Device unique ID that be persistent while not using device info

Question

I used device information to create unique ID for android device but after i read Security Tips of google, want to change it somehow.

Quote from Google:

If it's possible to design your application in a way that does not require any permissions, that is preferable. For example, rather than requesting access to device information to create a unique identifier, create a GUID for your application.

How can i have a Unique ID for a Device that doesn't change next time app runs or device reboot?

Community · Accepted Answer · 2017-05-23 11:54:55Z

2

You can use below method:

Settings.Secure.getString(getContentResolver(), Settings.Secure.ANDROID_ID)

that returns unique android id. and don't need any permissions.

Also you can check this link.

edited May 23, 2017 at 11:54

CommunityBot

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answered Apr 9, 2017 at 6:50

Ahmad Vatani

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4 Comments

Mehran Zamani Over a year ago

Settings.Secure.ANDROID_ID is indeed device info!

Mehran Zamani Over a year ago

oh, i see. you are right but i think it isn't unique and there is a small chance that 2 android IDs be the same. and also: When a device has multiple users (available on certain devices running Android 4.2 or higher), each user appears as a completely separate device, so the ANDROID_ID value is unique to each user.

Firnaz Over a year ago

But during factory reset, this ID will get changed right ?

Ahmad Vatani Over a year ago

Maybe @Firnaz !!! Also it's known to be null sometimes and documented as "can change upon factory reset". Use at your own risk, and I should say it can be easily changed on a rooted phone

Frankenxtein · Accepted Answer · 2017-04-09 08:02:29Z

0

you can use IMEI number which is unique to every phone but you need to ask

<uses-permission android:name="android.permission.READ_PHONE_STATE" />

during runtime above api 23 and above.

answered Apr 9, 2017 at 8:02

Frankenxtein

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2 Comments

Mehran Zamani Over a year ago

so what do you think about google post? is it possible to have unique ID without problem and not using permissions?

Frankenxtein Over a year ago

using Settings.Secure.getString(getContentResolver(), Settings.Secure.ANDROID_ID) can give you unique id without having to ask for permission but from what i know, this value may change upon factory reset.

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