Android ExpandableListView双层嵌套实现三级树形菜单

/** * @author Apathy、恒 *  *   子ExpandableListView展开时，因为group只有一项，所以子ExpandableListView的总高度= *   （子ExpandableListView的child数量 + 1 ）* 每一项的高度 * */ eListView.setOnGroupExpandListener(new OnGroupExpandListener() {   @Override   public void onGroupExpand(int groupPosition) {  LayoutParams lp = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,       (child.getChildNames().size() + 1)* (int) mContext.getResources().getDimension(R.dimen.parent_expandable_list_height)); eListView.setLayoutParams(lp); } });  /** * @author Apathy、恒 *  * 子ExpandableListView关闭时，此时只剩下group这一项，所以子ExpandableListView的总高度即为一项的高度 * */ eListView.setOnGroupCollapseListener(new OnGroupCollapseListener() { @Override public void onGroupCollapse(int groupPosition) {  LayoutParams lp = new LayoutParams(  ViewGroup.LayoutParams.MATCH_PARENT, (int) mContext  .getResources().getDimension(   R.dimen.parent_expandable_list_height)); eListView.setLayoutParams(lp); } });

/** * @author Apathy、恒 *  *   点击子ExpandableListView子项时，调用回调接口 * */ eListView.setOnChildClickListener(new OnChildClickListener() {  @Override public boolean onChildClick(ExpandableListView arg0, View arg1,  int groupIndex, int childIndex, long arg4) {  if (mTreeViewClickListener != null) {   mTreeViewClickListener.onClickPosition(groupPosition,  childPosition, childIndex); } return false; } });

package com.heng.tree; import java.util.ArrayList; import com.heng.tree.R;import com.heng.tree.adapter.ParentAdapter;import com.heng.tree.adapter.ParentAdapter.OnChildTreeViewClickListener;import com.heng.tree.entity.ChildEntity;import com.heng.tree.entity.ParentEntity; import android.app.Activity;import android.content.Context;import android.graphics.Color;import android.os.Bundle;import android.widget.ExpandableListView;import android.widget.ExpandableListView.OnGroupExpandListener;import android.widget.Toast; /** *  * @author Apathy、恒 *  * <br/> *  * @email shexiaoheng@163.com *  * @blog * <a href='http://blog.csdn.net/shexiaoheng'>http://blog.csdn.net/shexiaoheng</a > *  * <br/> * <br/> *  * @Detail 本Demo为ExpandableListView嵌套ExpandableListView实现三级菜单的例子 *  * #ParentAdapter.OnChildTreeViewClickListener *  * */public class MainActivity extends Activity implements OnGroupExpandListener, OnChildTreeViewClickListener {  private Context mContext;  private ExpandableListView eList;  private ArrayList<ParentEntity> parents;  private ParentAdapter adapter;  @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);  mContext = this;  setContentView(R.layout.activity_main);  loadData();  initEList();  }  /** * @author Apathy、恒 *  *   初始化菜单数据源 * */ private void loadData() {  parents = new ArrayList<ParentEntity>();  for (int i = 0; i < 10; i++) {  ParentEntity parent = new ParentEntity();  parent.setGroupName("父类父分组第" + i + "项");  parent.setGroupColor(getResources().getColor(  android.R.color.holo_red_light));  ArrayList<ChildEntity> childs = new ArrayList<ChildEntity>();  for (int j = 0; j < 8; j++) {  ChildEntity child = new ChildEntity();  child.setGroupName("子类父分组第" + j + "项");  child.setGroupColor(Color.parseColor("#ff00ff"));  ArrayList<String> childNames = new ArrayList<String>();  ArrayList<Integer> childColors = new ArrayList<Integer>();  for (int k = 0; k < 5; k++) {   childNames.add("子类第" + k + "项");   childColors.add(Color.parseColor("#ff00ff"));  }  child.setChildNames(childNames);  childs.add(child);  }  parent.setChilds(childs);  parents.add(parent);  } }  /** * @author Apathy、恒 *  *   初始化ExpandableListView * */ private void initEList() {  eList = (ExpandableListView) findViewById(R.id.eList);  eList.setOnGroupExpandListener(this);  adapter = new ParentAdapter(mContext, parents);  eList.setAdapter(adapter);  adapter.setOnChildTreeViewClickListener(this);  }  /** * @author Apathy、恒 *  *   点击子ExpandableListView的子项时，回调本方法，根据下标获取值来做相应的操作 * */ @Override public void onClickPosition(int parentPosition, int groupPosition, int childPosition) { // do something String childName = parents.get(parentPosition).getChilds() .get(groupPosition).getChildNames().get(childPosition) .toString(); Toast.makeText( mContext, "点击的下标为： parentPosition=" + parentPosition  + " groupPosition=" + groupPosition  + " childPosition=" + childPosition + "/n点击的是："  + childName, Toast.LENGTH_SHORT).show(); }  /** * @author Apathy、恒 *  *   展开一项，关闭其他项，保证每次只能展开一项 * */ @Override public void onGroupExpand(int groupPosition) { for (int i = 0; i < parents.size(); i++) { if (i != groupPosition) { eList.collapseGroup(i); } } } }

package com.heng.tree.adapter; import java.util.ArrayList; import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseExpandableListAdapter;import android.widget.ExpandableListView;import android.widget.ExpandableListView.OnChildClickListener;import android.widget.ExpandableListView.OnGroupCollapseListener;import android.widget.ExpandableListView.OnGroupExpandListener;import android.widget.AbsListView.LayoutParams;import android.widget.TextView; import com.heng.tree.R;import com.heng.tree.entity.ChildEntity;import com.heng.tree.entity.ParentEntity; /** *  * @author Apathy、恒 *  *   父类分组的适配器 *  * <br/> * <br/> *  *   方法 {@link #getChildView(int, int, boolean, View, ViewGroup)}<b><font *   color='#ff00ff' size='2'>极其重要</font></b> *  * */ public class ParentAdapter extends BaseExpandableListAdapter {  private Context mContext;// 上下文  private ArrayList<ParentEntity> mParents;// 数据源  private OnChildTreeViewClickListener mTreeViewClickListener;// 点击子ExpandableListView子项的监听  public ParentAdapter(Context context, ArrayList<ParentEntity> parents) { this.mContext = context; this.mParents = parents; }  @Override public ChildEntity getChild(int groupPosition, int childPosition) { return mParents.get(groupPosition).getChilds().get(childPosition); }  @Override public long getChildId(int groupPosition, int childPosition) { return childPosition; }  @Override public int getChildrenCount(int groupPosition) { return mParents.get(groupPosition).getChilds() != null ? mParents .get(groupPosition).getChilds().size() : 0; }  @Override public View getChildView(final int groupPosition, final int childPosition, boolean isExpanded, View convertView, ViewGroup parent) {  final ExpandableListView eListView = getExpandableListView();  ArrayList<ChildEntity> childs = new ArrayList<ChildEntity>();  final ChildEntity child = getChild(groupPosition, childPosition);  childs.add(child);  final ChildAdapter childAdapter = new ChildAdapter(this.mContext, childs);  eListView.setAdapter(childAdapter);  /** * @author Apathy、恒 *  *   点击子ExpandableListView子项时，调用回调接口 * */ eListView.setOnChildClickListener(new OnChildClickListener() {  @Override public boolean onChildClick(ExpandableListView arg0, View arg1,  int groupIndex, int childIndex, long arg4) {  if (mTreeViewClickListener != null) {   mTreeViewClickListener.onClickPosition(groupPosition,  childPosition, childIndex); } return false; } });   /** * @author Apathy、恒 *  *   子ExpandableListView展开时，因为group只有一项，所以子ExpandableListView的总高度= *   （子ExpandableListView的child数量 + 1 ）* 每一项的高度 * */ eListView.setOnGroupExpandListener(new OnGroupExpandListener() { @Override public void onGroupExpand(int groupPosition) {  LayoutParams lp = new LayoutParams(  ViewGroup.LayoutParams.MATCH_PARENT, (child  .getChildNames().size() + 1)  * (int) mContext.getResources().getDimension(   R.dimen.parent_expandable_list_height)); eListView.setLayoutParams(lp); } });  /** * @author Apathy、恒 *  *   子ExpandableListView关闭时，此时只剩下group这一项， *   所以子ExpandableListView的总高度即为一项的高度 * */ eListView.setOnGroupCollapseListener(new OnGroupCollapseListener() { @Override public void onGroupCollapse(int groupPosition) {  LayoutParams lp = new LayoutParams(  ViewGroup.LayoutParams.MATCH_PARENT, (int) mContext  .getResources().getDimension(   R.dimen.parent_expandable_list_height)); eListView.setLayoutParams(lp); } }); return eListView;  }  /** * @author Apathy、恒 *  *   动态创建子ExpandableListView * */ public ExpandableListView getExpandableListView() { ExpandableListView mExpandableListView = new ExpandableListView( mContext); LayoutParams lp = new LayoutParams( ViewGroup.LayoutParams.MATCH_PARENT, (int) mContext  .getResources().getDimension(  R.dimen.parent_expandable_list_height)); mExpandableListView.setLayoutParams(lp); mExpandableListView.setDividerHeight(0);// 取消group项的分割线 mExpandableListView.setChildDivider(null);// 取消child项的分割线 mExpandableListView.setGroupIndicator(null);// 取消展开折叠的指示图标 return mExpandableListView; }  @Override public Object getGroup(int groupPosition) { return mParents.get(groupPosition); }  @Override public int getGroupCount() { return mParents != null ? mParents.size() : 0; }  @Override public long getGroupId(int groupPosition) { return groupPosition; }  @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { GroupHolder holder = null; if (convertView == null) { convertView = LayoutInflater.from(mContext).inflate(  R.layout.parent_group_item, null); holder = new GroupHolder(convertView); convertView.setTag(holder); } else { holder = (GroupHolder) convertView.getTag(); } holder.update(mParents.get(groupPosition)); return convertView; }  /** * @author Apathy、恒 *  *   Holder优化 * */ class GroupHolder {  private TextView parentGroupTV;  public GroupHolder(View v) { parentGroupTV = (TextView) v.findViewById(R.id.parentGroupTV); }  public void update(ParentEntity model) { parentGroupTV.setText(model.getGroupName()); parentGroupTV.setTextColor(model.getGroupColor()); } }  @Override public boolean hasStableIds() { return false; }  @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return false; }  /** * @author Apathy、恒 *  *   设置点击子ExpandableListView子项的监听 * */ public void setOnChildTreeViewClickListener( OnChildTreeViewClickListener treeViewClickListener) { this.mTreeViewClickListener = treeViewClickListener; }  /** * @author Apathy、恒 *  *   点击子ExpandableListView子项的回调接口 * */ public interface OnChildTreeViewClickListener {  void onClickPosition(int parentPosition, int groupPosition, int childPosition); } }

package com.heng.tree.adapter; import java.util.ArrayList; import com.heng.tree.R;import com.heng.tree.entity.ChildEntity; import android.content.Context;import android.graphics.Color;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseExpandableListAdapter;import android.widget.TextView; /** *  * @author Apathy、恒 *  * <br/> * <br/> *  *   子类分组的适配器 *  * <br/> * <br/> *  *   方法{@link #isChildSelectable(int,int)} <b><font color='#ff00ff' *   size='2'>必须返回true</font></b> *  * */public class ChildAdapter extends BaseExpandableListAdapter {  private Context mContext;// 上下文  private ArrayList<ChildEntity> mChilds;// 数据源  public ChildAdapter(Context context, ArrayList<ChildEntity> childs) { this.mContext = context; this.mChilds = childs; }  @Override public int getChildrenCount(int groupPosition) { return mChilds.get(groupPosition).getChildNames() != null ? mChilds .get(groupPosition).getChildNames().size() : 0; }  @Override public String getChild(int groupPosition, int childPosition) { if (mChilds.get(groupPosition).getChildNames() != null && mChilds.get(groupPosition).getChildNames().size() > 0) return mChilds.get(groupPosition).getChildNames()  .get(childPosition).toString(); return null; }  @Override public long getChildId(int groupPosition, int childPosition) { return childPosition; }  @Override public View getChildView(int groupPosition, int childPosition, boolean isExpanded, View convertView, ViewGroup parent) { ChildHolder holder = null; if (convertView == null) { convertView = LayoutInflater.from(mContext).inflate(  R.layout.child_child_item, null); holder = new ChildHolder(convertView); convertView.setTag(holder); } else { holder = (ChildHolder) convertView.getTag(); } holder.update(getChild(groupPosition, childPosition)); return convertView; }  /** * @author Apathy、恒 *  *   Holder优化 * */ class ChildHolder {  private TextView childChildTV;  public ChildHolder(View v) { childChildTV = (TextView) v.findViewById(R.id.childChildTV); }  public void update(String str) { childChildTV.setText(str); childChildTV.setTextColor(Color.parseColor("#00ffff")); } }  @Override public Object getGroup(int groupPosition) { if (mChilds != null && mChilds.size() > 0) return mChilds.get(groupPosition); return null; }  @Override public int getGroupCount() { return mChilds != null ? mChilds.size() : 0; }  @Override public long getGroupId(int groupPosition) { return groupPosition; }  @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { GroupHolder holder = null; if (convertView == null) { convertView = LayoutInflater.from(mContext).inflate(  R.layout.child_group_item, null); holder = new GroupHolder(convertView); convertView.setTag(holder); } else { holder = (GroupHolder) convertView.getTag(); } holder.update(mChilds.get(groupPosition)); return convertView; }  /** * @author Apathy、恒 *  *   Holder优化 * */ class GroupHolder {  private TextView childGroupTV;  public GroupHolder(View v) { childGroupTV = (TextView) v.findViewById(R.id.childGroupTV); }  public void update(ChildEntity model) { childGroupTV.setText(model.getGroupName()); childGroupTV.setTextColor(model.getGroupColor()); } }  @Override public boolean hasStableIds() { return false; }  @Override public boolean isChildSelectable(int groupPosition, int childPosition) { /** * ============================================== * 此处必须返回true，否则无法响应子项的点击事件=============== * ============================================== **/ return true; } }

package com.heng.tree.adapter; import java.util.ArrayList; import com.heng.tree.R;import com.heng.tree.entity.ChildEntity; import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView; /** *  * @author Apathy、恒 *  *   子类子类列表的适配器 *  * */public class CListAdapter extends BaseAdapter {  private Context mContext; private ArrayList<ChildEntity> mChilds;  public CListAdapter(Context context, ArrayList<ChildEntity> childs) { this.mContext = context; this.mChilds = childs; }  @Override public int getCount() { return mChilds != null ? mChilds.size() : 0; }  @Override public Object getItem(int position) { if ((getCount() > 0) && (position > 0 && position < mChilds.size())) { return mChilds.get(position); } return null; }  @Override public long getItemId(int position) { return position; }  @Override public View getView(int position, View convertView, ViewGroup parent) { Holder holder = null; if (convertView == null) { convertView = LayoutInflater.from(mContext).inflate(  R.layout.child_child_item, null); holder = new Holder(convertView); convertView.setTag(holder); } else { holder = (Holder) convertView.getTag(); } holder.update(mChilds.get(position).getGroupName()); return convertView; }  class Holder {  private TextView tv;  public Holder(View v) { tv = (TextView) v.findViewById(R.id.childChildTV); }  public void update(String text) { tv.setText(text); } }}

package com.heng.tree.entity; import java.util.ArrayList; /** *  * @author Apathy、恒 *  *   子类分组的实体 *  * */ public class ParentEntity {  private int groupColor;  private String groupName;  private ArrayList<ChildEntity> childs;   /* ========================================================== * ======================= get method ======================= * ========================================================== */  public int getGroupColor() { return groupColor; }  public String getGroupName() { return groupName; }  public ArrayList<ChildEntity> getChilds() { return childs; }  /* ========================================================== * ======================= set method ======================= * ========================================================== */  public void setGroupColor(int groupColor) { this.groupColor = groupColor; }  public void setGroupName(String groupName) { this.groupName = groupName; }  public void setChilds(ArrayList<ChildEntity> childs) { this.childs = childs; } }

package com.heng.tree.entity; import java.util.ArrayList; /** *  * @author Apathy、恒 *  *   父类分组的实体 *  * */ public class ChildEntity {  private int groupColor;  private String groupName;  private ArrayList<String> childNames;   /* ========================================================== * ======================= get method ======================= * ========================================================== */  public int getGroupColor() { return groupColor; }  public String getGroupName() { return groupName; }  public ArrayList<String> getChildNames() { return childNames; }  /* ========================================================== * ======================= set method ======================= * ========================================================== */  public void setGroupColor(int groupColor) { this.groupColor = groupColor; }  public void setGroupName(String groupName) { this.groupName = groupName; }  public void setChildNames(ArrayList<String> childNames) { this.childNames = childNames; } }

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" >  <ExpandableListView  android:id="@+id/eList"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:groupIndicator="@null" /> </FrameLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingLeft="@dimen/parent_expandable_list_group_padding_left" >  <TextView  android:id="@+id/parentGroupTV"  android:layout_width="wrap_content"  android:layout_height="@dimen/parent_expandable_list_height"  android:gravity="center_vertical" /> </RelativeLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" >  <RelativeLayout  android:layout_width="match_parent"  android:layout_height="@dimen/parent_expandable_list_height" >   <TextView   android:id="@+id/childGroupTV"   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:layout_centerVertical="true"   android:paddingLeft="@dimen/child_expandable_list_group_padding_left" /> </RelativeLayout> </LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" >  <RelativeLayout  android:layout_width="match_parent"  android:layout_height="@dimen/parent_expandable_list_height" >   <TextView   android:id="@+id/childChildTV"   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:layout_centerVertical="true"   android:paddingLeft="@dimen/child_expandable_list_child_padding_left" /> </RelativeLayout> </LinearLayout>

<resources>  <!-- Default screen margins, per the Android Design guidelines. --> <dimen name="parent_expandable_list_height">50dp</dimen> <dimen name="parent_expandable_list_group_padding_left">10dp</dimen> <dimen name="child_expandable_list_group_padding_left">40dp</dimen> <dimen name="child_expandable_list_child_padding_left">75dp</dimen> </resources>