CODEWITHSUNDEEP
androidandroid-layout
svkaka
svkaka

Reputation: 4022

Make child height update height of his siblings

Is there any way to define childHeight as more important than its siblings and propagate its size to (less important) siblings.

Consider this layout

<RelativeLayout
  match_parent,match_parent>

    <FrameLayout 
      match_parent,match_parent>

        <ViewA
          this view size is important and its siblings should have same size, set on Runtime.
          layout_gravity="center"/>

        <ViewB
          match_parent,match_parent
          layout_gravity="center"
          (should have the size of ViewB)  />

    </FrameLayout>

</RelativeLayout>

I know how to do it using ConstrainLayout but I am asking just out of curiosity

<ConstraintLayout>
      <ViewA
       wrap_content,wrap_content
       constraint_to="parent"/>

       <ViewB
          0dp,0dp
          constraint_to="ViewA"
          layout_gravity="center"
          (should have the size of ViewA)  />
</ConstraintLayout>

Use case I have cameraView (ViewA) and cameraOverlay (ViewB). ViewA changes it's size according to user preference (16:9 | 4:3...) and ViewB (has some alpha) must always overlap whole ViewA.

Edit: Forgot to add that I don't want to change size of viewB manually

Upvotes: 3

Views: 148

Answers (1)

Jakub Gabčo
Jakub Gabčo

Reputation: 266

I understand that you change the height/width of viewA programmatically. So you have the height and width resources available.

To others who have the same problem, to set the height of the View:

viewB.getLayoutParams().height = heightViewA;
viewB.getLayoutParams().width = widthViewB;

Hope this helps.

Important. If you're setting the height after the layout has already been 'laid out', make sure you also call:

viewB.requestLayout()

Another option is to use RelativeLayout

<RelativeLayout
       wrap_content,wrap_content    
>
      <ViewA
       wrap_content,wrap_content
       constraint_to="parent"/>

       <ViewB
          match_parent,match_parent
          constraint_to="ViewA"
          layout_gravity="center"
          (should have the size of ViewA)  />
</RelativeLayout>

And in RelativeLayout you can overlay them.

Upvotes: 1

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