Spinner_demo.xml這個布局文件的寫法如下：

<?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:orientation="vertical" >

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??? <Spinner

??????? android:id="@+id/spinner1"

??????? android:layout_width="match_parent"

??????? android:layout_height="wrap_content" />

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??? <TextView

??????? android:id="@+id/textView1"

??????? android:layout_width="wrap_content"

??????? android:layout_height="wrap_content"

??????? android:text="被選中的人名顯示在下面"

??????? android:textSize="25sp"

??????? />

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</LinearLayout>

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ASpinner

package com.example.uidemo3;

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import java.util.ArrayList;

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import android.R.anim;

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;

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public class ASpinner extends Activity {

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?????? Spinner spinner1;

?????? ArrayList<String> arrayList = new ArrayList<String>();

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?????? TextView textView1;

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?????? OnItemSelectedListener onItemSelectedListener = new OnItemSelectedListener() {

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????????????? /*

????????????? ?* parent The AdapterView where the selection happened

????????????? ?*view The view within the AdapterView that was clicked

???????? *position The position of the view in the adapter

???????? *id The row id of the item that is selected

???????? *

???????? *AdapterView<?>代表Spinner

???????? *View代表Spinner里面的item

????????????? ?*/

????????????? @Override

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

??????????????????????????? int position, long id) {

????????????????????

???????????????????? textView1.setText( ((TextView)view).getText());

????????????? }

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????????????? @Override

????????????? public void onNothingSelected(AdapterView<?> parent) {

????????????? }

?????? };

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?????? @Override

?????? protected void onCreate(Bundle savedInstanceState) {

????????????? super.onCreate(savedInstanceState);

????????????? this.setContentView(R.layout.spinner_demo);

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????????????? spinner1 = (Spinner) this.findViewById(R.id.spinner1);

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????????????? textView1 = (TextView) this.findViewById(R.id.textView1);

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????????????? arrayList.add("小倉優子");

????????????? arrayList.add("蒼井空");

????????????? arrayList.add("松島楓");

????????????? arrayList.add("波多野結衣");

????????????? arrayList.add("櫻田櫻");

????????????? arrayList.add("小峰由衣");

????????????? arrayList.add("早乙女");

????????????? arrayList.add("小泉彩");

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????????????? // 適配的概念Adapter,主要負責適配數據和各種樣式

????????????? // 下拉菜單的樣式

????????????? @SuppressWarnings({ "unchecked", "rawtypes" })

????????????? ArrayAdapter arrayAdapter = new ArrayAdapter(this,

??????????????????????????? android.R.layout.simple_spinner_item, arrayList);

????????????? // 以下顯示的是一行，只有一行能看的見

????????????? // arrayAdapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);

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????????????? // 這種是帶有文本和radio的下拉效果。

????????????? arrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

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????????????? // arrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_item);

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????????????? // 為下拉的spinner設置內容

????????????? spinner1.setAdapter(arrayAdapter);

????????????? //為spinner1設置監聽事件

????????????? spinner1.setOnItemSelectedListener(onItemSelectedListener);

?????? }

}

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總結

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