我正在检索视频缩略图并将其显示在recycledview的imageview中,我面临的问题是图像在向上/向下滚动时变得错位并消失。当我使用runnable类时,Recyclarview会冻结。
private static Bitmap retrieveVideoFrameFromVideo(String videoPath) {
Bitmap bitmap = null;
MediaMetadataRetriever mediaMetadataRetriever = null;
try {
mediaMetadataRetriever = new MediaMetadataRetriever();
if (Build.VERSION.SDK_INT >= 14) {
mediaMetadataRetriever.setDataSource(videoPath, new HashMap<String, String>());
} else {
mediaMetadataRetriever.setDataSource(videoPath);
}
// mediaMetadataRetriever.setDataSource(videoPath);
bitmap = mediaMetadataRetriever.getFrameAtTime();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (mediaMetadataRetriever != null) {
mediaMetadataRetriever.release();
}
}
return bitmap;
}
@Override void bindData(RecyclerView.ViewHolder holder, final MediaResponse data) {
final PhotoHolder photoHolder = (PhotoHolder) holder;
photoHolder.mTitle.setText(BasicUtils.removeDoubleQuotes(data.getTitle()));
photoHolder.mPostedBy.setText(data.getPostedby());
photoHolder.upvote.setText(String.valueOf(data.getLikes()));
photoHolder.date.setText(
BasicUtils.parseDate(data.getDatetime(), AppConstantsUtils.FROM_DATE_FORMAT,
AppConstantsUtils.TO_DATE_FORMAT));
new BackTask(photoHolder.mMediaPic).execute(
AppConstantsUtils.BASE_URL + data.getMedia());
}
private class BackTask extends AsyncTask<String, Void, Bitmap> {
private ImageView imageView;
BackTask(ImageView imageView) {
this.imageView = imageView;
}
@Override protected Bitmap doInBackground(String... params) {
// return retrieveVideoFrameFromVideo(params[0]);
Log.d("URLHARRY",params[0]);
// return ThumbnailUtils.createVideoThumbnail(params[0], MediaStore.Video.Thumbnails.MINI_KIND );
return retrieveVideoFrameFromVideo(params[0]);
}
@Override protected void onPostExecute(Bitmap bitmap) {
super.onPostExecute(bitmap);
if(bitmap!=null) {
imageView.setImageBitmap(bitmap);
}
else{
imageView.setImageBitmap(null);
ToastUtils.showToast(context,"Hai");
}
}
答案 0 :(得分:1)
在bindData
方法中,您需要添加此行
photoHolder.setIsRecyclable(false);
答案 1 :(得分:1)
尝试使用picasso加载RecyclerView
内的图片。您面临的问题是因为recyclerview回收了onBindView
方法中的视图。因此,您需要保持对这些对象的一周引用。哪个毕加索做得很好。 (它还会回收你的位图:))
答案 2 :(得分:1)
在Viewholder中使用AsynTask
new AsyncTask<String, String, String>() {
Bitmap bitmapVideo;
String location;
@Override
protected String doInBackground(String... strings) {
try {
//Your method call here
bitmapVideo = retrieveVideoFrameFromVideo(strings[0]);
location=strings[0];
// addBitmapToMemoryCache(location, bitmapVideo);
} catch (Throwable throwable) {
throwable.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String id) {
super.onPostExecute(id);
if (bitmapVideo != null) {
//Load your bitmap here
photoHolder.mMediaPic.setImageBitmap(bitmapVideo);
addBitmapToMemoryCache(location, bitmapVideo);
} else {
Bitmap largeIcon = BitmapFactory.decodeResource(context.getResources(), R.drawable.ananda);
photoHolder.mMediaPic.setImageBitmap(largeIcon);
addBitmapToMemoryCache(location, largeIcon);
}
}
}.execute(AppConstantsUtils.BASE_URL + data.getMedia());
答案 3 :(得分:0)
你可以使用毕加索下载图像fromurl并在recyclelerview项目下将其设置在图像中。
Picasso.with(上下文) .load(URL) .placeholder(R.drawable.user_placeholder) .error(R.drawable.user_placeholder_error) .into(ImageView的);