Get .mp3 format files from android device

android, android-sdcard, java

Solution

- Query the media files

- Check if the file is an mp3 by checking its extension

The following method will return all the mp3 audio files in your device:

private List<String> scanDeviceForMp3Files(){
    String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0";
    String[] projection = {
            MediaStore.Audio.Media.TITLE,
            MediaStore.Audio.Media.ARTIST,
            MediaStore.Audio.Media.DATA,
            MediaStore.Audio.Media.DISPLAY_NAME,
            MediaStore.Audio.Media.DURATION
    };
    final String sortOrder = MediaStore.Audio.AudioColumns.TITLE + " COLLATE LOCALIZED ASC";
    List<String> mp3Files = new ArrayList<>();

    Cursor cursor = null;
    try {
        Uri uri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
        cursor = getContentResolver().query(uri, projection, selection, null, sortOrder);
        if( cursor != null){
            cursor.moveToFirst();

            while( !cursor.isAfterLast() ){
                String title = cursor.getString(0);
                String artist = cursor.getString(1);
                String path = cursor.getString(2);
                String displayName  = cursor.getString(3);
                String songDuration = cursor.getString(4);
                cursor.moveToNext();
                if(path != null && path.endsWith(".mp3")) {
                    mp3Files.add(path);
                }
            }

        }

        // print to see list of mp3 files
        for( String file : mp3Files) {
            Log.i("TAG", file);
        }

    } catch (Exception e) {
        Log.e("TAG", e.toString());
    }finally{
        if( cursor != null){
            cursor.close();
        }
    }
    return mp3Files;
}

Problem

I'm developing a music player. I want to get all .mp3 format files from android device. But this code is not getting any files. My .mp3 files are in 'sdcard/music' folder. If i change the `MEDIA_PATH = new String("sdcard/music");` like this it's getting files only from that music folder. But i need to get all .mp3 files from each and every folder in my external/internal memorycard. Please help me. this is my code. ``` final String MEDIA_PATH = new String(Environment.getExternalStorageDirectory()); public void Generate_Database(){ File home = new File(MEDIA_PATH); if (home.listFiles(new FileExtensionFilter()).length > 0) { for (File file : home.listFiles(new FileExtensionFilter())) { String title = file.getName().substring(0, (file.getName().length() - 4)); String path = file.getPath(); mediaInfo.setDataSource(path); String albumName = "unknown",artist = "unknown",genere = "unknown",duration = "unknown",composer = "unknown"; if(mediaInfo.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM) == null) albumName = "unknown"; else{ albumName = mediaInfo.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM); } if(mediaInfo.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST) == null) artist = "unknown"; else{ artist = mediaInfo.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST); } if(mediaInfo.extractMetadata(MediaMetadataRetriever.METADATA_KEY_GENRE) == null) genere = "unknown"; else{ genere = mediaInfo.extractMetadata(MediaMetadataRetriever.METADATA_KEY_GENRE); } if(mediaInfo.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION) == null) duration = "unknown"; else{ duration = mediaInfo.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION); } if(mediaInfo.extractMetadata(MediaMetadataRetriever.METADATA_KEY_COMPOSER) == null) composer = "unknown"; else{ composer = mediaInfo.extractMetadata(MediaMetadataRetriever.METADATA_KEY_COMPOSER); } //Toast.makeText(getApplicationContext(), title+path+ albumName+artist+ genere+ duration+ composer, Toast.LENGTH_LONG).show(); ds.createEntry2(title, path, albumName, artist, genere, duration, composer); } } ``` this is used to extract the .mp3 files ``` class FileExtensionFilter implements FilenameFilter { public boolean accept(File dir, String name) { return (name.endsWith(".mp3") || name.endsWith(".MP3")); } } ```

Original source

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