Android selector with background image and gradient

Question

I know there are similar post to this but I couldn't find my answer in any of them. So, I have this drawable XML:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="true">
    <bitmap
        android:src="@drawable/bm_btn_background"
        android:tileMode="repeat"
        android:gravity="center" />
</item>
<item android:state_enabled="true">
    <shape android:shape="rectangle">
        <gradient
            android:startColor="#a0e0b071"
            android:endColor="#a0a67637"
            android:angle="270" />
        <stroke
            android:width="1dp"
            android:color="#5c3708" />
        <corners
            android:radius="5dp" />
        <padding
            android:left="10dp"
            android:top="10dp"
            android:right="10dp"
            android:bottom="10dp" />
    </shape>
</item>
<item android:state_pressed="true" >
    <shape>
        <gradient
            android:startColor="#a0a67637"
            android:endColor="#a0e0b071"
            android:angle="270" />
        <stroke
            android:width="1dp"
            android:color="#5c3708" />
        <corners
            android:radius="5dp" />
        <padding
            android:left="10dp"
            android:top="10dp"
            android:right="10dp"
            android:bottom="10dp" />
    </shape>
</item>

I am trying to create a button with a repeated image as background and a gradient applied to it. With this code I only see the background image, not the gradient nor the border and the rounded corners. Also, when I click the button, it doesn't change (the gradient is supposed to change). I don't know what is wrong with this code? If instead of a selector I use a layer-list, I get the desired result but it doesn't change either when I press the button. Thanks for your help!

Answer 1

Your code for the selector is wrong because:

• You have two elements for the same state and as the selector encounters the first state(state_enabled) for the Bitmap element it will stop there and your gradient will never appear(for this you should use a layer-list that has as items the Bitmap and the gradient on top)

• The selector will match states in order. As you press the Button the state_pressed will never be activated because the selector will match first the state_enabled that is on the first element(for this you should move the code for the state_pressed above the state_enabled elements).

In fact you should just remove the state_enabled and let the Bitmap + gradient be the default value for the Button. Bellow is your selector(I assumed you only want to change gradient on the image(but the image should appear even in the pressed state, if this isn't the wanted behavior leave only the gradient for the state_pressed)):

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

    <item android:state_pressed="true">
        <layer-list>
            <item>
                <bitmap android:gravity="center" android:src="@drawable/bm_btn_background" android:tileMode="repeat" />
            </item>
            <item>
                <shape>
                     <gradient android:angle="270" android:endColor="#a0e0b071" android:startColor="#a0a67637" />
                     <stroke android:width="1dp" android:color="#5c3708" />
                     <corners android:radius="5dp" />
                     <padding android:bottom="10dp" android:left="10dp" android:right="10dp" android:top="10dp" />
                </shape>
            </item>
        </layer-list>
    </item>

    <item android:state_enabled="true">
        <layer-list>
            <item>
                <bitmap android:gravity="center" android:src="@drawable/bm_btn_background" android:tileMode="repeat" />
            </item>
            <item>
                <shape android:shape="rectangle">
                    <gradient android:angle="270" android:endColor="#a0a67637" android:startColor="#a0e0b071" />
                    <stroke android:width="1dp" android:color="#5c3708" />
                    <corners android:radius="5dp" />
                    <padding android:bottom="10dp" android:left="10dp" android:right="10dp" android:top="10dp" />
                </shape>
            </item>
        </layer-list>
    </item>


</selector>