【ANDROID STUDIO】 Direct Reply Action Buttons Notification

 package com.example.notificationdemo

import android.app.NotificationManager
import android.app.RemoteInput
import android.content.Context
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.core.app.NotificationBuilderWithBuilderAccessor
import androidx.core.app.NotificationCompat
import androidx.core.app.NotificationManagerCompat
import kotlinx.android.synthetic.main.activity_second.*

class SecondActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_second)
        recieveInput()
    }

    private fun recieveInput() {
        val KEY_REPLY = "key_reply"
        val intent = this.intent
        val remoteInput = RemoteInput.getResultsFromIntent(intent)
        if(remoteInput != null){
            val inputString = remoteInput.getCharSequence(KEY_REPLY).toString()
            result_text_view.text = inputString

            val channelID = "com.example.notificationdemo.channel1"
            val notificationId = 45

            val repliedNotification = NotificationCompat.Builder(this, channelID)
                .setSmallIcon(android.R.drawable.ic_dialog_info)
                .setContentText("Your reply received")
                .build()

            val notificationManager: NotificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager

            notificationManager.notify(notificationId, repliedNotification)


        }
    }
}