Develop Reference

BottomNavigationView - How to disable selected icon highlight

I have a bottomnavigation view that sets an icon depending on the state if it's checked or not.
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="#+id/icon_tree"
android:title="Tree"
android:icon="#drawable/bottomnav_icon_home">
</item>
</menu>
bottomnav_icon_home:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/icon_home_black" android:state_checked="false"/>
<item android:drawable="#drawable/icon_home_green" android:state_checked="true"/>
</selector>
How ever bottomnavigation is automatically highlighting the icon when android:state_checked is true.
How do I completely disable bottomnavigation's icon selection highlight?
I've tried setting app:itemIconTint="#drawable/bottom_navigation_selector" to #null however that doesn't work
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:menu="#menu/bottom_navigation_menu"
android:background="#color/colorWhite"
app:itemTextColor="#drawable/bottom_navigation_selector"
app:itemIconSize="28dp"
app:itemIconTint="#drawable/bottom_navigation_selector"
app:labelVisibilityMode="labeled"/>
bottom_navigation_selector:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true"
android:color="#color/forestGreen" />
<item android:color="#color/colorBlack" />
</selector>

If i understood you right, android by default sets a tint on your bottom navigation icons on selection and you would like it to be removed right.
I know how to do that in your java class not xml though.
You'll need to set setItemIconTintList method of your BottomNavigationView to null. So in wherever you set the layout write code as :
BottomNavigationView btmNav = findViewById(R.id.bottom_navigation);
btmNav.setItemIconTintList(null);
Let us know if this works for you.

try to add this line in the dimens.xml
<dimen name="design_bottom_navigation_active_text_size" tools:override="true">#dimen/design_bottom_navigation_text_size</dimen>

You can create custom style.
There are two steps.
1- Create custom bottom_navigation_bar_icon_color.xml in drawable folder. This is the selector showed the icon highlighted or default. So you can highlight all icons or show them as default. Choose one of the following when creating your bottom_navigation_bar_icon_color.xml
Icons highlighted: <item android:alpha="1.0" android:color="?attr/colorOnPrimary" android:state_checked="true"/>
Icons default: <item android:alpha="0.6" android:color="?attr/colorOnPrimary"/>
bottom_navigation_bar_icon_color.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:alpha="0.6" android:color="?attr/colorOnPrimary"/>
</selector>
2- Add following custom style to themes.xml or styles.xml. bottom_navigation_bar_icon_color used in itemIconTint and itemTextColor
<style name="BottomNavigationThemeCustom">
<item name="enforceTextAppearance">true</item>
<item name="enforceMaterialTheme">true</item>
<item name="android:background">?attr/colorPrimary</item>
<item name="itemIconTint">#drawable/bottom_navigation_bar_icon_color</item>
<item name="itemRippleColor">#color/mtrl_navigation_bar_colored_ripple_color</item>
<item name="itemTextAppearanceInactive">?attr/textAppearanceCaption</item>
<item name="itemTextAppearanceActive">?attr/textAppearanceCaption</item>
<item name="itemTextColor">#drawable/bottom_navigation_bar_icon_color</item>
</style>
3- Use your new style for bottomNavigationBar
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottomNavigation"
style="#style/BottomNavigationThemeCustom"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="visible"
app:labelVisibilityMode="unlabeled"
app:menu="#menu/bottom_menu" />
4- If you want to hide the bottomNavigationBar on Scroll add following attribute to bottomNavigationBar
app:layout_behavior="com.google.android.material.behavior.HideBottomViewOnScrollBehavior"

You consider create your own implementation of bottomNavigation?
When I implement the Google BottomNavigationView, I got a lot of issues, so I create a new one like this:
<LinearLayout android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_alignParentBottom="true">
<View android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#color/grayBottomNavigationDelimiter"/>
<RadioGroup android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorNavigationBar"
android:orientation="horizontal">
<android.support.v7.widget.AppCompatRadioButton
android:id="#+id/homeButton"
android:drawableTop="#drawable/ic_home_black_24dp"
android:text="#string/navigation_home_text"
style="#style/RadioButtonStyle"/>
...
So, can see this is easier than imagine, did you?

To add it through XML: For the attribute IconItemTint and ItemTextColor, simply use the same color that you've used for icons by default. In that case, the highlight color and default color will be the same. Will give you the required ripple effect on selecting but highlight wont be visible.
For my black color icon, I've used this:
app:itemIconTint="#color/black"
app:itemTextColor="#000000"
My entire bottom nav looks like this:
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottomNavigationView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?android:attr/windowBackground"
app:itemIconTint="#color/black"
app:itemTextColor="#000000"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:menu="#menu/bottom_nav_more_options_menu" />

How to set custom image icon in BottomNavigationView

As the title says, i am trying to add a custom image.png to my bottom Navigation bar but i can't find exactly how.
I tried:
Vector asset and image asset does not show my image.png
create a selector xml for my image and added it to my nav menu but it just shows a grey square instead of image
I think the solution must be simple but can't find anything related on this forum.
Thanks in advance.
Edit:
bottom_navigation.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/airplane"
android:icon="#drawable/vegetables"
android:title="Vegetable"
/>
</menu>
vegetables.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/veg" android:state_checked="false"/>
<item android:drawable="#drawable/veg1" android:state_checked="true" />
</selector>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".MainActivity">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="#id/bottom_navigation"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintLeft_toLeftOf="parent"/>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:menu="#menu/bottom_navigation"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
android:background="?android:attr/windowBackground"
app:layout_constraintRight_toRightOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

I recommend use a vector image.
Android by default in bottom navigation view component all SVG object displays in white color. The check symbol object is in the circle but his color is converted to white and so it has became invisible.
One solution is to redraw the SVG image. But sometimes it is not posible. The other solution is to tell the bottom navigation view to display original picture colors. You can do it in the activity code setting:
At create() just set:
bottomNavigationView.setItemIconTintList(null);

Update your icon in navigation.xml like below:
<item
android:id="#+id/navigation_more"
android:icon="#drawable/ic_navigation_more"
app:showAsAction="always|withText"
android:title="#string/title_more" />
Here example of ic_navigation_more.xml:
<vector
xmlns:android="http://schemas.android.com/apk/res/android"
android:width="24dp"
android:height="24dp"
android:viewportWidth="24.0"
android:viewportHeight="24.0">
<path
android:fillColor="#FF000000"
android:pathData="M3,18h18v-2L3,16v2zM3,13h18v-2L3,11v2zM3,6v2h18L21,6L3,6z"/>
</vector>

Create menu file for your bottom navigation
Set icon for every menu item that you have by android:icon="#drawable/your_drawable"
In xml file where you declared BottomNavigationView add app:menu="#menu/your_menu"

Try to use the Custom image with the navigation menu item id
For kotlin:
val navView: BottomNavigationView = findViewById(R.id.nav_view)
val BVMenu = navView.getMenu()
BVMenu.findItem(R.id.navigation_home).setIcon(R.drawable.ic_favorite_black_24dp);
For Java:
Menu navView = bottomNavigationView.getMenu();
navView.findItem(R.id.navigation_home).setIcon(R.drawable.ic_favorite_black_24dp);

Your image.png must have a transparent area, NavigationView will color it just like the notification icon on statusbar

android:icon="#drawable/your_drawable"
and to solve colour problem tint

I don't think that you can add a .png image as a navigation view unless you set the icon tint list "setItemIconTintList" to null.
in my case
//navView.setItemIconTintList(null)

In your xml file add the menu property to the BottomNavigationView tag:
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="50dp"
app:menu="#menu/menu_navigation_items" /> `
The #menu/menu_navigation_items is a menu with < item> tags. In each item tag add the icon property:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="#+id/id1"
android:enabled="true"
android:icon="#drawable/your_icon"
android:title="Your Title"
app:showAsAction="ifRoom" />
<item
android:id="#+id/id2"
android:enabled="true"
android:icon="#drawable/your_icon"
android:title="Your Title"
app:showAsAction="ifRoom" />
</menu>

How to change a specific icon image from Bottom Navigation View

I need to implement a Bottom Navigation View in my android app. The middle icon needs to be an image, the company logo. But when I run the app it appears only a grey filled rounded icon. The images above show what I want and what I'm getting.
What I want:
What I get:
I already tried others questions in this website, but every answer tells to change the iconTintList from XML with a drawable, but the center icon is a vector with more than one color.
When I tried to set null to setIconTintList method, works for the middle icon but the others icons change to original color too.
//This doesn't work to other icons, only for the middle one
mBottomNav.setItemIconTintList(null);
I also tried to get the menu and set the icon tint list only for the middle one, like the code above, but doesn't work too.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
mBottomNav.getMenu().findItem(R.id.nav_buy).setIconTintList(null);
}
This is the XML implementation:
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottomNavigationView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:background="#color/kmv_background"
app:itemIconTint="#drawable/bottom_nav_item_color"
app:itemTextColor="#drawable/bottom_nav_item_color"
app:labelVisibilityMode="labeled"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:menu="#menu/bottom_navigation" />
This is the java implementation:
mBottomNav = findViewById(R.id.bottomNavigationView);
mBottomNav.setOnNavigationItemSelectedListener(this);
Thanks for any help!

I don't think there's a short way. Use this first:
mBottomNav.setItemIconTintList(null);
Then do the designs yourself. Don't forget to separate the buttons as clicked and not clicked.
Example Home Button XML
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!--Clicked-->
<item android:drawable="#drawable/homeclicked" android:state_checked="true" />
<!--Not Clicked-->
<item android:drawable="#drawable/homenotclicked" android:state_checked="false" />
</selector>
And add them to the view:
Example bottom_navigation.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/homebuttons"
android:icon="#drawable/homebuttonxml />
<!--Other Buttons...-->
</menu>
And finally, Link view to bottomnavigationview
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottomNavigationView"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:labelVisibilityMode="unlabeled"
app:elevation="0dp"
app:menu="#menu/bottom_navigation">
</com.google.android.material.bottomnavigation.BottomNavigationView>

For a particlar icon, this can be used:
MenuItemCompat.setIconTintMode(binding.bottomNav.menu.getItem(3), null);

Bottom Navigation Icons are Cropped Android

I'm assembling an app with a Botton navigation bar in Android with Android Studio. With two icons it looked fine, but when I added four, the icons look cropped. I can't find any other error like this. Any suggestions are welcomed.
Cropped icons bottom nav 4 options
Here is the code for the Bottom Navigation (bottom_navigation.xml)
<?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="#+id/action_lines"
android:enabled="true"
android:icon="#drawable/ic_lines_off"
android:title="Lines"
android:background="#android:color/transparent"
app:showAsAction="ifRoom" />
<item
android:id="#+id/action_contacts"
android:enabled="true"
android:icon="#drawable/ic_contacts_off"
android:title="Contacts"
android:background="#android:color/transparent"
app:showAsAction="ifRoom" />
<item
android:id="#+id/action_conversations"
android:enabled="true"
android:icon="#drawable/ic_conversations_off"
android:title="Conversations"
android:background="#android:color/transparent"
app:showAsAction="ifRoom" />
<item
android:id="#+id/action_settings"
android:enabled="true"
android:icon="#drawable/ic_settings_off"
android:title="Settings"
android:background="#android:color/transparent"
app:showAsAction="ifRoom" />
</menu>
In my activity.xml I call the bottom menu like this:
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottomNavigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:itemIconTint="#drawable/bnv_tab_item_foreground"
app:itemTextColor="#drawable/bnv_tab_item_foreground"
app:menu="#menu/bottom_navigation" />
Question Update:
I tried changing
app:showAsAction="ifRoom"
for
app:showAsAction="always"
And it doesn't solve the problem. There is no change to the issue. And it does not show the tag in every icon as it should. Only on the selected one.
One way of solving it is adding a Theme to the bottom navigation call in activity, like this:
android:theme="?attr/toolbarNavigationButtonStyle"
I have no clue why it works, but it solves the issue apparently in lots of devices exept in Samsung Galaxy Note 8
Here is "bnv_tab_item_foreground"
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true" android:color="#color/colorAccent" />
<item android:color="#android:color/darker_gray" />
</selector>

Try changing a value for the property below:-
app:showAsAction="always"
and if still, your problem persists, please provide the file
"bnv_tab_item_foreground"

Use Support Library 28. Then, just add app:labelVisibilityMode="labeled" to your BottomNavigationView XML declaration.
Hope this helps

I believe this is being caused by your layout not fitting into the System window, and you can easily fix this by going to the Layout you have the Bottom Navigation and at the root layout add android:fitsSystemWindows="true" just like I did below
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<!--things come here -->
</RelativeLayout>

Custom tab indicator view

I want to reproduce this tab indicator structure (screen is from nova launcher): a dropdown menu and an arrow in the right bottom corner.
I have no problem about code but i can't reproduce this appearance.
I tried this:
mBar.addTab(mBar.newTab().setText(ctx.getString(R.string.tab_actions)).setTabListener(this).setCustomView(R.layout.navigation_spinner));
where mBar is sherlock support actionBar.
This is my layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_width="match_parent"
android:layout_height="match_parent" android:layout_margin="-10dp"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical">
<Button android:id="#+id/button1" android:layout_width="match_parent"
android:layout_height="match_parent" android:text="Button" />
</LinearLayout>
and this is my result:
The problem is that the button in the central tab doesn't fill the tab indicator. How can i set a custom view that perfectly fill the indicator without margin or padding? Or i have to approach this in a different way to have the a result like the firs screen? Thanks in advice

What you are trying to do is really complicated, and will be hard to achieve.
If you want drop down menus you can try those :
menu/options.xml:
<item
android:icon="#drawable/ic_menu_sort"
android:showAsAction="ifRoom">
<menu>
<item
android:id="#+id/menuSortNewest"
android:title="Sort by newest" />
<item
android:id="#+id/menuSortRating"
android:title="Sort by rating" />
</menu>
</item>
Second option:
menu/options.xml:
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/menuSort"
android:showAsAction="ifRoom"
android:actionLayout="#layout/action_sort" />
</menu>
layout/action_sort.xml:
<Spinner xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/ic_menu_refresh"
android:entries="#array/order" />
Docs for menu resources - http://developer.android.com/guide/topics/resources/menu-resource.html