public class Calc extends Activity {

public static final String PREFS_NAME = "MyPrefsFile";

@Override

protected void onCreate(Bundle state){

super.onCreate(state);

. . .

// Restore preferences

SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);

String ipAddress = settings.getString("IPAddress", "");

int port = settings.getInt("port", 0);

int title = settings.getString("Title", "");

}

@Override

protected void onStop(){

super.onStop();

// We need an Editor object to make preference changes.

// All objects are from android.context.Context

SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);

SharedPreferences.Editor editor = settings.edit();

editor.putString("IPAddress", "127.0.0.1");

editor.putInt("port", 1234);

editor.putString("Title", "MyNewApplication");

// Commit the edits!

editor.commit();

}}