android应用开发之spinner控件的简单使用

package com.mecury.spinnertest;import java.util.ArrayList;import android.support.v7.app.ActionBarActivity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Spinner;public class MainActivity extends ActionBarActivity {  private Spinner spinnerButton;  private Spinner spinner;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    spinnerButton = (Spinner) findViewById(R.id.spinnerButton);    spinner = (Spinner) findViewById(R.id.spinner2);    /*静态的显示下来出来的菜单选项，显示的数组元素提前已经设置好了     * 第二个参数：已经编写好的数组     * 第三个数据：默认的样式     */    ArrayAdapter<CharSequence> adapter =     ArrayAdapter.createFromResource(this, R.array.number_array, android.R.layout.simple_spinner_item);    //设置spinner中每个条目的样式，同样是引用android提供的布局文件    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);    spinnerButton.setAdapter(adapter);    spinnerButton.setPrompt("测试");    spinnerButton.setOnItemSelectedListener(new spinnerListener());    /*     * 动态添显示下来菜单的选项，可以动态添加元素     */    ArrayList<String> list = new ArrayList<String>();    list.add("1.苹果");    list.add("2.橘子");    /*     * 第二个参数是显示的布局     * 第三个参数是在布局显示的位置id     * 第四个参数是将要显示的数据     */    ArrayAdapter adapter2 = new ArrayAdapter(this, R.layout.item, R.id.textview,list);    spinner.setAdapter(adapter2);    spinner.setOnItemSelectedListener(new spinner2Listener());  }  class spinnerListener implements android.widget.AdapterView.OnItemSelectedListener{    @Override    public void onItemSelected(AdapterView<?> parent, View view,        int position, long id) {      //将选择的元素显示出来      String selected = parent.getItemAtPosition(position).toString();    }    @Override    public void onNothingSelected(AdapterView<?> parent) {      System.out.println("nothingSelect");    }  }  class spinner2Listener implements android.widget.AdapterView.OnItemSelectedListener{    @Override    public void onItemSelected(AdapterView<?> parent, View view,        int position, long id) {      String selected = parent.getItemAtPosition(position).toString();    }    @Override    public void onNothingSelected(AdapterView<?> parent) {      System.out.println("nothingSelect");    }  }}

<LinearLayout 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"  android:orientation="vertical"  android:padding="10dp"  tools:context="com.mecury.spinnertest.MainActivity" >  <TextView     android:layout_width="match_parent"    android:layout_height="wrap_content"    android:text="这是静态的："/>  <Spinner     android:id="@+id/spinnerButton"    android:layout_width="match_parent"    android:layout_height="30dp"/>  <TextView     android:layout_width="match_parent"    android:layout_height="wrap_content"    android:text="这是动态的："/>  <Spinner     android:id="@+id/spinner2"    android:layout_width="match_parent"    android:layout_height="wrap_content"/></LinearLayout>

<string-array name="number_array">    <item>1000</item>    <item>2000</item>    <item>3000</item>    <item>4000</item>    <item>5000</item>    <item>6000</item>    <item>7000</item>    <item>8000</item>    <item>9000</item>  </string-array>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:background="#00ffff"  android:padding="10dp"  android:orientation="vertical" >  <TextView     android:id="@+id/textview"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:textSize="20dp"/></LinearLayout>