Transparent bottom sheet layout in Android
<p>I am trying to make a transparent bottom sheet layout, that would allow me to see the contents of the view below it. The bottom sheet is working as expected, however when I set the background to either <code>@null</code> or <code>@android:color/transparent</code>, the layout's view is white, as opposed to transparent. My layout is as follows:</p>

<p>app_bar_main.xml:</p>

<pre><code>&lt;android.support.design.widget.CoordinatorLayout 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:id="@+id/coordinatorLayout"
    android:background="@android:color/transparent"
    android:fitsSystemWindows="true"
    tools:context=".core.activities.MainActivity"&gt;
    &lt;!-- stuff here --&gt;
    &lt;LinearLayout
        android:id="@+id/bottom_sheet"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:background="@null"
        android:orientation="vertical"
        app:layout_behavior="@string/bottom_sheet_behavior"&gt;
    &lt;/LinearLayout&gt;

&lt;/android.support.design.widget.CoordinatorLayout&gt;
</code></pre>

<p>The linear layout with id <code>bottom_sheet</code> holds, well, my bottom sheet. The sheet itself is defined as follows:</p>

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:background="@null"
    android:layout_height="match_parent"&gt;
    &lt;LinearLayout android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@null"
        android:orientation="vertical"&gt;

        &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/bottom_sheet_placeholder_layout"
            android:layout_weight="0.6"
            android:layout_width="match_parent"
            android:background="@null"
            android:layout_height="50dp"
            android:orientation="horizontal"&gt;
        &lt;/LinearLayout&gt;
        &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/bottom_sheet_layout"
            android:layout_margin="0dp"
            android:layout_weight="0.4"
            android:layout_width="match_parent"
            android:background="@color/my_background"
            android:layout_height="wrap_content"
            android:orientation="vertical"&gt;

            &lt;ProgressBar
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:id="@+id/my_progress_bar" /&gt;

            &lt;TextView
                android:layout_marginTop="5dp"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:text="Large Text"
                android:textColor="@color/my_text"
                android:id="@+id/txt_my_info"
                android:layout_gravity="center_horizontal"
                android:visibility="gone"
                android:textSize="48px" /&gt;

            &lt;TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="Medium Text"
                android:id="@+id/txt_my_address"
                android:textColor="@color/my_secondary_text"
                android:visibility="gone"
                android:layout_gravity="center_horizontal" /&gt;
        &lt;/LinearLayout&gt;
    &lt;/LinearLayout&gt;

    &lt;android.support.design.widget.FloatingActionButton
        android:id="@+id/btn_edit_tree_info"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:layout_marginTop="-62dp"
        android:elevation="100dp"
        android:src="@drawable/ic_create_black_24dp"
        app:layout_anchor="@id/bottom_sheet_layout"
        app:layout_anchorGravity="top|end|right"
        app:useCompatPadding="true"/&gt;
&lt;/android.support.design.widget.CoordinatorLayout&gt;
</code></pre>