title: BottomNavigationBar-change the tab icon color
body: <p>I've integrated Bottom Bar Navigation bar on my app. But when I swipe, tab's color doesn't change. It's weird cause I have selector file. Any idea to solve this problem? </p>
  
  <p><strong>Activity.java</strong></p>
  
  <pre><code>BottomNavigationView bottomNavigationView = (BottomNavigationView)
              findViewById(R.id.bottom_navigation);
  
  
      bottomNavigationView.setOnNavigationItemSelectedListener(
              new BottomNavigationView.OnNavigationItemSelectedListener() {
                  @Override
                  public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                      switch (item.getItemId()) {
                          case R.id.bb_menu_arac:
                              fragment = new AraclarimFragment();
                              break;
                          case R.id.bb_menu_yaklasan:
                              fragment = new YaklasanlarFragment();
                              break;
                          case R.id.bb_menu_yakin:
                              fragment = new Yakinimdakiler();
                              break;
  
                      }
                      final FragmentTransaction transaction = fragmentManager.beginTransaction();
                      transaction.replace(R.id.main_container, fragment).commit();
                      return true;
                  }
  
  
              });
  </code></pre>
  
  <p><strong>selector.xml</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;selector xmlns:android="http://schemas.android.com/apk/res/android"&gt;
  &lt;item android:color="@color/beyaz" android:state_enabled="true" /&gt;
  &lt;item android:color="@color/colorPrimaryDark" android:state_enabled="false" /&gt;
  &lt;/selector&gt;
  </code></pre>
  
  <p><strong>activiy.xml</strong></p>
  
  <pre><code>&lt;android.support.design.widget.BottomNavigationView
      android:id="@+id/bottom_navigation"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_gravity="bottom|end"
      app:itemBackground="@color/colorPrimary"
      app:itemIconTint="@color/beyaz"
      app:itemTextColor="@color/beyaz"
      app:menu="@menu/bottombar_menu" /&gt;
  </code></pre>