How can I show Video List properly? - performance

Question

I've been searching everywhere for the solution, but it has come to a dead end.
Please help!
I record and save the video as the follow:
File DirectoryFile = new File(VideoPath);
recorder.setOutputFile(DirectoryFile.getAbsolutePath());
I load all the videos and set the ListView adapter from the userPath as follow:
private File[] getNewImageFilesWithFilters() {
File directory = new File(UserSavedDirectoryPATH);
return directory.listFiles(new FilenameFilter() {
public boolean accept(File dir, String name) {
return name.toLowerCase(Locale.getDefault()).endsWith(".mp4")
|| name.toLowerCase(Locale.getDefault()).endsWith(".mkv");
}
});
}
public void LoadListView() {
for (File file : listFile){
mVideoListViewObject = new VideoListViewObject();
mVideoListViewObject.setName(file.getName());
mVideoListViewObject.setVideoUrl(file.getAbsolutePath());
VideoListViewObject_List.add(mVideoListViewObject);
}
mVideoListViewAdapter = new VideoListAdapter(this, VideoListViewObject_List);
mListView.setAdapter(mVideoListViewAdapter);
}
The ListView Adapter:
public class VideoListAdapter extends BaseAdapter {
private List<VideoListViewObject> VideoObjectList;
private Context mContext;
public VideoListAdapter(Context context, List<VideoListViewObject> newList){
this.mContext = context;
this.VideoObjectList = newList;
}
#Override
public int getCount() {
return VideoObjectList.size();
}
#Override
public VideoListViewObject getItem(int position) {
return VideoObjectList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = new ViewHolder();
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = inflater.inflate(R.layout.listview_layout, parent, false);
viewHolder.imageView = (ImageView)convertView.findViewById(R.id.ListViewImage);
viewHolder.layout = (RelativeLayout)convertView.findViewById(R.id.ListViewLayout);
convertView.setTag(viewHolder);
}
else
{
viewHolder = (ViewHolder)convertView.getTag();
}
Bitmap bmThumbnail = ThumbnailUtils.createVideoThumbnail(VideoObjectList.get(position).getVideoUrl(),Thumbnails.MICRO_KIND);
viewHolder.imageView.setImageBitmap(bmThumbnail);
The problem is the list is slow to load, especially when there are a lot of videos.
This causes my VideoaAtivity to start very slow.
I love Piscasso and Universal Image Loader, but they only support images.
Does anyone know a better solution or a library that would help with the performance?
Thank you very much.

Answer 1

I just modified my own application to do similar logic to pre-create the thumbnails which made the list scroll very fast at the start, Add the thumbnail bitmap to the videoListViewObject and create the thumbnail
when loading the video list. this way you do not have to create it every time getView is called in your adapter.
public class VideoListViewObject{
private Bitmap bitmap = null;
............................
public void setBitmap(Bitmap bitmap)
{
this.bitmap = bitmap;
}
public Bitmap getBitmap()
{
return this.bitmap;
}
}
public void LoadListView() {
for (File file : listFile){
mVideoListViewObject = new VideoListViewObject();
mVideoListViewObject.setName(file.getName());
mVideoListViewObject.setVideoUrl(file.getAbsolutePath());
Bitmap bmThumbnail = ThumbnailUtils.createVideoThumbnail(VideoObjectList.get(position).getVideoUrl(),Thumbnails.MICRO_KIND);
mVideoListViewObject.setBitmap(bmThumbnail);
VideoListViewObject_List.add(mVideoListViewObject);
}
mVideoListViewAdapter = new VideoListAdapter(this, VideoListViewObject_List);
mListView.setAdapter(mVideoListViewAdapter);
}
then change your BaseAdapter code to only create the thumbnail if it is null,
public class VideoListAdapter extends BaseAdapter {
private List<VideoListViewObject> VideoObjectList;
private Context mContext;
public VideoListAdapter(Context context, List<VideoListViewObject> newList){
this.mContext = context;
this.VideoObjectList = newList;
}
#Override
public int getCount() {
return VideoObjectList.size();
}
#Override
public VideoListViewObject getItem(int position) {
return VideoObjectList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = new ViewHolder();
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = inflater.inflate(R.layout.listview_layout, parent, false);
viewHolder.imageView = (ImageView)convertView.findViewById(R.id.ListViewImage);
viewHolder.layout = (RelativeLayout)convertView.findViewById(R.id.ListViewLayout);
convertView.setTag(viewHolder);
}
else
{
viewHolder = (ViewHolder)convertView.getTag();
}
VideoListViewObject mVideoListViewObject = getItem(position);
Bitmap bmThumbnail = mVideoListViewObject.getBitmap();
if(bmThumbnail==null)
{
bmThumbnail = ThumbnailUtils.createVideoThumbnail(VideoObjectList.get(position).getVideoUrl(),Thumbnails.MICRO_KIND);
}
viewHolder.imageView.setImageBitmap(bmThumbnail);