嗨,我试图在我的应用程序中扩充我的 home_items.xml 但是它不起作用它只是给了我 fragment_home.xml 我想知道我该如何解决这个问题? (我可以发送代码的任何部分。)
HomeAdapter.java:
package com.example.soulforge.adapter;
import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.bumptech.glide.Glide;
import com.example.soulforge.R;
import com.example.soulforge.model.HomeModel;
import java.util.List;
import java.util.Random;
import de.hdodenhof.circleimageview.CircleImageView;
public class HomeAdapter extends RecyclerView.Adapter<HomeAdapter.HomeHolder>{
private List<HomeModel> list;
Context context;
public HomeAdapter(List<HomeModel> list, Context context) {
this.list = list;
this.context = context;
}
@NonNull
@Override
public HomeHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.home_items, parent, false);
return new HomeHolder(view);
}
@Override
public void onBindViewHolder(@NonNull HomeHolder holder, int position) {
holder.userNameTv.setText(list.get(position).getUserName());
holder.timeTv.setText(""+list.get(position).getTimestamp());
int count = list.get(position).getLikeCount();
if(count ==0){
holder.likeCountTv.setVisibility(View.INVISIBLE);
}else if (count == 1){
holder.likeCountTv.setText(count + " like");
}else{
holder.likeCountTv.setText(count + " likes");
}
holder.descriptionTv.setText(list.get(position).getDescription());
Random random = new Random();
int color = Color.argb(255, random.nextInt(256), random.nextInt(256), random.nextInt(256));
Glide.with(context.getApplicationContext())
.load(list.get(position).getProfileImage())
.placeholder(R.drawable.ic_person)
.timeout(6500)
.into(holder.profileImage);
Glide.with(context.getApplicationContext())
.load(list.get(position).getImageUrl())
.placeholder(new ColorDrawable(color))
.timeout(7000)
.into(holder.imageView);
}
@Override
public int getItemCount() {
return list.size();
}
static class HomeHolder extends RecyclerView.ViewHolder{
private CircleImageView profileImage;
private TextView userNameTv, timeTv, likeCountTv, descriptionTv;
private ImageView imageView;
private ImageButton likeBtn, commentBtn, shareBtn;
public HomeHolder(@NonNull View itemView) {
super(itemView);
profileImage = itemView.findViewById(R.id.profileImage);
imageView = itemView.findViewById(R.id.imageView);
userNameTv = itemView.findViewById(R.id.nameTv);
timeTv = itemView.findViewById(R.id.timeTv);
likeCountTv = itemView.findViewById(R.id.likeCountTv);
likeBtn = itemView.findViewById(R.id.likeBtn);
commentBtn = itemView.findViewById(R.id.commentBtn);
shareBtn = itemView.findViewById(R.id.shareBtn);
descriptionTv = itemView.findViewById(R.id.descTv);
}
}
}
Home.java:
package com.example.soulforge.fragments;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.soulforge.R;
import com.example.soulforge.adapter.HomeAdapter;
import com.example.soulforge.model.HomeModel;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.firestore.CollectionReference;
import com.google.firebase.firestore.DocumentReference;
import com.google.firebase.firestore.EventListener;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.FirebaseFirestoreException;
import com.google.firebase.firestore.QueryDocumentSnapshot;
import com.google.firebase.firestore.QuerySnapshot;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
public class Home extends Fragment {
private RecyclerView recyclerView;
HomeAdapter adapter;
private List<HomeModel> list;
private FirebaseUser user;
public Home() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_home, container, false);
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
init(view);
list = new ArrayList<>();
adapter = new HomeAdapter(list, getContext());
recyclerView.setAdapter(adapter);
loadDataFromFirestore();
}
private void init(View view) {
Toolbar toolbar = view.findViewById(R.id.toolbar);
if (getActivity() != null)
((AppCompatActivity) getActivity()).setSupportActionBar(toolbar);
recyclerView = view.findViewById(R.id.recyclerView);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
FirebaseAuth auth = FirebaseAuth.getInstance();
user = auth.getCurrentUser();
}
public void loadDataFromFirestore() {
CollectionReference reference = FirebaseFirestore.getInstance().collection("Users")
.document(user.getUid())
.collection("Post Images");
reference.addSnapshotListener(new EventListener<QuerySnapshot>() {
@Override
public void onEvent(@Nullable QuerySnapshot value, @Nullable FirebaseFirestoreException error) {
if (error != null) {
Log.e("Error: ", error.getMessage());
return;
}
if (value == null)
return;
for (QueryDocumentSnapshot snapshot : value) {
if (!snapshot.exists())
return;
HomeModel model = snapshot.toObject(HomeModel.class);
list.add(new HomeModel(
model.getUserName(),
model.getProfileImage(),
model.getImageUrl(),
model.getUid(),
model.getComments(),
model.getDescription(),
model.getId(),
model.getTimestamp(),
model.getLikeCount()
));
}
adapter.notifyDataSetChanged();
}
});
}
}
知道如何解决这个问题吗?我尝试使用 inflate 但它无法正常工作,因为它缺少 home items xml enter image description here。
在你说我已经清理和重建以及解决这个问题的所有常见问题之前
答案 0 :(得分:0)
您更新了错误的列表实例
在适配器中创建一个方法
public updateList(List<HomeModel> list) {
this.list = list;
notifyDataSetChanged()
}
并称之为:
reference.addSnapshotListener(new EventListener<QuerySnapshot>() {
@Override
public void onEvent(@Nullable QuerySnapshot value, @Nullable FirebaseFirestoreException error) {
...
adapter.updateList(new HomeModel(
model.getUserName(),
model.getProfileImage(),
model.getImageUrl(),
model.getUid(),
model.getComments(),
model.getDescription(),
model.getId(),
model.getTimestamp(),
model.getLikeCount()
));
}
}
});