screenOrientation portrait和userPortrait有什么区别

Lib*_*bin 13 android android-orientation

我需要知道的真正的区别screen orientation userPortraitportrait.什么时候用?

什么时候?

 android:screenOrientation="portrait"
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什么时候?

 android:screenOrientation="userPortrait"
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Saj*_*ath 13

"portrait"  Portrait orientation (the display is taller than it is wide).
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"userPortrait"  
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纵向,但可以是基于设备传感器和用户传感器首选项的正常或反向纵向.如果用户已锁定基于传感器的旋转,则其行为与纵向相同,否则其行为与sensorPortrait相同.在API级别18中添加.

请查看http://developer.android.com/guide/topics/manifest/activity-element.html