Android Layer-List VectorDrawable size

Question

My question is related to this one: link. I've recently changed most of my resources for Android from different png files for different resolutions to vector drawables. I'm using a "swipe-to-delete" library that can change the background of its views during the swipe to show a Gmail-style red background with a trashcan icon, something similar to this (which has a green background with a check icon) :

I used to do that using the following code, and I still do for < API 21

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <color android:color="@color/accent"/>
    </item>
    <item android:right="@dimen/activity_horizontal_margin">
        <bitmap
            android:gravity="right|center_vertical"
            android:src="@drawable/ic_delete_24dp"/>
    </item>
</layer-list>

However, different syntax is required for API 21+

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <color android:color="@color/accent" />
    </item>
    <item android:right="@dimen/activity_horizontal_margin"
          android:drawable="@drawable/ic_delete_24dp"
          android:gravity="right|center_vertical"/>
</layer-list>

Now, instead of an icon on the left/right hand side, the icon on API 21 & API 22 (Lollipop) is stretched to fill the screen. Is there any way to specify the width of the icon?

Vicious

Just as an update, this bug is fixed past API 23 (Marshmallow), and only exists on Lollipop – Vicious

The property android:drawable gives crash in API 19 and app:srcCompat doesnt seem to work in layer-list. How are you handling it? – Photoneutron

Answer 1

Add this to your app level build.gradle file

defaultConfig {
     vectorDrawables.useSupportLibrary = true
}

Sill