android - When writing a mobile app, is there way to have the app automatically download another specified app? -

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i have idea mobile app (call app) use qr codes. won't go details, because of way implemented, huge, huge benefit user not have install app plus qr scanning app. crap download. before decide invest anymore thought idea, i'd know whether or not possible have installation code following:

user downloads app  app checks see if qr scanner given list of possible scanners on user's phone.  if yes:      nothing  else:      download , install qr scanner (after prompting user)

i have 0 experience mobile apps, either in development or usage, sorry if stupid question.

while there no mechanism install 1 application (besides loading appropriate app store), can use free (apache license 2.0) library, zxing, embed qr code processing ios and/or android application.


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