Spinner 下拉列表 demo

<?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" >    <Spinner    android:id="@+id/planets_spinner"    android:layout_width="fill_parent"    android:layout_height="wrap_content" /></LinearLayout>

public class MenuActivity extends Activity {protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_menu);Spinner spinner = (Spinner) findViewById(R.id.planets_spinner);// Create an ArrayAdapter using the string array and a default spinner layoutArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,        R.array.planets_array, android.R.layout.simple_spinner_item);// Specify the layout to use when the list of choices appearsadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);// Apply the adapter to the spinnerspinner.setAdapter(adapter);spinner.setOnItemSelectedListener(new OnItemSelectedListener() {public void onItemSelected(AdapterView<?> arg0, View arg1,int arg2, long arg3) {Log.i("onItemSelected",arg0+","+arg1+","+arg2+","+arg3);}public void onNothingSelected(AdapterView<?> arg0) {Log.i("onNothingSelected",arg0.toString());}});}}

http://developer.android.com/guide/topics/ui/controls/spinner.html#SelectListener

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