最近在做一个关于招聘的APP，里面有选择城市一项，是用listview分类，有的人说两个listview嵌套，但是感觉太麻烦了，比较listview底层太复杂，有的人用expandablelistview,但是感觉效果一样不好，所以写了一个比较简单的，希望对大家有帮助！
1.首先看MainActivity类！
其实跟普通的代码一样，只是多了一个MyBean类!
package com.zhaoqingyuan.zhaoqingyuan;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
public class MainActivity extends Activity {
private ListView listView;
private MyAdapter myAdapter;
private Listlist=new ArrayList();//装数据的
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView=(ListView) findViewById(R.id.listView1);
//装数据了
//当前位置
MyBean myBean=new MyBean("当前位置", "北京");
list.add(myBean);
//热门城市
String[] hotCity={"全国","北京","上海","武汉","广州","天津","太原","南京","深圳","重庆","昆明","拉萨","石家庄","哈尔滨","贵阳"};
for (int i = 0; i 2.这个是Bean类，里面有get和set方法！
package com.zhaoqingyuan.zhaoqingyuan;
public class MyBean {
private String series;
private String city;//可以替代省份名称
public MyBean(String series,String city) {
setSeries(series);
setCity(city);
}
public String getSeries() {
return series;
}
public void setSeries(String series) {
this.series = series;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
}
3.接下来就是我们在熟悉不过的适配器了！就是多了两行代码而已！
package com.zhaoqingyuan.zhaoqingyuan;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
public class MyAdapter extends BaseAdapter {
private Context context;
private Listlist=new ArrayList();
public MyAdapter(Context context,Listlist) {
this.context=context;
this.list=list;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
Holder holder;
@Override
public View getView(int position, View convertView, ViewGroup parent) {
holder=new Holder();
if (convertView==null) {
convertView=LayoutInflater.from(context).inflate(R.layout.item, null);
holder.tv_series=(TextView) convertView.findViewById(R.id.tv_series);
holder.tv_city=(TextView) convertView.findViewById(R.id.tv_city);
convertView.setTag(holder);
}else {
holder=(Holder) convertView.getTag();
}
String series1=list.get(position).getSeries();
String series2=position-1>=0?list.get(position-1).getSeries():"";
if (!series1.equals(series2)) {
holder.tv_series.setVisibility(View.VISIBLE);
System.out.println(position);
holder.tv_series.setText(series1);
holder.tv_city.setText(list.get(position).getCity());
}else {
holder.tv_series.setVisibility(View.GONE);
holder.tv_city.setText(list.get(position).getCity());
}
return convertView;
}
private class Holder{
TextView tv_series,tv_city;
}
}
4.来看下简单的XML代码
OK了，大功告成，让我们看一下效果吧！
