Question

I have mp3 files on sd card . how to get the path of file from sd card on selecting the file?

dynamically !…like if user click on file in list view its path get in variable for use.

public class PlayListActivity extends ListActivity {
    // Songs list
    public ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.playlist);    
        ArrayList<HashMap<String, String>> songsListData = new ArrayList<HashMap<String, String>>();    
        SongsManager plm = new SongsManager();
        // get all songs from sdcard
        this.songsList = plm.getPlayList();

        // looping through playlist
        for (int i = 0; i < songsList.size(); i++) {
            // creating new HashMap
            HashMap<String, String> song = songsList.get(i);

            // adding HashList to ArrayList
            songsListData.add(song);
        }    
        // Adding menuItems to ListView
        ListAdapter adapter = new SimpleAdapter(this, songsListData,
                R.layout.playlist_item, new String[] { "songTitle" }, new int[] {
                        R.id.songTitle });

        setListAdapter(adapter);

        // selecting single ListView item
        ListView lv = getListView();
        // listening to single listitem click
        lv.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                // getting listitem index
                int songIndex = position;

                // Starting new intent
                Intent in = new Intent(getApplicationContext(),
                        AndroidBuildingMusicPlayerActivity.class);
                // Sending songIndex to PlayerActivity
                in.putExtra("songIndex", songIndex);
                setResult(100, in);
                // Closing PlayListView
                finish();
            }
        });    
    }
}

Answer 1

I think you want to get file from a file open dialog, check out the below link

Reference: Choose File Dialog

You can get path of SD card with the help of command below:

String baseDir = Environment.getExternalStorageDirectory().getAbsolutePath();
String fileName = "myFile.mp3";

So path will be

String path  = baseDir + "/your folder(s)/" + fileName;

Reference is: Android how to use Environment.getExternalStorageDirectory()

Or you can try:

new File("/mnt/external_sd/your folder(s)../file.mp3");//get a file from SD card

Reference: How can I get external SD card path for Android 4.0+?