Question

我已为我的应用程序使用Firebase创建了一个上传图片部分。但是，当我尝试使用 Recycler视图和 ImageAdapter 加载图像时，它会崩溃。我正在考虑装载毕加索的错误。

我的适配器类

public class ImageAdapter extends RecyclerView.Adapter<ImageAdapter.ImageViewHolder> {
private Context mContext;
private List<Upload> mUploads;



public ImageAdapter(Context context, List<Upload> uploads) {
    mContext = context;
    mUploads = uploads;
}

@Override
public ImageViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View v = LayoutInflater.from(mContext).inflate(R.layout.image_item, parent, false);
    return new ImageViewHolder(v);
}

@Override
public void onBindViewHolder(ImageViewHolder holder, int position) {
    Upload uploadCurrent = mUploads.get(position);
    holder.textViewName.setText(uploadCurrent.getName());

    Picasso picasso = new Picasso.Builder(this)
            .listener(new Picasso.Listener() {
                @Override
                public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
                    //Here your log
                }
            })
            .build();
    picasso.load(uploadCurrent.getImageUrl())
            .fit()
            .centerCrop()
            .into(holder.imageView);

}

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

public class ImageViewHolder extends RecyclerView.ViewHolder {
    public TextView textViewName;
    public ImageView imageView;

    public ImageViewHolder(View itemView) {
        super(itemView);

        textViewName = itemView.findViewById(R.id.text_view_name);
        imageView = itemView.findViewById(R.id.image_view_upload);
    }
}

以下部分位于我的主要图库活动

中

 mUploads = new ArrayList<>();

    mDatabaseRef = FirebaseDatabase.getInstance().getReference("uploads");

    mDatabaseRef.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            for (DataSnapshot postSnapshot : dataSnapshot.getChildren()) {
                Upload upload = postSnapshot.getValue(Upload.class);
                mUploads.add(upload);
            }

            mAdapter = new ImageAdapter(Gallery.this, mUploads);

            mRecyclerView.setAdapter(mAdapter);
            mProgressCircle.setVisibility(View.INVISIBLE);
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            Toast.makeText(Gallery.this, databaseError.getMessage(), Toast.LENGTH_SHORT).show();
            mProgressCircle.setVisibility(View.INVISIBLE);
        }
    });

我做错了什么？请帮我解决编码错误。

Answer 1

这是错误的

Picasso picasso = new Picasso.Builder(this)
            .listener(new Picasso.Listener() {
                @Override
                public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
                    //Here your log
                }
            })
            .build();
    picasso.load(uploadCurrent.getImageUrl())
            .fit()
            .centerCrop()
            .into(holder.imageView);

首先应该在向其添加侦听器之前加载资源

Picasso picasso = new Picasso.Builder(this)
            .load(uploadCurrent.getImageUrl())
            .listener(new Picasso.Listener() {
                @Override
                public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
                    //Here your log
                }
            })
            .build();
            .fit()
            .centerCrop()
            .into(holder.imageView);

你也可以在你的.into

中使用听众

Picasso picasso = new Picasso.Builder(this)
                .load(uploadCurrent.getImageUrl())
                .build();
                .fit()
                .centerCrop()
                .into(holder.imageView,, new com.squareup.picasso.Callback() {
                        @Override
                        public void onSuccess() {

                        }

                        @Override
                        public void onError() {

                        }
                    });

Answer 2

Picasso更改了导致错误的一些参数

@Override
public void onBindViewHolder(ImageViewHolder holder, int position) {
    Upload uploadCurrent = mUploads.get(position);
    holder.textViewName.setText(uploadCurrent.getName());
    Picasso.get()
            .load(uploadCurrent.getImageUrl())
            .placeholder(R.drawable.logo)
            .fit()
            .centerCrop()
            .into(holder.imageView);
}

他们改变了

Picasso.with(Context)

到

Picasso.get()

感谢您的支持......这可能会帮助像我一样的人......

图像适配器类的Piccasso错误

2 个答案: