What happens next when the device switches between portrait and landscape?

  1. When the android: configChanges of the Activity is not set, the cut screen will re-call each life cycle, it will be executed once when the horizontal screen is cut, and it will be executed twice when the vertical screen is cut
  2. When the android: configChanges = "orientation" of the Activity is set, The screen cut will still call each life cycle again. It will only be executed once when the screen is cut horizontally or vertically.
  3. When setting the android: configChanges = "orientation | keyboardHidden" of the Activity, the screen cut will not re-call each life cycle, only onConfigurationChanged will be executed method

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