<Spinner android:id="@+id/spinner1"android:layout_width="match_parent"android:layout_height="wrap_content"/>

String[] city=new String[]{"北京","上海","香港","澳門"};ArrayAdapter<String> adapter=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, city);

package fry;import com.example.SpinnerDemo.R;import android.app.Activity;import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.Spinner;public class Activity01 extends Activity{  private Spinner spinner1;  @Override  protected void onCreate(Bundle savedInstanceState) {    // TODO Auto-generated method stub    super.onCreate(savedInstanceState);    setContentView(R.layout.activity01);        spinner1=(Spinner) findViewById(R.id.spinner1);        initSpinner1();  }  public void initSpinner1(){    String[] city=new String[]{"北京","上海","香港","澳門"};    ArrayAdapter<String> adapter=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, city);    spinner1.setAdapter(adapter);  }}

<?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/spinner1"     android:layout_width="match_parent"     android:layout_height="wrap_content"     />  </LinearLayout>