[
 {
 "letter": "A",
 "cities": [
  "安庆",
  "安徽",
  "安全"
 ]
 },
 {
 "letter": "B",
 "cities": [
  "包头",
  "宝钢",
  "渤海",
  "本溪",
  "蚌埠"
 ]
 },
 {
 "letter": "C",
 "cities": [
  "长春",
  "长城",
  "长沙",
  "常州",
  "郴州",
  "重庆"
 ]
 },
 {
 "letter": "D",
 "cities": [
  "东莞",
  "东山",
  "大连",
  "大庆"
 ]
 }
]

public class StringBean {
 String letter;
 String city;
 int type;
 public String getLetter() {
  return letter;
 }
 public void setLetter(String letter) {
  this.letter = letter;
 }
 public String getCity() {
  return city;
 }
 public void setCity(String city) {
  this.city = city;
 }
 public int getType() {
  return type;
 }
 public void setType(int type) {
  this.type = type;
 }
 @Override
 public String toString() {
  return "StringBean{" +
    "letter='" + letter + '\'' +
    ", city='" + city + '\'' +
    ", type=" + type +
    '}';
 }
}

<?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">
 <TextView
  android:id="@+id/tvType"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:background="#999"
  android:text="A"
  android:textSize="20sp" />
</LinearLayout>

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

public class ListAdapter extends BaseAdapter {
 ArrayList<StringBean>list;
 Context context;
 LayoutInflater inflater;
 ListAdapter(ArrayList<StringBean>list,Context context){
  this.list=list;
  this.context=context;
  inflater= (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 }
 @Override
 public int getCount() {
  return list.size();
 }
 @Override
 public Object getItem(int i) {
  return list.get(i);
 }
 @Override
 public long getItemId(int i) {
  return i;
 }
 @Override
 public View getView(int position, View converView, ViewGroup viewGroup) {
  View view=converView;
  StringBean bean=list.get(position);
  int type=bean.getType();
  if(type==0){
   if(view==null){
    view=inflater.inflate(R.layout.type_layout,viewGroup,false);
   }
   TextView type_text= (TextView) view.findViewById(R.id.tvType);
   type_text.setText(bean.getLetter());
  }else if (type==1){
   if(converView==null){
    view=inflater.inflate(R.layout.city_layout,viewGroup,false);
   }
   TextView city_text= (TextView) view.findViewById(R.id.tvCity);
   city_text.setText(bean.getCity());
  }
  return view;
 }
 @Override
 public int getItemViewType(int i) {
  return list.get(i).getType();
 }
 @Override
 public int getViewTypeCount() {
  return 2;
 }
}

public class MainActivity extends AppCompatActivity {
 ArrayList<StringBean> list;
 ListView listView;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  initBean();
  initView();
 }
 public void initBean(){
  UserDao dao=new UserDao(this);
  list=dao.getList();
 }
 public void initView(){
  listView= (ListView) findViewById(R.id.listView);
  ListAdapter adapter=new ListAdapter(list,this);
  listView.setAdapter(adapter);
 }
}