Understanding exact behaviour of UP button in android -


how button behave in android, mean check stack or manifest file , if need specify intent explicitly , use navigateupto go previous activity need of declaring parent in manifest file. example have main activity have activity b has parent defined in manifest file. have third activity c parent b defined in manifest file. when go c directly , press button of c can't understand why goes rather going b it's parent according manifest file. please reply. have searched 2 days now.


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