问题解决frameworks/base/services/core/java/com/android/server/wm/DisplayPolicy.javaprivate int updateSystemBarsLw(WindowState win, int disableFlags) { final boolean dockedRootTaskVisible = mDisplayContent.getDefaultTaskDisplayArea() .isRootTaskVisible(WINDOWING_MODE_SPLIT_SCREEN_PRIMARY); final boolean resizing = mDisplayContent.getDockedDividerController().isResizing(); // We need to force system bars when the docked root task is visible, when the freeform // root task is focused but also when we are resizing for the transitions when docked // root task