Android获取视频音频的时长的方法

android当中获取视频音频的时长，我列举了三种。
1：获取视频URI后获取cursor

cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DURATION));

 

2：根据MediaPlayer获取：

MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(url);
mediaPlayer.prepare();
mediaPlayer.getDuration();

 

3:采用MediaMetadataRetriever的方式：

    public static String getRingDuring(String mUri){
String duration=null;
 android.media.MediaMetadataRetriever mmr = new android.media.MediaMetadataRetriever();

 try {
if (mUri != null) {
 HashMap<String, String> headers=null;
if (headers == null) {
 headers = new HashMap<String, String>();
 headers.put("User-Agent", "Mozilla/5.0 (Linux; U; Android 4.4.2; zh-CN; MW-KW-001 Build/JRO03C) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 UCBrowser/1.0.0.001 U4/0.8.0 Mobile Safari/533.1");
 }
 mmr.setDataSource(mUri, headers);
 }

duration = mmr.extractMetadata(android.media.MediaMetadataRetriever.METADATA_KEY_DURATION);
 } catch (Exception ex) {
 } finally {
 mmr.release();
 }
 LogUtil.e("ryan","duration "+duration);
return duration;
 }