如何重新使用横向和纵向布局?
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:layout_width="match_parent"
android:layout_height="match_parent" >
<fragment
android:id="@+id/userFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout="@layout/user_fragment" />
</android.support.constraint.ConstraintLayout>