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I'm trying to make an app which will check the face of the user by using the front camera the first time it is launched and then save how that face looks.
After that, every time someone starts the app it will check if his or her face is similar to the one that the app saved on its first launch, and if it's similar, proceed, if not, quit.
I know that there is face recognition unlock for Android, so I hope it's possible.
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I am a beginner in programming Android applications in Java. I want to know how to control or change something, for example, cut off the Internet on another application. Is there a way or suggestion. Thank you
I don't think it's possible unless you are the developer of both and remove the permission for both apps, see: Can an app give its permission to another application in android?
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Idea of app: it is something like Google Photos.
App which listens when user take a photo with his camera app, and send this photo to server.
How can we know when user take a photo? I think that it is something like Listener "onUserTookPhotoListener", isn't it?
Infinity cycle checking gallery on background?
You can use FileObserver. It works for files and directories. You will need to implement service though.
Please take a look at questions and answers that can be helpful:
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I would like to add a feature to my android game that would let the user unlock a character by watching a video ad. The games based on Java. How could I do this?
Take a look at the Google Mobile Ads, also known as AdMob. Here is a tutorial to get you going.
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I want to create a tutorial for my app that will show the user how to use it. For example when you first run an android device it teaches you how to use the system.
I want my tutorial to just tell the user to swipe the screen to the left and then click on a button.
Check out the ShowcaseView library on Github. I guess that'll fit your needs.
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I'm creating an android application I wish to release commercially. Before doing so I would like to release a beta. What methods can I use to cause the beta to expire/become unusable after 12 weeks?
You can simply check if the current date is not larger then the expiry date, eventually checking it with internet time server. And make sure you save each time you check it to the preferences, so the user has no use in rewinding time.
Anyway, you can expect that if somebody really wants to hack your app he can do it. So it's no use to completely focus on avoiding that.