Question

我可以在expandablelistview中实现checkedtextview。但是当我检查某个子项时，其他父项的一些子项也被选中。我无法弄清楚为什么我会遇到这样的问题？任何人都面临类似的情况？提前感谢您的帮助。

编辑：

正如我所建议的那样，我在customadapter中创建了布尔多维数组：`

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来切换我的值。

编辑2：我正在尝试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

由于对ListView行回收的误解，这是一个经常出现的问题。

问题是，您只在视图中保留checked属性。现在，ListView重新使用从屏幕上消失以保存内存的单元格，因此，一旦检查了一行，一旦原始的一行被回收，另一个也将被检查。

为避免这种情况，您必须将已检查状态保存在ListView数据源中，并在ListView适配器中设置相应的选中值。

Answer 2

在xml中设置singlechoicemode：true。

Answer 3

使用以下覆盖BaseExpandableListAdapter

中的方法

public int getChildType(int groupPosition, int childPosition) {
 //define a condition here to differentiate between your child views.
}

public int getChildTypeCount() {
 return 2; <-- this is the number of views for your child
}

希望这会有所帮助。

折叠/展开可扩展列表视图会更改checkedtextview中随机子项的切换

3 个答案: