avb avb - 5 months ago 567
Android Question

Add elevation/shadow on toolbar for pre-lollipop devices

I updated my android app to the new material design, but I also wanted to add some shadow or elevation to the Toolbar. There seem to be some (hacky) ways of doing it via images/9-patches, but I wonder if it can be done via the support libraries. (just like the

CardView
can have elevation)

According to this answer on another question, this is possible by wrapping the
Toolbar
in a
AppBarLayout
, but this doesn't work for me.

My layout:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.AppBarLayout 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="wrap_content">
<android.support.v7.widget.Toolbar
android:id="@+id/Toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.AppBarLayout>


I also tried setting elevation via XML and through code, but that doesn't work either.

Any help would be appreciated! Thanks in advance.

Update:

Since I include my Toolbar layout in my other layouts, below is one of my main layouts:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
layout="@layout/Toolbar" />
<fragment
class="OverAllField.XamarinAndroid.Fragments.Planning.PlanningFragment"
android:id="@+id/PlanningFragment"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
</LinearLayout>

Answer

For Android 5.0 and above : AppBarLayout automatically provides/gives shadow in the layout. You can also increase the elevation of the AppBarLayout by app:elevation="4dp".

For Pre-Lollipop : You can use the following link: http://blog.grafixartist.com/add-a-toolbar-elevation-on-pre-lollipop/

Note: Toolbar also supports elevation to it, using android:elevation="4dp"

New Update: In Appcompat v24.0.0, you can not set elevation to AppBarLayout using setElevation() and app:elevation as these are deprecated.

You have to use stateListAnimator property to set elevation now.

appbar_always_elevated.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
    <objectAnimator android:propertyName="elevation"
                    android:valueTo="8dp" 
                    android:valueType="floatType"
                    android:duration="1"/>
</item>
</selector>

In AppbarLayout :

<android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:fitsSystemWindows="true"
        android:stateListAnimator="@animator/appbar_always_elevated"
        android:theme="@style/AppTheme.AppBarOverlay">

</android.support.design.widget.AppBarLayout>