android : How to set value in Spinner

Follow this code to set value in Spinner

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

public class MainActivity extends Activity implements OnItemSelectedListener {
 Spinner spinnerOsversions;
 TextView selVersion;
 private String[] state = { "Cupcake", "Donut", "Eclair", "Froyo",
   "Gingerbread", "HoneyComb", "IceCream Sandwich", "Jellybean",
   "kitkat" };

  @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  System.out.println(state.length);
  selVersion = (TextView) findViewById(R.id.selVersion);
  spinnerOsversions = (Spinner) findViewById(R.id.osversions);
  ArrayAdapter<String> adapter_state = new ArrayAdapter<String>(this,
    android.R.layout.simple_spinner_item, state);
  adapter_state
    .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
  spinnerOsversions.setAdapter(adapter_state);
  spinnerOsversions.setOnItemSelectedListener(this);

  }

  public void onItemSelected(AdapterView<?> parent, View view, int position,
   long id) {
  spinnerOsversions.setSelection(position);
  String selState = (String) spinnerOsversions.getSelectedItem();
  selVersion.setText("Selected Android OS:" + selState);
 }

  @Override
 public void onNothingSelected(AdapterView<?> arg0) {
  // TODO Auto-generated method stub

  }

}