android - Way to know if my application is installed -


is there way (intent) know if application installed ? followed below link, application don't intent when app installed

android - how intercept 'install application' intent

if want execute code app a, has installed (it's obvious, isn't it?), can't check app whether app app installed or not.

it's if want know when dead: after die, impossible know it. on other hand, else can know when die... same android scenario: app b can know whether app installed or not (by using getinstalledpackages or intents or whatever).


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