选中条目android spinner的使用
最近应用开发的过程中出现了一个小问题，顺便记录一下原因和方法--选中条目
spinner控件由以下几部分构成：
1)String[]——也就是一个String数组，用于存储我们需要显示的条目。
2)Spinner——重要控件，未几说了。
3)ArrayAdapter<String>——适配器，用于将我们定义的条目数组绑定到Spinner上。
需要注意的是多个Spinnner绑定同一个Listener，onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3)方法的第一个参数才是我们需要区分的Spinner View，arg2是选中的条目序号。这也是选中后会触发的事件，因此可以在此取出选中的值。示例代码如下：
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","硕士","博士"};
private static final String[] string_department={"计算机学院","数学院","外语学院","机械学院","自动化学院","物理学院","化学院","艺术学院","文学院"};
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="计算机院";
@Override
protected 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);
}
@Override
public 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) {
}
}
}
布局文件如下：
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android: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>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="10dp"
android:text="分 组"
android:textSize="25px" />
<Spinner android:id="@+id/register_group"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android: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>
才疏学浅，难免有疏漏错误，请指正！想交流可以留言，独特学习先进。
文章结束给大家分享下程序员的一些笑话语录： 这个世界上只有10种人：懂得二进制的和不懂得二进制的。
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