Quelle est la bonne façon de mettre en œuvre des paires clé-valeur dans Spinner android

Est-ce la bonne façon de mettre en œuvre des paires clé-valeur pour un Spinner Android?

package com.mypackage
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Spinner;
import android.widget.ArrayAdapter;
import android.widget.AdapterView;
import android.widget.TextView;
public class SpinnerAndAdapter extends Activity
{
TextView    valueTextView;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
valueTextView = (TextView)findViewById( R.id.selected );
Spinner s = (Spinner)findViewById(R.id.spinner);
final MyData items[] = new MyData[3];
items[0] = new MyData( "key1","value1" );
items[1] = new MyData( "key2","value2" );
items[2] = new MyData( "key3","value3" );
ArrayAdapter<MyData> adapter = 
new ArrayAdapter<MyData>( 
this,
android.R.layout.simple_spinner_item,
items );
adapter.setDropDownViewResource(
android.R.layout.simple_spinner_dropdown_item);
s.setAdapter(adapter);
s.setOnItemSelectedListener(
new AdapterView.OnItemSelectedListener() {
public void onItemSelected(
AdapterView<?> parent, 
View view, 
int position, 
long id) {
MyData d = items[position];
valueTextView.setText( d.getValue() );
}
public void onNothingSelected(AdapterView<?> parent) {
}
}
);
}
class MyData {
public MyData( String spinnerText, String value ) {
this.spinnerText = spinnerText;
this.value = value;
}
public String getSpinnerText() {
return spinnerText;
}
public String getValue() {
return value;
}
public String toString() {
return spinnerText;
}
String spinnerText;
String value;
}
}