how to do thread operations in android

Anyone give example program which explains android Threads in a simpler way. For example, i want to list out the songs in a sd card in thread at the time of launch

i am using the following code to get the number of songs in sd card of an android device. From this i want to list out the songs in thread

private void init_phone_sd_card() 
    {   
        System.gc();
        final String[] proj = { MediaStore.Audio.Media._ID,MediaStore.Audio.Media.DATA,MediaStore.Audio.Media.DISPLAY_NAME,MediaStore.Audio.Media.SIZE };
        Log.e("media",""+proj);

        musiccursor = managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,proj, null, null, null);
        Log.e("media1",""+musiccursor);

        count = musiccursor.getCount();
        Log.e("media2",""+count);

how to do this......

Thx

Solution

Just put your code to AsyncTask's doInBackground() method. Task also should show ProgressDialog in order to tell user that some useful work is running. See this article.