Programatically created drawable not shown in imageview

Issue

I am trying to create a rectangle drawable inside an image view.

val backgroundRect = GradientDrawable()
backgroundRect.shape = GradientDrawable.RECTANGLE
backgroundRect.setBounds(0,0, 100, 100)
backgroundRect.setStroke(5, Color.parseColor("#585858"))
backgroundRect.setColor(Color.parseColor("#FF9009"))

val image = ImageView(context)
image.layoutParams = ConstraintLayout.LayoutParams(ConstraintLayout.LayoutParams.WRAP_CONTENT, ConstraintLayout.LayoutParams.WRAP_CONTENT)
image.setImageDrawable(backgroundRect)
rootView.addView(image)

The problem is if I set the ImageView layout params as WRAP_CONTENT then nothing displays but if I set the params as image.layoutParams = ConstraintLayout.LayoutParams(100, 100) then the ImageView is displayed. I tried creating the rectangle drawable using xml and if I set it there the image is still shown.

<ImageView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/dummyRectangle"/>

Do I need to always specify the layout params variable or is there another way to set it?

Solution

Just set a size to your GradientDrawable

backgroundRect.setSize(100,100);

Because your view has no size yet. And when you used wrap_content you did not have any content to wrap.

Answered By - Anisuzzaman Babla