android_Slip_6B

1. activity_main.xml (layout file for MainActivity):

<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:paddingLeft="16dp"
android:paddingTop="16dp"
android:paddingRight="16dp"
android:paddingBottom="16dp"
tools:context=".MainActivity">

<EditText
android:id="@+id/editTextNotificationMessage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter Notification Message" />

<Button
android:id="@+id/buttonSendNotification"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/editTextNotificationMessage"
android:layout_marginTop="16dp"
android:text="Send Notification" />
</RelativeLayout>

1. MainActivity.java:

import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

private EditText editTextNotificationMessage;
private Button buttonSendNotification;

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

editTextNotificationMessage = findViewById(R.id.editTextNotificationMessage);
buttonSendNotification = findViewById(R.id.buttonSendNotification);

buttonSendNotification.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendNotification();
}
});
}

private void sendNotification() {
String message = editTextNotificationMessage.getText().toString();

NotificationService.sendNotification(this, message);
} }

2. activity_second.xml (layout file for SecondActivity):

<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:paddingLeft="16dp"
android:paddingTop="16dp"
android:paddingRight="16dp"
android:paddingBottom="16dp"
tools:context=".SecondActivity">

<TextView
android:id="@+id/textViewNotificationMessage"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>

2.SecondActivity.java:

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

public class SecondActivity extends AppCompatActivity {

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

TextView textViewNotificationMessage = findViewById(R.id.textViewNotificationMessage);

// Retrieve the notification message from intent
String notificationMessage = getIntent().getStringExtra("notificationMessage");

// Display the notification message
if (notificationMessage != null) {
textViewNotificationMessage.setText(notificationMessage);
}
}
}

NotificationService.java:

import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.os.Build;

import androidx.core.app.NotificationCompat;

public class NotificationService {

private static final String CHANNEL_ID = "MyNotificationChannel";

public static void sendNotification(Context context, String message) {
// Create an explicit intent for SecondActivity
Intent intent = new Intent(context, SecondActivity.class);
intent.putExtra("notificationMessage", message);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);

// Create a PendingIntent for the notification
int requestCode = 0;
int flags = 0;
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, CHANNEL_ID)
.setSmallIcon(R.drawable.ic_notification)
.setContentTitle("Notification Example")
.setContentText(message)
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setContentIntent(NotificationActivity.getPendingIntent(context, intent, requestCode, flags))
.setAutoCancel(true);

// Create a notification channel for devices running Android Oreo and higher
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
CharSequence name = "My Notification Channel";
String description = "Description";
int importance = NotificationManager.IMPORTANCE_DEFAULT;
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
channel.setDescription(description);
NotificationManager notificationManager = context.getSystemService(NotificationManager.class);
notificationManager.createNotificationChannel(channel);
}

// Get the NotificationManager and notify the user
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(1, builder.build());
}
}