去掉所有Activity界面标题栏、强制横屏竖屏

一、去掉所有Activity界面的标题栏
修改AndroidManifest.xml

在application 标签中添加android:theme=”@android:style/Theme.NoTitleBar”

二、去掉所有Activity界面的TitleBar 和StatusBar
修改AndroidManifest.xml

< application
                 android:icon ="@drawable/ic_launcher"
                 android:label ="@string/app_name"         android:theme ="@android:style/Theme.NoTitleBar.Fullscreen"
>

三、强制竖屏、横屏

修改AndroidManifest.xml
在每一个Activity标签中添加android:screenOrientation=”landscape”强制横屏

< activity
                         android:label ="@string/app_name"
                         android:name =".MainActivity"
                     android:screenOrientation ="landscape"
                         >

添加android:screenOrientation=”portrait”强制竖屏

< activity
                         android:label ="@string/app_name"
                         android:name =".MainActivity"
                         android:screenOrientation ="portrait"
                         >