隐藏标题栏需要使用预定义样式:android:theme= @android:style/Theme.NoTitleBar .
隐藏状态栏:android:theme= @android:style/Theme.NoTitleBar.Fullscreen .
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
android:versioncode="1"
android:versionname="1.0"
package="de.vogella.android.temperature"
>
<application
android:icon="@drawable/icon"
android:label="@string/app_name"
>
<activity
android:label="@string/app_name"
android:name=".Convert"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-sdk android:minsdkversion="9" />
</manifest>