二级列表

一、Mactivity的Xml中

<<span style="color:#000080;font-weight:bold;">ExpandableListView
android:id="@+id/mExpandableView"

android:layout_width="match_parent"
android:layout_height="wrap_content"
android:dividerHeight="10dp"
android:divider="#ff00ff"
>

二、Mactivity中

public class MainActivity extends AppCompatActivity {

private ExpandableListView mExpandableView;
private ArrayList mGroup =new ArrayList<>();
private ArrayList> mChild = new ArrayList<>() ;
private MyAdapter myAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initDate();
myAdapter = new MyAdapter(mGroup, mChild, MainActivity.this);
mExpandableView.setAdapter(myAdapter);
}

private void initDate() {
mGroup.add("我的家人");
mGroup.add("我的朋友");
mGroup.add("我的情人");


mChild = new ArrayList<>();
ArrayList mList = new ArrayList<>();
mList.add("红红");
mList.add("黄欢");
mList.add("屡屡");
mChild.add(mList);
// mList.clear();
mList = new ArrayList<>();
mList.add("红红");
mList.add("黄欢");
mList.add("屡屡");
mChild.add(mList);
// mList.clear();
mList = new ArrayList<>();
mList.add("红红");
mList.add("黄欢");
mList.add("屡屡");
mChild.add(mList);
}

private void initView() {
mExpandableView = (ExpandableListView) findViewById(R.id.mExpandableView);
}
}

三、适配器

public class MyAdapter extends BaseExpandableListAdapter {

private ArrayList mGroup;
private ArrayList> mChild;
private Context context;

public MyAdapter(ArrayList mGroup, ArrayList> mChild, Context context) {
this.mGroup = mGroup;
this.mChild = mChild;
this.context = context;
}

@Override
public int getGroupCount() {
return mGroup.size();
}

@Override
public int getChildrenCount(int groupPosition) {
return mChild.get(groupPosition).size();
}

@Override
public Object getGroup(int groupPosition) {
return null;
}

@Override
public Object getChild(int groupPosition, int childPosition) {
return null;
}

@Override
public long getGroupId(int groupPosition) {
return 0;
}

@Override
public long getChildId(int groupPosition, int childPosition) {
return 0;
}

@Override
public boolean hasStableIds() {
return false;
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
convertView = LayoutInflater.from(context).inflate(R.layout.item1, null);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.mTv1.setText(mGroup.get(groupPosition));
return convertView;
}

@Override
public View getChildView(int groupPosition, int childPosition, booleanisLastChild, View convertView2, ViewGroup parent) {
ViewHolder2 holder2 = null;
if (convertView2 == null) {
convertView2 = LayoutInflater.from(context).inflate(R.layout.item2, null);
holder2 = new ViewHolder2(convertView2);
convertView2.setTag(holder2);
} else {
holder2 = (ViewHolder2) convertView2.getTag();
}
holder2.mTv2.setText(mChild.get(groupPosition).get(childPosition));

return convertView2;
}

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


public static class ViewHolder {
public View rootView;
public TextView mTv1;

public ViewHolder(View rootView) {
this.rootView = rootView;
this.mTv1 = (TextView) rootView.findViewById(R.id.mTv1);
}

}

class ViewHolder2 {
public View rootView;
public ImageView mImage;
public TextView mTv2;

public ViewHolder2(View rootView) {
this.rootView = rootView;
this.mImage = (ImageView) rootView.findViewById(R.id.mImage);
this.mTv2 = (TextView) rootView.findViewById(R.id.mTv2);
}

}
}

四、适配器Xml中

随便写一个带一个Textview的和一个带两个或者多个的TextView的xml即可！！！