Kotlin Notification 예제

NotificationHandler.kt

import android.app.Notification
import android.app.NotificationChannel
import android.app.NotificationManager
import android.app.PendingIntent
import android.content.Context
import android.content.Intent
import android.graphics.Color
import com.ran.todolist.R

class NotificationHandler(private val ctx: Context) {

    private val notificationManager: NotificationManager by lazy {
        ctx.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
    }

    companion object {
        private const val CHANNEL_ID = "com.ran.todolist"
        private const val NOTIFICATION_ID = 1001
    }

    fun createNotificationChannel(id: String, name: String, description: String) {
        val importance = NotificationManager.IMPORTANCE_LOW
        val channel = NotificationChannel(id, name, importance)

        channel.description = description
        channel.enableLights(true)
        channel.lightColor = Color.RED
        channel.enableVibration(true)
        channel.vibrationPattern = longArrayOf(100, 200, 300, 400, 500, 400, 300, 200, 400)
        notificationManager.createNotificationChannel(channel)
    }

    fun showNotification(contentText: String, resultIntent: Intent) {
        val pendingIntent = PendingIntent.getActivity(ctx, 0, resultIntent, 0)

        val notification = Notification.Builder(ctx, CHANNEL_ID)
                .setContentText(contentText)
                .setSmallIcon(R.drawable.ic_launcher)
                .setChannelId(CHANNEL_ID)
                .setContentIntent(pendingIntent)
                .build()

        notification.flags = Notification.FLAG_NO_CLEAR

        notificationManager.notify(NOTIFICATION_ID, notification)
    }

    fun dismissNotification() {
        notificationManager.cancel(NOTIFICATION_ID)
    }
}

MainActivity.kt

class MainActivity : AppCompatActivity() {
    private val notificationHandler: NotificationHandler by lazy {
        NotificationHandler(applicationContext)
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        notificationHandler.createNotificationChannel("ran", "ran", "ran")
        val resultIntent = Intent(this, this@MainActivity::class.java)
        notificationHandler.showNotification("이건 연습이에요", resultIntent)
    }
}