Android bottom navigation bar implementation (I) BottomNavigationBar

The use of the BottomNavigationBar control has been written before, so I will not repeat it here. For details, please refer to the use of BottomNavigationBar.

Here is the code directly:

Initialization and related settings:

 mBottomNavigationBar = (BottomNavigationBar) view .findViewById(R.id.bottom_navigation_bar);
 mBottomNavigationBar.setBackgroundStyle(BottomNavigationBar.BACKGROUND_STYLE_STATIC);
 mBottomNavigationBar.setMode(BottomNavigationBar.MODE_FIXED); 
 
 mBottomNavigationBar.addItem(new BottomNavigationItem(R.drawable.home_fill, getString(R.string.item_home)).setInactiveIconResource(R.drawable.home).setActiveColorResource(R.color.colorPrimary).setInActiveColorResource(R.color.black_1))
        .addItem(new BottomNavigationItem(R.drawable.location_fill, getString(R.string.item_location)).setInactiveIconResource(R.drawable.location).setActiveColorResource(R.color.colorPrimary).setInActiveColorResource(R.color.black_1))
        .addItem(new BottomNavigationItem(R.drawable.like_fill, getString(R.string.item_like)).setInactiveIconResource(R.drawable. like ).setActiveColorResource(R.color.colorPrimary).setInActiveColorResource(R.color.black_1))
        .addItem(new BottomNavigationItem(R.drawable.person_fill, getString(R.string.item_person)).setInactiveIconResource(R.drawable.person).setActiveColorResource(R.color.colorPrimary).setInActiveColorResource(R.color.black_1))
        .setFirstSelectedPosition(0)
 .initialise(); 
 
 mBottomNavigationBar.setTabSelectedListener(this); 
 
 setDefaultFragment();

Tab switching:

 @Override
 public void onTabSelected( int position) {
        FragmentTransaction beginTransaction = getFragmentManager().beginTransaction(); 
 
 switch (position) {
 case 0:
                if (mHomeFragment == null ) {
                    mHomeFragment = HomeFragment.newInstance(getString(R.string.item_home));
 }
                beginTransaction.replace (R.id.sub_content, mHomeFragment);
 break;
 case 1:
                if (mLocationFragment == null ) {
                    mLocationFragment = LocationFragment.newInstance(getString(R.string.item_location));
 }
                beginTransaction.replace (R.id.sub_content, mLocationFragment);
 break;
 case 2:
                if (mLikeFragment == null ) {
                    mLikeFragment = LikeFragment.newInstance(getString(R.string.item_like));
 }
                beginTransaction.replace (R.id.sub_content, mLikeFragment);
 break;
 case 3:
                if (mPersonFragment == null ) {
                    mPersonFragment = PersonFragment.newInstance(getString(R.string.item_person));
 }
                beginTransaction.replace (R.id.sub_content, mPersonFragment);
 }
        beginTransaction.commit (); 
 
 }

Note: These articles do not have too much text description, because these things are not very difficult, and they are commonly used. I believe that many people are familiar with them. It is nonsense to say more. It is clearer to read the code directly.