android - screenOrientation portrait 和 userPortrait 有什么区别

Question

我需要知道屏幕方向 userPortrait 和portrait 的真正区别。什么时候用什么？

什么时候？

 android:screenOrientation="portrait"

什么时候？

 android:screenOrientation="userPortrait"

Answer 1

"portrait"  Portrait orientation (the display is taller than it is wide).

和

"userPortrait"  

Portrait orientation, but can be either normal or reverse portrait based on the device sensor and the user's sensor preference. If the user has locked sensor-based rotation, this behaves the same as portrait, otherwise it behaves the same as sensorPortrait. Added in API level 18.

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