Android Spinner控件的使用

1、UI文件：spinner.xml

<?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" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="TextView" />

    <Spinner
        android:id="@+id/spinner1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:drawSelectorOnTop="true"
        android:prompt="@string/city_message"
        />

</LinearLayout>

2、SpinnerAcitivity.java文件

public class SpinnerActivity  extends Activity{
	private Spinner spinner;
	  private static final String[] CITY = {
	    	"Spinner Item1", "Spinner Item2", "Spinner Item3", "Spinner Item4" };
	 @Override
	    protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.spinner);
		spinner = (Spinner) findViewById(R.id.spinner1);
	ArrayAdapter<String> adapter = new ArrayAdapter<String>(
			this,android.R.layout.simple_spinner_item,CITY);
	spinner.setAdapter(adapter);
	spinner.setOnItemSelectedListener(
			new AdapterView.OnItemSelectedListener(){
				public void onItemSelected(AdapterView<?> arg0, View arg1,
						int arg2, long arg3) {
				Toast.makeText(SpinnerActivity.this, CITY[arg2], Toast.LENGTH_SHORT).show();
			}
			public void onNothingSelected(AdapterView<?> arg0){}
			});
	
	    }
}

 3. 效果图。 使用模拟器。