小编SS2*_*095的帖子

当我尝试在按钮单击时设置组的可见性时,它不会影响视图的可见性.使用com.android.support.constraint:constraint-layout:1.1.0-beta4.我已经尝试过没有问题地设置元素,但是没有成功.

我的MainActivity.kt

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

fun onClick(view: View) {
    when (view.id) {
        R.id.button -> toggleLoginUI(true)
        R.id.button4 -> toggleLoginUI(false)
    }
}

我的activity_main.xml

    <android.support.constraint.ConstraintLayout..

            <TextView
                android:id="@+id/textView"
... />

            <TextView
                android:id="@+id/textView2"
... />

            <Button
                android:id="@+id/button"
.../>

            <Button
                android:id="@+id/button4"
... />


            <android.support.constraint.Group
                android:id="@+id/group"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:visibility="visible"
                app:constraint_referenced_ids="textView,textView2" />
            </android.support.constraint.ConstraintLayout>