How to pass colors to Android library?

Question

I am creating an android library and I want to know the best way to pass colors from the main app module to my library.

I have the below colors in my colors file.

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="textColor1">#848484</color>
    <color name="textColor2">#99848484</color>
    <color name="textColor3">#676767</color>
    <color name="textColor4">#e7e6e6</color>
</resources>

What I want to do is to enable the user of the library to pass values for these colors programmatically so I can use them in my library using the normal way:

In XML:

android:textColor="@color/textColor1"

or in Java:

setTextColor(ActivityCompat.getColor(context, R.color. textColor1));

Answer 1

There are many way to create this functionality. Below is one of them: In Libray create util class:

class Utility{
public static int myColor = 0;    
     public void setColor (@ColorInt int colorId){ // integer id 
         myColor = colorId;
     }

}

Use this colorId in anywhere in your library

for ex.

textView.setTextColor(ContextCompact.getColor(context, Utility.myColor);

Apply color from your project like:

Utility.setColor(R.color.colorPrimary);