I'm updating my app with the new Toolbar from the support library v21. My problem is that the toolbar does not cast any shadow if I don't set the "elevation" attribute. Is that the normal behavior or I'm doing something wrong?
My code is:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/my_awesome_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:elevation="4dp"
android:minHeight="?attr/actionBarSize"
app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
<FrameLayout
android:id="@+id/FrameLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent">
.
.
.
And in my Activity - OnCreate method:
Toolbar toolbar = (Toolbar) findViewById(R.id.my_awesome_toolbar);
setSupportActionBar(toolbar);
This question is related to
android
android-5.0-lollipop
material-design
android-toolbar
All you need is a android:margin_bottom
equal to the android:elevation
value. No AppBarLayout
, clipToPadding
, etc. required.
Example:
<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_marginBottom="4dp"
android:background="@android:color/white"
android:elevation="4dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<!--Inner layout goes here-->
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.appcompat.widget.Toolbar>
i added
<android.support.v7.widget.Toolbar
...
android:translationZ="5dp"/>
in toolbar description and it works for me. Using 5.0+
actionbar_background.xml
<item>
<shape>
<solid android:color="@color/black" />
<corners android:radius="2dp" />
<gradient
android:startColor="@color/black"
android:centerColor="@color/black"
android:endColor="@color/white"
android:angle="270" />
</shape>
</item>
<item android:bottom="3dp" >
<shape>
<solid android:color="#ffffff" />
<corners android:radius="1dp" />
</shape>
</item>
</layer-list>
add to actionbar_style background
<style name="Theme.ActionBar" parent="style/Widget.AppCompat.Light.ActionBar.Solid">
<item name="background">@drawable/actionbar_background</item>
<item name="android:elevation">0dp</item>
<item name="android:windowContentOverlay">@null</item>
<item name="android:layout_marginBottom">5dp</item>
name="displayOptions">useLogo|showHome|showTitle|showCustom
add to Basetheme
<style name="BaseTheme" parent="Theme.AppCompat.Light">
<item name="android:homeAsUpIndicator">@drawable/home_back</item>
<item name="actionBarStyle">@style/Theme.ActionBar</item>
</style>
Was toying with this for hours, here's what worked for me.
Remove all the elevation
attributes from the appBarLayout
and Toolbar
widgets (including styles.xml
if you are applying any styling).
Now inside activity,apply the elvation
on your actionBar
:
Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setElevation(3.0f);
This should work.
If you are seting the ToolBar
as ActionBar
then just call:
getSupportActionBar().setElevation(YOUR_ELEVATION);
Note: This must be called after setSupportActionBar(toolbar);
In my situation elevation doesn't work well because I haven't given any background to the toolbar. Try giving background color to the toolbar then set elevation and it will work well.
Google released the Design Support library a few weeks ago and there is a nifty solution for this problem in this library.
Add the Design Support library as a dependency in build.gradle
:
compile 'com.android.support:design:22.2.0'
Add AppBarLayout
supplied by the library as a wrapper around your Toolbar
layout to generate a drop shadow.
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
.../>
</android.support.design.widget.AppBarLayout>
Here is the result :
There are lots of other tricks with the design support library.
As above but with dependency:
implementation 'com.google.android.material:material:1.0.0'
and com.google.android.material.appbar.AppBarLayout
For 5.0 + : You can use AppBarLayout with Toolbar. AppBarLayout has "elevation" attribure.
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:elevation="4dp"
android:layout_height="wrap_content"
android:orientation="vertical">
<include layout="@layout/toolbar" />
</android.support.design.widget.AppBarLayout>
This worked for me very well:
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/primary"
card_view:cardElevation="4dp"
card_view:cardCornerRadius="0dp">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/primary"
android:minHeight="?attr/actionBarSize" />
</android.support.v7.widget.CardView>
My problem is that the toolbar does not cast any shadow if I don't set the "elevation" attribute. Is that the normal behavior or I'm doing something wrong?
That's the normal behavior. Also see the FAQ at the end of this post.
I had similar problem with the shadow. The shadow is drawn by direct parent of AppBarLayout in my case. If height of the parent is the same as AppBarLayout's the shadow cannot be drawn. So checking size of the parent layout and maybe layout remake can solve the problem. https://www.reddit.com/r/androiddev/comments/6xddb0/having_a_toolbar_as_a_fragment_the_shadow/
I am posting this because this took me hours to find so i hope it may help someone.
I had a problem that the shadow/elevation was not showing though i created a simple activity and placed the toolbar as follows:
<androidx.appcompat.widget.Toolbar
android:id="@+id/mt_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
android:background="@color/colorPrimaryDark"
android:elevation="12dp"/>
It turns out that in the manifest
setting android:hardwareAccelerated="false"
was causing it! once i removed it, the shadow appeared
Use /values folders to apply the correct shadow style based on OS version.
For under 5.0 devices, use /values/styles.xml to add windowContentOverlay to the body of your activity:
<style name="MyViewArea">
<item name="android:foreground">?android:windowContentOverlay</item>
</style>
<style name="MyToolbar">
<item name="android:background">?attr/colorPrimary</item>
</style>
Then add your own custom shadow by changing your Theme to include:
<item name="android:windowContentOverlay">@drawable/bottom_shadow</item>
You can grab Google's IO app shadow resource here: https://github.com/google/iosched/blob/master/android/src/main/res/drawable-xxhdpi/bottom_shadow.9.png
For 5.0 devices & later, use /values-v21/styles.xml to add elevation to your toolbar using a custom header style:
<style name="MyViewArea">
</style>
<style name="MyToolbar">
<item name="android:background">?attr/colorPrimary</item>
<item name="android:elevation">4dp</item>
</style>
Note that in the second case, I had to create an empty MyViewArea style so the windowContentOverlay wouldn't show up too.
[Update: changed resource names and added Google shadow.]
You can't use the elevation attribute before API 21 (Android Lollipop). You can however add the shadow programmatically, for example using a custom view placed below the Toolbar.
@layout/toolbar
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/blue"
android:minHeight="?attr/actionBarSize"
app:theme="@style/ThemeOverlay.AppCompat.ActionBar" />
<View
android:id="@+id/toolbar_shadow"
android:layout_width="match_parent"
android:layout_height="3dp"
android:background="@drawable/toolbar_dropshadow" />
@drawable/toolbar_dropshadow
<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>
in your activity layout
<include layout="@layout/toolbar" />
The correct answer will be to add
android:backgroundTint="#ff00ff"
to the tool bar
with
android:background="@android:color/white"
If you use other color then white for the background it will remove the shadow. Nice one Google!
Most solutions work fine here. Would like to show another, similar alternative :
gradle:
implementation 'androidx.appcompat:appcompat:1.0.0-rc02'
implementation 'com.google.android.material:material:1.0.0-rc02'
implementation 'androidx.core:core-ktx:1.0.0-rc02'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
You layout can have a Toolbar View, and a shadow for it, below, similar to this (need modification of course) :
<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">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:titleTextAppearance="@style/Base.TextAppearance.Widget.AppCompat.Toolbar.Title"/>
<include
layout="@layout/toolbar_action_bar_shadow"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
res/drawable-v21/toolbar_action_bar_shadow.xml
<androidx.appcompat.widget.AppCompatImageView
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="wrap_content" android:src="@drawable/msl__action_bar_shadow"/>
res/drawable/toolbar_action_bar_shadow.xml
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent" android:layout_height="wrap_content"
android:foreground="?android:windowContentOverlay" tools:ignore="UnusedAttribute"/>
res/drawable/msl__action_bar_shadow.xml
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<shape
android:dither="true"
android:shape="rectangle" >
<gradient
android:angle="270"
android:endColor="#00000000"
android:startColor="#33000000" />
<size android:height="10dp" />
</shape>
</item>
</layer-list>
styles.xml
<resources>
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
</resources>
MainActivity.kt
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
setSupportActionBar(toolbar as Toolbar)
}
}
Full sample here, as I've noticed the IDE has a bug of saying foreground
attribute is too new to be used here.
You can also make it work with RelativeLayout
. This reduces layout nesting a little bit ;)
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
android:id="@+id/toolbar"
layout="@layout/toolbar" />
<FrameLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@id/toolbar" />
<View
android:layout_width="match_parent"
android:layout_height="5dp"
android:layout_below="@id/toolbar"
android:background="@drawable/toolbar_shadow" />
</RelativeLayout>
Source: Stackoverflow.com