Android中如何利用BottomNavigationBar实现底部导航栏

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初始化及相关设置：

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的切换：

@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();      }

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