Today I Learned

오늘은 실습 카톡 알림창을 구현해봤다.

카톡 알림 구현

• 앱에서 알림 버튼을 누르면 알림창이 뜨고 text를 입력할 수 있는 알림창을 만들고, 제목과 내용, sender, 이미지까지 포함된 알림을 구현해봤다.

• MainActivity

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        val permissionLauncher = registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {
            if (it.all{permission -> permission.value == true}){
                noti()
            } else {
                Toast.makeText(this, "permission denied...", Toast.LENGTH_SHORT).show()
            }
        }

        binding.notificationButton.setOnClickListener {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU){
                if(ContextCompat.checkSelfPermission(
                    this,
                    "android.permission.POST_NOTIFICATIONS"
                ) == PackageManager.PERMISSION_GRANTED){
                    noti()
                } else {
                    permissionLauncher.launch(arrayOf("android.permission.POST_NOTIFICATIONS"))
                }
            } else {
                noti()
            }
        }
    }

    fun noti(){
        val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        val builder: NotificationCompat.Builder
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
            val channelId = "one-channel"
            val channelName = "My Channel One"
            val channel = NotificationChannel(
                channelId,
                channelName,
                NotificationManager.IMPORTANCE_DEFAULT
            ).apply {
                // 채널 설정
                description = "My Channel Description"
                setShowBadge(true)
                val uri: Uri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)
                val audioAttributes = AudioAttributes.Builder()
                    .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
                    .setUsage(AudioAttributes.USAGE_ALARM)
                    .build()
                setSound(uri, audioAttributes)
                enableVibration(true)
            }
            manager.createNotificationChannel(channel)
            builder = NotificationCompat.Builder(this, channelId)
        } else {
            builder = NotificationCompat.Builder(this)
        }

        builder.run{
            setSmallIcon(R.drawable.small)
            setWhen(System.currentTimeMillis())
            setContentTitle("홍길동")
            setContentText("안녕하세요?")
            setLargeIcon(BitmapFactory.decodeResource(resources, R.drawable.big))
        }

        val KEY_TEXT_REPLY = "key_text_reply"
        var replyLabel = "답장"
        var remoteInput: RemoteInput = RemoteInput.Builder(KEY_TEXT_REPLY).run {
            setLabel(replyLabel)
            build()
        }
        val replyIntent = Intent(this, ReplyReceiver::class.java)
        val replyPendingIntent = PendingIntent.getBroadcast(
            this, 30, replyIntent, PendingIntent.FLAG_MUTABLE
        )

        builder.addAction(
            NotificationCompat.Action.Builder(
                R.drawable.send,
                "답장",
                replyPendingIntent
            ).addRemoteInput(remoteInput).build()
        )
        manager.notify(11, builder.build())
    }
}

• ReplyReceiver

class ReplyReceiver : BroadcastReceiver() {

    override fun onReceive(context: Context, intent: Intent) {
        // 알림 입력 글 획득
        val replyTxt = RemoteInput.getResultsFromIntent(intent)?.getCharSequence("key_text_reply")
        Log.d("event", "replyTxt : $replyTxt")
        // 알림 취소
        val manager = context.getSystemService(AppCompatActivity.NOTIFICATION_SERVICE) as NotificationManager
        manager.cancel(11)
    }
}

• activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center">

    <Button
        android:id="@+id/notificationButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="알림 발생"/>

</LinearLayout>

• AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">

    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.AndroidLab">
        <activity
            android:name=".MainActivity2"
            android:exported="false" />
        <activity
            android:name=".MainActivity"
            android:exported="true"
            android:label="@string/app_name"
            android:theme="@style/Theme.AndroidLab">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>