blocks|key|4388014|text|在BottomNavigationView类中有一个BottomNavigationMenuView字段，在BottomNavigationMenuView中有一个BottomNavigationItemView[]字段，这是底部栏中的项。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4388015|假设n是项数，BottomNavigationMenuView将对BottomNavigationItemView[]数组的每个成员调用BottomNavigationItemView.setShiftingMode(n>3)。此函数决定行为(始终显示标题或仅在选择时显示标题)。|4388016|因此，始终显示标题的方法是尝试调用此方法，您可以使用反射来访问私有字段。|4388017|++++BottomNavigationView+bottomNavigationView=+(BottomNavigationView)+findViewById(R.id.bottom_navigation);


//++get+the+private+BottomNavigationMenuView+field+
++++++++Field+f+=+null;
++++++++try+{
++++++++++++f+=+bottomNavigationView.getClass().getDeclaredField("mMenuView");
++++++++}+catch+(NoSuchFieldException+e)+{
++++++++++++e.printStackTrace();
++++++++}
++++++++f.setAccessible(true);
++++++++BottomNavigationMenuView+menuView=null;
++++++++try+{
+++++++++++++menuView+=+(BottomNavigationMenuView)+f.get(bottomNavigationView);+
++++++++}+catch+(IllegalAccessException+e)+{
++++++++++++e.printStackTrace();
++++++++}

//++get+the+private+BottomNavigationItemView[]++field+
++++++++try+{
++++++++++++f=menuView.getClass().getDeclaredField("mButtons");
++++++++}+catch+(NoSuchFieldException+e)+{
++++++++++++e.printStackTrace();
++++++++}
++++++++f.setAccessible(true);
++++++++BottomNavigationItemView[]+mButtons=null;
++++++++try+{
++++++++++++mButtons+=+(BottomNavigationItemView[])+f.get(menuView);+
++++++++}+catch+(IllegalAccessException+e)+{
++++++++++++e.printStackTrace();
++++++++}


++++++++for(int+i=0;i<mButtons.length;i%2B%2B){
++++++++++++mButtons[i].setShiftingMode(false);
++++++++++++mButtons[i].setChecked(true);
++++++++}|code-block|syntax|javascript|4388018|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

in BottomNavigationView class there is a BottomNavigationMenuView field and in BottomNavigationMenuView there is a BottomNavigationItemView[] field, which is the items in the bottom bar. 

Say n is the number of items, BottomNavigationMenuView will call BottomNavigationItemView.setShiftingMode(n>3) on each member of the BottomNavigationItemView[] array. This function decides the behaviour (show title always or only upon selection). 

so the way to always show the titles is to try to call this method and you can use reflection to access the private fields.

<pre><code> BottomNavigationView bottomNavigationView= (BottomNavigationView) findViewById(R.id.bottom_navigation);


// get the private BottomNavigationMenuView field 
 Field f = null;
 try {
 f = bottomNavigationView.getClass().getDeclaredField("mMenuView");
 } catch (NoSuchFieldException e) {
 e.printStackTrace();
 }
 f.setAccessible(true);
 BottomNavigationMenuView menuView=null;
 try {
 menuView = (BottomNavigationMenuView) f.get(bottomNavigationView); 
 } catch (IllegalAccessException e) {
 e.printStackTrace();
 }

// get the private BottomNavigationItemView[] field 
 try {
 f=menuView.getClass().getDeclaredField("mButtons");
 } catch (NoSuchFieldException e) {
 e.printStackTrace();
 }
 f.setAccessible(true);
 BottomNavigationItemView[] mButtons=null;
 try {
 mButtons = (BottomNavigationItemView[]) f.get(menuView); 
 } catch (IllegalAccessException e) {
 e.printStackTrace();
 }


 for(int i=0;i&lt;mButtons.length;i++){
 mButtons[i].setShiftingMode(false);
 mButtons[i].setChecked(true);
 }
</code></pre>

blocks|key|4387535|text|这在版本25中是困难的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4387536|试试这段代码。但我认为这不是一个好的解决方案。|4387537|BottomNavigationView+navigationView+=+(BottomNavigationView)+findViewById(R.id.bottomBar);
BottomNavigationMenuView+menuView+=+(BottomNavigationMenuView)+navigationView.getChildAt(0);
for+(int+i+=+0;+i+<+menuView.getChildCount();+i%2B%2B)+{
++++BottomNavigationItemView+itemView+=+(BottomNavigationItemView)+menuView.getChildAt(i);
++++itemView.setShiftingMode(false);
++++itemView.setChecked(false);
}|code-block|syntax|javascript|4387538|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

It is difficult in version 25.

Try this code. But I think it's not good solution.

<pre class="lang-java prettyprint-override"><code>BottomNavigationView navigationView = (BottomNavigationView) findViewById(R.id.bottomBar);
BottomNavigationMenuView menuView = (BottomNavigationMenuView) navigationView.getChildAt(0);
for (int i = 0; i &lt; menuView.getChildCount(); i++) {
 BottomNavigationItemView itemView = (BottomNavigationItemView) menuView.getChildAt(i);
 itemView.setShiftingMode(false);
 itemView.setChecked(false);
}
</code></pre>

blocks|key|4387716|text|你想要这样的效果吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4387717|​|4387718|📷|atomic|offset|length|4387719|4387720|4387721|4387722|4387723|如果是这样的话，我建议你试试BottomNavigationViewEx。|4387724|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/ece56a53e4f028af4566b55d0b58455b.gif|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/9c6229dbb1f6cbc42db00a22570ad5f1.gif|2|LINK|MUTABLE|url|https://github.com/ittianyu/BottomNavigationViewEx^0|0|0|0|1|0|0|0|0|0|1|1|0|0|E|M|2|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|16|8|@]|9|@$G|17|H|18|1|19]]|A|$]]|$1|I|3|C|5|6|7|1A|8|@]|9|@]|A|$]]|$1|J|3|C|5|6|7|1B|8|@]|9|@]|A|$]]|$1|K|3|E|5|F|7|1C|8|@]|9|@$G|1D|H|1E|1|1F]]|A|$]]|$1|L|3|C|5|6|7|1G|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1H|8|@]|9|@$G|1I|H|1J|1|1K]]|A|$]]|$1|O|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V|W|-4]]|X|$5|R|S|T|A|$U|Y|W|-4]]|Z|$5|10|S|11|A|$12|13]]]]

Are you want to this effect ? 

<img src="https://github.com/ittianyu/BottomNavigationViewEx/raw/master/read_me_images/no_animation_shifting_mode_item_shifting_mode.gif" alt="Click here to view the image">

<img src="https://github.com/ittianyu/BottomNavigationViewEx/raw/master/read_me_images/no_item_shifting_mode.gif" alt="">

If so, I recommended you to try <a href="https://github.com/ittianyu/BottomNavigationViewEx" rel="noreferrer">BottomNavigationViewEx</a>。

blocks|key|4387735|text|来显示所有的标题。试试这个Kotlin代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4387736|@SuppressLint("RestrictedApi")
override+fun+onCreate(savedInstanceState:+Bundle?)+{
++++super.onCreate(savedInstanceState)
++++setContentView(R.layout.activity_ofree)

++++navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener)

++++val+menuView+=+navigation.getChildAt(0)+as+BottomNavigationMenuView
++++for+(i+in+0+until+menuView.childCount)+{
++++++++val+itemView+=+menuView.getChildAt(i)+as+BottomNavigationItemView
++++++++itemView.setShiftingMode(false)
++++++++itemView.setChecked(false)
++++}
}|code-block|syntax|javascript|4387737|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

To show the titles all the way. Try this Kotlin code:

<pre><code>@SuppressLint("RestrictedApi")
override fun onCreate(savedInstanceState: Bundle?) {
 super.onCreate(savedInstanceState)
 setContentView(R.layout.activity_ofree)

 navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener)

 val menuView = navigation.getChildAt(0) as BottomNavigationMenuView
 for (i in 0 until menuView.childCount) {
 val itemView = menuView.getChildAt(i) as BottomNavigationItemView
 itemView.setShiftingMode(false)
 itemView.setChecked(false)
 }
}
</code></pre>

blocks|key|4388242|text|这是一个Kotlin扩展函数，它结合了@STAR_ZERO和@KishanSolanki124的解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4388243|fun+BottomNavigationView.disableShiftMode()+{
++++val+menuView+=+getChildAt(0)+as+BottomNavigationMenuView

++++menuView.javaClass.getDeclaredField("mShiftingMode").apply+{
++++++++isAccessible+=+true
++++++++setBoolean(menuView,+false)
++++++++isAccessible+=+false
++++}

++++@SuppressLint("RestrictedApi")
++++for+(i+in+0+until+menuView.childCount)+{
++++++++(menuView.getChildAt(i)+as+BottomNavigationItemView).apply+{
++++++++++++setShiftingMode(false)
++++++++++++setChecked(false)
++++++++}
++++}
}|code-block|syntax|javascript|4388244|要使用它：|4388245|myBottomNavigation.disableShiftMode()|4388246|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|$]]

Here's a Kotlin extension function that combines @STAR_ZERO and @KishanSolanki124's solution.



<pre class="lang-java prettyprint-override"><code>fun BottomNavigationView.disableShiftMode() {
 val menuView = getChildAt(0) as BottomNavigationMenuView

 menuView.javaClass.getDeclaredField("mShiftingMode").apply {
 isAccessible = true
 setBoolean(menuView, false)
 isAccessible = false
 }

 @SuppressLint("RestrictedApi")
 for (i in 0 until menuView.childCount) {
 (menuView.getChildAt(i) as BottomNavigationItemView).apply {
 setShiftingMode(false)
 setChecked(false)
 }
 }
}
</code></pre>

To use it:

<pre class="lang-java prettyprint-override"><code>myBottomNavigation.disableShiftMode()
</code></pre>

blocks|key|4387831|text|对于任何仍在寻找解决方案并且不想依赖于第三方库或运行时反射的人，Support+Library+28/Jetpack中的BottomNavigationView本机支持始终具有文本标签。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4387832|This是您正在寻找的方法。|offset|length|4387833|或者在XML中，app:labelVisibilityMode="labeled"|style|CODE|4387834|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.android.com/reference/com/google/android/material/bottomnavigation/BottomNavigationView#setlabelvisibilitymode^0|0|0|4|0|0|8|X|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@$D|X|E|Y|H|I]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]]]

For anyone still looking for a solution and doesn't want to rely on third party libraries or runtime reflection, BottomNavigationView in Support Library 28/Jetpack natively supports always having text label. 

<a href="https://developer.android.com/reference/com/google/android/material/bottomnavigation/BottomNavigationView#setlabelvisibilitymode" rel="noreferrer">This</a> is the method you're looking for. 

Or in XML, <code>app:labelVisibilityMode="labeled"</code>

blocks|key|4387937|text|您可以使用它在BottomNevigationView上同时显示文本和图标|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4387938|app:labelVisibilityMode="labeled"|code-block|syntax|javascript|4387939|如果您正在使用此功能，则可以同时查看图标和文本|4387940|<android.support.design.widget.BottomNavigationView
++++app:labelVisibilityMode="labeled"
++++android:layout_width="match_parent"
++++android:layout_height="wrap_content"
++++android:id="@%2Bid/bottom_navigation_view"
++++android:layout_alignParentBottom="true"
++++app:menu="@menu/bottom_navigation_menu"/>|4387941|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 use this for showing both text and icons on BottomNevigationView 

<pre><code>app:labelVisibilityMode="labeled"
</code></pre>

If you are using this you will be able to view both icon and text

<pre><code>&lt;android.support.design.widget.BottomNavigationView
 app:labelVisibilityMode="labeled"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:id="@+id/bottom_navigation_view"
 android:layout_alignParentBottom="true"
 app:menu="@menu/bottom_navigation_menu"/&gt;
</code></pre>

I am using android.support.design.widget.BottomNavigationView from design support library version 25

<pre><code>compile 'com.android.support:design:25.0.0'

&lt;android.support.design.widget.BottomNavigationView
 android:id="@+id/bottomBar"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_alignParentBottom="true"
 android:layout_gravity="center"
 app:itemBackground="@color/colorPrimary"
 app:menu="@menu/bottom_navigation_main"
 android:forceHasOverlappingRendering="true"/&gt;
</code></pre>

When there are only three actions in @menu/bottom_navigation_main, it displays both icons and text labels at all times.

What is the way to display both icons and text labels at all the time when there are more than three actions.

BottomNavigationView display both icons and text labels at all times

Kotlin

我使用的是来自设计支持库版本25的android.support.design.widget.BottomNavigationViewcompile 'com.android.support:design:25.0.0'<android.support.design.widget.BottomNavigationVie...

问BottomNavigationView始终同时显示图标和文本标签
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