Xamarin.Android:加载 supprt.v7.toolbar 时的 IllegalArgumentExcep

Question

我在编辑其中一个xaml文件后加载supprt.v7.toolbar时收到IllegalArgumentException。

这是编译器告诉我的

Creating class loader with 0 projects
Creating LibraryClassLoader in shadow copy path C:UserskonnoAppDataLocalTempAndroidDesignerJars180644833948983183
Trying to load class android.support.v7.widget.Toolbar
mono.android.DesignerException: java.lang.IllegalArgumentException
at mono.android.DesignerException.fromThrowable(DesignerException.java:46)
at mono.android.DesignerSession.checkRenderResultForError(DesignerSession.java:187)
at mono.android.DesignerSession.load(DesignerSession.java:239)
at mono.android.DesignerSession.processMessage(DesignerSession.java:704)
at mono.android.MessageListener.executeMessage(MessageListener.java:88)
at mono.android.MessageListener$Runner.run(MessageListener.java:44)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: column indices (start + span) mustn't exceed the column count. 
at android.widget.GridLayout.handleInvalidParams(GridLayout.java:823)
at android.widget.GridLayout.checkLayoutParams(GridLayout.java:837)
at android.widget.GridLayout.checkLayoutParams(GridLayout.java:853)
at android.view.ViewGroup.addViewInner(ViewGroup.java:4462)
at android.view.ViewGroup.addView(ViewGroup.java:4295)
at android.view.ViewGroup.addView(ViewGroup.java:4267)
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:862)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:70)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:834)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:324)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:429)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:368)
at mono.android.DesignerSession.load(DesignerSession.java:233)
... 4 more

我对工具栏所做的唯一一件事就是更改它所在的行。然后在设计器中重新打开它后，我得到了上面的错误。我尝试删除已添加到工具栏的代码行，但错误仍然存在。

活动的 XAML 代码

<?xml version="1.0" encoding="utf-8"?>
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:columnCount="3"
    android:rowCount="6">
<!--This is for the Toolbar Only-->
    <android.support.v7.widget.Toolbar
        android:id="@+id/RestaurantTotalToolbar"
        android:minHeight="?android:attr/actionBarSize"
        android:layout_row="0"
        android:background="@color/colorPrimary"
        android:theme="@style/ToolbarStyle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
<!--This is for the Toolbar Only-->
<!--What is the Ticket Total? -->
    <TextView
        android:text="@string/questTicketTotal"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:id="@+id/questTicketTextView"
        android:layout_row="1"
        android:layout_column="0"
        android:layout_columnSpan="3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="fill_horizontal"
        android:gravity="center"
        android:layout_rowWeight="10" />
    <EditText
        android:hint="$0.00"
        android:id="@+id/ticketTotal"
        android:layout_row="2"
        android:layout_column="0"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:gravity="center"
        android:height="50dp"
        android:layout_columnSpan="3"
        android:layout_rowWeight="1"
        android:translationY="-60dp"
        android:maxLength="5"
        android:inputType="numberDecimal"
        android:maxLines="1" />
<!--What is the name of the Restaurant? -->
    <TextView
        android:text="@string/questRestaurantName"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:id="@+id/restaurantNameTextView"
        android:layout_row="3"
        android:layout_column="0"
        android:layout_columnSpan="3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="fill_horizontal"
        android:gravity="center"
        android:layout_rowWeight="10"
        android:translationY="-35dp" />
    <EditText
        android:hint="Restaurant Name"
        android:id="@+id/restaurantName"
        android:layout_row="4"
        android:layout_column="0"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:gravity="center"
        android:height="50dp"
        android:layout_width="wrap_content"
        android:layout_columnSpan="3"
        android:layout_rowWeight="1"
        android:translationY="-100dp"
        android:inputType="text"
        android:singleLine="true"
        android:maxLines="1" />
    <Button
        android:text="@string/nextButton"
        android:id="@+id/calcButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_row="5"
        android:layout_column="2"
        android:layout_columnSpan="3"
        android:layout_gravity="right"
        android:layout_marginBottom="5dp"
        android:layout_marginRight="5dp" />
</GridLayout>

Answer 1

工具栏不是导致问题的原因。'android：layout_columnSpan="3"' 导致了问题，因为按钮设置在第 2 列中，而我试图将其范围设置为 3，但它无法做到。

对按钮代码的此更改解决了此问题

android:layout_column="0"
android:layout_columnSpan="3"