我正在尝试获取特定专辑的歌曲，所以我在Stack Overflow上尝试了一些答案，但答案没有用。我将它与ID进行了比较，但它对我没有帮助。所以，请帮帮我。我该怎么做呢？我正在列出专辑，但是当我点击那些时，我会收到模拟器上的所有歌曲。那么我如何根据专辑分开？
public class albumSongs extends AppCompatActivity implements SearchView.OnQueryTextListener {
ArrayList<albumInfo>albumSongList=new ArrayList<>();
RecyclerView recyclerView2;
public albumsongAdapter albumsongAdapter;
String albumid;
String track_name;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_album_songs);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("try");
getSupportActionBar().setDisplayShowTitleEnabled(true);
recyclerView2 = (RecyclerView) findViewById(R.id.recyclerView2);
recyclerView2.setHasFixedSize(true);
albumsongAdapter = new albumsongAdapter(albumSongList,this);
SearchView searchView=(SearchView)findViewById(R.id.search);
recyclerView2.setAdapter(albumsongAdapter);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(recyclerView2.getContext(),
linearLayoutManager.getOrientation());
recyclerView2.setLayoutManager(linearLayoutManager);
recyclerView2.addItemDecoration(dividerItemDecoration);
getSongsPerAlbum("");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
final MenuItem item = menu.findItem(R.id.search_view);
final SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(this);
searchView.setQueryHint("search songs");
MenuItemCompat.setOnActionExpandListener(item,new MenuItemCompat.OnActionExpandListener() {
@Override
public boolean onMenuItemActionExpand(MenuItem menuItem) {
// Return true to allow the action view to expand
return true;
}
@Override
public boolean onMenuItemActionCollapse(MenuItem menuItem) {
// When the action view is collapsed, reset the query
albumsongAdapter.setSearchResult(albumSongList);
// Return true to allow the action view to collapse
return true;
}
});
return true;
}
public boolean onQueryTextSubmit(String query) {
return false;
}
public boolean onQueryTextChange(String newText) {
final List<albumInfo> filteredModelList = filter(albumSongList, newText);
albumsongAdapter.setSearchResult(filteredModelList);
return true;
}
private List<albumInfo> filter(ArrayList<albumInfo> models, String query) {
query = query.toLowerCase();
final List<albumInfo> filteredModelList = new ArrayList<>();
for (albumInfo model : models) {
final String text = model.getX().toLowerCase();
if (text.contains(query)) {
filteredModelList.add(model);
}
}
return filteredModelList;
}
public void getSongsPerAlbum(String AlbumId) {
final Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
final String track_id = MediaStore.Audio.Media._ID;
final String track_no = MediaStore.Audio.Media.TRACK;
track_name = MediaStore.Audio.Media.TITLE;
final String artist = MediaStore.Audio.Media.ARTIST;
final String duration = MediaStore.Audio.Media.DURATION;
final String album = MediaStore.Audio.Media.ALBUM;
albumid = MediaStore.Audio.Media.ALBUM_ID;
final String composer = MediaStore.Audio.Media.COMPOSER;
final String year = MediaStore.Audio.Media.YEAR;
final String path = MediaStore.Audio.Media.DATA;
final String date_added = MediaStore.Audio.Media.DATE_ADDED;
String[] columns = new String[]{
track_id,
track_no,
track_name,
artist,
duration,
album,
albumid,
composer,
year,
path,
date_added
};
// Get all tracks if no album id
Cursor csr;
if (AlbumId == null || AlbumId.length() < 1) {
csr = this.getContentResolver().query(uri, columns,null,null,track_no);
} else {
// Doesn't work think media has to be scanned first before albums are generated
csr = this.getContentResolver().query(uri, columns,album + "=?",new String[]{AlbumId},track_no);
}
for (String s: csr.getColumnNames()
) {
Log.d("SONGCOLUMN","Column = " + s);
}
while (csr.moveToNext()) {
String id = (csr.getString(csr.getColumnIndex(track_name)));
String thisalbumId=(csr.getString(csr.getColumnIndex(path)));
String v = (csr.getString(csr.getColumnIndex(albumid)));
Log.d("SONG","Name of Song is " + csr.getString(csr.getColumnIndex(track_no)) +
" from Album " + csr.getString(csr.getColumnIndex(albumid)));
albumInfo s = new albumInfo(id, v, thisalbumId);
albumSongList.add(s);
}
csr.close();
// recyclerView2.setAdapter(albumsongAdapter);
}
}
答案 0 :(得分：0)
public void songs()
{
Uri uri=MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI;
String[] columns = { android.provider.MediaStore.Audio.Albums._ID,
android.provider.MediaStore.Audio.Albums.ALBUM };
Cursor cursor =getApplicationContext().getContentResolver().
query(uri, columns, null,
null, null);
if (cursor != null && cursor.moveToFirst()) {
do {
Log.v("Vipul",
cursor.getString(cursor
.getColumnIndex(MediaStore.Audio.Albums.ALBUM)));
v=cursor.getString(cursor
.getColumnIndex(MediaStore.Audio.Albums.ALBUM));
} while (cursor.moveToNext());
}
// I want to list down song in album Rolling Papers (Deluxe Version)
String[] column = { MediaStore.Audio.Media.DATA,
MediaStore.Audio.Media.ALBUM_ID, MediaStore.Audio.Media.TITLE,
MediaStore.Audio.Media.DISPLAY_NAME,
MediaStore.Audio.Media.MIME_TYPE, };
String where = android.provider.MediaStore.Audio.Media.ALBUM + "=?";
Log.e("syn",v);
String whereVal[] = {v};
String orderBy = android.provider.MediaStore.Audio.Media.TITLE;
cursor =getApplicationContext().getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
column,where,whereVal, orderBy);
if (cursor != null && cursor.moveToFirst() ) {
do {
Log.v("Vipul",
cursor.getString(cursor
.getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME)));
String name=cursor.getString(cursor
.getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME));
String art=cursor.getString(cursor
.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID));
String path=cursor.getString(cursor
.getColumnIndex(MediaStore.Audio.Media.DATA));
albumInfo s = new albumInfo(name,art,path); // EXCLUDED
albumSongList.add(s);
} while (cursor.moveToNext());
}
}