package com.example.spinner;

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemSelectedListener;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

import android.widget.TextView;

public class MainActivity extends Activity implements OnItemSelectedListener{

private TextView textView;

private Spinner spinner;

private List<String> list;

private ArrayAdapter<String> adapter;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

textView = (TextView) findViewById(R.id.textView);

spinner = (Spinner) findViewById(R.id.spinner);

textView.setText("您选择的城市是北京");

//1、设置数据源

list = new ArrayList<String>();

list.add("北京");

list.add("上海");

list.add("广州");

list.add("深圳");

//2、新建数组适配器ArrayAdapter()

adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, list);

//3、adapter设置一个下拉列表样式

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

//4、spinner加载模拟器

spinner.setAdapter(adapter);

//5、spinner设置监听器

spinner.setOnItemSelectedListener(this);

}

@Override

public void onItemSelected(AdapterView<?> parent, View view, int position,

long id) {

// TODO Auto-generated method stub

String cityName = adapter.getItem(position);

//String city = list.get(position);

textView.setText("您选择的城市是"+cityName);

}

@Override

public void onNothingSelected(AdapterView<?> arg0) {

// TODO Auto-generated method stub

}

}