Programmatically change colors in drawable xml file

Question

I need to change my application's colors during runtime. I parse data file to get colors and I save it in class with static fields and methods:

public class Colors {

    private static String colorOneBackground = "#00577F";
    private static String colorOneForeground = "#FFFFFF";

    public static void setColorOneBackground(String colorOneBackground) {
        Colors.colorOneBackground = colorOneBackground;
    }

    public static int getColorOneForeground() {
        return Color.parseColor(colorOneForeground);
    }
    // more colors...

Then, for example when I want to change the background of screen I do it so:

RelativeLayout relativeLayout = (RelativeLayout) myView.findViewById(R.id.loginBackground);
        relativeLayout.setBackgroundColor(Colors.getColorOneBackground());

Same with textviews and other widgets. However, I have encountered one problem. Some styles are defined in Drawable folder, for example, mybutton.xml:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android=" http://schemas.android.com/apk/res/android "
    android:shape="rectangle">
    <gradient
        android:startColor="#FFFFFF"
        android:centerColor="#FFFFFF"
        android:endColor="#FFFFFF"
        android:angle="270" />
    <corners android:radius="5dp" />
    <stroke android:width="3px" android:color="#000000" />
</shape>

And I set this as my button's background:

<Button  
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:id="@+id/title"
   android:background="@drawable/mybutton" />

As I said I want to change these color values programatically. So I want to know if it is possible to dinamically change color values defined in xml file?

Please read my question once again. I want to change color values in xml file and I know how to set drawable background in code — Naujas Tewas
– Naujas Tewas, Commented Jan 22, 2017 at 11:53
In your link the color is being changed using this approach: GradientDrawable gradientDrawable = (GradientDrawable) background; gradientDrawable.setColor(getResources().getColor(R.color.colorToSet)); but in my xml file I may have different colors for startColor, centerColor and endColor so setColor() mehod won't work... — Naujas Tewas
– Naujas Tewas, Commented Jan 22, 2017 at 12:15
Doing the above is unnecessary and just complicates your code..You don't need to redefine the colors in xml files.. Just define the different colors used in your application inside the colors.xml and use the methods specified in the previous comments to set them. — ashkhn
– ashkhn, Commented Jan 22, 2017 at 12:47

rafsanahmad007 · Accepted Answer · 2017-01-22 14:46:00Z

3

try this : to change color in your drawable xml file:

button.setBackgroundResource(R.drawable.mybutton);  //drawable id
GradientDrawable gd = (GradientDrawable) button.getBackground().getCurrent();
gd.setColor(Color.parseColor("#000000")); //set color
gd.setStroke(2, Color.parseColor("#00FFFF"), 5, 6);

answered Jan 22, 2017 at 14:46

rafsanahmad007

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2 Comments

Naujas Tewas Over a year ago

I finally managed to solve the problem by myself... Anyway, thanks for the help;)

Stefanija Over a year ago

than post your answer

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