Ali Akhgar Ali Akhgar - 4 months ago 24
Android Question

Android Media Scan takes too long

I'm using the code below to

scan all media/mp3
files on the device, but it takes too long when there is a lot of music on the device.

I was wondering if there is a faster way to get and show all musics or not?

Note: the code doesn't cause crash or hang up or any other thing...

class GetLocals extends AsyncTask<Void,Void,Void> {

@Override
protected void onPreExecute() {
super.onPreExecute();
SongCover_lc.clear();
SongID_lc.clear();
Singer_lc.clear();
Path_lc.clear();
AlbumName_lc.clear();
SongName_lc.clear();
}

@Override
protected Void doInBackground(Void... voids) {

try {
String[] STAR = {"*"};
Cursor cursor;
Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0";

cursor = context.getContentResolver().query(uri, STAR, selection, null, null);

if (cursor != null) {
if (cursor.moveToFirst()) {
do {
String songName = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.TITLE));
String path = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA));
String albumName = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM));
String singer = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
String songid = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID));

MediaMetadataRetriever mmr = new MediaMetadataRetriever();
mmr.setDataSource(path);
byte[] artBytes = mmr.getEmbeddedPicture();
if (artBytes != null) {
InputStream is = new ByteArrayInputStream(mmr.getEmbeddedPicture());
Bitmap bm = BitmapFactory.decodeStream(is);
SongCover_lc.add(bm);
} else {
SongCover_lc.add(BitmapFactory.decodeResource(getResources(), R.color.white));
}

SongName_lc.add(songName);
AlbumName_lc.add(albumName);
Path_lc.add(path);
Singer_lc.add(singer);
SongID_lc.add(songid);

} while (cursor.moveToNext());
}
}
} catch (Exception e){
System.out.println("CAAAAAAAAAAATCH");
}
return null;
}

@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
lazyAdapter_localSongs = new LazyAdapter_LocalSongs(activity,SongName_lc,Singer_lc,SongCover_lc,AlbumName_lc,Path_lc);
listviewloclas.setAdapter(lazyAdapter_localSongs);
}
}

k3b k3b
Answer
> I was wondering if there is a faster way to get 
> and show all musics ...

Replace your array-based adapter with a CursorAdapter that will load the songs on demand.

So instead of pre-loading 1000 songs into arrays before your listview/grid becomes usable you just load the 10 songs that are visible at a time.