Transparent panel with Umano SlidingUpPanel

Question

I have created a sliding layout using the Umano code: https://github.com/umano/AndroidSlidingUpPanel

It works perfectly, but I have one problem. My panel should be partly transparent, so the original view is still visible when it's up.

The view background is set properly to #64000000, but it is still completely opaque and nothing can be seen behind it.

Here's the code:

<com.sothree.slidinguppanel.SlidingUpPanelLayout
            android:id="@+id/sliding_up_panel"
            android:layout_height="match_parent"
            android:layout_width="match_parent">

    <ImageView
            android:layout_height="match_parent"
            android:layout_width="match_parent"
            android:scaleType="fitCenter"
            android:id="@+id/images_gallery_image" />

    <RelativeLayout
            android:layout_width="fill_parent"
            android:layout_height="match_parent"
            android:background="#64000000">

            <!-- MY STUFF (transparent stuff) -->

    </RelativeLayout>
</com.sothree.slidinguppanel.SlidingUpPanelLayout>

I thought maybe the issue is caused by hiding of UI elements underneath the expanded panel, so I tried to play around in the library code, but it doesn't seem to be related.

While debugging, I have noticed that hasOpaqueBackground(View v) in line 355 of the library does return false, as expected - but the view still is opaque.

Answer 1

The support for this has been added in the library. Just set overlay attribute to true, and set the color of the panel to transparent.