How to obtain Phone Number in Android?

Question

This is an extension to the question here. Now I quote CommonsWare

There is no reliable way to retrieve mobile number of device programatically. The only option remaining and I can think of is getting user to input for the phone number.

My question is how to check if the phone number entered by the user is correct for these and any more possibilities which I cannot think now:

1. The number entered by the user is of the same device the app has been downloaded on.
2. User did not make any typographical error while entering the number
3. User did not enter any local calling code like leading 0

I have spend sufficient time on StackOverflow and web and this is not a duplicate question.

I will appreciate any help, clues or suggestions.

Answer 1

1.The number entered by the user is of the same device the app has been downloaded on.

Again this is something kind of impossible to test, else the Tricky way mentioned by @neteinstein

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2.User did not make any typographical error while entering the number

3.User did not enter any local calling code like leading 0

I think you still not aware of this library by google,used for Parsing/formatting/validating phone numbers for all countries/regions of the world.

Using that you can achive your other 2 solutions.I think.

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Link : http://code.google.com/p/libphonenumber/