Saving data:

@Override
public void onSaveInstanceState(Bundle outState)
{
//---save whatever you need to persist—
outState.putString("ID", "1234567890");
super.onSaveInstanceState(outState);
}

Loading data:

@Override
public void onRestoreInstanceState(Bundle savedInstanceState)
{
super.onRestoreInstanceState(savedInstanceState);
//---retrieve the information persisted earlier---
String ID = savedInstanceState.getString("ID");
}