android - 折叠/展开可扩展 ListView 会更改 checkedtextview 中随机子项的切换

Question

我能够在 expandablelistview 中实现 checkedtextview。但是当我检查某些子项时，其他父项的某些子项也会被选中。我无法弄清楚为什么我会遇到这样的问题？有人遇到过类似情况吗？提前感谢您的帮助。

编辑:

按照建议，我在 customadapter 中创建了 bool 多维数组:`

Boolean[][] categoryx = new Boolean` [5][5];

自定义适配器中有 getchildView 方法:

 @Override
      public View getChildView(int groupPosition, final int childPosition,
          boolean isLastChild, View convertView, ViewGroup parent) {
          System.out.print(groupPosition);
          System.out.println(childPosition);
        final String children = (String) getChild(groupPosition, childPosition);
        CheckedTextView text = null;
        if (convertView == null) {
          convertView = inflater.inflate(R.layout.listrow_details, null);
        }
        text = (CheckedTextView) convertView.findViewById(R.id.detail_textView1);
        text.setText(children);

        convertView.setOnClickListener(new OnClickListener() {
          @Override
          public void onClick(View v) {

              ((CheckedTextView )v).toggle();
          }
        });
        return convertView;
      }

但我很困惑我应该使用访问的子位置切换我的值的方法。

编辑 2:我试图保存状态的自定义适配器:

import android.app.Activity;
import android.util.SparseArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckedTextView;
import android.widget.TextView;
import android.widget.Toast;

public class MyCategoryAdapter extends BaseExpandableListAdapter {

      private SparseArray<Groupx> groups;
      public LayoutInflater inflater;
      public Activity activity;
      Boolean[][] categoryx = new Boolean [5][5];

      public MyCategoryAdapter(Activity act, SparseArray<Groupx> groups) {
        activity = act;
        this.groups = groups;
        inflater = act.getLayoutInflater();
      }

      @Override
      public Object getChild(int groupPosition, int childPosition) {
        return groups.get(groupPosition).children.get(childPosition);
      }

      @Override
      public long getChildId(int groupPosition, int childPosition) {
        return 0;
      }

      @Override
      public View getChildView(int groupPosition, final int childPosition,
          boolean isLastChild, View convertView, ViewGroup parent) {
          System.out.print(groupPosition);
          System.out.println(childPosition);
        final String children = (String) getChild(groupPosition, childPosition);
        CheckedTextView text = null;
        if (convertView == null) {
          convertView = inflater.inflate(R.layout.listrow_details, null);
        }
        text = (CheckedTextView) convertView.findViewById(R.id.detail_textView1);
        text.setText(children);

        convertView.setOnClickListener(new OnClickListener() {
          @Override
          public void onClick(View v) {
              //Integer lol = (Integer) v.getTag();
              ((CheckedTextView )v).toggle();
          }
        });
        return convertView;
      }

      @Override
      public int getChildrenCount(int groupPosition) {
        return groups.get(groupPosition).children.size();
      }

      @Override
      public Object getGroup(int groupPosition) {
        return groups.get(groupPosition);
      }

      @Override
      public int getGroupCount() {
        return groups.size();
      }

      @Override
      public void onGroupCollapsed(int groupPosition) {
        super.onGroupCollapsed(groupPosition);
      }

      @Override
      public void onGroupExpanded(int groupPosition) {
        super.onGroupExpanded(groupPosition);
      }

      @Override
      public long getGroupId(int groupPosition) {
        return 0;
      }

      @Override
      public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        if (convertView == null) {
          convertView = inflater.inflate(R.layout.listrow_group, null);
        }
        Groupx group = (Groupx) getGroup(groupPosition);
        ((CheckedTextView) convertView).setText(group.stringx.toString());
        ((CheckedTextView) convertView).setChecked(isExpanded);
        return convertView;
      }

      @Override
      public boolean hasStableIds() {
        return false;
      }

      @Override
      public boolean isChildSelectable(int groupPosition, int childPosition) {
        return false;
      }
    } 

Answer 1

这是由于对ListView行回收的误解而经常出现的问题。

事实是，您只在 View 中保留选中的属性。现在，ListView 重用从屏幕上消失的单元格以节省内存，因此，一旦检查了一行，一旦原始行被回收，另一行也会显示为已检查。

要避免这种情况，您必须在 ListView 的数据源中保存检查状态，并在您的 ListView 适配器中设置适当的检查值。