Transparent bottom sheet layout in Android -

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i trying make transparent bottom sheet layout, allow me see contents of view below it. bottom sheet working expected, when set background either @null or @android:color/transparent, layout's view white, opposed transparent. layout follows:

app_bar_main.xml:

<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">     <!-- stuff here -->     <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">     </linearlayout>  </android.support.design.widget.coordinatorlayout>

the linear layout id bottom_sheet holds, well, bottom sheet. sheet defined follows:

<?xml version="1.0" encoding="utf-8"?> <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">     <linearlayout android:layout_width="match_parent"         android:layout_height="match_parent"         android:background="@null"         android:orientation="vertical">          <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">         </linearlayout>         <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">              <progressbar                 android:layout_width="match_parent"                 android:layout_height="wrap_content"                 android:gravity="center"                 android:id="@+id/my_progress_bar" />              <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" />              <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" />         </linearlayout>     </linearlayout>      <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"/> </android.support.design.widget.coordinatorlayout> 

private void setupdialogbackground() {     getdialog().setonshowlistener(new dialoginterface.onshowlistener() {         @override         public void onshow(dialoginterface dialog) {             bottomsheetdialog d = (bottomsheetdialog) dialog;             framelayout bottomsheet = (framelayout) d.findviewbyid(r.id.design_bottom_sheet);             if (bottomsheet == null)                 return;             bottomsheetbehavior = bottomsheetbehavior.from(bottomsheet);             bottomsheet.setbackground(null);         }     }); }

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