number of fragments

fragments.java

ANDROID
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xml
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<FrameLayout
        android:id="@+id/flPlaceHolder"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="7"/>
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fragment.java
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public class GeneralFragment extends Fragment {

    @BindView(R.id.edtTelf1)
    EditText edtTelf1;
    @BindView(R.id.edtTelf2)
    EditText edtTelf2;
    @BindView(R.id.edtTelf3)
    EditText edtTelf3;
    @BindView(R.id.edtChildrenNumber)
    EditText edtChildrenNumber;
    @BindView(R.id.spEducationLevel)
    Spinner spEducationLevel;
    @BindView(R.id.edtCareer)
    EditText edtCareer;
    @BindView(R.id.edtCashFlow)
    EditText edtCashFlow;
    @BindView(R.id.edtInvestmentPlan)
    EditText edtInvestmentPlan;
    @BindView(R.id.spHouseType)
    Spinner spHouseType;
    @BindView(R.id.spDocumentType)
    Spinner spDocumentType;
    Unbinder unbinder;

    public static GeneralFragment newInstance(){
        GeneralFragment generalFragment = new GeneralFragment();
        return generalFragment;
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup parent, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_general, parent, false);
        unbinder = ButterKnife.bind(this, view);
        return view;
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        unbinder.unbind();
    }
}
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activity.java
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 private GeneralFragment generalFragment;
    private List<Fragment> activeFragments;

    @Override
    protected int getView() {
        return R.layout.activity_begin_registry;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ButterKnife.bind(this);
        preLoad();
        events();
        if (Utils.isNull(savedInstanceState)){
            generalFragment = GeneralFragment.newInstance();
        }
    }

private void inflateFragment(Fragment fragment) {
  FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
          if (fragment instanceof AddressFragment) {
              if (generalFragment.isAdded()) {
                  fragmentTransaction.show(addressFragment);
              }else{
                  fragmentTransaction.add(R.id.flPlaceHolder, addressFragment, "address");
                  activeFragments.add(addressFragment);
              }
              if (generalFragment.isAdded())fragmentTransaction.hide(generalFragment);
              if (photosFragment.isAdded())fragmentTransaction.hide(photosFragment);
          }
              fragmentTransaction.commit();
}