Develop Reference

How can I create a fragment with top corners rounded with radius of 8dp in Android?

I have a fragment with collapsible Toolbar layout. I open it as a bottomsheet by applying BottomSheetBehavior to this fragment in frame layout. I want to have rounded top corners for this fragment with 8dp corder radius. How can I achieve it? Thanks.
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">
<FrameLayout
android:id="#+id/frame_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
android:background="#drawable/rounded_corner">
<LinearLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.appcompat.widget.Toolbar
style="#style/ToolbarStyle"
android:layout_width="match_parent"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light">
<ImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="#drawable/image"/>
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
</LinearLayout>
</FrameLayout>
</layout>
The code for rounded corners drawable:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="#android:color/white"/>
<corners android:topLeftRadius="8dp"
android:topRightRadius="8dp"/>
</shape>

Change the parent layout from frame layout to card view and add
app:cardCornerRadius="8dp"

android -constraintLayout how to add elevation to sticky toolbar?

I have created a constraintLayout but the toolbar i am using does not have shadow elevation. i dont see any shadow. here is an image of what i have so far:
i want the green part to be elevated and a bit of a shadow. you know the material header way. so when i scroll the recyclerview it looks lke its oging under the header. pretty standard nowadays.
here is my code so far:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.constraintlayout.widget.Guideline
android:id="#+id/gl_start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_begin="76dp" />
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:contentInsetEnd="0dp"
app:contentInsetLeft="0dp"
app:contentInsetRight="0dp"
app:contentInsetStart="0dp"
app:elevation="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintBottom_toTopOf="#id/gl_start"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary">
<ImageView
android:id="#+id/iv"
android:layout_width="80dp"
android:layout_height="80dp"
android:src="#android:drawable/btn_star"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.appcompat.widget.Toolbar>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rv"
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#android:color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#id/gl_start"
tools:itemCount="10"
tools:listitem="#layout/list_item" />
note that the tool bar is meant to be sticky so it should not move, but ti just need it elevated, i tried setting elevation in xml on the toolbar but as you can see its not that pretty. how to put shadow and elevation ?

Either wrap you Toolbar inside AppBarLayout
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/app_bar_layout"
...>
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
.../>
</com.google.android.material.appbar.AppBarLayout>
Or use android:elevation with Toolbar, which require min API Level 21
android:elevation="10dp"

try like below -
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:orientation="vertical">
<android.support.v7.widget.Toolbar android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/shadow"
android:titleTextAppearance="#color/White"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
<FrameLayout android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- your components -->
<View android:layout_width="match_parent"
android:layout_height="5dp"
android:background="#drawable/toolbar_shadow"/>
</FrameLayout>
</LinearLayout>
#drawable/toolbar_shadow:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient android:startColor="#android:color/transparent"
android:endColor="#88333333"
android:angle="90"/>
</shape>
#color/shadow
<color name="shadow">#e74c3c</color>

Android: How to customise App bar (action bar) like this?

I need exactly like this, i saw some example to customise toolbar but could not design, how to use those gradients and all?

Create a drawable something like this drawable
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient
android:centerColor="#color/app_blue_color"
android:endColor="#color/app_dark_blue_color"
android:startColor="#color/app_dark_blue_color" />
<!--<corners-->
<!--android:bottomLeftRadius="5dp"-->
<!--android:bottomRightRadius="5dp"-->
<!--android:topLeftRadius="5dp"-->
<!--android:topRightRadius="5dp" />-->
<stroke
android:width="0.7dp"
android:color="#color/app_blue_color" />
set this as the background of your customize toolbar
create a ToolbarLayout
<?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="#drawable/toolbarDrawable"
android:gravity="top"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
app:contentInsetStartWithNavigation="0dp"
app:layout_collapseMode="pin"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme"
app:theme="#style/ToolbarColoredBackArrow">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:gravity="center_vertical">
<ImageView
android:id="#+id/RefreshButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:adjustViewBounds="true"
android:padding="8dp"
android:src="#drawable/plus_icon"
android:visibility="gone" />
<TextView
android:id="#+id/toolbarName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_marginRight="#dimen/margin_10"
android:gravity="center"
android:text=""
android:textColor="#color/white"
android:textSize="13sp"
android:textStyle="bold|italic"
android:visibility="visible" />
</RelativeLayout>
</android.support.v7.widget.Toolbar>
In your Activity include layout using
<include
android:id="#+id/toolbar"
layout="#layout/toolbar_title" />
// toolbar_tile is my toolbar layout name

Transparent Toolbar with Fading color

I would like to have a transparent/translucent toolbar in my app, just like this one here:
What I have:
activity_activity_profil.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.appmac.ron.app_newsfeed.ActivityProfil">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/toolbar_color"
app:elevation="0dp"
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="#null"
app:elevation="0dp"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_activity_profil" />
</android.support.design.widget.CoordinatorLayout>
toolbar_color.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient
android:angle="90"
android:centerColor="#4f000000"
android:endColor="#a8000000"
android:startColor="#00000000"
android:type="linear" />
</shape>
I spent many hours searching for a suitable solution, but I couldn't find anything helpful.
Thankful for any help!

I search in web and finally this layout its works.
with material effect.
<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:orientation="vertical">
<android.support.design.widget.CoordinatorLayout
android:id="#+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="235dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/img_top"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:animateLayoutChanges="true"
android:animationCache="false"
android:animationDuration="500"
app:layout_collapseMode="parallax"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/main" />
</android.support.design.widget.CoordinatorLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#25ffffff" />
</RelativeLayout>

Drop shadow on AppBarLayout

I have used Design Support Library's AppBarLayout to show Toolbar and TabLayout in my project.
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark"
android:background="#FF0000">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"/>
<android.support.design.widget.TabLayout
android:id="#+id/tabLayout"
android:scrollbars="horizontal"
android:layout_below="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways" />
</android.support.design.widget.AppBarLayout>
This AppBarLayout cast a drop shadow in Lollipop, however, there is no drop shadow in pre-lollipop devices.
How can I show the drop shadow in pre-lollipop devices as well?

Do note this only works for lollipop and above. It won't work pre lollipop device so you have to create custom xml for shadow like below.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:orientation="vertical">
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/color_alizarin"
android:titleTextAppearance="#color/White"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar" />
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- **** Place Your Content Here **** -->
<View
android:layout_width="match_parent"
android:layout_height="5dp"
android:background="#drawable/toolbar_dropshadow" />
</FrameLayout>
</LinearLayout>
#drawable/toolbar_dropshadow:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<gradient
android:startColor="#android:color/transparent"
android:endColor="#88333333"
android:angle="90"/>
</shape>
#color/color_alizarin
<color name="color_alizarin">#e74c3c</color>

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:background="#android:color/transparent"
android:fitsSystemWindows="true">
<include
android:id="#+id/toolbar"
layout="#layout/toolbar" />
<application.project.freelincerapp.tabs.SlidingTabLayout
android:id="#+id/slidingTabLayout"
android:layout_width="match_parent"
android:fitsSystemWindows="true"
android:layout_height="wrap_content" />
</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_below="#id/appBarLayout"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<View
android:id="#+id/toolbar_shadow"
android:layout_width="match_parent"
android:layout_height="4dp"
android:alpha="0.90"
android:layout_below="#id/appBarLayout"
android:background="#drawable/custome_shadow"/>
</RelativeLayout>

Create an xml file under drawable and name it custom_shadow.xml. Now copy and paste the following code..
<gradient
android:centerColor="#android:color/transparent"
android:endColor="#android:color/transparent"
android:startColor="#android:color/transparent" />
<corners android:radius="0dp" />

<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<View
android:layout_width="match_parent"
android:layout_height="#dimen/ab_shadow_height"
android:background="#drawable/sh_bar" />
</FrameLayout>
</android.support.design.widget.CoordinatorLayout>