5 Your TabHost must have a TabWidget whose id attribute is 'android.R.id.tabs'
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1.错误提示:Your content must have a ListView whose id attribute is 'android.R.id.list'
对于以上错误,其实可能是因为我们要实现对ListView中setOnItemClick的事件监听而去继承了LiseActivity,但是却没有ListView的标签,只要在布局文件中添加定制Layout的代码,即将ListView的id设置为“@android:id/list”或android:id="@id/android:list",这时可以用getListView来获取ListView的对象了。
xml代码如下:
[html] view plaincopy <ListView
android:id="@android:id/list" 或android:id="@id/android:list"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</ListView>
2.同样容易报此错误的还有TabHost,如下:
问题1.
添加Layout的时候,xml跟元素选择TabHost, 但是ADT没有添加id属性, 运行的时候,会提示Your content must have a TabHost
whose id attribute is ‘android.R.id.tabhost’错误, 需要添加android:id=”@android:id/tabhost”, 这样就可以了。
问题2. 运行Activity的时候出现Your TabHost must have a TabWidget whose id attribute is ‘android.R.id.tabcontent’
解决方法: 修改FrameLayout添加id属性, ADT自动生成的xml文件中Id是android:id=”@+id/FrameLayout01 ”, 需要修改成下
面的格式android:id=”@android:id/tabcontent ”,这个估计会困扰一大批初学者,谁会想到会修改这个地方,看到错误很容易
修改成tabcontent,但是前缀不容易想到。 而且在ADT可视化编辑这个文件的时候, 界面上显示NullPointerException,这个是
ADT的一个BUG。
修改后的xml如下:
<?xml version=”1.0″ encoding=”utf-8″?>
<TabHost
android:id=”@android:id/tabhost”
xmlns:android=”http://schemas.android.com/apk/res/android”
android:layout_width=”fill_parent” android:layout_height=”fill_parent”>
<LinearLayout android:id=”@+id/LinearLayout01″ android:layout_height=”fill_parent”
android:layout_width=”fill_parent” android:orientation=”vertical”>
<TabWidget android:id=”@android:id/tabs” android:layout_height=”wrap_content”
android:layout_width=”fill_parent”>
</TabWidget>
<FrameLayout android:id=”@android:id/tabcontent” android:layout_width=”fill_parent”
android:layout_height=”fill_parent”>
</FrameLayout>
</LinearLayout>
</TabHost>
注意: 如果用TabHost的话, 上面标红的三处必须是一样, 这个是Google的约定。
- 5 Your TabHost must have a TabWidget whose id attribute is 'android.R.id.tabs'
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