Android 中 Spinner 的使用

一、UI 设计

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical" >
  <TextView android:id="@+id/spinnerText"
              android:layout_width="fill_parent"
              android:layout_height="wrap_content"></TextView>
  <Spinner android:id="@+id/Spinner01"
           android:layout_width="fill_parent"
           android:layout_height="wrap_content"></Spinner>
</LinearLayout>

二、代码实现

1、使用 Java 数组为数据源

public class SpinnerActivity extends Activity {
     
    private static final String[] m={"A型","B型","O型","AB型","其他"};
    private TextView view ;
    private Spinner spinner;
    private ArrayAdapter<String> adapter;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.spinner);
         
        view = (TextView) findViewById(R.id.spinnerText);
        spinner = (Spinner) findViewById(R.id.Spinner01);
        //将可选内容与ArrayAdapter连接起来
        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,m);
         
        //设置下拉列表的风格
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
         
        //将adapter 添加到spinner中
        spinner.setAdapter(adapter);
         
        //添加事件Spinner事件监听
        spinner.setOnItemSelectedListener(new SpinnerSelectedListener());
         
        //设置默认值
        spinner.setVisibility(View.VISIBLE);
         
    }
     
    //使用数组形式操作
    class SpinnerSelectedListener implements OnItemSelectedListener{
 
        public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            view.setText("你的血型是："+m[arg2]);
        }
 
        public void onNothingSelected(AdapterView<?> arg0) {
        }
    }
}

2、使用 arryas.xml 为数据源

arryas.xml

<?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>

代码实现：
 

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);
 
        //将可选内容与ArrayAdapter连接起来
        adapter2 = ArrayAdapter.createFromResource(this, R.array.plantes, android.R.layout.simple_spinner_item);
 
        //设置下拉列表的风格   
        adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
 
        //将adapter2 添加到spinner中
        spinner2.setAdapter(adapter2);
 
        //添加事件Spinner事件监听
        spinner2.setOnItemSelectedListener(new SpinnerXMLSelectedListener());
 
        //设置默认值
        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("你使用什么样的手机："+adapter2.getItem(arg2));
        }

        public void onNothingSelected(AdapterView<?> arg0) {
        }
    }
}