cannot resolve R when applying BottomNavigationView bottombar - android

when I add bottomNavigationView, I got cannot resolve R , but when I remove the bottomNavigationView the error disappear, so why I am getting such error ?
the below code result to unresolved R
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.learn2crack.recyclerviewgrid.MainActivity">
<android.support.v7.widget.RecyclerView
android:id="#+id/card_recycler_view"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_alignParentBottom="true"
android:background="#android:color/holo_blue_light"
app:menu="#menu/my_navigation_items" />
</android.support.design.widget.CoordinatorLayout>
when remove it as the below the error disappear
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.learn2crack.recyclerviewgrid.MainActivity">
<android.support.v7.widget.RecyclerView
android:id="#+id/card_recycler_view"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.design.widget.CoordinatorLayout>


If your XML's contain errors your generated file might not build try erasing most of their content and making sure id's are not duplicated.
Check if you have imported the right lib to work with BottomNavigation and none of your props are null.
Here is my Activity code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="MainActivity">
<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:itemIconTint="#drawable/bottom_menu_selector"
app:itemTextColor="#drawable/bottom_menu_selector"
app:menu="#menu/bottom_navigation_menu" />
<ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/bottom_navigation"/>

Related

How can I prevent the truncation of a listview by the layout header?

I cannot see the first row of my listview. I am assuming the screen page's header is overlapping with the listview.
My fragment file is follows:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
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android:layout_height="match_parent"
android:orientation="vertical"
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Any advice tips will be very helpful.
Edit: I am including my activity file below.
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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"
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android:orientation="vertical"
tools:context=".views.activities.ColorActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<fragment
android:id="#+id/color_fragment"
android:name="com.microsoft.skype.teams.views.fragments.ColorFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</android.support.constraint.ConstraintLayout>
As a hack I am currently adding an extra row of data. Adding the extra row of data is clearly something I wish to avoid.

The issue is your toolbar is taking the height of your first row. To get out of this do something like this:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="?attr/layout_background_color">
<LinearLayout
android:id="#+id/colors_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="?attr/actionBarSize" // added this line now your
android:orientation="vertical" listview will start below
android:visibility="visible"> toolbar
<ListView
android:id="#+id/colors_list"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>

Android adding fragment to end of layout

I am trying to add a Fragment to my MainActivity, and it works but I want to add it to the end of the layout. The reason I want to do this is because in my layout I have included 5 fragments and I don't want to generate them all. I think it has to be done in the onAttach() method of the Fragment class but I don't have a clue how to do it. Any help is welcome.
This is my layout:
<?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/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="ch.testhomespeed.lazar.test.MainActivity">
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<LinearLayout 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/content_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="ch.testhomespeed.lazar.test.MainActivity"
tools:showIn="#layout/activity_main">
<include layout="#layout/fragment_header" />
<include layout="#layout/fragment_first_apartment" />
<include layout="#layout/fragment_second_apartment" />
<include layout="#layout/fragment_third_apartment" />
<include layout="#layout/fragment_fourth_apartment" />
</LinearLayout>
</ScrollView>
</android.support.design.widget.CoordinatorLayout>

Android element is hidden under bottom dock

So I just created a new basic activity:
activity_chat.xml
<?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:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.example.nika.chatapp.Chat">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_chat" />
</android.support.design.widget.CoordinatorLayout>
content_chat is a layout inside coordinator layout which has
height="match_parent" and I have an element at the bottom of it and it's
hidden beneath bottom deck.
Is there a way to solve this problem ?
content_chat.xml
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="com.example.nika.chatapp.Chat"
tools:showIn="#layout/activity_chat">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_alignParentBottom="true">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</RelativeLayout>

Remove app:layout_behavior="#string/appbar_scrolling_view_behavior" from the RelativeLayout in content_chat.xml
Also as another commenter noted, you will want to add a top-margin to your RelativeLayout via android:layout_marginTop="?attr/actionBarSize", so it plays nicely with the AppBarLayout

I want the ViewPager to be in full screen - Android Studio

I have some issues with the ViewPager I am using. I want it to be in full screen, but for some reason there are some edges that won't disappear. How can I solve this?
Code from the XML-file
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context=".Main.MainActivity"
tools:showIn="#layout/activity_main">
<android.support.v4.view.ViewPager
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/viewPager"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>

You can try this:
android:layout_width="fill_parent"
android:layout_height="wrap_content"

Try to remove paddings from all four sides. By default when you create the activity using AS, AS will add padding to your main view. Below is the layout without external padding.
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context=".Main.MainActivity"
tools:showIn="#layout/activity_main">
<android.support.v4.view.ViewPager
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/viewPager"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>

You can try as like following way
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context=".Main.MainActivity"
tools:showIn="#layout/activity_main">
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/viewPager"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />

remove all of android:padding from RelativeLayout
and remove android:layout_centerVertical and android:layout_centerHorizontal
from ViewPager

How to fix No resource identifier found for attribute '---' in android

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android:layout_height="match_parent"
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