第二阶段冲刺（六）

昨天学习了导航栏和Tab的转换

遇到的困难是：发现在部分Android手机上底部会有导航栏，在写xml布局的时候，该导航栏会遮挡住部分布局页面。

今天准备继续学习底部导航栏

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);

@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); 
} 
break;
beginTransaction.commit(); 
}