/**
* 在listview中加载多个布局
* 以城市列表为例,保证cityLetter和cityName中没有相同的元素，且letter中没有相同的元素
*/
public class MainActivity extends Activity implements OnItemClickListener{
String[] letter={"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"};
String[] cityLetter={"C","B","H","G","W","C","S","S","C","W","H","Z","C","D","N","L","Q","S","S"
,"L","N","H","X","H","S","Z","G","N","J","T","S","X","A","L","T"};
String[] cityName={"长沙","北京","杭州","广州","武汉","重庆","上海","深圳","长春","乌鲁木齐","哈尔滨","郑州","成都","大连","南昌","兰州","齐齐哈尔","汕头","苏州"
,"拉萨","南京","呼和浩特","厦门","合肥","沈阳","张家界","贵州","宁夏","济南","天津","石家庄","西安","澳门","临汾","太原"};
List<String> letterToCity=new ArrayList<String>();
int count;
ListView lv;
ListView lv1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String str="";
for(int i=0;i<letter.length;i++){
str=letter[i];
boolean isAddLetter=false;
for(int j=0;j<cityLetter.length;j++){
if(str.equals(cityLetter[j])){
if(!isAddLetter){
letterToCity.add(str);
isAddLetter=true;
}
letterToCity.add(cityName[j]);
}
}
}
lv=(ListView)findViewById(R.id.listView1);
lv.setAdapter(new MyAdapter());
lv.setOnItemClickListener(this);
lv1=(ListView)findViewById(R.id.listView2);
lv1.setAdapter(new MyAdapter1());
lv1.setOnItemClickListener(this);
}
class MyAdapter1 extends BaseAdapter{
@Override
public int getCount() {
// TODO Auto-generated method stub
return letter.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return letter[position];
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view=LayoutInflater.from(MainActivity.this).inflate(R.layout.letter_list, null);
TextView tv=(TextView)view.findViewById(R.id.letterListTextView);
tv.setText(letter[position]);
return view;
}
}
class MyAdapter extends BaseAdapter{
final static int TYPE_1=1;
final static int TYPE_2=2;
@Override
public int getCount() {
// TODO Auto-generated method stub
return letterToCity.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return letterToCity.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public int getItemViewType(int position) {
for(int i=0;i<letter.length;i++){
if(letterToCity.get(position).equals(letter[i])){
return TYPE_1;
}
}
return TYPE_2;
}
@Override
public int getViewTypeCount() {
return 3;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
/**
* 即使convertView缓存了一些布局，但是在重构时，根本不知道怎么样去让convertView返回你所需要的布局，这时你需
* 要让adapter知道我当前有哪些布局，我重构Item时的布局选取规则，好让convertView能返回你需要的布局。
* 需要重写以下两个函数
* @Override
* public int getItemViewType(int position) {}这个函数获取在getView中创建的视图的类型
* @Override
* public int getViewTypeCount() {}返回在getView中创建视图类型的数量
* 至于这两个方法的详细用处，自己看api即可
*/
ViewHolder1 vh1=null;
ViewHolder2 vh2=null;
int type=getItemViewType(position);
if(convertView==null){
switch (type) {
case TYPE_1:
convertView=LayoutInflater.from(MainActivity.this).inflate(R.layout.letter, null);
vh1=new ViewHolder1();
vh1.tv=(TextView)convertView.findViewById(R.id.letterTextView);
convertView.setTag(vh1);
break;
case TYPE_2:
convertView=LayoutInflater.from(MainActivity.this).inflate(R.layout.city, null);
vh2=new ViewHolder2();
vh2.tv=(TextView)convertView.findViewById(R.id.cityTextView);
convertView.setTag(vh2);
break;
default:
break;
}
}else{
switch (type) {
case TYPE_1:
vh1=(ViewHolder1)convertView.getTag();
break;
case TYPE_2:
vh2=(ViewHolder2)convertView.getTag();
break;
default:
break;
}
}
switch (type) {
case TYPE_1:
vh1.tv.setText(letterToCity.get(position));
break;
case TYPE_2:
vh2.tv.setText(letterToCity.get(position));
break;
default:
break;
}
return convertView;
}
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
switch (parent.getId()) {
case R.id.listView1:
boolean isLetter=false;
for(int i=0;i<letter.length;i++){
if(letter[i].equals(letterToCity.get(position))){
isLetter=true;
break;
}
}
if(!isLetter){
Toast.makeText(this, letterToCity.get(position), Toast.LENGTH_SHORT).show();
}
break;
case R.id.listView2:
for(int i=0;i<letterToCity.size();i++){
if(letter[position].equals(letterToCity.get(i))){
lv.setSelection(i);
break;
}
}
break;
default:
break;
}
}
}
class ViewHolder{
TextView tv;
LinearLayout ll;
}
class ViewHolder1{
TextView tv;
}
class ViewHolder2{
TextView tv;
}