[ListView VS RecyclerView]

간단한 데이터를 보여주는 View라서 ListView로 구현하였는데,

스크롤 하면 데이터가 없어지는 이슈가 있었다. ViewHolder패턴으로 할까, ListViewRecyclerView로 구현할까 고민하다가

RecyclerView로 구현하였다. (블로그들의 이유 때문에..)

또 새로운 사실을 알았다!! 역시 Android 기본 공부& 구현을 많이 해야게따!!

[ListViewAdapter.java]

package com.zodiac.aries.screen.registerdoc;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;

import com.zodiac.aries.R;
import com.zodiac.aries.databinding.LayoutItemSelectModuleBinding;
import com.zodiac.aries.screen.registerdoc.data.Module;

import java.util.ArrayList;
import java.util.List;

import androidx.databinding.DataBindingUtil;
import androidx.lifecycle.ViewModelProvider;
import androidx.lifecycle.ViewModelStoreOwner;

/**
 * @author khji
 * <p>
 * 모듈 추가/수정 다이얼로그 - lvRegisterDocModule 에서 사용하는 Adapter
 */
public class SelectModuleAdapter extends BaseAdapter {
    private static final String TAG = SelectModuleAdapter.class.getSimpleName();

    private LayoutItemSelectModuleBinding mBinding;
    private LayoutInflater layoutInflater;
    private ModuleViewModel moduleViewModel;

    public void setModuleList(List<Module> moduleList) {
        this.moduleList = moduleList;
    }

    private List<Module> moduleList;

    public SelectModuleAdapter(Activity activity) {
        this.layoutInflater = LayoutInflater.from(activity);
        this.moduleViewModel = new ViewModelProvider((ViewModelStoreOwner) activity).get(ModuleViewModel.class);
        this.moduleList = new ArrayList<>();
    }

    public SelectModuleAdapter(Activity activity, List<Module> moduleList) {
        this.layoutInflater = LayoutInflater.from(activity);
        this.moduleViewModel = new ViewModelProvider((ViewModelStoreOwner) activity).get(ModuleViewModel.class);
        this.moduleList = moduleList;
    }

    @Override
    public int getCount() {
        return moduleList.size();
    }

    @Override
    public Module getItem(int position) {
        return moduleList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        mBinding = DataBindingUtil.inflate(layoutInflater, R.layout.layout_item_select_module, parent, false);
        mBinding.setAdapter(this);
        mBinding.setViewModel(moduleViewModel);

        Module moduleInfo = moduleList.get(position);

        mBinding.selectModuleItemName.setText(moduleInfo.getName() + " v" + moduleInfo.getVersion());
        mBinding.selectModuleItemNum.setText(String.valueOf(moduleInfo.getCopy()));

        CheckBox cbModuleItem = mBinding.selectModuleItemCheck;
        Button btnModuleItemMinus = mBinding.selectModuleItemNumMinus;
        Button btnModuleItemPlus = mBinding.selectModuleItemNumPlus;
        TextView tvSelectModuleItemNum = mBinding.selectModuleItemNum;

        cbModuleItem.setTag(position);

        boolean isRequireYn = moduleInfo.isRequireYn();
        cbModuleItem.setChecked(isRequireYn);
        cbModuleItem.setClickable(!isRequireYn);
        cbModuleItem.setEnabled(!isRequireYn);

        cbModuleItem.setOnCheckedChangeListener(((buttonView, isChecked) -> {
            if (!isChecked) {
                tvSelectModuleItemNum.setText(String.valueOf(0));
            } else {
                tvSelectModuleItemNum.setText(String.valueOf(1));
            }
        }));

//        if (selectedSeqList != null && selectedSeqList.size() > 0) {
//            for (String moduleSeq : selectedSeqList) {
//                if (moduleInfo.getModuleSeq().equals(moduleSeq)) {
//                    cbModuleItem.setChecked(true);
//                    cbModuleItem.setClickable(false);
//                    mBinding.selectModuleItemNum.setText(String.valueOf(1));
//                }
//            }
//        }
        btnModuleItemMinus.setTag(position);
        btnModuleItemMinus.setOnClickListener(view -> changeCopyNum(cbModuleItem, tvSelectModuleItemNum, isRequireYn, false));

        btnModuleItemPlus.setTag(position);
        btnModuleItemPlus.setOnClickListener(view -> changeCopyNum(cbModuleItem, tvSelectModuleItemNum, isRequireYn, true));

        return mBinding.getRoot();
    }

    public void changeCopyNum(CheckBox cbModuleItem, TextView tvSelectModuleItemNum, boolean requireYn, boolean isPlus) {
        int getCopy = Integer.parseInt(tvSelectModuleItemNum.getText().toString());
        int change = getCopy + ((isPlus) ? 1 : -1);
        int limit = (requireYn) ? 1 : 0;
        int copy = (change < limit) ? limit : change;

        cbModuleItem.setChecked(copy > 0);

        tvSelectModuleItemNum.setText(String.valueOf(copy));
    }
}

 

 

• 참고

https://woovictory.github.io/2019/01/03/Android-Diff-of-ListView-and-RecyclerView/

[안드로이드] ListView vs RecyclerView

http://dudmy.net/android/2017/06/23/consider-of-recyclerview/

RecyclerView에 대한 고찰 - Dudmy's DevLog