1) main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 >
 <TextView
  android:id="@+id/selector"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  
  />
 <Spinner android:id="@+id/spinner"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:drawSelectorOnTop="true"/>
</LinearLayout>

2) SpinnerDemo.java

package com.commonsware.android.selection;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;

public class SpinnerDemo extends Activity
 implements AdapterView.OnItemSelectedListener {
 TextView selection;
 String[] items={"a", "b", "c", "d", "e",
     "e", "f", "g", "h", "i",
     "j", "k", "l", "james", "m"};
 
 @Override
 public void onCreate(Bundle icicle) {
  super.onCreate(icicle);
  setContentView(R.layout.main);
  selection=(TextView)findViewById(R.id.selector);
  
  Spinner spin=(Spinner)findViewById(R.id.spinner);
 
  spin.setOnItemSelectedListener(this);
  
  ArrayAdapter<String> aa=new ArrayAdapter<String>(this,
               android.R.layout.simple_spinner_item,
               items);
  
  aa.setDropDownViewResource(
   android.R.layout.simple_spinner_dropdown_item);

  spin.setAdapter(aa);
 }
 
 public void onItemSelected(AdapterView<?> parent,
                View v, int position, long id) {
  selection.setText(items[position]);
  ((TextView)parent.getChildAt(0)).setTextColor(Color.RED);

// Of cause, This source is abailable for index number more than 0.
 }
 
 public void onNothingSelected(AdapterView<?> parent) {
  selection.setText("");
 }
}