Develop Reference

BottomNavigationView - Android Studio

I have used images as icon but I dont want them to look grey when they are not selected. It should look same as picture whether its active or not. What should I do?
com.google.android.material.bottomnavigation.BottomNavigationView
Thanks

Try using this in your XML file in the BottomNavigationView part
app:itemIconTint="null"
Or add this to your java file after defining your BottomNavigationView (with the findViewById)
//Replace BottomNavView with your nav bar id
BottomNavView.setItemIconTintList(null);

A long way to achieve it
mBottomNav.setItemIconTintList(null);
Then do the designs yourself. Don't forget to separate the buttons as clicked and not clicked.
Example 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>

The default color used by not selected items is based on the colorOnSurface color.
Just use:
<com.google.android.material.bottomnavigation.BottomNavigationView
android:theme="#style/BottomNavigationViewThemeOverlay"
.... />
with:
<style name="BottomNavigationViewThemeOverlay">
<item name="colorOnSurface">#color/...</item>
</style>
Otherwise you can define your custom selector:
<com.google.android.material.bottomnavigation.BottomNavigationView
app:itemIconTint="#color/bottomnavicontint"
../>
with:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:alpha="1.0" android:color="?attr/colorPrimary" android:state_checked="true"/>
<item android:alpha="0.6" android:color="#color/..."/>. <!-- not selected -->
</selector>

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 remove NavigationView item background

This seems like it should be trivial with the itemBackground attribute, but for some reason, it isn't working.
As shown below, I can successfully add my own background (in blue), but the original ripple (grey rectangle) is still visible.
Setting itemBackground to null doesn't seem to do the trick either.
My navigation view:
<com.google.android.material.navigation.NavigationView
android:id="#+id/nav_view"
style="#style/Widget.MaterialComponents.NavigationView"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_main"
app:itemBackground="#drawable/nav_item_background"
app:menu="#menu/main_drawer" />
(Basically untouched style wise from the generated view)
My ripple:
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="#color/accent_ripple">
<item
android:id="#android:id/mask"
android:right="8dp">
<shape android:shape="rectangle">
<corners
android:bottomRightRadius="50dp"
android:topRightRadius="50dp" />
<solid android:color="#fff" />
</shape>
</item>
</ripple>
My app theme also extends Theme.MaterialComponents, so I'm out of ideas.

If you want a custom shape in your Item Background don't use the app:itemBackground attribute.
Use the app:itemShapeAppearanceOverlay and the app:itemShapeFillColor attributes:
<com.google.android.material.navigation.NavigationView
app:itemShapeAppearanceOverlay="#style/ShapeAppearanceOverlay.Item"
app:itemShapeFillColor="#color/nav_item_shape_fill"
android:theme="#style/ThemeOverlay.NavigationView"
../>
where:
<style name="ShapeAppearanceOverlay.Item" parent="">
<item name="cornerFamily">rounded</item>
<item name="cornerSizeTopRight">16dp</item>
<item name="cornerSizeBottomRight">16dp</item>
<item name="cornerSizeBottomLeft">0dp</item>
<item name="cornerSizeTopLeft">0dp</item>
</style>
and the color selector is something like:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:alpha="0.12" android:color="?attr/colorPrimary" android:state_activated="true"/>
<item android:alpha="0.12" android:color="?attr/colorPrimary" android:state_checked="true"/>
<item android:color="#android:color/transparent"/>
</selector>
Currently there isn't a method to remove the ripple outside the shape in the item.
However you can use the android:theme to override the color used by the ripple.
<style name="ThemeOverlay.NavItem.Ripple" parent="">
<item name="android:colorControlHighlight">#android:color/transparent</item>
</style>
Check this issue for updates.

just you can do like this :
<com.google.android.material.navigation.NavigationView
android:id="#+id/navigationView"
android:layout_width="230dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#color/colorPrimaryDark">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include layout="#layout/layout_navigation_header" />
<include layout="#layout/layout_navigation" />
</LinearLayout>
</com.google.android.material.navigation.NavigationView>

Why don't you override it with your own drawable? You can use your own color and effect or even make the ripple effect transparent with hex
#ffffffff
or
#android:color/transparent

Selected tab's color in Bottom Navigation View

I'm adding a BottomNavigationView to a project, and I would like to have a different text (and icon tint) color for the selected tab (to achieve greying out non-selected tabs effect). Using a different color with android:state_selected="true" in a color selector resource file doesn't seem to work. I also tried having additional item entries with android:state_focused="true" or android:state_enabled="true", no effect unfortunately. Also tried setting the state_selected attribute to false (explicitly) for the default (non-selected) color, with no luck.
Here is how I add the view to my layout:
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
app:itemBackground="#color/silver"
app:itemIconTint="#color/bnv_tab_item_foreground"
app:itemTextColor="#color/bnv_tab_item_foreground"
app:menu="#menu/bottom_nav_bar_menu" />
Here is my color selector (bnv_tab_item_foreground.xml):
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:color="#android:color/darker_gray" />
<item android:state_selected="true" android:color="#android:color/holo_blue_dark" />
</selector>
And my menu resource (bottom_nav_bar_menu.xml):
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/action_home"
android:icon="#drawable/ic_local_taxi_black_24dp"
android:title="#string/home" />
<item
android:id="#+id/action_rides"
android:icon="#drawable/ic_local_airport_black_24dp"
android:title="#string/rides"/>
<item
android:id="#+id/action_cafes"
android:icon="#drawable/ic_local_cafe_black_24dp"
android:title="#string/cafes"/>
<item
android:id="#+id/action_hotels"
android:icon="#drawable/ic_local_hotel_black_24dp"
android:title="#string/hotels"/>
</menu>
I would appreciate any help.

While making a selector, always keep the default state at the end, otherwise only default state would be used. You need to reorder the items in your selector as:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true" android:color="#android:color/holo_blue_dark" />
<item android:color="#android:color/darker_gray" />
</selector>
And the state to be used with BottomNavigationBar is state_checked not state_selected.

1. Inside res create folder with name color (like drawable)
2. Right click on color folder. Select
new-> color resource file-> create color.xml file (bnv_tab_item_foreground)
(Figure 1: File Structure)
3. Copy and paste bnv_tab_item_foreground
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="0dp"
android:layout_marginStart="0dp"
app:itemBackground="#color/appcolor"//diffrent color
app:itemIconTint="#color/bnv_tab_item_foreground" //inside folder 2 diff colors
app:itemTextColor="#color/bnv_tab_item_foreground"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="#menu/navigation" />
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/white" />
<item android:color="#android:color/darker_gray" />
</selector>
Figure 1: File Structure:

BottomNavigationView uses colorPrimary from the theme applied for the selected tab and it uses android:textColorSecondary for the inactive tab icon tint.
So you can create a style with the prefered primary color and set it as a theme to your BottomNavigationView in an xml layout file.
styles.xml:
<style name="BottomNavigationTheme" parent="Theme.AppCompat.Light">
<item name="colorPrimary">#color/active_tab_color</item>
<item name="android:textColorSecondary">#color/inactive_tab_color</item>
</style>
your_layout.xml:
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?android:attr/windowBackground"
android:theme="#style/BottomNavigationTheme"
app:menu="#menu/navigation" />

If you want to change icon and text colors programmatically:
ColorStateList iconColorStates = new ColorStateList(
new int[][]{
new int[]{-android.R.attr.state_checked},
new int[]{android.R.attr.state_checked}
},
new int[]{
Color.parseColor("#123456"),
Color.parseColor("#654321")
});
navigation.setItemIconTintList(iconColorStates);
navigation.setItemTextColor(iconColorStates);

I am using a com.google.android.material.bottomnavigation.BottomNavigationView (not the same as OP's) and I tried a variety of the suggested solutions above, but the only thing that worked was setting app:itemBackground and app:itemIconTint to my selector color worked for me.
<com.google.android.material.bottomnavigation.BottomNavigationView
style="#style/BottomNavigationView"
android:foreground="?attr/selectableItemBackground"
android:theme="#style/BottomNavigationView"
app:itemBackground="#color/tab_color"
app:itemIconTint="#color/tab_color"
app:itemTextColor="#color/bottom_navigation_text_color"
app:labelVisibilityMode="labeled"
app:menu="#menu/bottom_navigation" />
My color/tab_color.xml uses android:state_checked
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:color="#color/grassSelected" android:state_checked="true" />
<item android:color="#color/grassBackground" />
</selector>
and I am also using a selected state color for color/bottom_navigation_text_color.xml
Not totally relevant here but for full transparency, my BottomNavigationView style is as follows:
<style name="BottomNavigationView" parent="Widget.Design.BottomNavigationView">
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">#dimen/bottom_navigation_height</item>
<item name="android:layout_gravity">bottom</item>
<item name="android:textSize">#dimen/bottom_navigation_text_size</item>
</style>

It's too late to answer but might be helpful for someone.
I was doing a very silly mistake, I was using a selector file named as bottom_color_nav.xml for Select and unselect color change but still it was not reflecting any color change in BottomNavigationView.
Then I realize, I was returning false in onNavigationItemSelected method. It will work fine if you'll return true in this method.

In order to set textColor, BottomNavigationView has two style properties you can set directly from the xml:
itemTextAppearanceActive
itemTextAppearanceInactive
In your layout.xml file:
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bnvMainNavigation"
style="#style/NavigationView"/>
In your styles.xml file:
<style name="NavigationView" parent="Widget.MaterialComponents.BottomNavigationView">
<item name="itemTextAppearanceActive">#style/ActiveText</item>
<item name="itemTextAppearanceInactive">#style/InactiveText</item>
</style>
<style name="ActiveText">
<item name="android:textColor">#color/colorPrimary</item>
</style>
<style name="InactiveText">
<item name="android:textColor">#color/colorBaseBlack</item>
</style>

Try using android:state_enabled rather than android:state_selected for the selector item attributes.

This will work:
setItemBackgroundResource(android.R.color.holo_red_light)

Instead of creating selector,
Best way to create a style.
<style name="AppTheme.BottomBar">
<item name="colorPrimary">#color/colorAccent</item>
</style>
and to change the text size, selected or non selected.
<dimen name="design_bottom_navigation_text_size" tools:override="true">11sp</dimen>
<dimen name="design_bottom_navigation_active_text_size" tools:override="true">12sp</dimen>
Enjoy Android!

As the folder structure has changed, the tab_color.xml belongs to res > drawable now which can handle selectors. From there on the accepted solution works.

Android menu item define style for enabled/disabled status

Is it possible to define different style for menu item depending on its enabled/disabled status?
For example, I want the text color of menu item to be gray in disabled mode and white in enabled mode.
I didn't have success with changing color dinamycally just as many people didn't on stackoverflow.

It really depends on the item you wish to customize.
Basically you can create a custom color that changes depending on its state:
colors/custom_color.xml:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:color="#FF0000" android:state_enabled="false" />
<item android:color="#CCCCCC"/>
</selector>
Then set it to your menu item like this:
menu.findItem(R.id.action_search).getActionView().
setBackgroundResource(R.colors/custom_color.xml);
Or perhaps in the xml if available:
android:textColor="#color/custom_color"

You can use a drawable as the text colour, and in drawable you can use selector to select the colour according to enabled status. Using following drawable definition as colour will make your disabled menu items grey and the rest black.
In e.g. res/drawable/default_text_colour.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="false" android:color="#android:color/darker_gray"/>
<item android:color="#android:color/white"/>
</selector>
Then, using the drawable:
<item name="android:textColor">#drawable/default_text_colour</item>

For some one else may be needed: use ToolBar instead of ActionBar, add TextView and set style as MenuItem:
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar_explorer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?attr/actionBarSize"
android:theme="#style/CustomActionBar.Theme"
android:background="#mipmap/bg_naviber">
<TextView
android:id="#+id/toolbar_title"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="#string/title_activity_explorer2"
android:layout_gravity="start"
android:padding="#dimen/dimen_8"
style="#style/CustomActionBar.Tittle"
/>
<TextView
android:id="#+id/toolbar_delete"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="end"
android:text="#string/action_delete"
android:textColor="#drawable/selector_text_view"
android:padding="#dimen/dimen_16"
style="#style/CustomActionBar.Menu"
/>
<TextView
android:id="#+id/toolbar_do_delete"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="end"
android:text="#string/action_do_delete"
android:textColor="#drawable/selector_text_view"
android:padding="#dimen/dimen_16"
style="#style/CustomActionBar.Menu"
android:visibility="gone"
/>
</android.support.v7.widget.Toolbar>
set textColor by selector:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android"
>
<!-- order is important -->
<item android:state_enabled="false" android:color="#color/white_disabled"/>
<item android:state_pressed="true" android:color="#color/white"/>
<item android:color="#color/white"/>
</selector>

Using:
<style name="Theme.WordsTrainer" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
I've added the line:
<item name="android:textColor">?android:attr/textColorPrimary</item>
to themes.xml and night\themes.xml, and this works fine with day and nigth mode both.
I've spend a day diggin it, and finally found the answer in obvious place:
https://developer.android.com/guide/topics/ui/look-and-feel/darktheme