加上checkbox，需求大抵都是：check group, check all his children; if one’ group’s children all checked, group become checked. ExpandableListView的选中状态没有类似SparseBooleanArray的东东，需要自己维护一个数据结构. 开发上要求点group list item的大多数区域是expand/collapse,仅点checkbox区域是勾选，而点child list item的任意区域都是勾选效果, 可以让列表setOnChildClickListener()。注意ExpandableListAdapter的isChildSelectable()方法一定返回true。
编辑自?p=3644. 给出干货:
EListAdapter.java
package com.example.checkableexpandablelistview;import java.util.ArrayList;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.BaseExpandableListAdapter;import android.widget.CheckBox;import android.widget.ExpandableListView;import android.widget.TextView;import com.example.aexpandablelist.R;public class EListAdapter extends BaseExpandableListAdapter implements ExpandableListView.OnChildClickListener { private Context context; private ArrayList<Group> groups; public EListAdapter(Context context, ArrayList<Group> groups) { this.context = context; this.groups = groups; } public Object getChild(int groupPosition, int childPosition) { return groups.get(groupPosition).getChildItem(childPosition); } public long getChildId(int groupPosition, int childPosition) { return childPosition; } public int getChildrenCount(int groupPosition) { return groups.get(groupPosition).getChildrenCount(); } public Object getGroup(int groupPosition) { return groups.get(groupPosition); } public int getGroupCount() { return groups.size(); } public long getGroupId(int groupPosition) { return groupPosition; } public boolean hasStableIds() { return true; } public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } /** 設定 Group 資料 */ public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { Group group = (Group) getGroup(groupPosition); if (convertView == null) { LayoutInflater infalInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = infalInflater.inflate(R.layout.group_layout, null); } TextView tv = (TextView) convertView.findViewById(R.id.tvGroup); tv.setText(group.getTitle()); // 重新產生 CheckBox 時，將存起來的 isChecked 狀態重新設定 CheckBox checkBox = (CheckBox) convertView.findViewById(R.id.chbGroup); checkBox.setChecked(group.getChecked()); // 點擊 CheckBox 時，將狀態存起來 checkBox.setOnClickListener(new Group_CheckBox_Click(groupPosition)); return convertView; } /** 勾選 Group CheckBox 時，存 Group CheckBox 的狀態，以及改變 Child CheckBox 的狀態 */ class Group_CheckBox_Click implements OnClickListener { private int groupPosition; Group_CheckBox_Click(int groupPosition) { this.groupPosition = groupPosition; } public void onClick(View v) { groups.get(groupPosition).toggle(); // 將 Children 的 isChecked 全面設成跟 Group 一樣 int childrenCount = groups.get(groupPosition).getChildrenCount(); boolean groupIsChecked = groups.get(groupPosition).getChecked(); for (int i = 0; i < childrenCount; i++) groups.get(groupPosition).getChildItem(i).setChecked(groupIsChecked); // 注意，，一定要通知 ExpandableListView 資料已經改變，ExpandableListView 會重新產生畫面 notifyDataSetChanged(); } } /** 設定 Children 資料 */ public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { Child child = groups.get(groupPosition).getChildItem(childPosition); if (convertView == null) { LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflater.inflate(R.layout.child_layout, null); } TextView tv = (TextView) convertView.findViewById(R.id.tvChild); tv.setText(child.getFullname()); // 重新產生 CheckBox 時，將存起來的 isChecked 狀態重新設定 CheckBox checkBox = (CheckBox) convertView.findViewById(R.id.chbChild); checkBox.setChecked(child.getChecked()); // 點擊 CheckBox 時，將狀態存起來 checkBox.setOnClickListener(new Child_CheckBox_Click(groupPosition, childPosition)); return convertView; } /** 勾選 Child CheckBox 時，存 Child CheckBox 的狀態 */ class Child_CheckBox_Click implements OnClickListener { private int groupPosition; private int childPosition; Child_CheckBox_Click(int groupPosition, int childPosition) { this.groupPosition = groupPosition; this.childPosition = childPosition; } public void onClick(View v) { handleClick(childPosition, groupPosition); } } public void handleClick(int childPosition, int groupPosition) { groups.get(groupPosition).getChildItem(childPosition).toggle(); // 檢查 Child CheckBox 是否有全部勾選，以控制 Group CheckBox int childrenCount = groups.get(groupPosition).getChildrenCount(); boolean childrenAllIsChecked = true; for (int i = 0; i < childrenCount; i++) { if (!groups.get(groupPosition).getChildItem(i).getChecked()) childrenAllIsChecked = false; } groups.get(groupPosition).setChecked(childrenAllIsChecked); // 注意，一定要通知 ExpandableListView 資料已經改變，ExpandableListView 會重新產生畫面 notifyDataSetChanged(); } @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { handleClick(childPosition, groupPosition); return true; } }如果发现错了，一定要止步.
