STANDARD ANDROID BUTTON WITH A DIFFERENT COLOR

ezra heywood

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Posted by  ezra heywood
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I'd like to change the color of a standard Android button slightly in order to better match a client's branding.

The best way I've found to do this so far is to change the Button's drawable to the following drawable located in res/drawable/red_button.xml:

<?xml version="1.0" encoding="utf-8"?>    
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" android:drawable="@drawable/red_button_pressed" />
    <item android:state_focused="true" android:drawable="@drawable/red_button_focus" />
    <item android:drawable="@drawable/red_button_rest" />
</selector>
But doing that requires that I actually create three different drawables for each button I want to customize (one for the button at rest, one when focused, and one when pressed). That seems more complicated and non-DRY than I need.

All I really want to do is apply some sort of color transform to the button. Is there an easier way to go about changing a button's color than I'm doing?
  1. Mayank Tripathi

    Post:397

    Points:3117
    Re: Standard Android Button with a different color

    Put something like the following code in a file named custom_button.xml and then set background="@drawable/custom_button" in your button view:

    <?xml version="1.0" encoding="utf-8"?>
    <selector
        xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_pressed="true" >
            <shape>
                <gradient
                    android:startColor="@color/yellow1"
                    android:endColor="@color/yellow2"
                    android:angle="270" />
                <stroke
                    android:width="3dp"
                    android:color="@color/grey05" />
                <corners
                    android:radius="3dp" />
                <padding
                    android:left="10dp"
                    android:top="10dp"
                    android:right="10dp"
                    android:bottom="10dp" />
            </shape>
        </item>
        <item android:state_focused="true" >
            <shape>
                <gradient
                    android:endColor="@color/orange4"
                    android:startColor="@color/orange5"
                    android:angle="270" />
                <stroke
                    android:width="3dp"
                    android:color="@color/grey05" />
                <corners
                    android:radius="3dp" />
                <padding
                    android:left="10dp"
                    android:top="10dp"
                    android:right="10dp"
                    android:bottom="10dp" />
            </shape>
        </item>
        <item>        
            <shape>
                <gradient
                    android:endColor="@color/blue2"
                    android:startColor="@color/blue25"
                    android:angle="270" />
                <stroke
                    android:width="3dp"
                    android:color="@color/grey05" />
                <corners
                    android:radius="3dp" />
                <padding
                    android:left="10dp"
                    android:top="10dp"
                    android:right="10dp"
                    android:bottom="10dp" />
            </shape>
        </item>
    </selector>

    You can also programmatically set the shade of the entire button.This will change the button colour rather than just the tint.
    If you start with a standard grey shaded button:

    button.getBackground().setColorFilter(0xFFFF0000, PorterDuff.Mode.MULTIPLY);
    will give you a red shaded button,

    button.getBackground().setColorFilter(0xFF00FF00, PorterDuff.Mode.MULTIPLY);
    will give you a green shaded button etc., where the first value is the colour in hex format.

    It works by multiplying the current button colour value by your colour value. I'm sure there's also a lot more you can do with these modes.

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