how to remove shadow below actionbar with AppCompat.Light.NoActionBar?

Question

I tried to remove the shadow below the toolbar with the Theme.AppCompat.Light.NoActionBar, using every recommendation of people who have ever answer it before, but no one worked. I tried

<item name="android:windowContentOverlay">@null</item>     

and

<item name="android:windowContentOverlay">@drawable/solid_line</item> ....  <shape xmlns:android="http://schemas.android.com/apk/res/android"android:shape="rectangle"> <solid android:color="@color/accueil_color" /> <size android:height="15dp" /> </shape> 

and with this,

android:elevation="0dp" 

the shadow goes from the top of the screen but not disapear.

Have you any idea for totally remove this shadow line ??

Answer 1

I'm not an expert but I run into the same problem just a few hours ago. So the idea here is that with AppCompat we have to manage the library attributes rather than Android attributes. In other words, instead of android:elevation try app:elevation:

<android.support.design.widget.AppBarLayout     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     android:id="@+id/appbar"     android:layout_width="match_parent"     android:layout_height="?attr/actionBarSize"     android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"     android:fitsSystemWindows="true"     app:elevation="0dp">      <android.support.v7.widget.Toolbar         xmlns:app="http://schemas.android.com/apk/res-auto"         android:id="@+id/toolbar"         android:layout_width="match_parent"         android:layout_height="match_parent"         app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />  </android.support.design.widget.AppBarLayout> 

EDIT :

I just tried another option without AppBarLayout. This way works perfectly fine for me, the shadow is completely gone. So I suspect the problem is in your other View. I don't think it's your ToolBar drops the shadow.

<android.support.v7.widget.Toolbar     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"     app:popupTheme="@style/ThemeOverlay.AppCompat.Light"     android:id="@+id/toolbar"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:minHeight="?attr/actionBarSize"     app:elevation="0dp" />