Integrated NDK and Pass Code Feature

[mayank-kgp]

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  New feature of 4 digit pin #697 and NDK Integration #698

[mayank-kgp]

@therajanmaurya @puneetkohli521 Please review it.

[droidchef]

I suggest we clear Preferences related to pass code authentication when app is killed or after it stays in the background for X minutes and user returns.

[mayank-kgp]

@dilpreet96 Please see Ishan's suggestion.

[dilpreet2028]

@droidchef Are suggesting to show the passcode screen when he comes back to the application from app in background and when we turns on the screen after it was turned off ?

[droidchef]

@dilpreet96 Precisely yes!

For coming back from Background have a min threshold time, lets say 2 minutes or so because imagine I am using the app and suddenly get a call or have to answer someone on whatsapp, if I return back from there in a minute or 2 I shouldn't have to add the passcode, but if I am out for a time longer than that, you should ask me for my passcode.

[dilpreet2028]

Thanks for the clarification @droidchef , will be updating the PR soon.

[therajanmaurya]

@mayank-kgp Please add screen shots

[mayank-kgp]

@therajanmaurya @puneetkohli521 I have updated the GIF. For demo purpose, I have used 5 seconds for showing the passcode screen again if the app is in background. I am keeping 120 seconds in actual implementation as Ishan suggested.