如何在Android中从MediaStore.Audio.Playlists删除播放列表

如果可能，如何以编程方式从MediaStore.Audio.Playlists.EXTERNAL\u CONTENT\u URI中删除播放列表

我使用以下代码删除特定的播放列表。当然，它只需要播放列表id

private void deletePlaylist(String selectedplaylist) 
{
// // Log.i(TAG, "deletePlaylist");
String playlistid = getPlayListId(selectedplaylist);
ContentResolver resolver = this.getContentResolver();
String where = MediaStore.Audio.Playlists._ID + "=?";
String[] whereVal = {playlistid}; 
resolver.delete(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, where, whereVal);
Toast toast = Toast.makeText(this,selectedplaylist + " Deleted", Toast.LENGTH_SHORT);
    toast.show();   
return ;        
}

我已经创建了一个小应用程序，你可以在其中看到这一点。

如您所见，它首先获取playlid。现在我只有播放列表名。 下面是我的代码以获取id

    public String getPlayListId(String playlist )

    {

    //  read this record and get playlistid

    Uri newuri =MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI;

    final String playlistid = MediaStore.Audio.Playlists._ID;

    final String playlistname = MediaStore.Audio.Playlists.NAME;

    String where = MediaStore.Audio.Playlists.NAME + "=?";

    String[] whereVal = {playlist}; 

    String[] projection = {playlistid, playlistname};

    ContentResolver resolver = getContentResolver();

    Cursor record = resolver.query(newuri , projection, where, whereVal, null);

    int recordcount = record.getCount();

    String foundplaylistid = "";

    if (recordcount > 0)

    {
    record.moveToFirst();

    int idColumn = record.getColumnIndex(playlistid);

    foundplaylistid = record.getString(idColumn);

    record.close();
    }

    return foundplaylistid;
    }

---

我使用以下代码删除特定的播放列表。当然，它只需要播放列表id

private void deletePlaylist(String selectedplaylist) 
{
// // Log.i(TAG, "deletePlaylist");
String playlistid = getPlayListId(selectedplaylist);
ContentResolver resolver = this.getContentResolver();
String where = MediaStore.Audio.Playlists._ID + "=?";
String[] whereVal = {playlistid}; 
resolver.delete(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, where, whereVal);
Toast toast = Toast.makeText(this,selectedplaylist + " Deleted", Toast.LENGTH_SHORT);
    toast.show();   
return ;        
}

我已经创建了一个小应用程序，你可以在其中看到这一点。

如您所见，它首先获取playlid。现在我只有播放列表名。 下面是我的代码以获取id

    public String getPlayListId(String playlist )

    {

    //  read this record and get playlistid

    Uri newuri =MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI;

    final String playlistid = MediaStore.Audio.Playlists._ID;

    final String playlistname = MediaStore.Audio.Playlists.NAME;

    String where = MediaStore.Audio.Playlists.NAME + "=?";

    String[] whereVal = {playlist}; 

    String[] projection = {playlistid, playlistname};

    ContentResolver resolver = getContentResolver();

    Cursor record = resolver.query(newuri , projection, where, whereVal, null);

    int recordcount = record.getCount();

    String foundplaylistid = "";

    if (recordcount > 0)

    {
    record.moveToFirst();

    int idColumn = record.getColumnIndex(playlistid);

    foundplaylistid = record.getString(idColumn);

    record.close();
    }

    return foundplaylistid;
    }

---

要重命名，请执行以下操作：

private final Uri uri = MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI;

public void renamePlaylist(Context context, String newplaylist, long playlist_id) {
    ContentResolver resolver = context.getContentResolver();
    ContentValues values = new ContentValues();
    String where = MediaStore.Audio.Playlists._ID + " =? ";
    String[] whereVal = { Long.toString(playlist_id) };
    values.put(MediaStore.Audio.Playlists.NAME, newplaylist);
    resolver.update(uri, values, where, whereVal);
}

---

要重命名，请执行以下操作：

private final Uri uri = MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI;

public void renamePlaylist(Context context, String newplaylist, long playlist_id) {
    ContentResolver resolver = context.getContentResolver();
    ContentValues values = new ContentValues();
    String where = MediaStore.Audio.Playlists._ID + " =? ";
    String[] whereVal = { Long.toString(playlist_id) };
    values.put(MediaStore.Audio.Playlists.NAME, newplaylist);
    resolver.update(uri, values, where, whereVal);
}

---

非常感谢。这正是我所需要的。：）嗨，提奥，我如何修改上面的代码来重命名我的播放列表？提前感谢我现在正在度假，但下周将发布代码9.3.15谢谢。这正是我所需要的。：）嗨，提奥，我如何修改上面的代码来重命名我的播放列表？提前谢谢，我现在正在holidsy上，但下周9.3.15将发布代码