获取sd的音乐文件

 

获取sd卡的音乐文件的方法

public class Music {
    public static ArrayList<MusicMessage> Music(Context context) {
        ContentResolver resolver = context.getContentResolver();
        // 内容提供者访问MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
        Cursor cursor = resolver.query(
                MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null, null,
                null);
        ArrayList<MusicMessage> list = new ArrayList<MusicMessage>();
        while (cursor.moveToNext()) {
            // 名字
            String name = cursor.getString(cursor
                    .getColumnIndex(Audio.Media.TITLE));
            // 专辑名
            String album = cursor.getString(cursor
                    .getColumnIndexOrThrow(Audio.Media.ALBUM));
            // 歌手名
            String artist = cursor.getString(cursor
                    .getColumnIndexOrThrow(Audio.Media.ARTIST));
            // URI歌曲文件存放路径
            String path = cursor.getString(cursor
                    .getColumnIndexOrThrow(Audio.Media.DATA));
            // 歌曲文件播放时间长度
            int duration = cursor.getInt(cursor
                    .getColumnIndexOrThrow(Audio.Media.DURATION));
            // 音乐文件大小
            int size = cursor.getInt(cursor
                    .getColumnIndexOrThrow(Audio.Media.SIZE));
            list.add(new MusicMessage(false, name, album, artist, path,
                    duration, size));
        }
        return list;
    }
}

vo类

public class MusicMessage {

    public MusicMessage(boolean b, String name, String album, String artist,
            String path, int duration, int size) {
        super();
        this.b = b;
        this.name = name;
        this.album = album;
        this.artist = artist;
        this.path = path;
        this.duration = duration;
        this.size = size;
    }
    @Override
    public String toString() {
        return "MusicMessage [b=" + b + ", name=" + name + ", album=" + album
                + ", artist=" + artist + ", path=" + path + ", duration="
                + duration + ", size=" + size + "]";
    }
    public boolean isB() {
        return b;
    }
    public void setB(boolean b) {
        this.b = b;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getAlbum() {
        return album;
    }
    public void setAlbum(String album) {
        this.album = album;
    }
    public String getArtist() {
        return artist;
    }
    public void setArtist(String artist) {
        this.artist = artist;
    }
    public String getPath() {
        return path;
    }
    public void setPath(String path) {
        this.path = path;
    }
    public int getDuration() {
        return duration;
    }
    public void setDuration(int duration) {
        this.duration = duration;
    }
    public int getSize() {
        return size;
    }
    public void setSize(int size) {
        this.size = size;
    }
    public boolean b;
    public String name;
    public String album;
    public String artist;
    public String path;
    public int duration;
    public int size;

}

调用方法

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        List<MusicMessage> list = Music.Music(MainActivity.this);
        System.out.println(list.size());
        System.out.println(list.toString());
        ListView listview = (ListView) findViewById(R.id.listview);
        listview.setAdapter(new Myadapter(list, MainActivity.this));

    }

}