最近應用開發的過程中出現了一個小問題，順便記錄一下原因和方法--選中條目

????spinner控件由以下幾部分構成：

????1)String[]——也就是一個String數組，用于存儲我們需要顯示的條目。

????2)Spinner——重要控件，未幾說了。

????3)ArrayAdapter<String>——適配器，用于將我們定義的條目數組綁定到Spinner上。

????需要注意的是多個Spinnner綁定同一個Listener，onItemSelected(AdapterView<?> arg0, View arg1, int arg2, ?long arg3)方法的第一個參數才是我們需要區分的Spinner View，arg2是選中的條目序號。這也是選中后會觸發的事件，因此可以在此取出選中的值。示例代碼如下：

public class RegisterActivity extends Activity { private EditText register_password; private EditText register_username; private EditText register_email; private EditText register_realname; private EditText register_stunumber; private static final String[] string_year={"1980","1981","1982","1983","1984","1985","1986","1987","1988","1989","1990","1991","1992","1993","1994","1995","1996","1997","1998","1999","2000","2001","2002","2003","2004","20050","2006","2007","2008","2009","2010","2011","2012","2013"}; private static final String[] string_month={"1","2","3","4","5","6","7","8","9","10","11","12"}; private static final String[] string_day={"1","2","3","4","5","6","7","8","9","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30","31"}; private static final String[] string_group={"先生","本科生","碩士","博士"}; private static final String[] string_department={"計算機學院","數學院","外語學院","機械學院","自動化學院","物理學院","化學院","藝術學院","文學院"}; private Spinner register_year; private Spinner register_month; private Spinner register_day; private Spinner register_group; private Spinner register_department; private ArrayAdapter<String> register_year_adapter; private ArrayAdapter<String> register_month_adapter; private ArrayAdapter<String> register_day_adapter; private ArrayAdapter<String> register_group_adapter; private ArrayAdapter<String> register_department_adapter; private String selected_year="1980"; private String selected_month="1"; private String selected_day="1"; private String selected_group="先生"; private String selected_department="計算機院";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_register);register_password=(EditText)findViewById(R.id.register_password);register_password.setInputType(InputType.TYPE_CLASS_TEXT| InputType.TYPE_TEXT_VARIATION_PASSWORD);register_month = (Spinner) findViewById(R.id.register_month); register_month_adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,string_month); register_month_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); register_month.setAdapter(register_month_adapter); register_month.setOnItemSelectedListener(new SpinnerSelectedListener()); register_month.setVisibility(View.VISIBLE); register_year = (Spinner) findViewById(R.id.register_year); register_year_adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,string_year); register_year_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); register_year.setAdapter(register_year_adapter); register_year.setOnItemSelectedListener(new SpinnerSelectedListener()); register_year.setVisibility(View.VISIBLE); register_day = (Spinner) findViewById(R.id.register_day); register_day_adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,string_day); register_day_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); register_day.setAdapter(register_day_adapter); register_day.setOnItemSelectedListener(new SpinnerSelectedListener()); register_day.setVisibility(View.VISIBLE); register_group = (Spinner) findViewById(R.id.register_group); register_group_adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,string_group); register_group_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); register_group.setAdapter(register_group_adapter); register_group.setOnItemSelectedListener(new SpinnerSelectedListener()); register_group.setVisibility(View.VISIBLE); register_department = (Spinner) findViewById(R.id.register_department); register_department_adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,string_department); register_department_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); register_department.setAdapter(register_department_adapter); register_department.setOnItemSelectedListener(new SpinnerSelectedListener()); register_department.setVisibility(View.VISIBLE); }@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.register, menu);return true;}class SpinnerSelectedListener implements OnItemSelectedListener{ public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { if(arg0==register_year)selected_year=string_year[arg2];else if(arg0==register_month)selected_month=string_month[arg2];else if(arg0==register_day)selected_day=string_day[arg2];else if(arg0==register_group)selected_group=string_group[arg2];else if(arg0==register_department)selected_department=string_department[arg2];} public void onNothingSelected(AdapterView<?> arg0) { } } } 每日一道理
盈盈月光，我掬一杯最清的；落落余輝，我擁一縷最暖的；灼灼紅葉，我拾一片最熱的；萋萋芳草，我摘一束最燦的；漫漫人生，我要采擷世間最重的———毅力。

????布局文件如下：

<LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:orientation="horizontal" ><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginRight="1dp"android:text="生 日"android:textSize="25px" /><Spinner android:id="@+id/register_year" android:layout_width="wrap_content" android:layout_height="wrap_content"android:layout_marginLeft="0dp"android:layout_marginRight="0dp"/><Spinner android:id="@+id/register_month" android:layout_width="wrap_content" android:layout_height="wrap_content"android:layout_marginLeft="0dp"android:layout_marginRight="0dp"/><Spinner android:id="@+id/register_day" android:layout_width="wrap_content" android:layout_height="wrap_content"android:layout_marginLeft="0dp"android:layout_marginRight="0dp"/></LinearLayout><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:orientation="horizontal" ><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginRight="10dp"android:text="分 組"android:textSize="25px" /><Spinner android:id="@+id/register_group" android:layout_width="match_parent" android:layout_height="wrap_content"/></LinearLayout> <LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:orientation="horizontal" ><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginRight="10dp"android:text="院 系"android:textSize="25px" /><Spinner android:id="@+id/register_department" android:layout_width="match_parent" android:layout_height="wrap_content"/></LinearLayout>

????才疏學淺，難免有疏漏錯誤，請指正！想交流可以留言，獨特學習先進。

文章結束給大家分享下程序員的一些笑話語錄： 這個世界上只有10種人：懂得二進制的和不懂得二進制的。

--------------------------------- 原創文章 By
選中和條目
---------------------------------

轉載于:https://www.cnblogs.com/xinyuyuanm/archive/2013/05/30/3109044.html

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