很神奇的问题，把源代码仔细检查了一遍没发现什么问题，代码是从网上copy的样例代码，应该不会有bug。
然后重新从网上复制粘贴了一把就好了，很让我无语。可能是Eclipse抽风了。
附上一篇网上找到的一篇关于此问题不错的帖子，还不错，供参考
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[解决方案]Unexpected namespace prefix “xmlns” found for tag Layout
形如这样的代码，出现Error：
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/background" >
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView android:id="@+id/menu_top_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/name_version"
android:textColor="@color/black"
android:textSize="20sp" />
Error:"Unexpected namespace prefix"xmlns" found for tag LinearLayout". I tried the solutions provided in other similar questions also but it didn't work for me. Same error is occurr.
Solution:
Please try following:
1.Remove "?xml version="1.0" encoding="utf-8"?" line from the top.
2.Remove "xmlns:android="http://schemas.android.com/apk/res/android" from all the place excluding the ScrollView. I believe it is sufficient to inform it to the application once.
去掉 第二个"xmlns:android="http://schemas.android.com/apk/res/android"
That's All Thanks!
