解析XML时出错：格式不正确（无效标记）

Question

我是java编程新手，现在严格遵循一个教程。直到发生了一些我无法修复的事情时，我已经深入了解它。我搜索谷歌，一遍又一遍地查看代码，并没有看到任何错误。这里是我的代码截图.... nvm我不允许发布图片，因为我是新手，所以这里是代码复制。第一个X表示错误解析XML：没有正确形成（无效标记），第二个X表示XML文档结构必须在同一实体内开始和结束。我感谢所有的帮助，谢谢。

< ?xml version="1.0" encoding="utf-8"?> 
< LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" > 

    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/myMessage" 
     android:text="@string/hello" /> 

    <Button 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/myButton" 
     android:text="@string/answer" 
     /> 

< LinearLayout--------1st X is located here. The < is not spaced in the code but spaced here because that was the only way i could put it here 
    android:layout_width="fill_parent" 
    android:layout_height="20dp" 
    android:orientation="horizontal"> 


    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_weight="1" 
     android:gravity="center" 
     android:background="#ff0000" 
     android:textColor="#000000" 
     android:text="red" /> 
    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_weight="1" 
     android:gravity="center" 
     android:background="#00ff00" 
     android:textColor="#000000" 
     android:text="green" /> 
    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_weight="1" 
     android:gravity="center" 
     android:background="#0000ff" 
     android:textColor="#000000" 
     android:text="blue" /> 

<LinearLayout>---------2nd X is located here. The < is not spaced in the code but spaced here because that was the only way i could put it here and there is a/in between < and LinearLayout 

Answer 1

xml结构不好......下面是更正后的一个。 不应该有< LinearLayout &之间的空间此标记未正确关闭。

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:orientation="vertical"> 

<TextView 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:id="@+id/myMessage" 
    android:text="@string/hello" /> 

<Button 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:id="@+id/myButton" 
    android:text="@string/answer" 
    /> 

<LinearLayout 
android:layout_width="fill_parent" 
android:layout_height="20dp" 
android:orientation="horizontal"> 


<TextView 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:layout_weight="1" 
    android:gravity="center" 
    android:background="#ff0000" 
    android:textColor="#000000" 
    android:text="red" /> 
<TextView 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:layout_weight="1" 
    android:gravity="center" 
    android:background="#00ff00" 
    android:textColor="#000000" 
    android:text="green" /> 
<TextView 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:layout_weight="1" 
    android:gravity="center" 
    android:background="#0000ff" 
    android:textColor="#000000" 
    android:text="blue" /> 

</LinearLayout > 
</LinearLayout > 

Answer 2

你错过在底部有一个结束标记</LinearLayout>。在这里工作的一个`

<TextView 
    android:id="@+id/myMessage" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello" /> 

<Button 
    android:id="@+id/myButton" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/answer" /> 

<LinearLayout 
    android:layout_width="fill_parent" 
    android:layout_height="20dp" 
    android:orientation="horizontal" > 

    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_weight="1" 
     android:background="#ff0000" 
     android:gravity="center" 
     android:text="red" 
     android:textColor="#000000" /> 

    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_weight="1" 
     android:background="#00ff00" 
     android:gravity="center" 
     android:text="green" 
     android:textColor="#000000" /> 

    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_weight="1" 
     android:background="#0000ff" 
     android:gravity="center" 
     android:text="blue" 
     android:textColor="#000000" /> 
</LinearLayout> 

`

Answer 3

你不能让给予公开的标签和标签名之间的空间。给线性布局标签没有空间像

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" > 

这是错误的

< LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"> 

Answer 4

从<LinearLayout标签中的空格。使用<LinearLayout，而不是作为< LinearLayou

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" > 
<LinearLayout 
    android:layout_width="fill_parent" 
    android:layout_height="20dp" 
    android:orientation="horizontal"> 
    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/myMessage" 
     android:text="@string/hello" /> 

    <Button 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/myButton" 
     android:text="@string/answer" 
     /> 

    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_weight="1" 
     android:gravity="center" 
     android:background="#ff0000" 
     android:textColor="#000000" 
     android:text="red" /> 
    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_weight="1" 
     android:gravity="center" 
     android:background="#00ff00" 
     android:textColor="#000000" 
     android:text="green" /> 
    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_weight="1" 
     android:gravity="center" 
     android:background="#0000ff" 
     android:textColor="#000000" 
     android:text="blue" /> 
</LinearLayout> 
</LinearLayout>