Java tutorial
//package com.java2s; /* * FFmpegMediaPlayer: A unified interface for playing audio files and streams. * * Copyright 2014 William Seemann * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import android.content.ContentResolver; import android.content.Context; import android.database.Cursor; import android.net.Uri; import android.provider.MediaStore; public class Main { public static long[] getAllSongs(Context context) { Cursor c = query(context, MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, new String[] { MediaStore.Audio.Media._ID }, MediaStore.Audio.Media.IS_MUSIC + "=1", null, null); try { if (c == null || c.getCount() == 0) { return null; } int len = c.getCount(); long[] list = new long[len]; for (int i = 0; i < len; i++) { c.moveToNext(); list[i] = c.getLong(0); } return list; } finally { if (c != null) { c.close(); } } } 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; } } 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); } }