android - Remove just last instance of an activity from stack -

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i have application 2 activities , b, main activity , b called can called b itself.

so stack like

a,b0,b1,b2,b3

in cases want able remove last instance of b, [android:nohistory="true"] won't work.

a,b0,b1,b2,b3 => a,b0,b1,b2,b4

how can accomplish this?

the below lines finish activity in working , start same activity:

 finish();  startactivity(getintent());

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