public class MainActivity extends Activity {

private Spinner spinner=null;
protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);
spinner=(Spinner)findViewById(R.id.city);
//参数一、指上下文对象 参数二、引用string中定义的数组
//参数三、指定spinner的样式      系统自带的
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.city,android.R.layout.simple_spinner_item);
//spinner当中每个条目的样式 同样是系统自带的
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setPrompt("市");
//为spinner绑定监听器
spinner.setOnItemSelectedListener(new SpinnerOnSelectedListener());

}
//监听器
class SpinnerOnSelectedListener implements OnItemSelectedListener{
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int Position,
long id) {
String selected=adapterView.getItemAtPosition(Position).toString();
System.out.println(selected);
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
System.out.println("nothing selected");
}
}

}