Android Question I want my app to trigger a message telling the user that he needs the registration number.

[hears]

my app user have no internet, do not want use google service...

is here have offline License system for app ?

do you have any advice for this function?

 

[ronell]

you dont need to change font.. use default

 

[Erel]

Your question is a bit too generic. Are you selling the app through Google Play?
What is the purpose of the license system?

Do you want to send each customer a unique serial number?

 

[hears]

i want to send each customer a unique serial number,
this app not selling on google play.

my customer andriod equipment have no internet.

 

[DonManfred]

Again: You DONT need to change the Font. Even not making all BOLD!
Let the font default.

 

[hears]

changed

 

[An Schi]

How do you want your customers to recieve the number without internet?
SMS? Papermail? You could also email a file to their PC and then they copy&paste the file to a specific folder on the phone. Or you tell them the number and they write it into an edittext....

 

[hears]

yes,they can get License from another phone or PC,

I want to create an encrypted string based on a personal key,
I have get a unique device identifier,use PHONE libary,"android_id"

Dim p As Phone

MsgBox("The device's ID is: " & p.GetSettings("android_id"), "")

after how to lock a part of APP function ?

 

[Erel]

Getting unique id: https://www.b4x.com/android/forum/threads/14759/#content

You can use Email from the Phone library to send the id from the device app.
Reply with a string that is derived from the key and let the user copy and paste it in your app.