how to pass property from control to drawable in android using xml?

Question

I was looking for how to create rounded buttons and it's simple enough. But I would like to be able to pass the color property to the drawable so that I can pass a different color for various buttons in the app instead of having to create a separate drawable xml for each color. In wpf we could reference the properties passed in using bindings, but I'm not sure what the proper method is in android.

button_rounded.xml

     <Button   
         color = "white"
         android:background="@drawable/rounded_button"
                        />

     <Button   
          color = "blue"
          android:background="@drawable/rounded_button"
                        />

I want to be able to pass the color from xml to the drawable rounded button so that I can maintain only one xml file. Is this possible in android?

well, that is not quite what I am looking for. What I really want is a way to set the shape in xml — James Joshua Street, Oct 20 '20 at 04:47

TaQuangTu · Accepted Answer · 2020-10-20T05:05:23.593

1

In Kotlin:

(yourButton.background as ShapeDrawable).paint.color = new_color_value

You can also adjust the ShapeDrawable before assigning to for a View.

val drawable = ContextCompat.getDrawable(context,R.drawable.your_shape) as ShapeDrawable
drawable.paint.color = your_another_color

Another way is using backgroundTint:

  <Button
      android: backgroundTint = "your_new_color"
      android: background = "@drawable/your_shape"
   />

edited Oct 20 '20 at 05:05

answered Oct 20 '20 at 05:01

TaQuangTu

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I see. so it's not possible to pass these variables through xml alone then? – James Joshua Street Oct 20 '20 at 05:02
@JamesJoshuaStreet I modified my answer a little bit. – TaQuangTu Oct 20 '20 at 05:05
1

thank you sorry for the noob questions. I've done this sort of stuff in windows before but haven't had to do android gui till yesterday. anyway not sure how good my xml code is, but the result looks very nice at least – James Joshua Street Oct 20 '20 at 05:14

how to pass property from control to drawable in android using xml?

1 Answers1