write Playlist to Context - Android android.content

Android examples for android.content:ContentResolver

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Description

write Playlist to Context

Demo Code

import java.util.ArrayList;

import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.provider.MediaStore;

public class Main {

  public static void writePlaylist(Context context, String playlistName, ArrayList<Integer> trackIds) {
    ContentResolver resolver = context.getContentResolver();
    int playlistId = idForplaylist(context, playlistName);
    Uri uri;//from  www  .j  a  v  a  2s .com
    if (playlistId == -1) {
      ContentValues values = new ContentValues(1);
      values.put(MediaStore.Audio.Playlists.NAME, playlistName);
      uri = resolver.insert(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, values);
      playlistId = idForplaylist(context, playlistName);
    } else {
      uri = MediaStore.Audio.Playlists.Members.getContentUri("external", playlistId);
    }

    // Add all the new tracks to the playlist.
    int size = trackIds.size();
    ContentValues values[] = new ContentValues[size];
    for (int k = 0; k < size; ++k) {
      values[k] = new ContentValues();
      values[k].put(MediaStore.Audio.Playlists.Members.PLAY_ORDER, k);
      values[k].put(MediaStore.Audio.Playlists.Members.AUDIO_ID, trackIds.get(k));
    }

    resolver.bulkInsert(uri, values);
  }

  public static int idForplaylist(Context context, String name) {
    Cursor c = query(context, MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI,
        new String[] { MediaStore.Audio.Playlists._ID }, MediaStore.Audio.Playlists.NAME + "=?", new String[] { name },
        MediaStore.Audio.Playlists.NAME);
    return intFromCursor(c);
  }

  public static Cursor query(Context context, Uri uri, String[] projection, String selection, String[] selectionArgs,
      String sortOrder, int limit) {
    try {
      ContentResolver resolver = context.getContentResolver();
      if (resolver == null) {
        return null;
      }
      if (limit > 0) {
        uri = uri.buildUpon().appendQueryParameter("limit", "" + limit).build();
      }
      return resolver.query(uri, projection, selection, selectionArgs, sortOrder);
    } catch (UnsupportedOperationException ex) {
      return null;
    }
  }

  private static int intFromCursor(Cursor c) {
    int id = -1;
    if (c != null) {
      c.moveToFirst();
      if (!c.isAfterLast()) {
        id = c.getInt(0);
      }
    }
    c.close();
    return id;
  }

  public static Cursor query(Context context, Uri uri, String[] projection, String selection, String[] selectionArgs,
      String sortOrder) {
    return query(context, uri, projection, selection, selectionArgs, sortOrder, 0);
  }
}

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