Android編程開(kāi)發(fā)之Spinner控件用法實(shí)例分析

更新時(shí)間：2015年12月23日 09:47:52 作者：sgx425021234

這篇文章主要介紹了Android編程開(kāi)發(fā)之Spinner控件用法,結(jié)合實(shí)例形式較為詳細(xì)的分析了下拉列表Spinner的具體使用技巧,需要的朋友可以參考下

本文實(shí)例講述了Android編程開(kāi)發(fā)之Spinner控件用法。分享給大家供大家參考，具體如下：

下拉列表 Spinner，Spinner是一個(gè)每次只能選擇所有項(xiàng)的一個(gè)項(xiàng)的控件。它的項(xiàng)來(lái)自于與之相關(guān)聯(lián)的適配器中。

Spinner的使用，可以極大提高用戶(hù)的體驗(yàn)性。當(dāng)需要用戶(hù)選擇的時(shí)候，可以提供一個(gè)下拉列表將所有可選的項(xiàng)列出來(lái)。供用戶(hù)選擇。

一、使用數(shù)組作為數(shù)據(jù)源

布局文件：

<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" 
 android:paddingBottom="@dimen/activity_vertical_margin" 
 android:paddingLeft="@dimen/activity_horizontal_margin" 
 android:paddingRight="@dimen/activity_horizontal_margin" 
 android:paddingTop="@dimen/activity_vertical_margin" 
 tools:context=".MainActivity" > 
 <Spinner 
  android:id="@+id/spinner1" 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" 
  android:layout_alignParentLeft="true" 
  android:layout_alignParentTop="true" /> 
</RelativeLayout>

MainActivity.java

package com.example.lesson16_spinner; 
import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.List; 
import java.util.Map; 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.SimpleAdapter; 
import android.widget.Spinner; 
import android.widget.Toast; 
public class MainActivity extends Activity { 
 // 聲明spinner對(duì)象 
 private Spinner spinner; 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
  spinner = (Spinner) findViewById(R.id.spinner1); 
  //使用數(shù)組作為數(shù)據(jù)源 
  final String arr[] = new String[] { "周一", "周二", "周三", "周四", "周五", "周六", "周七" }; 
  // adpater對(duì)象 
  ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, arr); 
  List<Map<String, Object>> data = new ArrayList<Map<String, Object>>();
  Map<String, Object> map = new HashMap<String, Object>(); 
  map.put("logo", R.drawable.ic_launcher); 
  map.put("text", "xxxx說(shuō)明操作"); 
  Map<String, Object> map2 = new HashMap<String, Object>(); 
  map2.put("logo", R.drawable.ic_launcher); 
  map2.put("text", "xxx說(shuō)明xxx"); 
  data.add(map); 
  data.add(map2); 
  SimpleAdapter simpleAdapter = new SimpleAdapter(this, data, R.layout.activity_item, new String[] { "logo", "text" }, new int[] { R.id.imageView1, R.id.textView1 }); 
  // 設(shè)置顯示的數(shù)據(jù) 
   spinner.setAdapter(arrayAdapter); 
  //spinner.setAdapter(simpleAdapter); 
  Toast.makeText(getApplicationContext(),"main Thread"+ spinner.getItemAtPosition(spinner.getSelectedItemPosition()), Toast.LENGTH_LONG).show(); 
  // 注冊(cè)事件 
  spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
   @Override 
   public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
    // String content = arr[position]; 
    Spinner spinner = (Spinner) parent; 
    Toast.makeText(getApplicationContext(), "xxxx" + spinner.getItemAtPosition(position), Toast.LENGTH_LONG).show(); 
   } 
   @Override 
   public void onNothingSelected(AdapterView<?> parent) { 
    Toast.makeText(getApplicationContext(), "沒(méi)有改變的處理", Toast.LENGTH_LONG).show(); 
   } 
  }); 
 } 
 @Override 
 public boolean onCreateOptionsMenu(Menu menu) { 
  // Inflate the menu; this adds items to the action bar if it is present. 
  getMenuInflater().inflate(R.menu.main, menu); 
  return true; 
 } 
}

效果如下：

二、使用XML作為數(shù)據(jù)源（非本人代碼）

布局文件：

<?xml version="1.0" encoding="utf-8"?> 
<resources> 
 <string-array name="plantes"> 
  <item>NOKIA</item> 
  <item>MOTO</item> 
  <item>HTC</item> 
  <item>LG</item> 
  <item>其他</item> 
 </string-array> 
</resources>

java代碼：

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 SpinnerActivity extends Activity { 
 private TextView view2; 
 private Spinner spinner2; 
 private ArrayAdapter adapter2; 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  // TODO Auto-generated method stub 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.spinner); 
  spinner2 = (Spinner) findViewById(R.id.spinner02); 
  view2 = (TextView) findViewById(R.id.spinnerText02); 
  //將可選內(nèi)容與ArrayAdapter連接起來(lái) 
  adapter2 = ArrayAdapter.createFromResource(this, R.array.plantes, android.R.layout.simple_spinner_item); 
  //設(shè)置下拉列表的風(fēng)格 
  adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
  //將adapter2 添加到spinner中 
  spinner2.setAdapter(adapter2); 
  //添加事件Spinner事件監(jiān)聽(tīng) 
  spinner2.setOnItemSelectedListener(new SpinnerXMLSelectedListener());
  //設(shè)置默認(rèn)值 
  spinner2.setVisibility(View.VISIBLE); 
 } 
 //使用XML形式操作 
 class SpinnerXMLSelectedListener implements OnItemSelectedListener{ 
  public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { 
   view2.setText("你使用什么樣的手機(jī)："+adapter2.getItem(arg2)); 
  } 
  public void onNothingSelected(AdapterView<?> arg0) { 
  } 
 } 
}

希望本文所述對(duì)大家Android程序設(shè)計(jì)有所幫助。

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