[Java] RecyclerView view binding

RecyclerView가 보여주는 ITEM VIEW 들을 만들어주는 adapter에서 사용하는 ViewHolder의 아이템뷰에 view binding을 적용하는 것이다.

 

테스트를 하다보니 RecyclerView 를 적용한 Adapter 와 Activity 모두 view binding 을 적용해야 이미지가 정상적으로 보이는 것을 확인할 수 있었다.

 

변경되는 사항

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        // 새로운 뷰를 만든다.
        View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.address_item,parent,false);
        ViewHolder viewHolder = new ViewHolder(itemView);
        return viewHolder;
    }
 
    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        AddressItemBinding binding = AddressItemBinding.inflate(LayoutInflater.from(parent.getContext()),parent,false);
        return new ViewHolder(binding);
    }

 

 

public class ViewHolder extends RecyclerView.ViewHolder  {         View layout;         ImageView photoImg;         TextView tv_name;         TextView tv_mobileNO;         TextView tv_telNO;         ImageView call_btn;         CheckBox cbSelect;           public ViewHolder(@NonNull View itemView) {             super(itemView);             // 화면에 표시될 View 로부터 위젯에 대한 참조 획득             layout = itemView.findViewById(R.id.child_layout);             photoImg = itemView.findViewById(R.id.profile_Image);             tv_name = itemView.findViewById(R.id.child_name);             tv_mobileNO = itemView.findViewById(R.id.child_mobileNO);             tv_telNO = itemView.findViewById(R.id.child_telNO);             call_btn = itemView.findViewById(R.id.child_Btn);             cbSelect = itemView.findViewById(R.id.list_cell_checkbox);         }     }       public class ViewHolder extends RecyclerView.ViewHolder  {         AddressItemBinding itemBinding;           public ViewHolder(@NonNull AddressItemBinding binding) {             super(binding.getRoot());             itemBinding = binding;         }           void bindItem(Address_Item item){             if(!TextUtils.isEmpty(item.getPhoto())){                 Glide.with(mContext).load(item.getPhoto()).into(itemBinding.profileImage);             }             itemBinding.childName.setText(item.getUserNM());             itemBinding.childMobileNO.setText(PhoneNumberUtils.formatNumber(item.getMobileNO()));             itemBinding.childTelNO.setText(PhoneNumberUtils.formatNumber(item.getTelNO()));               itemBinding.childBtn.setOnClickListener(v -> {               });             itemBinding.listCellCheckbox.setChecked(item.getCheckBoxState());         }     }

 

View Binding을 적용한 코드

 

package com.link2me.android.sample.adapter;
 
import static com.link2me.android.sample.main.AddrBindActivity.constraintLayout;
import static com.link2me.android.sample.main.AddrBindActivity.isCheckFlag;
 
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.telephony.PhoneNumberUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
 
import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.recyclerview.widget.RecyclerView;
 
import com.bumptech.glide.Glide;
import com.link2me.android.sample.R;
import com.link2me.android.sample.databinding.AddressItemBinding;
import com.link2me.android.sample.model.Address_Item;
import com.link2me.android.sample.network.RetrofitUrl;
 
import java.util.ArrayList;
 
public class BindListViewAdapter extends RecyclerView.Adapter<BindListViewAdapter.ViewHolder> {
    private final String TAG = this.getClass().getSimpleName();
    Context context;
    private ArrayList<Address_Item> rvItemList;
 
    // 인터페이스 선언 -------------------------------------------------------------
    private OnItemClickListener mListener;
 
    public interface OnItemClickListener {
        void onItemClicked(View view, Address_Item item, int position);
    }
 
    public void setOnItemSelectClickListener(OnItemClickListener listener){
        mListener = listener;
    }
    // 인터페이스 ----------------------------------------------------------------
 
    public BindListViewAdapter(Context context, ArrayList<Address_Item> items) {
        this.context = context;
        rvItemList = items;
    }
 
    public void selectAll(){ // checkbox 전체 선택
        for(int i=0;i < rvItemList.size();i++){
            rvItemList.get(i).setCheckBoxState(true);
        }
        notifyDataSetChanged();
    }
    public void unselectall(){ // checkbox 전체 해제
        for(int i=0;i < rvItemList.size();i++){
            rvItemList.get(i).setCheckBoxState(false);
        }
        notifyDataSetChanged();
    }
 
    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        // 새로운 뷰를 만든다.
        AddressItemBinding binding = AddressItemBinding.inflate(LayoutInflater.from(parent.getContext()),parent,false);
        return new ViewHolder(binding);
    }
 
    @Override
    public void onBindViewHolder(@NonNull BindListViewAdapter.ViewHolder holder, int position) {
        holder.bindItem(rvItemList.get(position), position);
    }
 
    @Override
    public int getItemCount() {
        return rvItemList.size();
    }
 
    public class ViewHolder extends RecyclerView.ViewHolder  {
        AddressItemBinding itemBinding;
 
        public ViewHolder(@NonNull AddressItemBinding binding) {
            super(binding.getRoot());
            itemBinding = binding;
        }
 
        void bindItem(Address_Item item, int position){
            String photoURL = RetrofitUrl.BASE_URL + "photos/" + item.getPhoto();
            if(photoURL.contains("null")){
                Glide.with(context).asBitmap().load(R.drawable.photo_base).into(itemBinding.profileImage);
            } else {
                Glide.with(context).asBitmap().load(photoURL).into(itemBinding.profileImage);
            }
            itemBinding.childName.setText(item.getUserNM());
            itemBinding.childMobileNO.setText(PhoneNumberUtils.formatNumber(item.getMobileNO()));
            itemBinding.childOfficeNO.setText(PhoneNumberUtils.formatNumber(item.getTelNO()));
 
            itemBinding.profileImage.setOnClickListener(view1 -> {
                if(mListener != null){
                    mListener.onItemClicked(view1,item,position);
                    // 클릭의 결과로 값을 전달
                    Log.e(TAG,"item clicked : "+position);
                }
            });
 
            final String[] items ={"휴대폰 전화걸기","사무실전화 걸기"};
            final AlertDialog.Builder builder = new AlertDialog.Builder(context);
            builder.setTitle("해당작업을 선택하세요");
            builder.setItems(items, (dialog, which) -> {
                Toast.makeText(context, items[which] + "선택했습니다.", Toast.LENGTH_SHORT).show();
                switch (which){
                    case 0:
                        if(item.getMobileNO().length() ==0){
                            Toast.makeText(context, "전화걸 휴대폰 번호가 없습니다.",Toast.LENGTH_SHORT).show();
                            break;
                        }
 
                        AlertDialog dialog1 = new AlertDialog.Builder(context)
                                .setTitle(item.getUserNM())
                                .setMessage(PhoneNumberUtils.formatNumber(item.getMobileNO()) + " 통화하시겠습니까?")
                                .setPositiveButton("예",
                                        (dialog23, which13) -> {
 
                                            Intent intent = new Intent(Intent.ACTION_CALL,
                                                    Uri.parse("tel:" + PhoneNumberUtils.formatNumber(item.getMobileNO())));
                                            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                                            context.startActivity(intent);
                                        })
                                .setNegativeButton(
                                        "아니오",
                                        (dialog22, which12) -> dialog22.dismiss()).create();
                        dialog1.show();
                        break;
                    case 1:
                        if(item.getTelNO().length() ==0){
                            Toast.makeText(context, "전화걸 사무실 번호가 없습니다.",Toast.LENGTH_SHORT).show();
                            break;
                        }
                        AlertDialog dialog2 = new AlertDialog.Builder(context)
                                .setTitle(item.getUserNM())
                                .setMessage(PhoneNumberUtils.formatNumber(item.getTelNO()) + " 통화하시겠습니까?")
                                .setPositiveButton("예",
                                        (dialog3, which1) -> {
 
                                            Intent intent = new Intent(Intent.ACTION_CALL,
                                                    Uri.parse("tel:" + PhoneNumberUtils.formatNumber(item.getTelNO())));
                                            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                                            context.startActivity(intent);
                                        })
                                .setNegativeButton(
                                        "아니오",
                                        (dialog32, which14) -> dialog32.dismiss()).create();
                        dialog2.show();
                        break;
 
                }
            });
            builder.create();
 
            itemBinding.callBtn.setOnClickListener(v -> builder.show());
 
 
            if (isCheckFlag == false) {
                itemBinding.callBtn.setVisibility(View.VISIBLE);
                itemBinding.callBtn.setOnClickListener(view -> builder.show());
                itemBinding.listcellCheckbox.setVisibility(View.GONE);
                itemBinding.childLayout.setOnClickListener(view ->
                        Toast.makeText(context, "상세보기를 눌렀습니다 ===" + item.getIdx(), Toast.LENGTH_SHORT).show());
 
                itemBinding.childLayout.setOnLongClickListener(v -> {
                    isCheckFlag = true;
                    constraintLayout.setVisibility(View.VISIBLE);
                    notifyDataSetChanged();
                    return true;
                });
            } else {
                itemBinding.callBtn.setVisibility(View.GONE);
                //convertView.setClickable(false);
                itemBinding.listcellCheckbox.setVisibility(View.VISIBLE);
                itemBinding.listcellCheckbox.setTag(position); // This line is important.
 
                // 체크 박스 클릭하면 CheckBoxState 에 반영한다. setOnCheckedChangeListener 대신 사용
                itemBinding.listcellCheckbox.setOnClickListener(v -> {
                    if(rvItemList.get(position).getCheckBoxState() == true){
                        rvItemList.get(position).setCheckBoxState(false);
                        Log.d("checkbox","position : "+ position + " checkBoxState === "+ rvItemList.get(position).getCheckBoxState());
                    } else {
                        rvItemList.get(position).setCheckBoxState(true);
                        Log.d("checkbox","position : "+ position + " checkBoxState === "+ rvItemList.get(position).getCheckBoxState());
                    }
                });
 
                itemBinding.childLayout.setOnClickListener(v -> {
                    if(itemBinding.listcellCheckbox.isChecked() == false){
                        itemBinding.listcellCheckbox.setChecked(true);
                        rvItemList.get(position).setCheckBoxState(true);
                        //notifyDataSetChanged();
                        Log.d("checklist","position : "+ position + " checkBoxState === "+ rvItemList.get(position).getCheckBoxState());
                    } else {
                        itemBinding.listcellCheckbox.setChecked(false);
                        rvItemList.get(position).setCheckBoxState(false);
                        //notifyDataSetChanged();
                        Log.d("checklist","position : "+ position + " checkBoxState === "+ rvItemList.get(position).getCheckBoxState());
                    }
                });
            }
 
            // 재사용 문제 해결
            if(rvItemList.get(position).getCheckBoxState() == true){
                itemBinding.listcellCheckbox.setChecked(true);
                Log.d("ReUse","position : " + position + " checkBoxState === " + rvItemList.get(position).getCheckBoxState());
            } else {
                itemBinding.listcellCheckbox.setChecked(false);
                Log.d("ReUse","position : "+position + " checkBoxState ===" + rvItemList.get(position).getCheckBoxState());
            }
        }
    }
 
}