android spinner下拉列表

MainActivity.java

package com.ct7_Sprinner;

import java.util.ArrayList;

import java.util.List;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;

public class MainActivity extends Activity {
	
	private TextView textView;
	private Spinner spinner;
	private List<String> list=null;
	private ArrayAdapter<String> adapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        mySet();
        list=MyData.getData();
        setArrayAdapter();
        spinner.setAdapter(adapter);
    }

    private void mySet() {
		// TODO Auto-generated method stub
    	textView=(TextView) findViewById(R.id.textView_Show);
    	spinner=(Spinner) findViewById(R.id.spinner_City);
    	
    	spinner.setOnItemSelectedListener(itemSelecedtListener);
		
	}
    private OnItemSelectedListener itemSelecedtListener=new OnItemSelectedListener() {

		@Override
		public void onItemSelected(AdapterView<?> parent, View view,
				int position, long id) {
			// TODO Auto-generated method stub
			textView.setText("您选择的是："+adapter.getItem(position));
			parent.setVisibility(View.VISIBLE);
		}

		@Override
		public void onNothingSelected(AdapterView<?> parent) {
			// TODO Auto-generated method stub
			textView.setText("NONE");
			parent.setVisibility(View.VISIBLE);
		}
	};
	
	private void setArrayAdapter() {
		// TODO Auto-generated method stub
		adapter=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,list);
		adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
	}
}

MyData.java

package com.ct7_Sprinner;

import java.util.ArrayList;
import java.util.List;

public class MyData {
	public static List<String> getData() {
		List<String> list=new ArrayList<String>();
		list.add("北京");
		list.add("上海");
		list.add("深圳");
		list.add("南京");
		list.add("东莞");
		list.add("南山");
		list.add("广州");
		list.add("重庆");
		list.add("天津");		
		return list;
	}

}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/widge28"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/textView_Show"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="您的选择是"
            android:textSize="25sp" />

        <Spinner
            android:id="@+id/spinner_City"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />
    </LinearLayout>

</RelativeLayout>