[移动开发]ConstraintLayout--控件边界重叠的解决思路

?例如水平向右的两控件，左边的控件要覆盖一部分到右边控件。

<androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/two_situation_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:visibility="visible">
        <ImageView
            android:id="@+id/iv_two_situation_left"
            android:layout_width="0dp"
            android:layout_height="20dp"
            android:src="@drawable/common_hui_m"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toLeftOf="@id/place_holder"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginLeft="12dp"
            android:adjustViewBounds="true"
            android:scaleType="fitXY"/>

        <View
            android:id="@+id/place_holder"
            app:layout_constraintLeft_toLeftOf="@id/iv_two_situation_right"
            app:layout_constraintTop_toTopOf="@id/iv_two_situation_right"
            app:layout_constraintBottom_toBottomOf="@+id/tv_two_situation_right"
            android:layout_marginLeft="7dp"
            android:layout_width="0dp"
            android:layout_height="0dp"/>

        <ImageView
            android:id="@+id/iv_two_situation_right"
            android:layout_width="0dp"
            android:layout_height="20dp"
            android:src="@drawable/common_green_b"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginRight="12dp"
            app:layout_constraintWidth_percent="0.1"
            android:adjustViewBounds="true"
            android:scaleType="fitXY"/>

    </androidx.constraintlayout.widget.ConstraintLayout>

关键是PlaceHolderView设置边距大小与边距对齐方式

   <View
            android:id="@+id/place_holder"
            app:layout_constraintLeft_toLeftOf="@id/iv_two_situation_right"
            app:layout_constraintTop_toTopOf="@id/iv_two_situation_right"
            app:layout_constraintBottom_toBottomOf="@+id/tv_two_situation_right"
            android:layout_marginLeft="7dp"
            android:layout_width="0dp"
            android:layout_height="0dp"/>