fragment 中利用spinner实现省市联动

（1）布局文件就不在说明了，主要说代码的实现，先把代码贴上！

package com.example.cl;import android.annotation.SuppressLint;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
@SuppressLint({ "NewApi", "ValidFragment" })public class Yezhuinformation extends Fragment{
private Spinner city;
private Spinner quorxian;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) { View v=inflater.inflate(R.layout.yezhuinformation, container, false);
city=(Spinner)v.findViewById(R.id.city);
quorxian = (Spinner)v.findViewById(R.id.quorxian); ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getActivity(),
R.array.city, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
city.setAdapter(adapter);
city.setOnItemSelectedListener(listener);
return v;
} OnItemSelectedListener listener = new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
Spinner spinner = (Spinner)parent;
String pro = spinner.getSelectedItem().toString();
ArrayAdapter<CharSequence> xianorquAdapter = ArrayAdapter.createFromResource
(getActivity(), R.array.zhengzhou, android.R.layout.simple_spinner_item);
if(pro.equals("武汉"))
{
xianorquAdapter = ArrayAdapter.createFromResource
(getActivity(), R.array.wuhan, android.R.layout.simple_spinner_item);
}
else if(pro.equals("南阳"))
{
xianorquAdapter = ArrayAdapter.createFromResource
(getActivity(), R.array.nanyang, android.R.layout.simple_spinner_item);
}
if(pro.equals("郑州"))
{
xianorquAdapter = ArrayAdapter.createFromResource
(getActivity(), R.array.zhengzhou, android.R.layout.simple_spinner_item);
}
else if(pro.equals("杭州"))
{
xianorquAdapter = ArrayAdapter.createFromResource
(getActivity(), R.array.hangzhou, android.R.layout.simple_spinner_item);
}
quorxian.setAdapter(xianorquAdapter);
}
public void onNothingSelected(AdapterView<?> parent) {
}
};
}

(2)接下来喷一下在activity中实现省市联动的代码

 ArrayAdapter<CharSequence> adapter =  ArrayAdapter.createFromResource(this, R.array.city, android.R.layout.simple_spinner_item); 

       adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);

再喷一下在fragment中实现省市联动的主要代码

ArrayAdapter<CharSequence> xianorquAdapter = ArrayAdapter.createFromRes (getActivity(), R.array.zhengzhou, android.R.layout.simple_spinner_item);

区别在createFromRes的第一个參数上，主要是由于子类不同，切记。

联动时仅仅要用setOnItemSelectedListener(listener);进行监听，能够通过两种方法实现联动，第一个是获取条目的位置，第二个是获取条目的内容，我採用的是第二个。

这样就能够实现省市联动了！