二级菜单---ExpandableListView

ExpandableListView: 需要继承 BaseExpandableListAdapter 设置适配器

默认有下拉收缩箭头，可以自定义样式-- android:state_expanded = "true"

注意如果子类布局中如：checkbox 的要设置不获取焦点，否则可能会点击组无效

<ExpandableListView        android:id="@+id/grow_scgrade_exlist"        android:layout_width="match_parent"       <span style="color:#993300;"> <strong>android:groupIndicator="@null"</strong></span>        android:layout_height="match_parent" >    </ExpandableListView>

父类布局

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="vertical" >    <TextView        android:id="@+id/item_grow_parent_txt"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:paddingBottom="5dp"        android:paddingLeft="10dp"        android:paddingTop="5dp"        android:textSize="20sp" /></LinearLayout>

子类布局

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="vertical" >    <TextView        android:id="@+id/item_grow_child_txt"        android:layout_width="match_parent"        android:layout_height="wrap_content"         android:paddingLeft="10dp"        android:paddingTop="5dp"        android:paddingBottom="5dp"        android:textSize="18sp" /></LinearLayout>

public class MyExpandAdapter extends BaseExpandableListAdapter {private List<String> parent = new ArrayList<String>();private List<List<String>> child = new ArrayList<List<String>>();private LayoutInflater inflater;<span style="white-space:pre"></span>//设置数据源public void setData(List<String> parent, List<List<String>> child) {this.parent = parent;this.child = child;notifyDataSetChanged();}public MyExpandAdapter(Context context) {inflater = LayoutInflater.from(context);}@Overridepublic int getGroupCount() {return parent.size();}@Overridepublic int getChildrenCount(int groupPosition) {return child.get(groupPosition).size();}@Overridepublic Object getGroup(int groupPosition) {return parent.get(groupPosition);}@Overridepublic Object getChild(int groupPosition, int childPosition) {return child.get(groupPosition).get(childPosition);}@Overridepublic long getGroupId(int groupPosition) {return groupPosition;}@Overridepublic long getChildId(int groupPosition, int childPosition) {return childPosition;}@Overridepublic boolean hasStableIds() {return false;}/* * 父类布局 */@Overridepublic View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {TextView txt;if (convertView == null) {convertView = inflater.inflate(R.layout.item_grow_grade1_layout, parent, false);txt = (TextView) convertView.findViewById(R.id.item_grow_parent_txt);convertView.setTag(R.id.item_grow_parent_txt, txt);} else {txt = (TextView) convertView.getTag(R.id.item_grow_parent_txt);}txt.setText((CharSequence) getGroup(groupPosition));return convertView;}/* * 子类布局 */@Overridepublic View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {TextView txt;if (convertView == null) {convertView = inflater.inflate(R.layout.item_grow_grade2_layout, null);txt = (TextView) convertView.findViewById(R.id.item_grow_child_txt);convertView.setTag(R.id.item_grow_child_txt, txt);} else {txt = (TextView) convertView.getTag(R.id.item_grow_child_txt);}txt.setText((String) getChild(groupPosition, childPosition));return convertView;}@Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) {return true;}}

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