ExpandableListView 使用示例

MainActivity：

public class Expandable_test extends Activity {    private ExpandableListView listView;    private Map<String, List<String>> dataset = new HashMap<>();    private String[] parentList = new String[]{"第一个菜单", "第二个菜单"};    private ExpandableListViewAdpter adpter;    private Context mContext = this;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_expandable_test);        listView=(ExpandableListView)findViewById(R.id.expandableListViewtext);        adpter=new ExpandableListViewAdpter(this,parentList);        listView.setAdapter(adpter);    }}

MainActivity.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.fae.mobile.testActivity.Expandable_test"><ExpandableListView    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:id="@+id/expandableListViewtext"></ExpandableListView></LinearLayout>

ExpandableListViewAdpter:

public class ExpandableListViewAdpter extends BaseExpandableListAdapter {    private Context mContext;    private Map<String, List<String>> dataset = new HashMap<>();    private String[] parentList = new String[]{"第一个菜单", "第二个菜单"};    private String[][] chdrenList=new String[][]            {{"菜单1","菜单1","菜单1","菜单1","菜单1","菜单1"},{"菜单2","菜单2","菜单2","菜单2","菜单2"}};    public ExpandableListViewAdpter(Context context, String[] parentList){        this.mContext=context;        this.dataset=dataset;        this.parentList=parentList;    }    @Override    public int getGroupCount() {        return parentList.length;    }    @Override    public int getChildrenCount(int groupPosition) {        return chdrenList[groupPosition].length;    }    @Override    public Object getGroup(int groupPosition) {        return parentList[groupPosition];    }    @Override    public Object getChild(int groupPosition, int childPosition) {        return chdrenList[groupPosition][childPosition];    }    @Override    public long getGroupId(int groupPosition) {        return groupPosition;    }    @Override    public long getChildId(int groupPosition, int childPosition) {        return childPosition;    }    @Override    public boolean hasStableIds() {        return true;    }    @Override    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {       GroupViewHolder holder=null;        if(convertView==null){            convertView = LayoutInflater.from(mContext).inflate(R.layout.itemlayoutexpandable, null);            holder=new GroupViewHolder();            holder.text=(TextView)convertView.findViewById(R.id.item_text);            convertView.setTag(holder);        }        else {            holder=(GroupViewHolder)convertView.getTag();        }        holder.text.setText(parentList[groupPosition]);        return convertView;    }    @Override    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {       ChildViewHolder holder=null;            if(convertView==null){                convertView = LayoutInflater.from(mContext).inflate(R.layout.itemlayoutexpandable, null);                holder=new ChildViewHolder();                holder.text=(TextView)convertView.findViewById(R.id.item_text);                convertView.setTag(holder);        }        else {                holder=(ChildViewHolder)convertView.getTag();            }            holder.text.setText(chdrenList[groupPosition][childPosition]);        return convertView;    }    @Override    public boolean isChildSelectable(int groupPosition, int childPosition) {        return true;    }    class GroupViewHolder {        TextView text;    }    class ChildViewHolder {        TextView text;    }}

Item.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"><TextView    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:gravity="bottom"    android:id="@+id/item_text"/></LinearLayout>