Android MediaStore obtiene distintas carpetas de archivos de música

Usted tendrá que utilizar ambas técnicas. MediaStore y explorador de archivos.

 public class MainActivity extends ActionBarActivity { private File file; private List<String> myList; private ListView listView; private TextView pathTextView; private String mediapath = new String(Environment.getExternalStorageDirectory().getAbsolutePath()); private final static String[] acceptedExtensions= {"mp3", "mp2", "wav", "flac", "ogg", "au" , "snd", "mid", "midi", "kar" , "mga", "aif", "aiff", "aifc", "m3u", "oga", "spx"}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); listView=(ListView) findViewById(R.id.pathlist); pathTextView=(TextView) findViewById(R.id.path); myList = new ArrayList<String>(); String root_sd = Environment.getExternalStorageDirectory().toString(); Log.e("Root",root_sd); String state = Environment.getExternalStorageState(); File list[] = null ; /* if ( Environment.MEDIA_MOUNTED.equals(state) || Environment.MEDIA_MOUNTED_READ_ONLY.equals(state) ) { // we can read the External Storage... list=getAllFilesOfDir(Environment.getExternalStorageDirectory()); }*/ pathTextView.setText(root_sd); file = new File( root_sd ) ; list = file.listFiles(new AudioFilter()); Log.e("Size of list ","" +list.length); //LoadDirectory(root_sd); for( int i=0; i< list.length; i++) { String name=list[i].getName(); int count = getAudioFileCount(list[i].getAbsolutePath()); Log.e("Count : "+count, list[i].getAbsolutePath()); if(count!=0) myList.add(name); /*int count=getAllFilesOfDir(list[i]); Log.e("Songs count ",""+count); */ } listView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, myList )); listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) { File temp_file = new File( file, myList.get( position ) ); if( !temp_file.isFile()) { //LoadDirectory(myList.get( position )); file = new File( file, myList.get( position )); File list[] = file.listFiles(new AudioFilter()); myList.clear(); for( int i=0; i< list.length; i++) { String name=list[i].getName(); int count = getAudioFileCount(list[i].getAbsolutePath()); Log.e("Count : "+count, list[i].getAbsolutePath()); if(count!=0) myList.add(name); /*int count=getAllFilesOfDir(list[i]); Log.e("Songs count ",""+count); if(count!=0) myList.add(name);*/ } pathTextView.setText( file.toString()); //Toast.makeText(getApplicationContext(), file.toString(), Toast.LENGTH_LONG).show(); listView.setAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, myList )); } } }); } private int getAudioFileCount(String dirPath) { String selection =MediaStore.Audio.Media.DATA +" like ?"; String[] projection = {MediaStore.Audio.Media.DATA}; String[] selectionArgs={dirPath+"%"}; Cursor cursor = this.managedQuery( MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, projection, selection, selectionArgs, null); return cursor.getCount(); } @Override public void onBackPressed() { try { String parent = file.getParent().toString(); file = new File( parent ) ; File list[] = file.listFiles(new AudioFilter()); myList.clear(); for( int i=0; i< list.length; i++) { String name=list[i].getName(); int count = getAudioFileCount(list[i].getAbsolutePath()); Log.e("Count : "+count, list[i].getAbsolutePath()); if(count!=0) myList.add(name); /*int count=getAllFilesOfDir(list[i]); Log.e("Songs count ",""+count); if(count!=0)*/ } pathTextView.setText(parent); // Toast.makeText(getApplicationContext(), parent, Toast.LENGTH_LONG).show(); listView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, myList )); } catch (Exception e) { finish(); } } // class to limit the choices shown when browsing to SD card to media files public class AudioFilter implements FileFilter { // only want to see the following audio file types private String[] extension = {".aac", ".mp3", ".wav", ".ogg", ".midi", ".3gp", ".mp4", ".m4a", ".amr", ".flac"}; @Override public boolean accept(File pathname) { // if we are looking at a directory/file that's not hidden we want to see it so return TRUE if ((pathname.isDirectory() || pathname.isFile()) && !pathname.isHidden()){ return true; } // loops through and determines the extension of all files in the directory // returns TRUE to only show the audio files defined in the String[] extension array for (String ext : extension) { if (pathname.getName().toLowerCase().endsWith(ext)) { return true; } } return false; } } } 

Archivo .xml:

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:textSize="21sp" android:typeface="monospace" android:id="@+id/path" android:layout_width="fill_parent" android:layout_height="100dp" android:layout_margin="10dp" android:gravity="bottom" android:text="PATH : " /> <View android:layout_width="fill_parent" android:layout_height="2dp" android:background="#111111" /> <ListView android:id="@+id/pathlist" android:layout_width="fill_parent" android:layout_height="fill_parent" > </ListView> </LinearLayout> 

Permisos en el archivo manifiest:

  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 

Esta es mi solución.

1. Cursor mCursor = getContentResolver().query( MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, ... todos los archivos de audio ex) Cursor mCursor = getContentResolver().query( MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, ...
2. Declarar nuevo arreglo
3. lazo
4. Nombre de la carpeta = MediaStore.Audio.Media.DATA - MediaStore.Audio.Media.DISPLAY_NAME
5. Coloque el nuevo en la variable de matriz
6. Array es una lista de carpetas distinta

Esto puede funcionar: – use el método walkDir para buscar todos los archivos de música en su ubicación de almacenamiento, entonces usted podría obtener la ruta de acceso de cada archivo del método getPath () – use subsString () método con todos los archivos de ruta para obtener el nombre de la carpeta de nivel 1 – Almacenar todo el nombre de la carpeta en un ArrayList el uso de Hashset para eliminar el nombre de la carpeta duplicada (con la condición)