Android: how to load fragment into FrameLayout

Question

I\'m starting with Android and in my project I\'m using this BottomBar. Love it, works pretty well. The code of my application is almost identical on to the one he uses in t

Answer 1

First you have a mistake in your Fragment transaction line, according with your layout should be:

transaction.replace(R.id.contentContainer, newFragment); // not R.id.bottomBar

Second, you should use supportFragmentManager instead of fragmentManager to work with support fragments, so implement the following way:

final FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.contentContainer, newFragment);
transaction.addToBackStack(null);
transaction.commit();

Answer 2

            bottomNavigationView= findViewById(R.id.bottom_navigation);
           bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {



               @SuppressLint("NonConstantResourceId")
               @Override
               public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                   Fragment temp =null;
                   switch (item.getItemId()) {
                       case R.id.library:
                            temp = new LibraryFragment();

                           
                           break;
                       case R.id.search:
                           temp = new SearchFragment();
                           break;
                       case R.id.profile:
                           temp = new UserprofileFragment();
                           break;
                       default:
                   }
                  

               getSupportFragmentManager().beginTransaction().replace(R.id.fragment, temp).commit();


                        return true;
               }
           });


    getSupportFragmentManager().beginTransaction().replace(R.id.fragment,new SearchFragment()).commit();

Answer 3

in my case i solve it by using

androidx.fragment.app.FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();

replace your

FragmentTransaction