Waiting for some function complete in android

user_10354318 0
Viewed 44

in my android app(media player), i'm scanning all media files in loadingActivity.kt file. and then starting mainActivity.kt. my code is 

scanSongs()
intent = Intent(this, MainActivity::class.java)
startActivity(intent)

and my scanSongs() function is

private fun scanSongs() {
        val songsJob = async {
            val songsFinder = SongsLoader(contentResolver)
            songsFinder.load()
            songsFinder.getAllSongs()
        }
        launch {
            allSongsList = songsJob.await()
            allSongsList?.sortBy { it.getTitle() }
        }
    }

but before scan complete it is opening mainActivity . and showing empty list . how can i waiting for complete scanSong() , before open mainActivity

android
2 Answers

Open the MainActivity when you have the allSongsList:

private fun scanSongs() {
        val songsJob = async {
            val songsFinder = SongsLoader(contentResolver)
            songsFinder.load()
            songsFinder.getAllSongs()
        }
        launch {
            allSongsList = songsJob.await()
            allSongsList?.sortBy { it.getTitle() }
            intent = Intent(this, MainActivity::class.java)
            startActivity(intent)
        }
    }
user_128440580

You have to check a condition before start mainactivity.kt that

song list is null or not

Admin1
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