问为什么此布局在预览版中工作，而在我的设备上却不起作用？

EN

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="de.seschi98.trgapp.activities.ScheduleActivity"
    tools:showIn="@layout/activity_schedule">



    <android.support.v7.widget.CardView
        android:id="@+id/card_view"
        android:layout_width="match_parent"
        android:layout_height="120dp">


        <GridLayout
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:columnCount="4"
            android:rowCount="1"
            android:columnOrderPreserved="false"
            android:orientation="horizontal"
            android:rowOrderPreserved="false">

            <TextView
                android:id="@+id/lesson_number"
                android:text="01"
                android:textSize="22dp"
                android:layout_width="wrap_content"
                android:layout_column="0"
                android:layout_row="0"
                android:layout_rowWeight="1"
                android:gravity="center_vertical|center_horizontal"
                android:textStyle="bold"
                android:layout_columnWeight="20" />

            <GridLayout
                xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_column="1"
                android:layout_row="0"
                android:columnCount="2"
                android:layout_columnWeight="90"
                android:rowCount="3"
                android:layout_height="match_parent">


                <TextView
                    android:gravity="center_vertical|center_horizontal"
                    android:id="@+id/lesson_name"
                    android:text="Chemistry"
                    android:textSize="22dp"
                    android:layout_height="wrap_content"
                    android:layout_column="1"
                    android:layout_row="0"
                    android:layout_rowWeight="15"
                    android:layout_gravity="center_horizontal"
                    android:paddingTop="10dp"
                    android:layout_width="match_parent" />

                <TextView
                    android:gravity="bottom|center_horizontal"
                    android:id="@+id/teacher"
                    android:text="Mr Smith"
                    android:layout_height="wrap_content"
                    android:textSize="16dp"
                    android:layout_column="1"
                    android:layout_row="1"
                    android:layout_rowWeight="20"
                    android:layout_gravity="center_horizontal"
                    android:layout_width="match_parent" />


                <TextView
                    android:gravity="top|center_horizontal"
                    android:id="@+id/room"
                    android:text="Room A-123"
                    android:textSize="16dp"
                    android:layout_height="wrap_content"
                    android:layout_column="1"
                    android:layout_row="2"
                    android:layout_rowWeight="20"
                    android:layout_gravity="center_horizontal"
                    android:layout_width="match_parent" />


            </GridLayout>

            <View android:layout_row="0"
                android:layout_column="2"
                android:layout_height="match_parent"
                android:layout_width="0dp"
                android:layout_columnWeight="15">

            </View>

            <View android:layout_row="0"
                android:id="@+id/badge"
                android:layout_column="3"
                android:layout_height="match_parent"
                android:layout_width="0dp"
                android:background="#c0392b"
                android:layout_columnWeight="5">

            </View>


        </GridLayout>

    </android.support.v7.widget.CardView>

</LinearLayout>