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Question

I have created a custom SeekBar which uses a LayerList. I haven't used a drawable resource.

It says here that my "item"...

Drawable resource. Required . Reference to a drawable resource.

Will I encounter any problems if I do not create a drawable resource for this item?

custom_seek_bar.xml:

<?xml version="1.0" encoding="UTF-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

    <item android:id="@android:id/bkg">
        <shape>
            <corners android:radius="12dp" />
            <solid
                android:color="@color/white" />
        </shape>
    </item>
    <item android:id="@android:id/prog">
        <clip>
            <shape>
                <corners android:radius="12dp" />
            <solid
                android:color="@color/blue" />
            </shape>
        </clip>
    </item>

</layer-list>

Answer 1

As the docs says:

A LayerDrawable is a drawable object that manages an array of other drawables.

The equivalent of in Java code is the Layer Drawable. ( http://developer.android.com/reference/android/graphics/drawable/LayerDrawable.html )

So it will probably not accept it without the resources. It was really a bad idea to give such a generic name (layer-list) to something related only to drawables.

Hope that it helps!