A simple Fragment container meant to be used inside a ViewPager where it can then navigate to other Fragments

CaptainFragment.java

package com.gfpacheco.views.widget;

import android.annotation.SuppressLint;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;

import java.util.concurrent.atomic.AtomicInteger;

@SuppressLint("ValidFragment")
public class CaptainFragment extends Fragment {

    private Fragment mCurrentDestination;
    private int mFrameLayoutId;

    @SuppressLint("ValidFragment")
    public CaptainFragment(Fragment firstDestination) {
        super();
        mCurrentDestination = firstDestination;
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        FrameLayout frameLayout = new FrameLayout(getActivity());
        mFrameLayoutId = ViewUtils.generateViewId();
        frameLayout.setId(mFrameLayoutId);
        navigate(mCurrentDestination, false);
        return frameLayout;
    }

    @Override
    public void setUserVisibleHint(boolean isVisibleToUser) {
        super.setUserVisibleHint(isVisibleToUser);

        if (mCurrentDestination != null && mCurrentDestination.isAdded()) {
            mCurrentDestination.setUserVisibleHint(isVisibleToUser);
        }
    }

    // Any child fragment willing to start an activity and wait it's result should
    // start it through captains methods `getParentFragment().startActivityForResult()`
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        mCurrentDestination.onActivityResult(requestCode, resultCode, data);
    }

    public void navigate(Fragment fragment) {
        navigate(fragment, true);
    }

    public void navigate(Fragment fragment, boolean addToStack) {
        FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
        transaction.replace(mFrameLayoutId, fragment);

        if (addToStack) {
            transaction.addToBackStack(null);
        }

        transaction.commit();
        mCurrentDestination = fragment;
    }

    public boolean navigateBack() {
        if (getChildFragmentManager().getBackStackEntryCount() > 0) {
            getChildFragmentManager().popBackStack();
            return true;
        } else {
            return false;
        }
    }
    
    public class ViewUtils {
        
        private static final AtomicInteger sNextGeneratedId = new AtomicInteger(1);
    
        public static int generateViewId() {
            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
                for (; ; ) {
                    final int result = sNextGeneratedId.get();
                    int newValue = result + 1;
                    if (newValue > 0x00FFFFFF) newValue = 1;
                    if (sNextGeneratedId.compareAndSet(result, newValue)) {
                        return result;
                    }
                }
            } else {
                return View.generateViewId();
            }
        }
    
    }
    
}