StackOverflow2013

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POAlphabetize queried Music Files in ListView
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copied!<p>Ok so im making a media player app for android. everything was ok until now. so far i have a list view that shows all .mp3 files on ur sdcard(internal and external) and when playing show a music visualizer. but i cant for the life of me alphabetize the list. everything is dynamic so xml doesnt work here.</p> <pre><code> public class MusicPlayerActivity extends Activity { ListView musiclist; Cursor musiccursor; int music_column_index; int count; private Intent aIntent; public static String filename; private RelativeLayout mRelativeLayout; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); init_phone_music_grid(); mRelativeLayout = new RelativeLayout(this); setContentView(mRelativeLayout); mRelativeLayout.addView(musiclist); } public void init_phone_music_grid() { System.gc(); String[] projection = { MediaStore.Audio.Media._ID, MediaStore.Audio.Media.ARTIST, MediaStore.Audio.Media.TITLE, MediaStore.Audio.Media.DATA, MediaStore.Audio.Media.DISPLAY_NAME, MediaStore.Audio.Media.DURATION, MediaStore.Audio.Media.ALBUM }; Uri allsongsuri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0"; musiccursor = managedQuery(allsongsuri, projection , selection, null, null); count = musiccursor.getCount(); musiclist = (ListView) findViewById(R.id.PhoneMusicList); musiclist.setAdapter(new EfficientAdapter(getApplicationContext())); musiclist.setOnItemClickListener(musicgridlistener); } private OnItemClickListener musicgridlistener = new OnItemClickListener() { public void onItemClick(AdapterView parent, View v, int position,long id) { System.gc(); music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA); musiccursor.moveToPosition(position); filename = musiccursor.getString(music_column_index); aIntent = new Intent(v.getContext(), AudioFX.class); aIntent.getStringExtra(filename); startActivity(aIntent); } }; class EfficientAdapter extends BaseAdapter { private Context mContext; public EfficientAdapter(Context c) { mContext = c; } public int getCount() { return count; } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { System.gc(); String id = null; TextView tv; if (convertView == null) { tv = new TextView(mContext.getApplicationContext()); } else{ tv = (TextView) convertView; } musiccursor.moveToPosition(position); music_column_index = musiccursor .getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE); id = musiccursor.getString(music_column_index); tv.setText(id); tv.setTextSize(20); return tv; }}} </code></pre>

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