Revert "Revert "Revert "UI of MianActivity"""

This reverts commit eed2feb9987399e3cb63858a4679b69e2605cbf8.
Revert "Revert "Revert "Revert "UI of MianActivity""""

This reverts commit a67995b1f0d558f6e552adb04e840617298c4953.