java - 使用“Glide”时遇到问题

Question

这是我的User.Adapter.java的代码：

package com.example.wanderspacetraveljournalapp.Adapter;

import android.content.Context;
import android.content.SharedPreferences;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.fragment.app.FragmentActivity;
import androidx.recyclerview.widget.RecyclerView;

import com.bumptech.glide.Glide;
import com.example.wanderspacetraveljournalapp.Fragment.ProfileFragment;
import com.example.wanderspacetraveljournalapp.Model.User;
import com.example.wanderspacetraveljournalapp.R;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;

import java.util.List;

import de.hdodenhof.circleimageview.CircleImageView;

public class UserAdapter extends RecyclerView.Adapter<UserAdapter.ViewHolder> {

    private Context mContext;
    private List<User> mUsers;

    private FirebaseUser firebaseUser;

    public UserAdapter(Context mContext, List<User> mUsers) {
        this.mContext = mContext;
        this.mUsers = mUsers;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(mContext).inflate(R.layout.user_item, viewGroup, false);
        return new UserAdapter.ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull final ViewHolder viewHolder, int i) {

        firebaseUser = FirebaseAuth.getInstance().getCurrentUser();

        final User user = mUsers.get(i);

        viewHolder.btn_follow.setVisibility(View.VISIBLE);

        viewHolder.username.setText(user.getUsername());
        viewHolder.fullname.setText(user.getFullname());
        Glide.with(mContext).load(user.getImageurl()).into(viewHolder.image_profile);
        isFollowing(user.getId(), viewHolder.btn_follow);

        if (user.getId().equals(firebaseUser.getUid())) {
            viewHolder.btn_follow.setVisibility(View.GONE);
        }

        viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                SharedPreferences.Editor editor = mContext.getSharedPreferences("PREFS", Context.MODE_PRIVATE).edit();
                editor.putString("profileid", user.getId());
                editor.apply();

                ((FragmentActivity)mContext).getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                        new ProfileFragment()).commit();
            }
        });

        viewHolder.btn_follow.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (viewHolder.btn_follow.getText().toString().equals("follow")){
                    FirebaseDatabase.getInstance().getReference().child("follow").child(firebaseUser.getUid())
                            .child("following").child(user.getId()).setValue(true);
                    FirebaseDatabase.getInstance().getReference().child("follow").child(user.getId())
                            .child("followers").child(firebaseUser.getUid()).setValue(true);
                } else {
                    FirebaseDatabase.getInstance().getReference().child("follow").child(firebaseUser.getUid())
                            .child("following").child(user.getId()).removeValue();
                    FirebaseDatabase.getInstance().getReference().child("follow").child(user.getId())
                            .child("followers").child(firebaseUser.getUid()).removeValue();
                }
            }
        });

    }

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

    public class ViewHolder extends RecyclerView.ViewHolder{

        public TextView username;
        public TextView fullname;
        public CircleImageView image_profile;
        public Button btn_follow;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);

            username = itemView.findViewById(R.id.username);
            fullname = itemView.findViewById(R.id.fullname);
            image_profile = itemView.findViewById(R.id.image_profile);
            btn_follow = itemView.findViewById(R.id.btn_follow);
        }
    }

    private void isFollowing(final String userid, final Button button) {
        DatabaseReference reference = FirebaseDatabase.getInstance().getReference()
                .child("Follow").child(firebaseUser.getUid()).child("following");
        reference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                if (dataSnapshot.child(userid).exists()){
                    button.setText("following");
                } else {
                    button.setText("follow");
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });
    }

}

现在我面临的问题是，当我单击用户个人资料的“关注”按钮时，我没有在“关注”中打开它。在Firebase数据库中，它正在正确显示，我正在关注该特定用户。但在应用程序中，它无法正常发生。我知道这是因为“滑行”，但找不到完美的答案。所以在这里，我分享了我的代码，并等待可能对我有用的完美答案。我正在使用最新的Android Studio 4.0。这是我的 build.gradle

    implementation ("com.github.bumptech.glide:glide:4.9.0") {
        exclude group: "com.android.support"
    }
    annotationProcessor 'androidx.annotation:annotation:1.1.0'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.9.0'
    implementation ("com.github.bumptech.glide:glide:4.9.0@aar") {
        transitive = true
    }

Answer 1

对于应用程序端的更改值，需要通知您的适配器

在最后一个notifyDataSetChanged(); btn_follow中添加onClickListener