안드로이드 Notification Action Button

action2, action3 을 만들고 NotificationCompat.Builder 에서 addAction으로 값을 넣어준다

package com.anushka.notificationdemo

import android.app.NotificationChannel
import android.app.NotificationManager
import android.app.PendingIntent
import android.content.Context
import android.content.Intent
import android.os.Build
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import androidx.core.app.NotificationCompat

class MainActivity : AppCompatActivity() {
    private val channelID = "com.anushka.notificationdemo.channel1"
    private var notificationManager: NotificationManager? = null
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val button = findViewById<Button>(R.id.button)
        notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        createNotificationChannel(channelID,"DemoChannel","this is a demo")
        button.setOnClickListener {
            displayNotification()
        }
    }


    private fun displayNotification(){
        val notificationId = 45

        val tapResultIntent = Intent(this, SecondActivity::class.java)
        val pendingIntent: PendingIntent = PendingIntent.getActivity(
            this,
            0,
            tapResultIntent,
            PendingIntent.FLAG_UPDATE_CURRENT
        )


        //action button 1
        val intent2 = Intent(this, DetailsActivity::class.java)
        val pendingIntent2: PendingIntent = PendingIntent.getActivity(
            this,
            0,
            intent2,
            PendingIntent.FLAG_UPDATE_CURRENT
        )
        val action2 : NotificationCompat.Action =
            NotificationCompat.Action.Builder(0,"Details",pendingIntent2).build()
        // action button 2
        val intent3 = Intent(this, SettingsActivity::class.java)
        val pendingIntent3: PendingIntent = PendingIntent.getActivity(
            this,
            0,
            intent3,
            PendingIntent.FLAG_UPDATE_CURRENT
        )
        val action3 : NotificationCompat.Action =
            NotificationCompat.Action.Builder(0,"Settings",pendingIntent3).build()


        val notification = NotificationCompat.Builder(this@MainActivity,channelID)
            .setContentTitle("Demo Title")
            .setContentText("This is a demo notification")
            .setSmallIcon(android.R.drawable.ic_dialog_info)
            .setAutoCancel(true)
            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
            .setContentIntent(pendingIntent)
            .addAction(action2)
            .addAction(action3)
            .build()
        notificationManager?.notify(notificationId,notification)

    }

    private fun createNotificationChannel(id : String, name:String, channelDescription:String){
        if(Build.VERSION.SDK_INT>= Build.VERSION_CODES.O){
            val importance = NotificationManager.IMPORTANCE_HIGH
            val channel = NotificationChannel(id,name,importance).apply {
                description = channelDescription
            }
            notificationManager?.createNotificationChannel(channel)
        }
    }
}