使用回收视图进行修复我想要追加一张图片

Question

我想向人们展示包括照片在内的信息。

这是User.class

public class User {

//파이어 스토어 필드 변수명과 타입이 같아야 한다. ex) 프사 라즈 INTP 구일 23
String name, mbti, region, age, profile_image;



public User(){
    //must be empty
}

public User(String name, String mbti, String region, String age, String profile_image) {
    this.name = name;
    this.mbti = mbti;
    this.region = region;
    this.age = age;
    this.profile_image = profile_image;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getMbti() { return mbti; }

public void setMbti(String mbti) {this.mbti = mbti; }

public String getRegion() { return region; }

public void setRegion(String region) { this.region = region; }

public String getAge() { return age; }

public void setAge(String age) { this.age = age; }

public String getProfile_image() { return profile_image; }

public void setProfile_image(String profile_image) { this.profile_image = profile_image; }}

下面是MyAdapter类

Context context;
ArrayList<User> userArrayList;

public MyAdapter(Context context, ArrayList<User> userArrayList) {
    this.context = context;
    this.userArrayList = userArrayList;
}

@NonNull
@Override
public MyAdapter.MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

    View v = LayoutInflater.from(context).inflate(R.layout.item, parent, false);
    return new MyViewHolder(v);

}

@Override
public void onBindViewHolder(@NonNull MyAdapter.MyViewHolder holder, int position) {

    User user = userArrayList.get(position);
    holder.name.setText(user. name);
    holder.mbti.setText(user.mbti);
    holder.region.setText(user.region);
    holder.age.setText(user.age);
    Glide.with(context).load(user.getProfile_image()).into(holder.imgprofile);

}

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

public static class MyViewHolder extends RecyclerView.ViewHolder {

    TextView name, mbti, region, age;
    ImageView imgprofile;

    public MyViewHolder(@NonNull View itemView) {

        super(itemView);
        name = itemView.findViewById(R.id.tvfirstName);
        mbti = itemView.findViewById(R.id.item_mbti);
        region = itemView.findViewById(R.id.item_region);
        age = itemView.findViewById(R.id.item_age);
        imgprofile =  itemView.findViewById(R.id.main_profileimg);


    }
}

在我的MainActivity中，我使用firestore.collection()和firestore.collection，这样回收视图就可以获得人们的信息。

但是图片存储在Firebase存储->配置文件/图片-> uid.jpg中。

我是初学者，所以我不能转换代码userArrayList.add(dc.getDocument().toObject(User.class))

firestore.collection("Users")
            .whereEqualTo("mbti",mainsearch_mbti)
            .orderBy("time",Query.Direction.DESCENDING).limit(50)
            .addSnapshotListener(new EventListener<QuerySnapshot>() {
                @Override
                public void onEvent(@Nullable QuerySnapshot value, @Nullable FirebaseFirestoreException error) {
                    if(error != null){

                        if(progressDialog.isShowing()){
                            progressDialog.dismiss();
                        }

                        Log.e("Firestore error",error.getMessage());
                        return;

                    }

                    for (DocumentChange dc : value.getDocumentChanges()){

                        if (dc.getType() == DocumentChange.Type.ADDED){
                            userArrayList.add(dc.getDocument().toObject(User.class));
                        }

                        myAdapter.notifyDataSetChanged();
                        if(progressDialog.isShowing()){
                            progressDialog.dismiss();
                        }
                    }

                }
            });

Answer 1

您可以使用value.getDocuments()函数获取数据。

for (DocumentSnapshot snapshot : value.getDocuments()) {
                    Map<String,Object> dataMap = snapshot.getData();
                    String abc = (String) dataMap.get("abc");
}