samsung dont have a msg hide function it hide content if you lock the
phone but if you on it not hide the content and show on top of screen so
improvment there so that niotification show on the top about msg but
dont show the content in it.... becaus...
there is not instant lock option after existing the app there should be
instant app lock there but it lock the app when phone get lock... so to
keep in mind the custmers privacy you should develop instant app lock