Android Picasso image loading app crash when scrolling RecyclerView

问题

I am using Retrofit to access this Webservice link:

https://jsonplaceholder.typicode.com/photos

When loading the items in a recyclerview without loading images, the app works fine. However, if I add Picasso code to load the images, the app crashes after scrolling 2 or three times.

I get the following error:

A/Looper: Could not make wake event fd: Too many open files

---

OR these errors all together:

E/Parcel: fcntl(F_DUPFD_CLOEXEC) failed in Parcel::read, i is 0, fds[i] is -1, fd_count is 1, error: Too many open files

E/EGL_emulation: tid 11410: swapBuffers(552): error 0x300d (EGL_BAD_SURFACE)

A/Looper: Could not make wake event fd: Too many open files

E/NativeCrypto: AppData::create pipe(2) failed: Too many open files

---

Here's the only code that causes problems:

I first set this in the Adapter constructor:

Picasso.Builder builder = new Picasso.Builder(context);
builder.downloader(new OkHttp3Downloader(context));

And that's the picasso code in the onBind() of the RecyclerView

public void onBindViewHolder(CustomViewHolder holder, int position) {
        holder.txtTitle.setText(dataList.get(position).getTitle());

      ---------------------------------------------------------
        builder.indicatorsEnabled(true);
        builder.build().load(dataList.get(position).getThumbnailUrl())
                .placeholder((R.drawable.ic_launcher_background))
                .error(R.drawable.ic_launcher_background)
                .into(holder.coverImage);
      ----------------------------------------------------------

    }

---

---

Here is the Retrofit code:

  RetrofitServiceInterface service = RetrofitClient.getRetrofitInstance().create(RetrofitServiceInterface.class);
        Call<List<RetroPhoto>> call = service.getAllPhotos();
        call.enqueue(new Callback<List<RetroPhoto>>() {
            @Override
            public void onResponse(Call<List<RetroPhoto>> call, Response<List<RetroPhoto>> response) {
                progressDoalog.dismiss();
                generateDataList(response.body());
            }

            @Override
            public void onFailure(Call<List<RetroPhoto>> call, Throwable t) {
                progressDoalog.dismiss();
                Toast.makeText(MainActivity.this, "Something went wrong...Please try later!", Toast.LENGTH_SHORT).show();
                Log.e("error",t.getMessage());
            }
        });
    }
    /*Method to generate List of data using RecyclerView with custom adapter*/
    private void generateDataList(List<RetroPhoto> photoList) {
        recyclerView = findViewById(R.id.customRecyclerView);
        adapter = new CustomAdapter(this,photoList);
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(MainActivity.this);
        recyclerView.setLayoutManager(layoutManager);
        recyclerView.setAdapter(adapter);
    }

And Here's the full RecyclerView Adapter Code:

public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.CustomViewHolder> {

    private List<RetroPhoto> dataList;
    private Context context;
    Picasso.Builder builder;

    public CustomAdapter(Context context,List<RetroPhoto> dataList){
        this.context = context;
        this.dataList = dataList;

        builder = new Picasso.Builder(context);
        builder.downloader(new OkHttp3Downloader(context));
        builder.indicatorsEnabled(true);

    }

    class CustomViewHolder extends RecyclerView.ViewHolder {

        public final View mView;

        TextView txtTitle;
        private ImageView coverImage;

        CustomViewHolder(View itemView) {
            super(itemView);
            mView = itemView;

            txtTitle = mView.findViewById(R.id.title);
            coverImage = mView.findViewById(R.id.coverImage);
        }
    }

    @Override
    public CustomViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
        View view = layoutInflater.inflate(R.layout.custom_row, parent, false);
        return new CustomViewHolder(view);
    }

    @Override
    public void onBindViewHolder(CustomViewHolder holder, int position) {
        holder.txtTitle.setText(dataList.get(position).getTitle());

        builder.build().load(dataList.get(position).getThumbnailUrl())
                .placeholder((R.drawable.ic_launcher_background))
                .error(R.drawable.ic_launcher_background)
                .into(holder.coverImage);

    }

    @Override
    public int getItemCount() {
        return dataList.size();
    }
}

来源：https://stackoverflow.com/questions/52869627/android-picasso-image-loading-app-crash-when-scrolling-recyclerview