我想按照这个教程：的http：//开发商。 android.com/training/basics/firstapp/building-ui.html 因为我是新来开发Android，这是我的activity_main.xml中文件看起来是这样的：

I am trying to follow this tutorial : http://developer.android.com/training/basics/firstapp/building-ui.html as I am new to android developing and this is what my "activity_main.xml" file looks like :

<?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="horizontal">

<EditText android:id="@+id/edit_message"
    android:layout_weight="1"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:hint="@string/edit_message" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/button_send" />

当我点击运行，我得到一个错误，指出没有XML内容，请添加到您的文档根视图或布局。我注意到有一个名为activity_main.out.xml生成一个新文件。什么可能我是做错了？

When I click run I get an error that says "No XML content. Please add a root view or layout to your document." and I noticed there is a new file generated called "activity_main.out.xml". What could I be doing wrong?

推荐答案

Eclipse正在运行XML不是你的活动。如果previous解决方案不工作，然后删除 actvity_main_out.xml 和运行应用程序不是XML。

Eclipse is running the XML not your activity. If previous solution doesn't work then delete actvity_main_out.xml and run the app not XML.