视频工具类

1）获取本地视频的时长：

 private int getVideoDuration(String path) {
        MediametadataRetriever media = new MediametadataRetriever();
        media.setDataSource(path);
        String duration = media.extractmetadata(MediametadataRetriever.metaDATA_KEY_DURATION);
        return Integer.parseInt(duration);
    }

2）打开本地视频列表：

Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Video.Media.EXTERNAL_CONTENT_URI);
                intent.setType("video/*");
                startActivityForResult(intent, RECORD_SYSTEM_ALBUM);