bottomnavigationview

R.id.icon is already defined in Android API level 1. However, I am getting an NPE in a Android Design Support Library internal code while accessing an imageview inflated using R.id.icon . NOTE: I am not targetting Oreo as my targetSdk is currently 25 . Here is the stacktrace: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.ViewGroup$LayoutParams android.widget.ImageView.getLayoutParams()' on a null object reference at android.support.design.internal.BottomNavigationItemView.setChecked(BottomNavigationItemView.java:172) at android.support.design

I want to add facebook messenger like oversized button in the middle of my bottombar layout but confused how to add.. Facebook Messenger I was using ahbottomnavigation library for making my bottombar. I just tried to make it simple, not professional type. Look here: BottomSheetLayout file - tv.xml : <?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item android:bottom="2dp" android:left="2dp" android:right="2dp" android:top="15dp"> <shape android:shape="rectangle"> <solid android:color="@color/colorPrimary" /> </shape> </item> <item

I am using the Bottomnavigationview for tab-bar in my application, for it, i am using the following code.Please check it once. 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:itemTextColor="@android:color/black" app:menu="@menu/bottom_navigation_main" /> And I get the following Result from it, please check the image for it. But the problem is that , I need the custom item of the Bottomnavigationview , like in below image there is

The following is my layout xml. The problem now is that the BottomNavigationView is overlapping the FrameLayout. I wanted the FrameLayout to stretch to the top of the BottomNavigationView. I tried with trick such as adding paddingBottom in the FrameLayout but I wonder if there is other better solution. Thanks. <?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.CoordinatorLayout 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:id="@+id/container" android:layout

I am using a BottomNavigationBar together with a TabController. By clicking on the different Tabs of the BottomNavigationBar the TabView is changing the content. However if I swipe on the TabView to switch to another view/tab the BottomNavigationBar is not updating to the tab I swiped to. I already have added a listener to the TabController to detect changes. But how can I update BottomNavigationBar programmatically to reflect the change? I think it is way more elegant to use PageView instead of TabBarView specially in your case. class BottomBarExample extends StatefulWidget { @override