Question

eclipse linearlayout问题

输入<LinearLayout xmlns:android="http: （xx）//schemas.android.com/apk/res/android"
显示有错误
错误原因：
Wrong orientation? No orientation specified, and the default is horizontal, yet this layout has multiple children
where at least one has layout_width="match_parent"
这是怎么回事，如何解决
<LinearLayout xmlns:android="http:（xx）//schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_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"
tools:context="mars.activity.Activity01" >

Answer 1

Wrong orientation? No orientation specified, and the default is horizontal, yet this layout has multiple children

LinearLayout 布局是线性布局，需要设置orientation属性，表示是横向还是纵向

Answer 2

都是出现hello world ！因为布局文件一样。
求采纳为满意回答。

追问

用linearlayout显示错误啊，用相对布局就没事！后面是那段代码，再加上