Can't set visibility on constraint group

Question

When i try to set the visibility of the group on button click,it doesn\'t affect the view\'s visibility.Using com.android.support.constraint:constraint-layout:1.1.0-beta4. I

Answer 1

android.support.constraint.Group has a public method

 public void updatePreLayout(ConstraintLayout container) {
   ...
 }

that updates children visibilities, so calling

dataGroup.visibility = if (visible) View.VISIBLE else View.INVISIBLE
dataGroup.updatePreLayout(root)

worked for me

Answer 2

You can also simply call requestLayout method after changing Group visibility to View.INVISIBLE.

fun makeGroupInvisible(group: Group) {
    group.visibility = View.INVISIBLE
    group.requestLayout()
}

Problem is that android.support.constraint.Group updates visibility of its members in updatePreLayout method which is called from onMeasure in ConstraintLayout.

Answer 3

Just clean your project or Rebuild your project

Answer 4

just add follow line you can change it . so it visible .

group.visibility=ConstraintLayout.GONE

Answer 5

Update: This was reported as fixed in ConstraintLayout version 2.0.0 beta 6. See bug fixes for ConstraintLayout 2.0.0 beta 6 .

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This looks like a bug to me. GONE works but INVISIBLE doesn't and I think it should. It may be worth a bug report unless someone can post where my thinking is wrong. (I am using constraint-layout:1.1.0-beta4.)

In the meantime, here is a work-around that explicitly retrieves the ids within the group and sets the visibility of each retrieved view.

Within MainActivity.kt

private fun toggleLoginUI(show: Boolean) {
    if (show) {
        setGroupVisibility(mLayout, group, Group.VISIBLE)
    } else {
        setGroupVisibility(mLayout, group, Group.INVISIBLE)
    }
}

private fun setGroupVisibility(layout: ConstraintLayout, group: Group, visibility: Int) {
    val refIds = group.referencedIds
    for (id in refIds) {
        layout.findViewById<View>(id).visibility = visibility
    }
}

mLayout is the ConstraintLayout.

Update: Here is another work-around that takes advantage of the fact that changing to/from GONE works as expected:

private fun toggleLoginUI(show: Boolean) {
    if (show) {
        group.visibility = GONE
        group.visibility = VISIBLE
    } else {
        group.visibility = GONE
        group.visibility = INVISIBLE
    }
}

Answer 6

Had the same problem and nothing from above helps. My solution was to setVisibility(viewId, ConstraintSet.VISIBLE) inside constraint set and apply that to ConstraintLayout view.

For example:

myContstraintSet.apply {
    setVisibility(firstGroup.id, ConstraintSet.VISIBLE)
    setVisibility(secondGroup.id, ConstraintSet.GONE)

    connect(oneView.id, ConstraintSet.BOTTOM, R.id.secondView, ConstraintSet.TOP)
    clear(anotherView.id, ConstraintSet.TOP)
}
myContstraintSet.applyTo(myConstraintLayout)