Question

I’ve noticed something odd about the behavior of my code and am hoping someone can shed some light.

        String temp = "file:///sdcard/music/05 Folsom Prison Blues.mp3";
        String temp2 = "content://media/external/audio/media/10";

        Uri uri = Uri.parse(temp);

        Cursor musiccursor = null;
        musiccursor = managedQuery(uri, null, null, null, null);

        try {
        if (musiccursor.moveToFirst()) {
            String title; 
            int titleColumn = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE); 
                title = musiccursor.getString(titleColumn);
            item.setText(title);
        }

The problem I’m noticing is that with temp2 everything runs fine, I’m able to get the song’s title. But with temp musiccursor is null every time so we throw a nullpointerexception. Any idea what the difference is here? I’ve tried the encoded version of temp (converts spaces to %20 etc) and that doesn’t work. I can use the uri that is created with temp2 to play the song using an intent no problem… Not sure what I’m missing here.

Thanks in advance!

Answer 1

file:// is not a scheme managed by a content provider (only content:// is), and so a ContentResolver will not be able to do anything with it.