獲取SD卡中的音樂檔案
阿新 • • 發佈:2018-12-17
小編最近在搞一個音樂播放器App,練練手; 首先遇到一個問題,怎麼獲取本地的音樂檔案?
/**
* 獲取SD卡中的音樂檔案
*
* @param context
* @return
*/
public static ArrayList<Music> getMusicFile(Context context) {
//ArrayList<Music>存放音樂
ArrayList<Music> MusicFiles = new ArrayList<>();
//查詢媒體資料庫
ContentResolver resolver = context.getContentResolver();
/**
* Uri:這個Uri代表要查詢的資料庫名稱加上表的名稱。
這個Uri一般都直接從MediaStore裡取得,例如我要取所有歌的資訊,
就必須利用MediaStore.Audio.Media. EXTERNAL _CONTENT_URI這個Uri。
*
*/
Cursor cursor = resolver.query (MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
null, null, null, MediaStore.Audio.Media.DEFAULT_SORT_ORDER);
//遍歷媒體資料庫
if (cursor.moveToFirst()) {
while (!cursor.isAfterLast()) {
//歌曲編號MediaStore.Audio.Media._ID
int id = cursor.getInt (cursor.getColumnIndexOrThrow(MediaStore.Audio.Media._ID));
//歌曲標題
String title = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE));
//歌曲的專輯名MediaStore.Audio.Media.ALBUM
String album = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM));
//歌曲的歌手名MediaStore.Audio.Media.ARTIST
String artist = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST));
//歌曲檔案的路徑MediaStore.Audio.Media.DATA
String url = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));
//歌曲的總播放時長MediaStore.Audio.Media.DURATION
int duration = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION));
//歌曲檔案的大小MediaStore.Audio.Media.SIZE
long size = cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE));
if (size > 1024 * 800) { //是否大於800K
if (title.equals("<unknown>") || title.equals("")) {
title = "未知";
}
if ("<unknown>".equals(artist) || "".equals(artist)) {
artist = "未知";
}
Music music = new Music(id, title, artist,
url, album, duration, size);
MusicFiles.add(music);
}
cursor.moveToNext();
}
}
return MusicFiles;
}
Music類:
public class Music {
private int id;
private String name;
private String singerName;
private String url;
private String album;
private int totalTime;
private long size;
public Music(int id, String name, String singerName,
String url, String album, int totalTime, long size) {
this.id = id;
this.name = name;
this.singerName = singerName;
this.url = url;
this.album = album;
this.totalTime = totalTime;
this.size = size;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSingerName() {
return singerName;
}
public void setSingerName(String singerName) {
this.singerName = singerName;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getAlbum() {
return album;
}
public void setAlbum(String album) {
this.album = album;
}
public int getTotalTime() {
return totalTime;
}
public void setTotalTime(int totalTime) {
this.totalTime = totalTime;
}
public long getSize() {
return size;
}
public void setSize(long size) {
this.size = size;
}
}