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That's just one set of my own.
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I am Hongchen, and I speak for myself.
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1. Set it in mainfest. Agree with the upstairs.
2. It can also be set in onstart or oncreate.
If you say setting up the system,This depends on how the system source code is configured,Remember it's not too clear,In it,There are a few functions that are based on some constants to set the settings of each horizontal and vertical screen。 You shouldn't be making a system, because no one manufacturer will make all the contents of the system die.
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5. Modify the vertical screen display when booting up.
In this case, the source needs to be modified and recompiled.
frameworks/base/core/res/res/values/
Before: 90
After: 0 Another: Set the orientation of the main window of the activity, the direction in the array will be set to the screenorientation property in the class, and the value of the screenorientation property must be the following constant value.
* Do not specify a direction, let the system decide the best direction for the activity.
* You want the activity to be displayed on the landscape screen, that is, the width of the landscape should be greater than the height of the portrait orientation, and the influence of the orientation sensor should be ignored.
*You want the activity to be displayed on the portrait screen, that is, the height of the portrait should be greater than the width of the landscape, and the influence of the orientation sensor should be ignored.
* Use the current preferred orientation of the user's device.
* Always maintain the same orientation as the screen, regardless of whether the activity is in the foreground or background.
*The direction of the activity is determined by the physical orientation sensor and is displayed in the direction in which the user rotates the device.
* Always ignore the judgment of the orientation sensor, when the user rotates the device, the display does not follow the rotation.
*I want the activity to be displayed on the landscape screen, but you can change it according to the direction indicated by the orientation sensor.
*I want the activity to be displayed on the portrait screen, but you can change it according to the direction indicated by the orientation sensor.
* Expect the activity to be displayed on the landscape screen, but in the opposite direction to the normal landscape screen.
*Expect the activity to be displayed on the portrait screen, but in the opposite direction of the normal portrait screen
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