → Vector Asset → select appropriate Clip Art → give appropriate Name and adjust Size accordingly→ Next then click on the finish button as shown in the below image.
Step 5: Working with the MainActivity.kt file
Go to the MainActivity.kt file and refer to the following code. Below is the code for the MainActivity.kt file. Comments are added inside the code to understand the code in more detail.
MainActivity File:
Java
package org.geeksforgeeks.demo;
import android.Manifest;
import android.annotation.SuppressLint;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.Icon;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.app.NotificationCompat;
import androidx.core.app.NotificationManagerCompat;
public class MainActivity extends AppCompatActivity {
private EditText editText1;
private EditText editText2;
private Button button;
// Unique channel ID for notifications
public static final String CHANNEL_ID = "i.apps.notifications";
// Unique identifier for the notification
public static final int NOTIFICATION_ID = 1234;
// Description for the notification channel
public static final String DESCRIPTION = "Test notification";
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = findViewById(R.id.button);
editText1 = findViewById(R.id.editText1);
editText2 = findViewById(R.id.editText2);
// Create a notification channel (required for Android 8.0 and higher)
createNotificationChannel();
button.setOnClickListener(v -> {
// Request runtime permission for notifications on Android 13 and higher
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.POST_NOTIFICATIONS)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]
{Manifest.permission.POST_NOTIFICATIONS}, 101);
return;
}
}
// Trigger the notification
sendNotification();
});
}
/**
* Create a notification channel for devices running Android 8.0 or higher.
* A channel groups notifications with similar behavior.
*/
private void createNotificationChannel() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel notificationChannel = new NotificationChannel(
CHANNEL_ID,
DESCRIPTION,
NotificationManager.IMPORTANCE_HIGH
);
// Turn on notification light
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.GREEN);
// Allow vibration for notifications
notificationChannel.enableVibration(true);
NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.createNotificationChannel(notificationChannel);
}
}
/**
* Build and send a notification with a custom layout and action.
*/
private void sendNotification() {
// Intent that triggers when the notification is tapped
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(Uri.parse("https://www.geeksforgeeks.org/"));
PendingIntent pendingIntent = PendingIntent.getActivity(
this, 6, intent, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE
);
// Converting resource file to icon
Icon icon = Icon.createWithResource(this, R.drawable.gfg_logo);
// Converting resource file to bitmap image
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.gfg_logo);
// Build the notification
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.baseline_notification) // Notification icon
.setLargeIcon(bitmap)
.setContentTitle(editText1.getText().toString()) // Title displayed in the notification
.setContentText(editText2.getText().toString()) // Text displayed in the notification
.setContentIntent(pendingIntent) // Pending intent triggered when tapped
.setAutoCancel(true) // Dismiss notification when tapped
.setPriority(NotificationCompat.PRIORITY_HIGH) // Notification priority for better visibility
.setStyle(new NotificationCompat.BigPictureStyle()
.bigPicture(bitmap)
.bigLargeIcon(null))
.addAction(0, "Let's Contribute", pendingIntent);
// Display the notification
NotificationManagerCompat.from(this).notify(NOTIFICATION_ID, builder.build());
}
}
package org.geeksforgeeks.demo
import android.Manifest
import android.annotation.SuppressLint
import android.app.NotificationChannel
import android.app.NotificationManager
import android.app.PendingIntent
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.graphics.Color
import android.graphics.drawable.Icon
import android.net.Uri
import android.os.Build
import android.os.Bundle
import android.widget.Button
import android.widget.EditText
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.app.NotificationCompat
import androidx.core.app.NotificationManagerCompat
class MainActivity : AppCompatActivity() {
private lateinit var editText1: EditText
private lateinit var editText2: EditText
private lateinit var button: Button
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
button = findViewById(R.id.button)
editText1 = findViewById(R.id.editText1)
editText2 = findViewById(R.id.editText2)
// Create a notification channel (required for Android 8.0 and higher)
createNotificationChannel()
button.setOnClickListener {
// Request runtime permission for notifications on Android 13 and higher
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
if (ActivityCompat.checkSelfPermission(
this,
Manifest.permission.POST_NOTIFICATIONS
) != PackageManager.PERMISSION_GRANTED
) {
ActivityCompat.requestPermissions(
this,
arrayOf(Manifest.permission.POST_NOTIFICATIONS),
101
)
return@setOnClickListener
}
}
sendNotification() // Trigger the notification
}
}
/**
* Create a notification channel for devices running Android 8.0 or higher.
* A channel groups notifications with similar behavior.
*/
private fun createNotificationChannel() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
val notificationChannel = NotificationChannel(
CHANNEL_ID,
DESCRIPTION,
NotificationManager.IMPORTANCE_HIGH
).apply {
enableLights(true) // Turn on notification light
lightColor = Color.GREEN
enableVibration(true) // Allow vibration for notifications
}
val notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
notificationManager.createNotificationChannel(notificationChannel)
}
}
/**
* Build and send a notification with a custom layout and action.
*/
@SuppressLint("MissingPermission")
private fun sendNotification() {
// Intent that triggers when the notification is tapped
val intent= Intent()
intent.action=Intent.ACTION_VIEW
intent.data= Uri.parse("https://www.geeksforgeeks.org/")
val pendingIntent = PendingIntent.getActivity(
this, 6, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
)
// converting resource file to icon
val icon: Icon = Icon.createWithResource(this, R.drawable.gfg_logo)
// converting resource file to bitmap image
val bitmap: Bitmap = BitmapFactory.decodeResource(resources, R.drawable.gfg_logo)
// Build the notification
val builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.baseline_notification) // Notification icon
.setLargeIcon(bitmap)
.setContentTitle(editText1.text.toString()) // Title displayed in the notification
.setContentText(editText2.text.toString()) // Text displayed in the notification
.setContentIntent(pendingIntent) // Pending intent triggered when tapped
.setAutoCancel(true) // Dismiss notification when tapped
.setPriority(NotificationCompat.PRIORITY_HIGH) // Notification priority for better visibility
.setStyle(
NotificationCompat.BigPictureStyle()
.bigPicture(bitmap)
.bigLargeIcon(null as Bitmap?)
)
.addAction(0,"Let's Contribute", pendingIntent)
// Display the notification
with(NotificationManagerCompat.from(this)) {
notify(NOTIFICATION_ID, builder.build())
}
}
companion object
{
// Unique channel ID for notifications
const val CHANNEL_ID = "i.apps.notifications"
// Unique identifier for the notification
const val NOTIFICATION_ID = 1234
// Description for the notification channel
const val DESCRIPTION = "Test notification"
}
}
Output:
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Software Setup and Configuration
Android Studio Tutorial It is stated that "If you give me six hours to chop down a tree then I will spend the first four hours in sharpening the axe". So in the Android Development World if we consider Android Development as the tree then Android Studio should be the axe. Yes, if you are starting Android Development then y
9 min read
File Structure & Components
Core Topics
How Does Android App Work?Developing an android application involves several processes that happen in a sequential manner. After writing the source code files, when developers click the Run button on the Android studio, plenty of operations and process starts at the backend. Every operation happening in the background is a c
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Activity Lifecycle in Android with Demo AppIn Android, an activity is referred to as one screen in an application. It is very similar to a single window of any desktop application. An Android app consists of one or more screens or activities. Each activity goes through various stages or a lifecycle and is managed by activity stacks. So when
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Introduction to GradleGradle is an open-source construction tool that is capable of controlling the development tasks with compilation and packaging, including testing, deployment and publishing. It is an automation tool that is based on Apache Ant and Apache Maven. This tool is capable of developing applications with in
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What is Context in Android?Android Applications are popular for a long time and it is evolving to a greater level as users' expectations are that they need to view the data that they want in an easier smoother view. Hence, the android developers must know the important terminologies before developing the app. In Android Progr
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Bundle in Android with ExampleIt is known that Intents are used in Android to pass to the data from one activity to another. But there is one another way, that can be used to pass the data from one activity to another in a better way and less code space ie by using Bundles in Android. Android Bundles are generally used for passi
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Activity State Changes In Android with ExamplePrerequisites: Activity lifecycle in android As it is known that every Android app has at least one activity associated with it. When the application begins to execute and runs, there are various state changes that activity goes through. Different events some user-triggered and some system triggered
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Processes and Application Lifecycle in AndroidAs an android developer, if one does not know the application lifecycle of android application or does not have in-depth knowledge about it, there are very high chances that the application will not have a good user experience. Not having proper knowledge of the application lifecycle will not affect
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Desugaring in AndroidGoogle has officially announced Kotlin as a recommended language for Android Development and that's why so many developers are switching from Java to Kotlin for Android development. So day by day new APIs are been introduced in Android by the Google Team and which are available in newer versions of
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Difference Between AndroidX and Android Support LibrariesSupport library packages in Android are a set of code libraries whose prime purpose is to provide backward-compatibility to the code and Android API framework. In the real world, there is a strong possibility that an application that is developed on the latest Android version is used on an older ver
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Memory Leaks in AndroidA memory leak is basically a failure of releasing unused objects from the memory. As a developer one does not need to think about memory allocation, memory deallocation, and garbage collection. All of these are the automatic process that the garbage collector does by itself, but the situation become
7 min read
Layout & View
Layouts in Android UI DesignLayout Managers (or simply layouts) are said to be extensions of the ViewGroup class. They are used to set the position of child Views within the UI we are building. We can nest the layouts, and therefore we can create arbitrarily complex UIs using a combination of layouts.There is a number of layou
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Android UI LayoutsLayouts in Android define the user interface and hold UI controls or widgets that appear on the screen of an application. Every Android application consists of View and ViewGroup elements. Since an application contains multiple activities—each representing a separate screen—every activity has multip
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LinearLayout and its Important Attributes with Examples in AndroidLinearLayout is one of the most basic layouts in android studio, that arranges multiple sub-views (UI elements) sequentially in a single direction i.e. horizontal or vertical manner by specifying the android:orientation attribute. If one applies android:orientation="vertical" then elements will be a
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Android LinearLayout in KotlinLinearLayout in Android is a ViewGroup subclass, used to arrange child view elements one by one in a singular direction either horizontally or vertically based on the orientation attribute. We can specify the linear layout orientation using the android:orientation attribute. All the child elements a
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Android RelativeLayout in KotlinRelativeLayout in Android is a ViewGroup subclass, that allows users to position child views relative to each other (e.g., view A to the right of view B) or relative to the parent (e.g., aligned to the top of the parent). Instead of using LinearLayout, we have to use RelativeLayout to design the use
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ConstraintLayout in AndroidConstraintLayout is the most advanced layout in Android that lets you create complex and responsive UIs while minimizing nested views due to its flat view hierarchy. ConstraintLayout is similar to that of other View Groups which we have seen in Android such as RelativeLayout, LinearLayout, and many
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TextView widget in Android with ExamplesWidget refers to the elements of the UI (User Interface) that help the user interact with the Android App. TextView is one of many such widgets which can be used to improve the UI of the app. TextView refers to the widget which displays some text on the screen based on the layout, size, colour, etc
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TextView in KotlinAndroid TextView is simply a view that are used to display the text to the user and optionally allow us to modify or edit it. First of all, open Kotlin project in Android Studio. Following steps are used to create Steps to Implement TextViewSteps by Step implementation for creating an application wh
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Working With the TextView in AndroidTextView in Android is one of the basic and important UI elements. This plays a very important role in the UI experience and depends on how the information is displayed to the user. This TextView widget in Android can be dynamized in various contexts. For example, if the important part of the inform
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Autosizing TextView in AndroidIf the user is giving the input and the input needs to be shown as TextView and if the user inputs the stuff which can go out of the screen, then in this case the font TextView should be decreased gradually. So, in this article, it has been discussed how the developer can reduce the size of TextView
6 min read
Button
Intent and Intent Filters
What is Intent in Android?In Android, it is quite usual for users to witness a jump from one application to another as a part of the whole process, for example, searching for a location on the browser and witnessing a direct jump into Google Maps or receiving payment links in Messages Application (SMS) and on clicking jumpin
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Implicit and Explicit Intents in Android with ExamplesPre-requisites: Android App Development Fundamentals for Beginners Guide to Install and Set up Android Studio Android | Starting with the first app/android project Android | Running your first Android app This article aims to tell about the Implicit and Explicit intents and how to use them in an and
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How to Send Data From One Activity to Second Activity in Android?This article aims to tell and show how to "Send the data from one activity to second activity using Intent" . In this example, we have two activities, activity_first which are the source activity, and activity_second which is the destination activity. We can send the data using the putExtra() method
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How to open dialer in Android through Intent?The phone dialer is an activity available with the Android operating system to call a number. Usually, such activity may or may not have an EditText, for taking the number as input, and a Call button. When the user presses the Call button, it invokes the dialer app activity. Use of 'tel:' prefix is
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Creating Multiple Screen Applications in AndroidThis article shows how to create an android application to move from one activity to another using the concept of Explicit Intents. Below are the steps for Creating a Simple Android Application to move from one activity to another activity.Step By Step ImplementationStep 1: Create a New Project in A
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How to Open Camera Through Intent and Display Captured Image in Android?The purpose of this article is to show how to open a Camera from inside an App and click the image and then display this image inside the same app. An android application has been developed in this article to achieve this. The opening of the Camera from inside our app is achieved with the help of th
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Toast & RecyclerView
Toasts for Android StudioA toast provides a simple popup message that is displayed on the current activity UI screen (e.g. Main Activity). Example: Syntax:// To get ContextContext context = getApplicationContext(); // Message to displayString text = "Toast message"; // Toast time duration, can also set manual value int dura
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What is Toast and How to Use it in Android with Examples?Pre-requisites: Android App Development Fundamentals for BeginnersGuide to Install and Set up Android StudioAndroid | Starting with the first app/android projectAndroid | Running your first Android appWhat is Toast in Android? A Toast is a feedback message. It takes a very little space for displayin
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Android Toast in KotlinA Toast is a short alert message shown on the Android screen for a short interval of time. Android Toast is a short popup notification which is used to display information when we perform any operation in our app. In this tutorial, we shall not just limit ourselves by creating a lame toast but also
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How to Change Toast font in Android?A Toast is a feedback message. It takes a very little space for displaying while overall activity is interactive and visible to the user. It disappears after a few seconds. It disappears automatically. If user wants permanent visible message, Notification can be used. Note: Toast disappears automati
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How to add a custom styled Toast in AndroidA Toast is a feedback message. It takes very little space for displaying and it is displayed on top of the main content of an activity, and only remains visible for a short time period. This article explains how to create Custom Toast messages, which has custom background, image, icon, etc, which ar
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RecyclerView in Android with ExampleRecyclerView is a ViewGroup added to the android studio as a successor of the GridView and ListView. It is an improvement on both of them and can be found in the latest v-7 support packages. It has been created to make possible construction of any lists with XML layouts as an item which can be custo
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Android | Horizontal RecyclerView with ExamplesRecycler View is a ViewGroup added to Android Studio as a successor of the GridView and ListView. It is an improvement on both of them and can be found in the latest v-7 support packages. It has been created to make possible construction of any lists with XML layouts as an item which can be customiz
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How to create a nested RecyclerView in AndroidA nested RecyclerView is an implementation of a RecyclerView within a RecyclerView. An example of such a layout can be seen in a variety of apps such as the Play Store, where the outer (parent) RecyclerView is of vertical orientation, whereas the inner (child) RecyclerViews are of horizontal orienta
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How to Create RecyclerView with Multiple ViewType in Android?RecyclerView forms a crucial part of the UI in Android app development. It is especially important to optimize memory consumption when displaying a long list of items. A RecyclerView inflates a customized list of items, which can have either similar layouts or multiple distinct layouts. Here, we dev
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RecyclerView using ListView in Android With ExampleRecyclerView is a more flexible and advanced version of ListView and GridView. RecyclerView is used for providing a limited window to a large data set, which means it is used to display a large amount of data that can be scrolled very efficiently by maintaining a limited number of Views. In Recycler
5 min read