Android: Bottom Navigation View - change icon of selected item

Question

I have added BottomNavigationView in my application like.

main.xml

<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/colorPrimary"         app:itemIconTint="@color/white"         app:itemTextColor="@color/white"         app:menu="@menu/bottom_navigation_main" /> 

bottom_navigation_main.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_favorites"         android:enabled="true"         android:icon="@drawable/ic_favorite_white_24dp"         android:title="@string/text_favorites"         app:showAsAction="ifRoom" />     <item         android:id="@+id/action_schedules"         android:enabled="true"         android:icon="@drawable/ic_access_time_white_24dp"         android:title="@string/text_schedules"         app:showAsAction="ifRoom" />     <item         android:id="@+id/action_music"         android:enabled="true"         android:icon="@drawable/ic_audiotrack_white_24dp"         android:title="@string/text_music"         app:showAsAction="ifRoom" /> </menu> 

MainActivity click

bottomNavigationView.setOnNavigationItemSelectedListener(         new BottomNavigationView.OnNavigationItemSelectedListener() {             @Override             public boolean onNavigationItemSelected(@NonNull MenuItem item) {                 switch (item.getItemId()) {                     case R.id.action_favorites:                         //need change icon of favotites here.                     case R.id.action_schedules:                      case R.id.action_music:                  }                 return true;             }         }); 

I want to change the icon of the bottom navigation of selected position. How can we achieve this feature when user click one item?

(if user clicked one item then the icon change to another one)

Answer 1

You can simply create drawable selector in drawable folder and image can be change according to the state of the widget used in view

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android">     <item android:drawable="@drawable/calender_green" android:state_checked="true"/>     <item android:drawable="@drawable/calender_black" android:state_checked="false"/> </selector>