java - is it possible to cycle multiple sub activities on android -

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is possible code this, have main activity 1 start button , ten sub activities, run countdown timer , show picture, ten different picture , time, when click has run a1 a2, a1 , a2 again, a1, a3, a4 , a5 , a4 again, , on,i added flow chart below

flow chart of main activity , ten sub activities

there no such thing "subactivity" in android. activities can started @ time, other activity. want easy enough, need each activity other a1 activate a1 after timer, , need a1 keep track of last/next activity activated was, knows 1 activate next on its timer.


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