outofmemory异常 - for adapter.notifiydatasetchanged()加载毕加索图像时

Question

我在加载毕加索时面临外形异常。我正在使用Okhttp创建毕加索建造者，并创建了毕加索Singleton类来缓存图像。

方案：我有100多个图像提要要加载。我在集合中获取图像，并且每组都有25个图像URL，我将使用毕加索设置。我正在使用recyclerview，每当新的图像集中时，我都在调用Adapter.notifyDataSetchanged（）。我正在加载第一组 - 对于第二组和第三组，进行修改以获取下一组并添加到现有列表和调用-Adapter.notifyDataSetchanged（）时，没有问题。对于第三组，当我调用Adapter.notifyDataSetchanged（）应用程序使用OutOfMemoryException

崩溃时

但是

当我加载所有3套75张图像时，我不遇到任何问题。

代码：应用程序类 - 我在哪里建造毕加索。

 Picasso.Builder builder = new Picasso.Builder(this)
            .memoryCache(new LruCache(24000));
    builder.downloader(new OkHttpDownloader(this,Integer.MAX_VALUE));
    Picasso built = builder.build();
    built.setLoggingEnabled(true);

毕加索·辛格尔顿班级：

public class PicassoCache {
/**
 * Static Picasso Instance
 */
private static Picasso picassoInstance = null;
/**
 * PicassoCache Constructor
 *
 * @param context application Context
 */
private PicassoCache (Context context) {
    Downloader downloader   = new OkHttpDownloader(context, Integer.MAX_VALUE);
    Picasso.Builder builder = new Picasso.Builder(context);
    builder.downloader(downloader);
    picassoInstance = builder.build();
}
/**
 * Get Singleton Picasso Instance
 *
 * @param context application Context
 * @return Picasso instance
 */
public static Picasso getPicassoInstance (Context context) {
    if (picassoInstance == null) {
        new PicassoCache(context);
        return picassoInstance;
    }
    return picassoInstance;
}
}

代码我正在使用毕加索设置/加载图像。

  PicassoCache.getPicassoInstance(context).load(url).placeholder(R.mipmap.banner_placeholder).into(mView);

代码在更改数据集时，我将在其中更新现有列表以加载。

在RetorFit OnSuccess内部消息：

    if (response.code() == 200) {
List<CampaignCard> newCampaigns = response.body().getCampaigns();

for (int i = 0; i < newCampaigns.size(); i++) {
    if (!campaignCards.contains(newCampaigns.get(i))) {
        campaignCards.add(newCampaigns.get(i));
    }
}
dashBoardAdapter.notifyDataSetChanged();
} else if (response.code() == Params.CODE_422) {
    Utils.ShowServiceErrorMessages(getActivity(), response);
} else if (response.code() == Params.CODE_401) {
    Utils.Logout(getActivity());
}

适配器类：

public class DashboardAdapter extends RecyclerView.Adapter<DashboardAdapter.DashboardViewHolder> implements View.OnClickListener {

    private static final int VIEW_TYPE_CAMPAIGN = 1;
    private static final int VIEW_TYPE_FEED = 2;
    DashboardViewHolder holder;

    protected List list;
    protected int viewTypeLayout;
    Context context;
    int position;
    Dashboard.DashboardActionList actionList;
    Map<String, SourceContent> mPreviewLinkMapper;
    ViewGroup parent;
    //Picasso p;
    public DashboardAdapter(List list, int viewTypeLayout) {
        this.list = list;
        this.viewTypeLayout = viewTypeLayout;
    }
    public DashboardAdapter(List list, int viewTypeLayout, Context context, Map<String, SourceContent> mPreviewLinkMapper) {
        this.list = list;
        this.viewTypeLayout = viewTypeLayout;
        this.mPreviewLinkMapper = mPreviewLinkMapper;
    }
    @Override
    public DashboardViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        context = parent.getContext();
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_feed, parent, false);
        return new DashboardViewHolder(view, 2);
    }
    @Override
    public void onBindViewHolder(DashboardViewHolder holder, final int position) {
        BindFeedData(holder, position);
    }
    @Override
    public long getItemId(int position) {
        return position;
    }
    @Override
    public int getItemCount() {
        return list.size();
    }


    @SuppressWarnings("unchecked")
    private void BindFeedData(DashboardViewHolder holder, int position) {
        List<Feed> feeds = (List<Feed>) list;
        if (holder.mBannerImage != null) {
            if (feeds.get(position).getCampaign().getParticipation().getType().toLowerCase().contains("video")) {
                holder.mPlayIcon.setVisibility(View.VISIBLE);
                String url = feeds.get(position).getCampaign().getParticipation().getThumbnail_url();
                Utils.LoadImages(context, url, holder.mBannerImage, false);
            } else if (feeds.get(position).getCampaign().getParticipation().getType().toLowerCase().contains("gif")) {
                holder.mPlayIcon.setVisibility(View.GONE);
                String url = feeds.get(position).getCampaign().getParticipation().getPost_file();
                Utils.loadGif(context, url, holder.mBannerImage);
            } else if (feeds.get(position).getCampaign().getParticipation().getType().toLowerCase().contains("link") ||
                    feeds.get(position).getCampaign().getParticipation().getType().toLowerCase().contains("youtube")) {
                holder.mPlayIcon.setVisibility(View.GONE);
                String slug = feeds.get(position).getCampaign().getSlug();
                List<String> images = mPreviewLinkMapper.get(slug).getImages();
                Utils.LoadImages(context, images.get(0), holder.mBannerImage, false);
            } else {
                holder.mPlayIcon.setVisibility(View.GONE);
                holder.mBannerImage.setVisibility(View.VISIBLE);
                String url = feeds.get(position).getCampaign().getParticipation().getPost_file();
                Utils.LoadImages(context, url, holder.mBannerImage, false);
            }
        }
        if (holder.mBrandLogo != null) {
            Utils.LoadImages(context, feeds.get(position).getInfluencer().getProfile_picture_url(), holder.mBrandLogo, true);
        }

        holder.mTitle.setText(feeds.get(position).getInfluencer().getName());
        holder.mSubTitle.setText(feeds.get(position).getCampaign().getName());
        holder.mTime.setText(feeds.get(position).getCampaign().getTimestamp());
        holder.mDescription.setText(feeds.get(position).getCampaign().getParticipation().getPost_content());
        holder.mEngagement.setText(feeds.get(position).getCampaign().getParticipation().getMetrics().getEngagements());
        holder.mImpresion.setText(feeds.get(position).getCampaign().getParticipation().getMetrics().getImpressions());
    }

    }

    public static class DashboardViewHolder extends RecyclerView.ViewHolder {
        ImageView mBannerImage, mFacebook, mTwitter, mInstagram, mPlayIcon, mHotIcon, mLocationIcon;
        CircularImageView mBrandLogo;
        CustomTextViewRegular mDescription, mTime, mOption1, mOption2, mOption3;
        CustomTextViewDemi mTitle, mSubTitle, mImpresion, mEngagement;
        LinearLayout mDetailsLayout;
        LinearLayout mOptionLayout1, mOptionLayout2, mOptionLayout3;
        public ViewGroup dropPreview;
        TableRow mTableOptions;
        public DashboardViewHolder(View v, int viewtype) {
            super(v);
            InitFeedViews(v);
          }


        private void InitFeedViews(View v) {
            mTitle = (CustomTextViewDemi) v.findViewById(R.id.adapterHeaderLayoutTitle);
            mSubTitle = (CustomTextViewDemi) v.findViewById(R.id.adapterHeaderLayoutSubTitle);
            mBrandLogo = (CircularImageView) v.findViewById(R.id.adapterHeaderLayoutLogo);
            mTime = (CustomTextViewRegular) v.findViewById(R.id.adapterHeaderLayoutTime);
            mBannerImage = (ImageView) v.findViewById(R.id.adapterFeedBannerImage);
            mPlayIcon = (ImageView) v.findViewById(R.id.adapterFeedPlayIocn);
            mImpresion = (CustomTextViewDemi) v.findViewById(R.id.adapterFeedImpressions);
            mEngagement = (CustomTextViewDemi) v.findViewById(R.id.adapterFeedEngagements);
            mDescription = (CustomTextViewRegular) v.findViewById(R.id.adapterFeedDescription);
            dropPreview = (LinearLayout) v.findViewById(R.id.drop_preview);
        }
    }
}

Answer 1

在毕加索库的情况下，您会面对"从内存"问题，我建议您使用Glide库。我有很多"不记忆"的例外，但最终使用Glide效果很好。

Answer 2

尝试使用毕加索库调整图像大小。OutofMemoryException将解决。

要更好地理解，请参阅下面的链接：https://futurestud.io/tutorials/picasso-image-resisizing-scaling-and-fit