ConstraintLayout 动态设置子view_constraintlayout dynamic set subview height-优快云博客

此代码片段展示了如何在运行时动态地修改AndroidConstraintLayout中LinearLayout（llStartContent）的位置，将其约束设置为父视图的右侧，并清除左侧外边距。

<androidx.constraintlayout.widget.ConstraintLayout 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/ConstraintLayout "
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

<TextView
    android:id="@+id/tvTitle"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintTop_toTopOf="parent" />



    <LinearLayout
        android:id="@+id/llStartContent"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="@dimen/dp72"
        android:orientation="horizontal"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent">

       <TextView android:id="@+id/tvTitle" 
           android:layout_width="wrap_content" 
           android:layout_height="wrap_content"/>
    
    </LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>



代码动态设置 ConstraintLayout 子view 位置 
ConstraintLayout.apply{
    llStartContent.apply {
     val lp = layoutParams as ConstraintLayout.LayoutParams 
      lp.rightToRight = ConstraintLayout.LayoutParams.PARENT_ID
      lp.leftMargin = 0 
      layoutParams = lp 
   }
}