ExpandableListView 使用方法

效果图：

布局文件：expandable_list_view.xml

<?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="match_parent"
    android:orientation="vertical">

    <include layout="@layout/title_layout"/>

    <ExpandableListView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:id="@+id/expandable_list"></ExpandableListView>

</LinearLayout>

自定义适配器：MyExpandableListAdapter.java

public class MyExpandableListAdapter implements ExpandableListAdapter {

    private Context context = null;

    private String[] group = null;

    private List<String[]> child = null;

    public MyExpandableListAdapter(Context context, String[] group, List<String[]> child){
        this.context = context;
        this.group = group;
        this.child = child;
    }

    @Override
    public void registerDataSetObserver(DataSetObserver observer) {

    }

    @Override
    public void unregisterDataSetObserver(DataSetObserver observer) {

    }

    @Override
    public int getGroupCount() {
        return group.length;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return child.get(groupPosition).length;
    }

    @Override
    public Object getGroup(int groupPosition) {
        return group[groupPosition];
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        return child.get(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 false;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        String str = group[groupPosition];

        AbsListView.LayoutParams layoutParams = new AbsListView.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        TextView text = new TextView(context);
        text.setLayoutParams(layoutParams);
        text.setPadding(30,15,0,15);
        text.setText(str);
        text.setTextSize(20f);
        return text;
    }

    @Override
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
        String str = child.get(groupPosition)[childPosition];

        AbsListView.LayoutParams layoutParams = new AbsListView.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        TextView text = new TextView(context);
        text.setLayoutParams(layoutParams);
        text.setText(str);
        text.setTextSize(18f);
        text.setPadding(15, 10, 15, 10);

        return text;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }

    @Override
    public boolean areAllItemsEnabled() {
        return true;
    }

    @Override
    public boolean isEmpty() {
        return (group == null || group.length < 1);
    }

    @Override
    public void onGroupExpanded(int groupPosition) {

    }

    @Override
    public void onGroupCollapsed(int groupPosition) {

    }

    @Override
    public long getCombinedChildId(long groupId, long childId) {
        return 0;
    }

    @Override
    public long getCombinedGroupId(long groupId) {
        return 0;
    }
}

Activity文件：ExpandableListViewActivity.java

public class ExpandableListViewActivity extends Activity {

    private ExpandableListView listView;
    private ExpandableListAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.expandable_list_view);

        /**
         * 初始化数据
         */
        String[] group = {"列表一","列表二","列表三"};
        String[] item = { "子列表一","子列表二","子列表三"};
        List<String[]> child = new ArrayList<>();
        for (int i=0;i<group.length;i++){
            child.add(item);
        }

        adapter = new MyExpandableListAdapter(this, group, child);

        listView = (ExpandableListView)findViewById(R.id.expandable_list);
        listView.setAdapter(adapter);

        /**
         * 设置ExpandableListView中图标的位置到右边
         */
        int windowWidth = getWindowManager().getDefaultDisplay().getWidth();
        listView.setIndicatorBounds(windowWidth - 50, windowWidth - 30);

        /**
         * 设置自动收缩其他的group
         */
        listView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
            @Override
            public void onGroupExpand(int groupPosition) {
                for (int i=0;i<adapter.getGroupCount();i++){
                    if (groupPosition != i){
                        listView.collapseGroup(i);
                    }
                }
            }
        });
    }
}