当 firebase ui 升级到 3.2.2 时输出不显示

Question

当我将我的 firebase-ui 版本升级到 3.2.2 时，firebaserecycleradapter 没有显示我的代码的任何输出。起初，当我遇到 multidex 错误时，我将所有库版本升级到依赖于应用程序 lvl gradle 的最新版本，升级后发现问题是 Firebaserecycleradapter 方法，然后我搜索它并在运行应用程序之后写入列表视图不显示请帮助我。

onStart():

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

        FirebaseRecyclerOptions <Users> options = new FirebaseRecyclerOptions.Builder<Users>()
                .setQuery(mUserDatabase,Users.class)
                .build();
        FirebaseRecyclerAdapter<Users, UsersViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Users, UsersViewHolder>(options) {
            @NonNull
            @Override
            public UsersViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
                View view = LayoutInflater.from(parent.getContext())
                        .inflate(R.layout.user_list_layout, parent, false);
                return new UsersViewHolder(view);
            }

            @Override
            protected void onBindViewHolder(@NonNull UsersViewHolder holder, int position, @NonNull Users model) {
                holder.setName(model.getName());
                holder.setStatus(model.getStatus());
                holder.setRIDNo(model.getRidno());
                holder.setUserImage(model.getThumb_image(), getApplicationContext());

                //to get key
                final String user_id = getRef(position).getKey();

                holder.mView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        Intent profileIntent = new Intent(UsersActivity.this, ProfileActivity.class);
                        profileIntent.putExtra("user_id", user_id);
                        startActivity(profileIntent);

                    }
                });
            }

        };
        mUsersList.setAdapter(firebaseRecyclerAdapter);

    }

并且取景器是：

//User list viewholder
    public static class UsersViewHolder extends RecyclerView.ViewHolder {

        static View mView;
        private CircleImageView mUserView;

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

            mView = itemView;
        }

        public static void setName(String name){
            TextView userNameView = (TextView) mView.findViewById(R.id.user_single_name);
            userNameView.setText(name);
        }
        public static void setStatus(String status){
            TextView userStatusView = (TextView) mView.findViewById(R.id.user_single_status);
            userStatusView.setText(status);
        }
        public static void setRIDNo(String ridno){
            TextView userRIDNoView = (TextView) mView.findViewById(R.id.user_single_ridno);
            userRIDNoView.setText(ridno);
        }
        public static void setUserImage(String thumb_image, Context ctx){
            CircleImageView userImageView = (CircleImageView) mView.findViewById(R.id.user_single_image);
            Picasso.with(ctx).load(thumb_image).placeholder(R.drawable.default_avatar).into(userImageView);
        }
    }

Answer 1

为了使您的代码正常工作，请考虑使用以下步骤。

从 UsersViewHolder class 的声明中删除 static。应该只有：

public class UsersViewHolder extends RecyclerView.ViewHolder {/* ... */}

也从 mView 字段和所有方法中删除 static 关键字。你的支架 class 应该是这样的：

public class UsersViewHolder extends RecyclerView.ViewHolder {
    private View mView;
    private CircleImageView mUserView;

    public UsersViewHolder(View itemView) {
        super(itemView);
        mView = itemView;
    }

    public void setName(String name){
        TextView userNameView = (TextView) mView.findViewById(R.id.user_single_name);
        userNameView.setText(name);
    }
    public void setStatus(String status){
        TextView userStatusView = (TextView) mView.findViewById(R.id.user_single_status);
        userStatusView.setText(status);
    }
    public void setRIDNo(String ridno){
        TextView userRIDNoView = (TextView) mView.findViewById(R.id.user_single_ridno);
        userRIDNoView.setText(ridno);
    }
    public void setUserImage(String thumb_image, Context ctx){
        CircleImageView userImageView = (CircleImageView) mView.findViewById(R.id.user_single_image);
        Picasso.with(ctx).load(thumb_image).placeholder(R.drawable.default_avatar).into(userImageView);
    }
}

将 onStart() 方法中的所有代码移到 onCreate() 方法中，除了这行代码：
```
super.onStart();
```

使您的 firebaseRecyclerAdapter 变量成为全局变量：

private FirebaseRecyclerAdapter<Users, UsersViewHolder> firebaseRecyclerAdapter;

从 onCreate() 方法中删除 FirebaseRecyclerAdapter<Blog, BlogViewHolder>。

在 onStart() 和 onStop() 方法中添加以下代码行。

@Override
protected void onStart() {
    super.onStart();
    firebaseRecyclerAdapter.startListening();
}

@Override
protected void onStop() {
    super.onStop();
    if(firebaseRecyclerAdapter != null) {
        firebaseRecyclerAdapter.stopListening();
    }
}

如果您使用身份验证，也请不要忘记在 onStart() 方法中添加这行代码：
```
firebaseAuth.addAuthStateListener(authStateListener);
```

当 firebase ui 升级到 3.2.2 时输出不显示

Output not showing when the firebase ui upgrade to 3.2.2

android

firebase

firebase-authentication

firebase-realtime-database

firebaseui