setContentView(R.layout.login_activity);

<activity
        android:name=".activities.Login"
        android:configChanges="keyboardHidden|screenSize"   />

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    Log.d(TAG, "onConfigurationChanged()             " + newConfig.orientation);
    if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE)
        {
//myCode
    } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
//myCode
    }
}