Show Notifications On Any Device - Java

Working with android notifications using Android Studio and Java

In this video we will simply show notification on clicking of button. The notification will work on any Android OS.

Video

Step 1: Create a new project OR Open your project

Step 2: Code:

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.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:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><Buttonandroid:id="@+id/showNotificationBtn"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="Show Notification"style="@style/Base.Widget.AppCompat.Button.Colored"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintLeft_toLeftOf="parent"app:layout_constraintRight_toRightOf="parent"app:layout_constraintTop_toTopOf="parent" /></android.support.constraint.ConstraintLayout>

MainActivity.java

package com.blogspot.adtechofficial.simplenotification;import android.app.NotificationChannel;import android.app.NotificationManager;import android.os.Build;import android.support.v4.app.NotificationCompat;import android.support.v4.app.NotificationManagerCompat;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;public class MainActivity extends AppCompatActivity {//there can be multiple notifications so it can be used as notification identityprivate static final String CHANNEL_ID = "channel_id01";private static final int NOTIFICATION_ID = 1;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button showNotificattionBtn = findViewById(R.id.showNotificationBtn);showNotificattionBtn.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {//click button to show notificationshowNotification();}});}private void showNotification() {createNotificationChannel();//creating notificationNotificationCompat.Builder builder = new NotificationCompat.Builder(this , CHANNEL_ID);//iconbuilder.setSmallIcon(R.drawable.ic_notification);//titlebuilder.setContentTitle("Title of Notification");//descriptionbuilder.setContentText("This is the description of the notification");//set prioritybuilder.setPriority(NotificationCompat.PRIORITY_DEFAULT);//notification managerNotificationManagerCompat notificationManagerCompat = NotificationManagerCompat.from(this);notificationManagerCompat.notify(NOTIFICATION_ID , builder.build());}private void createNotificationChannel() {if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){CharSequence name = "My Notification";String description = "My notification description";//importance of your notificationint importance = NotificationManager.IMPORTANCE_DEFAULT;NotificationChannel notificationChannel = new NotificationChannel(CHANNEL_ID , name , importance);notificationChannel.setDescription(description);NotificationManager notificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);notificationManager.createNotificationChannel(notificationChannel);}}}

Step 3: Run Project

Output

Show Notifications on any device - Java