inital modification for Snote0

Change-Id: Ic8dc11c135786dd6c0b89e8f6acf4b9ac66574ca
fix null pointer exception

N/A

Change-Id: I69bf7a400b30c19bfcc6b0ee4d508f8ca1acdf09
Signed-off-by: mochangming <mochangming@xiaomi.com>