我有一个在单元格内使用ConstraintLayout的布局。满足条件后,我将可见性设置为3个视图中的2个。之后,我尝试重置视图的约束,以便可以将唯一可见的视图居中。但是,视图是水平居中放置,而不是居中放置。在下面,您可以找到我的布局和用于重置约束的代码。
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/card_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardBackgroundColor="@color/blue">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/constraint_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/image"
android:layout_width="0dp"
android:layout_height="0dp"
android:scaleType="centerCrop"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/text_one"
android:textColor="@color/white_100"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/image"/>
<TextView
android:id="@+id/text_two"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/text_one"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
private fun centerText(holder: ViewHolder) {
holder.image = View.GONE
holder.text_two = View.GONE
val set = ConstraintSet()
set.clear(holder.image.id)
set.clear(holder.text_one.id)
set.clear(holder.text_two.id)
set.applyTo(holder.constraintLayout)
set.constrainHeight(holder.text_one.id,
ConstraintSet.WRAP_CONTENT)
set.constrainWidth(holder.text_one.id,
ConstraintSet.WRAP_CONTENT)
set.connect(holder.text_one.id, ConstraintSet.LEFT,
ConstraintSet.PARENT_ID, ConstraintSet.LEFT, 0)
set.connect(holder.text_one.id, ConstraintSet.RIGHT,
ConstraintSet.PARENT_ID, ConstraintSet.RIGHT, 0)
set.connect(holder.text_one.id, ConstraintSet.TOP,
ConstraintSet.PARENT_ID, ConstraintSet.TOP, 0)
set.connect(holder.text_one.id, ConstraintSet.BOTTOM,
ConstraintSet.PARENT_ID, ConstraintSet.BOTTOM, 0)
set.applyTo(holder.constraintLayout)
}
将图像和text_two的可见性从变为不可见。因为您的父布局高度为wrap_content
。