firebase ui升级到3.2.2时未显示输出 [英] Output not showing when the firebase ui upgrade to 3.2.2

问题描述

当我将firebase-ui版本升级到3.2.2时，firebaserecycleradapter不会显示我的代码的任何输出.首先，当我遇到multidex错误时，我根据应用程序lvl gradle的依赖关系将所有库版本升级到最新版本，升级后发现问题是Firebaserecycleradapter方法，然后在运行应用程序后搜索并编写列表视图未显示plz帮助我.

When i upgrade my firebase-ui version to 3.2.2 the firebaserecycleradapter doesn't show any output the code of mine. at first when i got multidex error then i upgrade all library version to lastest version on dependency of app lvl gradle and after upgrade the problem is found the Firebaserecycleradapter method then i search it and write after run the app the list view are not displaying plz help me.

onStart():

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);

    }

，观看者是:

//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);
        }
    }

推荐答案

为了使您的代码正常工作，请考虑使用以下步骤.

In order to make your code work, please consider using the following steps.

1. 从您的UsersViewHolder类的声明中删除static.只能是:

1. Remove the static from the declaration of your UsersViewHolder class. Should be only:

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

还要从mView字段和所有方法中删除static关键字.您的Holder类应如下所示:

Remove the static keyword also from the mView field and all your methods. Your holder class should look like this:

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);
    }
}

从onCreate()方法内的onStart()方法中移出所有代码，除了以下代码行:

Move all the code from the onStart() method inside onCreate() method except this line of code:

super.onStart();

将您的firebaseRecyclerAdapter变量设为全局变量:

Make your firebaseRecyclerAdapter varaible global:

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.

Add the following lines of code in the onStart() and onStop() methods.

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

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

如果您使用的是身份验证，也请不要忘记在onStart()方法中添加以下代码行:

If you are using authentication, please also don't forget to add this line of code inside onStart() method:

firebaseAuth.addAuthStateListener(authStateListener);

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