PlaylistSong.java

package com.nf2m.model;


import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

public class PlaylistSong extends Library {
    private static final String VOLUME_EXTERNAL = "external";
    private final int playlist_id;

    public PlaylistSong(@NonNull Context context, int playlist_id) {
        this.playlist_id = playlist_id;
        ContentResolver resolver = context.getContentResolver();
        setResolver(resolver);
        setUri(getSongUri());
        setSortOrder(sortSongs());
        setContext(context);
        Cursor songCursor = initCursor(getSongUri(), null, null, null, sortSongs());
        setCursor(songCursor);
    }

    // songUri değişkeni tanımlanır.
    private Uri getSongUri() {

        return MediaStore.Audio.Playlists.Members.getContentUri(VOLUME_EXTERNAL, playlist_id);
    }

    @NonNull
    private String sortSongs() {
        return MediaStore.Audio.Playlists.Members.PLAY_ORDER + " COLLATE UNICODE";
    }

    @Nullable
    @Override
    public String details() {

        return null;
    }
}