How to implement tabview in one of the fragment of bottombar?

Question

I want this type of design :: Here Is My design

My mainactivity.xml only contain a frameLayout which is Replaced by Selected Fragment from bottombar menu item.

It's code is here:

b = BottomBar.attach(this,savedInstanceState);
    b.setItemsFromMenu(R.xml.menu_main, new OnMenuTabClickListener() {
        @Override
        public void onMenuTabSelected(@IdRes int menuItemId) {
            if(menuItemId == R.id.BottomBarItemOne){
                PeopleFragment p = new PeopleFragment();
                getSupportFragmentManager().beginTransaction().replace(R.id.frame,p).commit();
            }
            else if(menuItemId == R.id.BottomBarItemTwo){
                LocationFragment l = new LocationFragment();
                getSupportFragmentManager().beginTransaction().replace(R.id.frame,l).commit();
            }
            else if(menuItemId == R.id.BottomBarItemThree){
                HistoryFragment h = new HistoryFragment();
                getSupportFragmentManager().beginTransaction().replace(R.id.frame,h).commit();
            }
            else if(menuItemId == R.id.BottomBarItemFour){
                LikesFragment li = new LikesFragment();
                getSupportFragmentManager().beginTransaction().replace(R.id.frame,li).commit();
            }
        }

Now I want to create a tabview in on one of the Fragment : For that I implement toolbar,tablayout and viewpager in required fragment xml file. I created a separate java file contain viewPagerAdapter class.

public class viewPagerAdapter extends FragmentPagerAdapter {

ArrayList<Fragment> fragments = new ArrayList<>(); // this line can cause crashes
ArrayList<String> tabTitles = new ArrayList<>();

   public void addFragment(Fragment fragment,String tabTitle){
      fragments.add(fragment); // this line can cause crashes
      tabTitles.add(tabTitle);
   }

   public viewPagerAdapter(FragmentManager fm) {
      super(fm);
   }

   @Override
   public Fragment getItem(int position) {
       return fragments.get(position);
    }

   @Override
   public int getCount() {
      return fragments.size();
   }

   @Override
   public CharSequence getPageTitle(int position) {
      return tabTitles.get(position);
   }
}

Now I want to add this code to implement tablayout ::

 toolbar = (Toolbar) findViewById(R.id.toolBar);
    setSupportActionBar(toolbar);

    tabLayout = (TabLayout) findViewById(R.id.tabLayout);
    viewPager = (ViewPager) findViewById(R.id.viewPager);

    viewPagerAdapter = new viewPagerAdapter(getSupportFragmentManager());
    viewPagerAdapter.addFragment(new HomeFragment(),"Home"); // this line can cause crashes
    viewPagerAdapter.addFragment(new MessageFragment(),"Message"); // this line can cause crashes
    viewPagerAdapter.addFragment(new ContectFragment(),"Contect"); // this line can cause crashes
    viewPager.setAdapter(viewPagerAdapter);
    tabLayout.setupWithViewPager(viewPager);

In Fragment's onCreate method Given below ::

public class HomeFragment extends Fragment {


    public HomeFragment() {
       // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

       // TabLyout Code Here

        return inflater.inflate(R.layout.fragment_home, container, false);
    }
 }

But Android Studio doesn't allow Tablayout Fragment code in Fragment.
What Can I do ? How can I implement tablayout in one of the fragment?

Answer 1

Try the following approach : Add this to your fragment layout as per your requirement.

 <android.support.design.widget.TabLayout
            android:id="@+id/tab_layout"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="50dp"
            android:minHeight="?attr/actionBarSize"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            app:tabIndicatorColor="@color/tab_indicator"
            app:tabIndicatorHeight="2.5dp"
            app:tabPaddingBottom="-1dp"
            app:tabPaddingEnd="-1dp"
            app:tabPaddingStart="-1dp"
            app:tabPaddingTop="-1dp"
            app:tabBackground="@color/white"/>

1. Create one model for your tabs which you want to show.

2. Now add the following code in your fragment:

   this.navigationData = new ArrayList<>();
   this.navigationData.add(new MainNavigationViewModel("TAB-1",     R.drawable.TAB-1, R.drawable.TAB-1, true));
   this.navigationData.add(new MainNavigationViewModel("TAB-2", R.drawable.TAB-2, R.drawable.TAB-2, false));
   this.navigationData.add(new MainNavigationViewModel("TAB-3", R.drawable.TAB-3, R.drawable.TAB-23, false));
   
   for (MainNavigationViewModel vm : this.navigationData) {
       tabLayout.addTab(tabLayout.newTab().setCustomView(ViewHelper.buildTabWithText(getContext(), vm.getText(), vm.getIsSelected())));
   }
   tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
   
   adapter = new MainFragmentPagerAdapter(getChildFragmentManager(), tabLayout.getTabCount());
   viewPager.setAdapter(adapter);
   

3. Now create FragmentPagerAdapter (New class) like this.

   public class MainFragmentPagerAdapter extends FragmentPagerAdapter {
       private interface FragmentFactory {
           Fragment create();
       }
   
       private static final FragmentFactory[] fragments = new FragmentFactory[] {
               () -> LiveFeedFragment.getInstance(),
               () -> GroupsFragment.getInstance(),
               () -> NewsFragment.getInstance()
       };
   
   
       public MainFragmentPagerAdapter(FragmentManager fm) {
           super(fm);
       }
   
       @Override
       public int getItemPosition(Object object) {
           return POSITION_NONE;
       }
   
       @Override
       public Fragment getItem(int position) {
           return fragments[position].create();
       }
   
       @Override
       public int getCount() {
           return fragments.length;
       }
   }
   

And access the fragment like this way.