Develop Reference

TabLayout visual bug: gray transparent strips on both sides

There are two transparent vertical strips on both sides of my TabLayout. It looks like this:
It appeared after I removed android:theme="#style/AppTheme.ActionBar" from TabLayout, because it didn't show TabLayout indicator:
What might be the issue?
My layout:
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="my.beeline.kz.ui.ScrollableController">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#null"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:theme="#style/AppTheme.ActionBar"
app:layout_collapseMode="none"
app:layout_scrollFlags="scroll|enterAlways|snap"
app:titleMarginStart="#dimen/toolbar_title_margin"/>
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#null"
app:tabMinWidth="120dp"
app:tabSelectedTextColor="#color/black"
app:tabTextAppearance="#android:style/TextAppearance.Widget.TabWidget"
app:tabTextColor="#color/gray_solid"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/gray_very_light"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
Update:
Solution was to remove android:background="#null" from AppBarLayout

This code worked for me I hope it worked for you :
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMode="fixed"
app:tabGravity="fill"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>

Here I'm going to show you how to implement material design tabs in your android app.
1. Open build.gradle of app level and add design support library because TabLayout is a part of Android Design Support Library:
compile 'com.android.support:design:27.0.2'
2. Add Tab layout and View pager in you layout activity_main.xml or wherever you willing to add
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include layout="#layout/app_bar" />
<android.support.design.widget.TabLayout
android:id="#+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?actionBarSize"
app:tabGravity="fill"
app:tabIndicatorColor="#color/white"
app:tabIndicatorHeight="4dp"
app:tabBackground="#color/colorPrimary"
app:tabMode="fixed">
</android.support.design.widget.TabLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v4.view.ViewPager>
</LinearLayout>
3. app_bar.xml for toolbar
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/colorPrimary"
android:gravity="center_vertical"
app:layout_collapseMode="pin"
app:layout_scrollFlags="scroll|enterAlways"
app:theme="#style/MyToolbarTheme"
app:title="#string/app_name"/>
4. style.xml
<style name="MyToolbarTheme"
parent="#style/ThemeOverlay.AppCompat.Dark">
<item name="colorControlNormal">#color/white</item>
<item name="titleTextColor">#color/white</item>
</style>
Some options to customize tabs appearance:
app:tabGravity=”fill” for Navigation tab gravity. Other is the centre for placing navigation tabs from centre
app:tabIndicatorColor=”#color/white” for an indicator in tabs. Here you can see the white indicator.
app:tabIndicatorHeight=”4dp” for indicator height.
app:tabMode=”fixed” for tab mode. Other is scrollable for many more tabs.
app:tabTextColor=”#color/semi_yellow” for unselected tab text color.
app:tabSelectedTextColor=”#color/yellow” for selected tab text color.
If you want to add icons to tab, you have to do is call setIcon() method of the tab. Create icon array and assign each one for each tab like this:
Tabs with the icon:
private int[] tabIcons = {
R.drawable.home,
R.drawable.notification,
R.drawable.star
};
tabLayout.getTabAt(0).setIcon(tabIcons[0]);
tabLayout.getTabAt(1).setIcon(tabIcons[1]);
tabLayout.getTabAt(2).setIcon(tabIcons[2]);
And the time of Result:
Without icon
Happy Coding!!!

Bottom navigation bar overlapping viewpager in CoordinatorLayout Android

I have a recycler view in viewpager but the last row of recycler view is not fully visible (ie partially visible) as the Bottom navigation view is overlapping the viewpager. How can I fix this issue?
activity_main.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:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.booksummary.booksummaryvideos.MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="#+id/my_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#fff"
android:elevation="4dp"
android:gravity="start"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="?android:attr/windowBackground"
android:elevation="16dp"
app:itemIconTint="#drawable/selector"
app:itemTextColor="#drawable/selector"
app:menu="#menu/navigation" />
<!--android:background="?android:attr/windowBackground"-->
</android.support.design.widget.CoordinatorLayout>

The problem is that the BottomNavigationViewis in fact overlapping yourViewPager...
You can either change your layout so that the ViewPager ends above the BottomNavigationView
or
You need to set bottom padding to the size of the BottomNavigationView on the RecyclerView and also (to ensure the padding is after the last item) clipToPadding="false"

Drawable Panel above toolbars

I have an activity containing - Toolbar, Tabs, ViewPager, FloatingActionButton and DraggablePanel.
When my initialize my draggable panel, it appears below the Toolbar, FloatingButton and Tabs. Setting DraggablePanel.bringToFront() brings it only above ViewPager. How do I bring my DraggablePanel above everything when initialized?
Layout File:
<?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"
xmlns:draggable_panel="http://schemas.android.com/apk/res-auto"
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="in.brewtv.activities.HomeActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/appbar_padding_top"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="30dp"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay">
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="false"
app:tabGravity="fill"
app:tabMode="fixed" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
app:srcCompat="#drawable/change_mood" />
<!-- DraggablePanel -->
<com.github.pedrovgs.DraggablePanel
android:id="#+id/draggable_panel"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
draggable_panel:x_scale_factor="2.3"
draggable_panel:y_scale_factor="2.3"
draggable_panel:top_fragment_height="200dp"
draggable_panel:top_fragment_margin_right="10dp"
draggable_panel:top_fragment_margin_bottom="10dp"
draggable_panel:enable_horizontal_alpha_effect="true"/>
</android.support.design.widget.CoordinatorLayout>
Screen shots:

Try to set an elevation, higher value than your FAB to your DraggablePanel
<com.github.pedrovgs.DraggablePanel
android:id="#+id/draggable_panel"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:elevation="10dp"
draggable_panel:x_scale_factor="2.3"
draggable_panel:y_scale_factor="2.3"
draggable_panel:top_fragment_height="200dp"
draggable_panel:top_fragment_margin_right="10dp"
draggable_panel:top_fragment_margin_bottom="10dp"
draggable_panel:enable_horizontal_alpha_effect="true"/>

The content is hiding below the tab layout

The content inside my view pager hides below the tab layout.
I am adding a recycler view in the fragments in view pager and the recycler view starts below the action bar bar but under the tab layout.
<?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"
tools:context="app.com.thetechnocafe.codelabsmaterialdesign.MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light">
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.design.widget.TabLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
</android.support.v4.view.ViewPager>
</RelativeLayout>

Try adding android:layout_below="#+id/appbar" to your viewpager

Try adding app:layout_behavior="#string/appbar_scrolling_view_behavior" to viewpager

Recyclerview + viewpager, make toolbar collapse

I have a recyclerview inside a viewpager. I also have Tabs above that and a toolbar. I'd like to collapse those (or one of those I have to try it out) when I move the recyclerView down. Basically the same as here.
I'm having trouble to get this to work.
Here is what I have:
<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.cedric.testdesign.MainActivity">
<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.TabLayout
android:id="#+id/tabs"
style="#style/MyCustomTabLayout"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"/>
</android.support.design.widget.AppBarLayout>
<com.signpetitions.cedric.signpetitions.components.MyFab
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
android:src="#android:drawable/ic_dialog_email" />
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
Inside the viewPager I have a fragment with a recycler view:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.RecyclerView
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/recyclerView"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />

I added this to the toolbar :
app:layout_scrollFlags="scroll|enterAlways"
Then it works. The issue though is that when the statusbar is transparent the text behind the toolbar is visible. So the statusbar has to have a color.