Spinner sample program in Android

This sample android program shows you how to use Spinner  in Android. In this program a list is shown as a dropdown box. When you click on the list, the selected item is shown on the text view. You can use this ArrayAdapter widget and the Spinner object together with the  onListItemClick() method to determine the selected index and process accordingly.

The ArrayAdapterDemo2.java file is as follows:

package com.javasamples;

import android.app.Activity;
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 ArrayAdapterDemo2 extends Activity implements
  AdapterView.OnItemSelectedListener {
 TextView selection;
 String[] items = { "this", "is", "a", "really", 
   "really2", "really3",
   "really4", "really5", "silly", "list" };

 @Override
 public void onCreate(Bundle icicle) {
  super.onCreate(icicle);
  setContentView(R.layout.main);
  selection = (TextView) findViewById(R.id.selection);

  Spinner spin = (Spinner) findViewById(R.id.spinner);
  spin.setOnItemSelectedListener(this);

  ArrayAdapter aa = new ArrayAdapter(
    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]);
 }

 public void onNothingSelected(AdapterView<?> parent) {
  selection.setText("");
 }
}//class