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In my app I'm trying to extract album arts from all music files in phone storage and then I populate them into my RecyclerView. I'm successfully getting everything but still it's taking a lot of time for all tracks to get rendered into my RecyclerView. All I want to do is as soon as my app is launched all tracks should be filled up in RecyclerView instantly with appropriate album art without any delay. I tried to put my code into coroutines but still it is taking a lot of delay. Any help will be appreciated.
fun getSongList() = GlobalScope.launch(Dispatchers.IO)
{
async {
realm = Realm.getDefaultInstance()
val iterator = FileUtils.iterateFiles(
Environment.getExternalStorageDirectory(),
FileFilterUtils.suffixFileFilter("m4a"),
TrueFileFilter.INSTANCE)
while (iterator.hasNext()) {
try {
val fileINeed = iterator.next()
val thisurls = fileINeed.canonicalPath
val mmr = MediaMetadataRetriever()
mmr.setDataSource(thisurls)
var thisTitle = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_TITLE)
var thisArtist = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST)
if (thisTitle.isNullOrEmpty()) {
thisTitle = fileINeed.name
}
if (thisArtist.isNullOrEmpty()) {
thisArtist = "Unknown Artist"
}
val query = realm!!.where(Songdetails::class.java).equalTo("songname",thisTitle).findFirst()
if(query == null)
{
val retriever = MediaMetadataRetriever()
retriever.setDataSource(thisurls)
val art = retriever.embeddedPicture
if (art != null) {
var bitmap = BitmapFactory.decodeByteArray(art, 0, art.size)
ImageSaver(MainActivity.getInstance()!!)
.setFileName(thisTitle)
.setDirectoryName("images")
.save(bitmap)
realm = Realm.getDefaultInstance()
realm!!.executeTransaction(object : Realm.Transaction {
override fun execute(realm: Realm) {
// increment index
var num = realm.where(Songdetails::class.java).max("id")
var nextID: Int
if (num == null) {
nextID = 1
} else {
nextID = num.toInt() + 1
}
var songitem = realm!!.createObject(Songdetails::class.java, nextID)
songitem.songname = thisTitle
songitem.songartist = thisArtist
songitem.songurl = thisurls
songitem.songimage = thisTitle
EventBus.getDefault().post("update")
}
})
}
else{
realm = Realm.getDefaultInstance()
realm!!.executeTransaction(object : Realm.Transaction {
override fun execute(realm: Realm) {
// increment index
var num = realm.where(Songdetails::class.java).max("id")
var nextID: Int
if (num == null) {
nextID = 1
} else {
nextID = num.toInt() + 1
}
var songitem = realm!!.createObject(Songdetails::class.java, nextID)
songitem.songname = thisTitle
songitem.songartist = thisArtist
songitem.songurl = thisurls
songitem.songimage = "custom"
EventBus.getDefault().post("update")
}
})
}
}
}catch (ex:Exception)
{
}
}
realm = Realm.getDefaultInstance()
val mp3iterator = FileUtils.iterateFiles(
Environment.getExternalStorageDirectory(),
FileFilterUtils.suffixFileFilter("mp3"),
TrueFileFilter.INSTANCE)
while (mp3iterator.hasNext()) {
try {
val fileINeed = mp3iterator.next()
val thisurls = fileINeed.canonicalPath
val mmr = MediaMetadataRetriever()
mmr.setDataSource(thisurls)
var thisTitle = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_TITLE)
var thisArtist = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST)
if (!thisTitle.isNullOrEmpty()) {
val query = realm!!.where(Songdetails::class.java).equalTo("songname", thisTitle).findFirst()
if (query == null) {
val retriever = MediaMetadataRetriever()
retriever.setDataSource(thisurls)
val art = retriever.embeddedPicture
if (art != null) {
var bitmap = BitmapFactory.decodeByteArray(art, 0, art.size)
ImageSaver(MainActivity.getInstance()!!)
.setFileName(thisTitle)
.setDirectoryName("images")
.save(bitmap)
realm = Realm.getDefaultInstance()
realm!!.executeTransaction(object : Realm.Transaction {
override fun execute(realm: Realm) {
// increment index
var num = realm.where(Songdetails::class.java).max("id")
var nextID: Int
if (num == null) {
nextID = 1
} else {
nextID = num.toInt() + 1
}
var songitem = realm!!.createObject(Songdetails::class.java, nextID)
songitem.songname = thisTitle
songitem.songartist = thisArtist
songitem.songurl = thisurls
songitem.songimage = thisTitle
EventBus.getDefault().post("update")
}
})
}
else{
realm = Realm.getDefaultInstance()
realm!!.executeTransaction(object : Realm.Transaction {
override fun execute(realm: Realm) {
// increment index
var num = realm.where(Songdetails::class.java).max("id")
var nextID: Int
if (num == null) {
nextID = 1
} else {
nextID = num.toInt() + 1
}
var songitem = realm!!.createObject(Songdetails::class.java, nextID)
songitem.songname = thisTitle
songitem.songartist = thisArtist
songitem.songurl = thisurls
songitem.songimage = "custom"
EventBus.getDefault().post("update")
}
})
}
}
}
}catch (ex:Exception)
{
}
}
realm = Realm.getDefaultInstance()
val waviterator = FileUtils.iterateFiles(
Environment.getExternalStorageDirectory(),
FileFilterUtils.suffixFileFilter("wav"),
TrueFileFilter.INSTANCE)
while (waviterator.hasNext()) {
try {
val fileINeed = waviterator.next()
val thisurls = fileINeed.canonicalPath
val mmr = MediaMetadataRetriever()
mmr.setDataSource(thisurls)
var thisTitle = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_TITLE)
var thisArtist = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST)
if (thisTitle.isNullOrEmpty()) {
thisTitle = fileINeed.name
}
if (thisArtist.isNullOrEmpty()) {
thisArtist = "Unknown Artist"
}
val query = realm!!.where(Songdetails::class.java).equalTo("songname", thisTitle).findFirst()
if (query == null) {
val retriever = MediaMetadataRetriever()
retriever.setDataSource(thisurls)
val art = retriever.embeddedPicture
if (art != null) {
var bitmap = BitmapFactory.decodeByteArray(art, 0, art.size)
ImageSaver(MainActivity.getInstance()!!)
.setFileName(thisTitle)
.setDirectoryName("images")
.save(bitmap)
realm = Realm.getDefaultInstance()
realm!!.executeTransaction(object : Realm.Transaction {
override fun execute(realm: Realm) {
// increment index
var num = realm.where(Songdetails::class.java).max("id")
var nextID: Int
if (num == null) {
nextID = 1
} else {
nextID = num.toInt() + 1
}
var songitem = realm!!.createObject(Songdetails::class.java, nextID)
songitem.songname = thisTitle
songitem.songartist = thisArtist
songitem.songurl = thisurls
songitem.songimage = thisTitle
EventBus.getDefault().post("update")
}
})
} else {
realm = Realm.getDefaultInstance()
realm!!.executeTransaction(object : Realm.Transaction {
override fun execute(realm: Realm) {
// increment index
var num = realm.where(Songdetails::class.java).max("id")
var nextID: Int
if (num == null) {
nextID = 1
} else {
nextID = num.toInt() + 1
}
var songitem = realm!!.createObject(Songdetails::class.java, nextID)
songitem.songname = thisTitle
songitem.songartist = thisArtist
songitem.songurl = thisurls
songitem.songimage = "custom"
EventBus.getDefault().post("update")
}
})
}
}
} catch (ex: Exception) {
}
}
}
}
849
asked Dec 28 '25 15:12
You might be able to take advantage of Coil or Picasso to better cache the bitmaps for subsequent launches. The initial one is going to take some time regardless of the method used due to the a variety of variables (number of tracks, size of image tracks, etc.)
88
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