java - 我在 Recyclerview 中显示来自 firebase 的图像时遇到问题

问题描述

我想在 Recyclerview 中显示我从 firebase 存储上传的图像。

这是我的 ImagesShowingNotices.java 类

private RecyclerView mRecyclerView;
private ImageAdapter mAdapter;

private ProgressBar mProgressCircle;

private DatabaseReference mDatabaseRef;
private List<Uplaodfiles> mUploads;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_image_showing_notices);

    mRecyclerView = findViewById(R.id.recyclerviewitems);
    mRecyclerView.setHasFixedSize(true);
    mRecyclerView.setLayoutManager(new LinearLayoutManager(this));

    mProgressCircle = findViewById(R.id.progress_circle);

    mUploads = new ArrayList<>();

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

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

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

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

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

@Override
protected void onStart() {
    super.onStart();

}

这是我的 UploadFiles.java 类

public Uplaodfiles() {
    //empty constructor needed
}

public Uplaodfiles(String name, String imageUrl) {
    if (name.trim().equals("")) {
        name = "No Name";
    }

    mName = name;
    mImageUrl = imageUrl;
}

public String getName() {
    return mName;
}

public void setName(String name) {
    mName = name;
}

public String getImageUrl() {
    return mImageUrl;
}

public void setImageUrl(String imageUrl) {
    mImageUrl = imageUrl;
}

这是我的 ImageAdapter.java 类

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

@Override
public void onBindViewHolder(ImageViewHolder holder, int position) {
    Uplaodfiles uploadCurrent = mUploads.get(position);
    holder.textViewName.setText(uploadCurrent.getName());
    Glide.with(mContext)
            .load(uploadCurrent.getImageUrl())
            .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);
    }
}

Logcat 显示“未连接适配器；跳过布局”。我已经尝试过关于 StackOverflow 上发布的这个问题的其他解决方案，但对我没有任何帮助。请帮助我摆脱这种情况。

先感谢您。

标签： javaandroidfirebase-realtime-databaseandroid-recyclerviewfirebase-storage

java - 我在 Recyclerview 中显示来自 firebase 的图像时遇到问题

问题描述

解决方案

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