Ripple effect won't work when using RelativeLayout with CodeScannerView

[adeldolgov]

Hello! I don't understand what's wrong. I have ImageButton with android:background="?attr/selectableItemBackgroundBorderless" And this located is inside RelativeLayout. Ripple effect doesn't work! I tried to put imagebutton to toolbar, and it works.

[adeldolgov]

My layout :

<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:background="@android:color/transparent"
    tools:context=".Screens.Scanner.ScannerActivity">

    <com.budiyev.android.codescanner.CodeScannerView
        android:id="@+id/scanner_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@null"
        android:elevation="0dp"
        android:visibility="visible"
        app:autoFocusButtonColor="@android:color/white"
        app:autoFocusButtonVisible="false"
        app:flashButtonColor="@color/colorPrimary"
        app:flashButtonVisible="false"
        app:frameAspectRatioHeight="1.04"
        app:frameAspectRatioWidth="0.956"
        app:frameColor="@color/QrFrameColor"
        app:frameCornersSize="63dp"
        app:frameSize="0.5"
        app:frameThickness="10dp"
        app:maskColor="#77000000" />

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/appBar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:background="@color/transparent"
        android:fitsSystemWindows="true"
        android:minHeight="?attr/actionBarSize"
        app:elevation="0dp"
        app:theme="@style/CustomActionBar">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fitsSystemWindows="true"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Dark"
            app:titleTextAppearance="@style/ActionBar.nameText"></androidx.appcompat.widget.Toolbar>
    </com.google.android.material.appbar.AppBarLayout>

    <ImageButton
                android:id="@+id/flashBtn"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:layout_alignParentBottom="true"
                android:layout_marginEnd="44dp"
                android:layout_marginBottom="72dp"
                android:background="?attr/selectableItemBackgroundBorderless"
                app:srcCompat="@drawable/ic_flashlight" />

</RelativeLayout>

[adeldolgov]

Maybe something wrong with maskColor attribute. I tried to create my own drawable with ripple effect but this doesn't work anyway

[yuriy-budiyev]

Probably the promlem is in the TextureView which is used to display preview, try ripple when preview is stopped.

[yuriy-budiyev]

Also, try to use ConstraintLayout instead of RelativeLayout.