android - How to set foreground attribute to other non FrameLayout view

Question

I would like to know how to apply or emulate foreground effect in a view different from FrameLayout, as LinearLayout or RelativeLayout

This is what I have now:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/cardContent"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/row_background"
    android:foreground="@drawable/foreground_row">

    ...

</FrameLayout>

And I want something like:

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/cardContent"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/row_background"
        app:foreground="@drawable/foreground_row">

        ...

    </RelativeLayout>

Thanks in advance!!

Answer 1

The idea is to surround your layout with a FrameLayout, and set the selector and the onClick event to this layout.

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             android:id="@+id/selectableItem"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:foreground="@drawable/foreground_row"
    >

   <RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/cardContent"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/row_background">

        ...

    </RelativeLayout>
</FrameLayout>

You can find a full explanation at my blog:

http://antonioleiva.com/unveiling-bandhook-foreground-any-layout/

Or you can extend rhis FRelativeLayout https://gist.github.com/shakalaca/6199283