RecyclerView alarmmanager Splash handler Room App_center_Study_1 JikBit onPrepareOptionsMenu CustomDialog forEachInedxed List<TextView> shape Drwable Android Permission Content Provider - SAF ContentLoadingProgressBar SwiperRefreshLayout FLAG_UPDATE_CURRENT - onNewIntent Jsonparse remote config layoutinflater SharedPreference PendingIntent Activity Lifecycle View Binding Google Login API ViewPager2 broadcastreceiver Runtime Permission Ripple Effect tablelayout oauth2 Kotlin SeekBar runOnUiThread CountDownTimer Retrofit cloud message soundpool CustomView onDraw AlertDialog MediaRecorder 앱센터 WebView access_token glide loading notification mediaplayer theme Interface thread