Android:screenorientation
The direction the activity displays in the screen. The property value can be one of the values listed in the following table:
"unspecified
"
Default value, the system selects the direction. Its use policy, and because of the specific context of the selection, may vary depending on the device.
"user
"
Use the user's current preferred orientation.
"behind
"
Use the same direction in the activity stack as the activity under that activity.
"landscape
"
Horizontal display (width is larger than height)
"portrait
"
Portrait display (height is larger than width)
"reverseLandscape
"
In contrast to the normal horizontal direction, it is introduced in API level 9.
"reversePortrait
"
In contrast to the normal longitudinal direction, it is introduced in API level 9.
"sensorLandscape
"
Horizontal display, but based on the device sensor, can be displayed in normal direction, or reverse display, in the API Level 9 is introduced.
"sensorPortrait
"
Vertical display, but based on the device sensor, can either be displayed in normal direction, or reverse display, in the API Level 9 is introduced.
"sensor
"
The direction of the display is determined by the direction sensor of the device. The display direction depends on how the user holds the device, and the direction of the display changes when the user rotates the device. However, by default, some devices do not rotate in all four directions, so to allow rotation in all four directions, use the Fullsensor property value.
"fullSensor
"
The direction of the display (4 directions) is determined by the direction sensor of the device, except that it allows the screen to have 4 display orientations, and the other is similar to when set to "sensor", which is usually done regardless of the device. For example, some devices typically do not use portrait or landscape inversion, but this setting will still cause such reversals. This value is introduced in API level 9.
"nosensor
"
The display direction of the screen does not refer to the physical direction sensor. The sensor is ignored, so the display does not rotate because the user is moving the device. In addition to this difference, the system rotates the orientation of the screen with the same policy as the "unspecified" setting.
Note: When the value set for this property is "landscape" or portrait, consider the direction that the hardware will require for the activity to run. Because of this, the values of these claims can be filtered by services such as Google Play so that applications can only be applied to devices that support the direction required by the activity. For example, if you declare "Landscape", "reverselandscape", or "Sensorlandscape", the application can only be applied to devices that support landscape display. However, you should also use the <uses-feature> element to explicitly declare whether all the screen orientations of the application are vertical or horizontal. For example: <uses-feature android:name= "android.hardware.screen.portrait"/>. This setting is purely filtered by Google Play, and the platform itself does not control whether the application can be followed when the device supports only a particular orientation.
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