stack - Android: Clear Activity History -


i've faced 1 problem - clearing activity history. have following consequence problem appears: 

a(splashscreen)->b(guestscreen)->c(screen signed users)->press home button->a->b->press button->c->press button->b->press button->exit app.

i tried different ways solve , found 1 quite strange solution throughout setting activities singleinstance , setting intent flags clear_top , new_task activities presenting strange(not normally, mean, firstly, there appears empty black screen actionbar , after ~1 second appears real layout) , bit delay said. didn't solution in spite of closes correctly , in correct consequences. now, i'm trying work without delay , strange black screen on moment. tried play intent flags clear_task, clear_top too. tried use cleartaskonlaunh root activity , finishonlaunch in manifest file others it`s necessary, doesn't help. how fix it?

edit:

trying set cleartaskonlaunch again. see next log when start app first time(a has called b without flags):

  main stack:     taskrecord{42610648 #869 }     intent { flg=0x10000000 cmp=/.activities.splashactivity }       hist #4: activityrecord{413cf8f8 /.activities.guestactivity}         intent { cmp=/.activities.guestactivity }         processrecord{414fdf60 15651:/10103}

// guest activity(b) calls useractivity(c):

    intent { flg=0x10000000 cmp=/.activities.splashactivity }   hist #3: activityrecord{415c86f0 /.activities.useractivity}     intent { cmp=/.activities.useractivity }     processrecord{414fdf60 15651:/10103}

//press home button , launch app again(a has called b):

    taskrecord{42610648 #869 cashongo.app.peachy} intent { flg=0x10000000 cmp=c/.activities.splashactivity }   hist #5: activityrecord{42127398/.activities.guestactivity}     intent { cmp=/.activities.guestactivity }     processrecord{414fdf60 15651:/10103}   hist #4: activityrecord{415c86f0 /.activities.useractivity}     intent { cmp=/.activities.useractivity }     processrecord{414fdf60 15651:/10103}

the same problem again, last activity in history. if press button i`ll useractivity.

i didn't understand question 100%

i think facing problem activity stack , clear_top

so use startactivityforresult instead of startactivity


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