Example of using the spinner Drop-down list for the anroid development tutorial _android

First add the spinner control to the XML file:

Copy Code code as follows:

<spinner
Android:id= "@+id/myspinner"
android:layout_height= "Wrap_content"
Android:layout_width= "Fill_parent"
/>

To write in an activity:

Copy Code code as follows:

Package Com.example.spinner;

Import android.app.Activity;
Import Android.os.Bundle;
Import Android.view.View;
Import Android.widget.AdapterView;
Import Android.widget.AdapterView.OnItemSelectedListener;
Import Android.widget.ArrayAdapter;
Import Android.widget.Spinner;
Import Android.widget.Toast;

public class Mainactivity extends activity {

Private Spinner Spinner;

  @Override
 protected void OnCreate (Bundle savedinstancestate) {
  super.oncreate ( Savedinstancestate);
  setcontentview (R.layout.activity_main);

  spinner = (spinner) This.findviewbyid (R.id.myspinner);
  //set the data source
  string[] MyData = {"Beijing", "Shanghai", "Guangdong", "Guangxi"};

  //declares a arrayadapter and associates the data source with it
  ArrayAdapter<String> adapter = new Arrayadapter<string> (this,android. R.layout.simple_spinner_item,mydata);
  //Sets the style of pop-up Drop-down list
  adapter.setdropdownviewresource (Android. R.layout.simple_spinner_dropdown_item);
  //adds Arrayadapter objects to the spinner
  spinner.setadapter (adapter);
  //Add Listener
  spinner.setonitemselectedlistener (new Onitemselectedlistener () {

@Override
public void onitemselected (adapterview<?> arg0, View arg1,
int arg2, long arg3) {
Toast.maketext (Mainactivity.this, "selected:" + arg2, Toast.length_short). Show ();
}

@Override
public void onnothingselected (adapterview<?> arg0) {
TODO auto-generated Method Stub

}
});
}
}