The default orientation can be set in the .xml file , and the android:screenOrientation attribute value in the activity is set in AndroidManifest.xml
The android:screenOrientation attribute has the following parameters: "landscape": landscape display (width is longer than height) "portrait": vertical screen display (height longer than width) For example the following settings android:screenOrientation="portrait" No matter how the phone changes, the activity with this property will be displayed vertically. android:screenOrientation="landscape", for landscape display. The above modification can also be set in Java code by code similar to the following setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE)