Make the "up" button behave like the "back" button on Android
from all three of your activities add the following
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
}
return(super.onOptionsItemSelected(item));
}
when you press the up button on your app it will invoke onOptionsItemSelected
with the id of android.R.id.home
just catch that case and manually call onBackPressed()