1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.music; 18 19 import android.database.Cursor; 20 import android.provider.MediaStore; 21 import android.widget.AlphabetIndexer; 22 23 /** 24 * Handles comparisons in a different way because the Album, Song and Artist name 25 * are stripped of some prefixes such as "a", "an", "the" and some symbols. 26 * 27 */ 28 class MusicAlphabetIndexer extends AlphabetIndexer { 29 MusicAlphabetIndexer(Cursor cursor, int sortedColumnIndex, CharSequence alphabet)30 public MusicAlphabetIndexer(Cursor cursor, int sortedColumnIndex, CharSequence alphabet) { 31 super(cursor, sortedColumnIndex, alphabet); 32 } 33 34 @Override compare(String word, String letter)35 protected int compare(String word, String letter) { 36 String wordKey = MediaStore.Audio.keyFor(word); 37 String letterKey = MediaStore.Audio.keyFor(letter); 38 if (wordKey.startsWith(letter)) { 39 return 0; 40 } else { 41 return wordKey.compareTo(letterKey); 42 } 43 } 44 } 45