根据其他博客的一些说法,总结两种获取本地视频缩略图和时长的方法:
一.利用contentprovider去查询视频文件缩略图和时长,优点是速度快,缺点:有时候获取不到所有视频的缩略图。
public List<VideoBean> getVideoList(Context context) { List<VideoBean> sysVideoList = new ArrayList<>(); String[] thumbColumns = {MediaStore.Video.Thumbnails.DATA, MediaStore.Video.Thumbnails.VIDEO_ID}; String[] mediaColumns = {MediaStore.Video.Media._ID, MediaStore.Video.Media.DATA, MediaStore.Video.Media.DURATION}; Cursor cursor = context.getContentResolver().query(MediaStore.Video.Media .EXTERNAL_CONTENT_URI, mediaColumns, null, null, null); if (cursor == null) { return sysVideoList; } if (cursor.moveToFirst()) { do { VideoBean info = new VideoBean(); int id = cursor.getInt(cursor .getColumnIndex(MediaStore.Video.Media._ID)); Cursor thumbCursor = context.getContentResolver().query( MediaStore.Video.Thumbnails.EXTERNAL_CONTENT_URI, thumbColumns, MediaStore.Video.Thumbnails.VIDEO_ID + "=" + id, null, null); if (thumbCursor.moveToFirst()) { info.setThumbPath(thumbCursor.getString(thumbCursor .getColumnIndex(MediaStore.Video.Thumbnails.DATA))); } info.setPath(cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media .DATA))); info.setDuration(cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Video .Media.DURATION))); sysVideoList.add(info); } while (cursor.moveToNext()); if(cursor!=null){ cursor.close(); } } return sysVideoList; }
二.利用MediaMetadataRetriever,根据文件路径获取缩略图和时长。优点:只要有路径,就可以获取到。缺点:获取效率不高,耗时长,需要自己做缓存,不然每次加载去获取,用户体验不好。
//根据路径得到视频缩略图 private Bitmap getVideoPhoto(String videoPath) { media.setDataSource(videoPath); Bitmap bitmap = media.getFrameAtTime(); return bitmap; } //获取视频总时长 private int getVideoDuration(String path){ media.setDataSource(path); String duration = media.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION); // return Integer.parseInt(duration); }
VideoBean.java如下:
public class VideoBean { String thumbPath; String path; int duration; Bitmap bitmap; public Bitmap getBitmap() { return bitmap; } public void setBitmap(Bitmap bitmap) { this.bitmap = bitmap; } public String getThumbPath() { return thumbPath; } public void setThumbPath(String thumbPath) { this.thumbPath = thumbPath; } 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; } }