blocks|key|4427656|text|您可以尝试的其他备用库:-+https://github.com/Ashok-Varma/BottomNavigation|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4427657|<com.ashokvarma.bottomnavigation.BottomNavigationBar
++++android:layout_gravity="bottom"
++++android:id="@%2Bid/bottom_navigation_bar"
++++android:layout_width="match_parent"
++++android:layout_height="wrap_content"/>

BottomNavigationBar+bottomNavigationBar+=+(BottomNavigationBar)+findViewById(R.id.bottom_navigation_bar);

bottomNavigationBar
++++++++++++++++.addItem(new+BottomNavigationItem(R.drawable.ic_home_white_24dp,+"Home"))
++++++++++++++++.addItem(new+BottomNavigationItem(R.drawable.ic_book_white_24dp,+"Books"))
++++++++++++++++.addItem(new+BottomNavigationItem(R.drawable.ic_music_note_white_24dp,+"Music"))
++++++++++++++++.addItem(new+BottomNavigationItem(R.drawable.ic_tv_white_24dp,+"Movies+&+TV"))
++++++++++++++++.addItem(new+BottomNavigationItem(R.drawable.ic_videogame_asset_white_24dp,+"Games"))
++++++++++++++++.initialise();|code-block|syntax|javascript|4427658|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/Ashok-Varma/BottomNavigation^0|E|1B|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Other alternate library you can try :- <a href="https://github.com/Ashok-Varma/BottomNavigation">https://github.com/Ashok-Varma/BottomNavigation</a>

<pre><code>&lt;com.ashokvarma.bottomnavigation.BottomNavigationBar
 android:layout_gravity="bottom"
 android:id="@+id/bottom_navigation_bar"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"/&gt;

BottomNavigationBar bottomNavigationBar = (BottomNavigationBar) findViewById(R.id.bottom_navigation_bar);

bottomNavigationBar
 .addItem(new BottomNavigationItem(R.drawable.ic_home_white_24dp, "Home"))
 .addItem(new BottomNavigationItem(R.drawable.ic_book_white_24dp, "Books"))
 .addItem(new BottomNavigationItem(R.drawable.ic_music_note_white_24dp, "Music"))
 .addItem(new BottomNavigationItem(R.drawable.ic_tv_white_24dp, "Movies &amp; TV"))
 .addItem(new BottomNavigationItem(R.drawable.ic_videogame_asset_white_24dp, "Games"))
 .initialise();
</code></pre>

blocks|key|4427699|text|我做了一个私有类，它使用了网格视图和菜单资源：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4427700|private+class+BottomBar+{

++++private+GridView+mGridView;
++++private+Menu+++++mMenu;
++++private+BottomBarAdapter+mBottomBarAdapter;
++++private+View.OnClickListener+mOnClickListener;

++++public+BottomBar+(@IdRes+int+gridviewId,+@MenuRes+int+menuRes,View.OnClickListener+onClickListener)+{
++++++++this.mGridView+=+(GridView)+findViewById(gridviewId);
++++++++this.mMenu+=+getMenu(menuRes);
++++++++this.mOnClickListener+=+onClickListener;

++++++++this.mBottomBarAdapter+=+new+BottomBarAdapter();
++++++++this.mGridView.setAdapter(mBottomBarAdapter);
++++}

++++private+Menu+getMenu(@MenuRes+int+menuId)+{
++++++++PopupMenu+p+=+new+PopupMenu(MainActivity.this,null);
++++++++Menu+menu+=+p.getMenu();
++++++++getMenuInflater().inflate(menuId,menu);
++++++++return+menu;
++++}

++++public+GridView+getGridView(){
++++++++return+mGridView;
++++}

++++public+void+show()+{
++++++++mGridView.setVisibility(View.VISIBLE);
++++++++mGridView.animate().translationY(0);
++++}

++++public+void+hide()+{
++++++++mGridView.animate().translationY(mGridView.getHeight());
++++}



++++private+class+BottomBarAdapter+extends+BaseAdapter+{

++++++++private+LayoutInflater++++mInflater;

++++++++public+BottomBarAdapter(){
++++++++++++this.mInflater+=+LayoutInflater.from(MainActivity.this);
++++++++}

++++++++@Override
++++++++public+int+getCount()+{
++++++++++++return+mMenu.size();
++++++++}

++++++++@Override
++++++++public+Object+getItem(int+i)+{
++++++++++++return+mMenu.getItem(i);
++++++++}

++++++++@Override
++++++++public+long+getItemId(int+i)+{
++++++++++++return+0;
++++++++}

++++++++@Override
++++++++public+View+getView(int+i,+View+view,+ViewGroup+viewGroup)+{

++++++++++++MenuItem+item+=+(MenuItem)+getItem(i);

++++++++++++if+(view==null){
++++++++++++++++view+=+mInflater.inflate(R.layout.your_item_layout,null);
++++++++++++++++view.setId(item.getItemId());
++++++++++++}

++++++++++++view.setOnClickListener(mOnClickListener);
++++++++++++view.findViewById(R.id.bottomnav_icon).setBackground(item.getIcon());
++++++++++++((TextView)+view.findViewById(R.id.bottomnav_label)).setText(item.getTitle());

++++++++++++return+view;
++++++++}
++++}|code-block|syntax|javascript|4427701|your_menu.xml：|4427702|<?xml+version="1.0"+encoding="utf-8"?>
<menu+xmlns:android="http://schemas.android.com/apk/res/android">
++++<item+android:id="@%2Bid/item1_id"
++++++++android:icon="@drawable/ic_item1"
++++++++android:title="@string/title_item1"/>
++++<item+android:id="@%2Bid/item2_id"
++++++++android:icon="@drawable/ic_item2"
++++++++android:title="@string/title_item2"/>
++++...
</menu>|4427703|和自定义布局项your_item_layout.xml|4427704|<?xml+version="1.0"+encoding="utf-8"?>
<LinearLayout+xmlns:android="http://schemas.android.com/apk/res/android"
++++android:layout_width="wrap_content"+android:layout_height="wrap_content"
++++android:orientation="vertical"
++++android:layout_margin="16dp">
++++<ImageButton+android:id="@%2Bid/bottomnav_icon"
++++++++android:layout_width="24dp"
++++++++android:layout_height="24dp"
++++++++android:layout_gravity="top%7Ccenter_horizontal"
++++++++android:layout_marginTop="8dp"
++++++++android:layout_marginBottom="4dp"/>
++++<TextView+android:id="@%2Bid/bottomnav_label"
++++++++android:layout_width="wrap_content"
++++++++android:layout_height="wrap_content"
++++++++android:layout_gravity="bottom%7Ccenter_horizontal"
++++++++android:layout_marginBottom="8dp"
++++++++android:layout_marginTop="4dp"
++++++++style="@style/mystyle_label"+/>
</LinearLayout>|4427705|在你的主要活动中的使用：|4427706|BottomBar+bottomBar+=+new+BottomBar(R.id.YourGridView,R.menu.your_menu,+mOnClickListener);|4427707|和|4427708|private+View.OnClickListener+mOnClickListener+=+new+View.OnClickListener()+{
++++@Override
++++public+void+onClick(View+view)+{
++++++++switch+(view.getId())+{
++++++++++++case+R.id.item1_id:
++++++++++++++++//todo+item1
++++++++++++++++break;
++++++++++++case+R.id.item2_id:
++++++++++++++++//todo+item2
++++++++++++++++break;
++++++++++++...
++++++++}
++++}
}|4427709|在layout_activity.xml中|4427710|<?xml+version="1.0"+encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout+
++++xmlns:android="http://schemas.android.com/apk/res/android"
++++xmlns:app="http://schemas.android.com/apk/res-auto"
++++xmlns:tools="http://schemas.android.com/tools"
++++android:layout_width="match_parent"
++++android:layout_height="match_parent"
++++android:fitsSystemWindows="true">
++++...
++++<FrameLayout+android:id="@%2Bid/fragment_container"
++++++++android:layout_width="match_parent"
++++++++android:layout_height="match_parent"
++++++++app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

++++<GridView+android:id="@%2Bid/bottomNav"
++++++++android:layout_width="match_parent"
++++++++android:layout_height="wrap_content"
++++++++android:background="@color/your_background_color"
++++++++android:verticalSpacing="0dp"
++++++++android:horizontalSpacing="0dp"
++++++++android:numColumns="4"
++++++++android:stretchMode="columnWidth"
++++++++app:layout_anchor="@id/fragment_container"
++++++++app:layout_anchorGravity="bottom"/>
</android.support.design.widget.CoordinatorLayout>|4427711|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|16|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|18|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|19|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|1A|8|@]|9|@]|A|$]]|$1|U|3|V|5|D|7|1B|8|@]|9|@]|A|$E|F]]|$1|W|3|X|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|D|7|1D|8|@]|9|@]|A|$E|F]]|$1|10|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|11|$]]

i've made a private class which uses a gridview and a menu resource:

<pre><code>private class BottomBar {

 private GridView mGridView;
 private Menu mMenu;
 private BottomBarAdapter mBottomBarAdapter;
 private View.OnClickListener mOnClickListener;

 public BottomBar (@IdRes int gridviewId, @MenuRes int menuRes,View.OnClickListener onClickListener) {
 this.mGridView = (GridView) findViewById(gridviewId);
 this.mMenu = getMenu(menuRes);
 this.mOnClickListener = onClickListener;

 this.mBottomBarAdapter = new BottomBarAdapter();
 this.mGridView.setAdapter(mBottomBarAdapter);
 }

 private Menu getMenu(@MenuRes int menuId) {
 PopupMenu p = new PopupMenu(MainActivity.this,null);
 Menu menu = p.getMenu();
 getMenuInflater().inflate(menuId,menu);
 return menu;
 }

 public GridView getGridView(){
 return mGridView;
 }

 public void show() {
 mGridView.setVisibility(View.VISIBLE);
 mGridView.animate().translationY(0);
 }

 public void hide() {
 mGridView.animate().translationY(mGridView.getHeight());
 }



 private class BottomBarAdapter extends BaseAdapter {

 private LayoutInflater mInflater;

 public BottomBarAdapter(){
 this.mInflater = LayoutInflater.from(MainActivity.this);
 }

 @Override
 public int getCount() {
 return mMenu.size();
 }

 @Override
 public Object getItem(int i) {
 return mMenu.getItem(i);
 }

 @Override
 public long getItemId(int i) {
 return 0;
 }

 @Override
 public View getView(int i, View view, ViewGroup viewGroup) {

 MenuItem item = (MenuItem) getItem(i);

 if (view==null){
 view = mInflater.inflate(R.layout.your_item_layout,null);
 view.setId(item.getItemId());
 }

 view.setOnClickListener(mOnClickListener);
 view.findViewById(R.id.bottomnav_icon).setBackground(item.getIcon());
 ((TextView) view.findViewById(R.id.bottomnav_label)).setText(item.getTitle());

 return view;
 }
 }
</code></pre>

your_menu.xml:

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;menu xmlns:android="http://schemas.android.com/apk/res/android"&gt;
 &lt;item android:id="@+id/item1_id"
 android:icon="@drawable/ic_item1"
 android:title="@string/title_item1"/&gt;
 &lt;item android:id="@+id/item2_id"
 android:icon="@drawable/ic_item2"
 android:title="@string/title_item2"/&gt;
 ...
&lt;/menu&gt;
</code></pre>

and a custom layout item your_item_layout.xml

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="wrap_content" android:layout_height="wrap_content"
 android:orientation="vertical"
 android:layout_margin="16dp"&gt;
 &lt;ImageButton android:id="@+id/bottomnav_icon"
 android:layout_width="24dp"
 android:layout_height="24dp"
 android:layout_gravity="top|center_horizontal"
 android:layout_marginTop="8dp"
 android:layout_marginBottom="4dp"/&gt;
 &lt;TextView android:id="@+id/bottomnav_label"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_gravity="bottom|center_horizontal"
 android:layout_marginBottom="8dp"
 android:layout_marginTop="4dp"
 style="@style/mystyle_label" /&gt;
&lt;/LinearLayout&gt;
</code></pre>

usage inside your mainactivity:

<pre><code>BottomBar bottomBar = new BottomBar(R.id.YourGridView,R.menu.your_menu, mOnClickListener);
</code></pre>

and

<pre><code>private View.OnClickListener mOnClickListener = new View.OnClickListener() {
 @Override
 public void onClick(View view) {
 switch (view.getId()) {
 case R.id.item1_id:
 //todo item1
 break;
 case R.id.item2_id:
 //todo item2
 break;
 ...
 }
 }
}
</code></pre>

and in layout_activity.xml

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;android.support.design.widget.CoordinatorLayout 
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:fitsSystemWindows="true"&gt;
 ...
 &lt;FrameLayout android:id="@+id/fragment_container"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 app:layout_behavior="@string/appbar_scrolling_view_behavior"/&gt;

 &lt;GridView android:id="@+id/bottomNav"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:background="@color/your_background_color"
 android:verticalSpacing="0dp"
 android:horizontalSpacing="0dp"
 android:numColumns="4"
 android:stretchMode="columnWidth"
 app:layout_anchor="@id/fragment_container"
 app:layout_anchorGravity="bottom"/&gt;
&lt;/android.support.design.widget.CoordinatorLayout&gt;
</code></pre>

blocks|key|4427711|text|<android.support.design.widget.BottomNavigationView
++++android:id="@%2Bid/navigation"
++++android:layout_width="match_parent"
++++android:layout_height="wrap_content"
++++android:layout_gravity="bottom"
++++android:background="?android:attr/windowBackground"
++++app:menu="@menu/navigation"+/>|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4427712|Navigation.xml(内部菜单)|unstyled|4427713|<?xml+version="1.0"+encoding="utf-8"?>
<menu+xmlns:android="http://schemas.android.com/apk/res/android"
++++xmlns:app="http://schemas.android.com/apk/res-auto">

++++<item
++++++++android:id="@%2Bid/navigation_home"
++++++++android:icon="@drawable/ic_home_black_24dp"
++++++++android:title="@string/title_home"
++++++++app:showAsAction="always%7CwithText"
++++++++android:enabled="true"/>|4427714|在onCreate()方法中，|offset|length|style|CODE|4427715|BottomNavigationView+navigation+=+(BottomNavigationView)findViewById(R.id.navigation);
//Dont+forgot+this+line+++++
BottomNavigationViewHelper.disableShiftMode(navigation);|4427716|创建类，如下所示。|4427717|public+class+BottomNavigationViewHelper+{
++++public+static+void+disableShiftMode(BottomNavigationView+view)+{
++++++++BottomNavigationMenuView+menuView+=+(BottomNavigationMenuView)+view.getChildAt(0);
++++++++try+{
++++++++++++Field+shiftingMode+=+menuView.getClass().getDeclaredField("mShiftingMode");
++++++++++++shiftingMode.setAccessible(true);
++++++++++++shiftingMode.setBoolean(menuView,+false);
++++++++++++shiftingMode.setAccessible(false);
++++++++++++for+(int+i+=+0;+i+<+menuView.getChildCount();+i%2B%2B)+{
++++++++++++++++BottomNavigationItemView+item+=+(BottomNavigationItemView)+menuView.getChildAt(i);
++++++++++++++++//noinspection+RestrictedApi
++++++++++++++++item.setShiftingMode(false);
++++++++++++++++//+set+once+again+checked+value,+so+view+will+be+updated
++++++++++++++++//noinspection+RestrictedApi
++++++++++++++++item.setChecked(item.getItemData().isChecked());
++++++++++++}
++++++++}+catch+(NoSuchFieldException+e)+{
++++++++++++Log.e("BNVHelper",+"Unable+to+get+shift+mode+field",+e);
++++++++}+catch+(IllegalAccessException+e)+{
++++++++++++Log.e("BNVHelper",+"Unable+to+change+value+of+shift+mode",+e);
++++++++}
++++}
}|4427718|entityMap^0|0|0|0|1|A|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|X|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|Z|8|@$K|10|L|11|M|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|12|8|@]|9|@]|A|$B|C]]|$1|Q|3|R|5|F|7|13|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|14|8|@]|9|@]|A|$B|C]]|$1|U|3|-4|5|F|7|15|8|@]|9|@]|A|$]]]|V|$]]

<pre><code>&lt;android.support.design.widget.BottomNavigationView
 android:id="@+id/navigation"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_gravity="bottom"
 android:background="?android:attr/windowBackground"
 app:menu="@menu/navigation" /&gt;
</code></pre>

navigation.xml(inside menu)

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;menu xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"&gt;

 &lt;item
 android:id="@+id/navigation_home"
 android:icon="@drawable/ic_home_black_24dp"
 android:title="@string/title_home"
 app:showAsAction="always|withText"
 android:enabled="true"/&gt;
</code></pre>

Inside <code>onCreate()</code> method,

<pre><code>BottomNavigationView navigation = (BottomNavigationView)findViewById(R.id.navigation);
//Dont forgot this line 
BottomNavigationViewHelper.disableShiftMode(navigation);
</code></pre>

And Create class as below.

<pre><code>public class BottomNavigationViewHelper {
 public static void disableShiftMode(BottomNavigationView view) {
 BottomNavigationMenuView menuView = (BottomNavigationMenuView) view.getChildAt(0);
 try {
 Field shiftingMode = menuView.getClass().getDeclaredField("mShiftingMode");
 shiftingMode.setAccessible(true);
 shiftingMode.setBoolean(menuView, false);
 shiftingMode.setAccessible(false);
 for (int i = 0; i &lt; menuView.getChildCount(); i++) {
 BottomNavigationItemView item = (BottomNavigationItemView) menuView.getChildAt(i);
 //noinspection RestrictedApi
 item.setShiftingMode(false);
 // set once again checked value, so view will be updated
 //noinspection RestrictedApi
 item.setChecked(item.getItemData().isChecked());
 }
 } catch (NoSuchFieldException e) {
 Log.e("BNVHelper", "Unable to get shift mode field", e);
 } catch (IllegalAccessException e) {
 Log.e("BNVHelper", "Unable to change value of shift mode", e);
 }
 }
}
</code></pre>

blocks|key|4427727|text|这个库BottomNavigationViewEx扩展了谷歌的BottomNavigationView。你可以很容易地定制Google的库，让它有你想要的底部导航栏。你可以关闭移位模式，改变图标和文本的可见性等等。一定要试一试。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4427728|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/ittianyu/BottomNavigationViewEx^0|3|M|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

This library, <a href="https://github.com/ittianyu/BottomNavigationViewEx" rel="nofollow noreferrer">BottomNavigationViewEx</a>, extends Google's BottomNavigationView. You can easily customise Google's library to have bottom navigation bar the way you want it to be. You can disable the shifting mode, change visibility of the icons and texts and so much more. Definitely try it out.

blocks|key|4427790|text|如果任何人想在kotlin中使用这个，你可以根据上面提到的答案创建布局：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4427791|+private+val+mOnNavigationItemSelectedListener+=+BottomNavigationView.OnNavigationItemSelectedListener+{+item+->
++++when+(item.itemId)+{
++++++++R.id.images+->+{
++++++++++//+do+your+work....
++++++++++++return@OnNavigationItemSelectedListener+true
++++++++}
+++++++R.id.videos+->
+++++++++{
++++++++++//+do+your+work....
++++++++++++return@OnNavigationItemSelectedListener+true
++++++++}
++++}
++++false
}|code-block|syntax|javascript|4427792|然后，在oncreate中，您可以将上面的监听器设置为您的视图|4427793|+++mDataBinding?.navigation?.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener)|4427794|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You can create the layouts according to the above-mentioned answers 
If anyone wants to use this in kotlin:-

<pre><code> private val mOnNavigationItemSelectedListener = BottomNavigationView.OnNavigationItemSelectedListener { item -&gt;
 when (item.itemId) {
 R.id.images -&gt; {
 // do your work....
 return@OnNavigationItemSelectedListener true
 }
 R.id.videos -&gt;
 {
 // do your work....
 return@OnNavigationItemSelectedListener true
 }
 }
 false
}
</code></pre>

then in oncreate you can set the above listener to your view 

<pre><code> mDataBinding?.navigation?.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener)
</code></pre>

Saw the new guideline came out, and used in <code>google photos</code> latest app.
Have no idea how to use the new Bottom Navigation Bar.
See through the new support lib, didn't find any lead.

<img src="https://i.stack.imgur.com/6lcXBm.png" alt="enter image description here">

Can not find any official sample.

How to use the new Bottom bar? Don't want to do any customize.

Android new Bottom Navigation bar or BottomNavigationView

看到新的指南出来了，并在google photos最新的应用程序中使用。不知道如何使用新的底部导航栏。通过新的支持库，没有发现任何线索。​​找不到任何官方样品。如何使用新的底部栏？我不想做任何定制。

问安卓新的底部导航栏或BottomNavigationView
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