Android底部导航栏实现（一）之BottomNavigationBar

 BottomNavigationBar这个控件的使用之前已经写过，这里不再赘述，详情请参考BottomNavigationBar的使用。 

下面直接上代码：

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(); 
 
    }  

说明：这几篇文章没有过多的文字叙述，因为这些东西也不是很难，而且都是常用的，相信很多人都了如指掌了，多说亦是废话，直接上代码看的反而更清楚。