Android Code Snippet Generate Unique Id on Android No permissions Needed.

Based on This StackOverflow

alternatives of IME

Sub GETUniqueID As String
Dim JO As JavaObject
Dim ID As String
JO.InitializeContext
ID = JO.RunMethod("getUniqueID", Null)
Log(ID)
Return ID
End Sub

#If Java
import android.media.MediaDrm;
import android.os.Build;
import android.content.*;
import java.util.*;

//private final Context context;
private String initialVal = "";


public String getUniqueID() {
   UUID wideVineUuid = new UUID(-0x121074568629b532L, -0x5c37d8232ae2de13L);
   try {
      MediaDrm wvDrm = new MediaDrm(wideVineUuid);
      byte[] wideVineId = wvDrm.getPropertyByteArray(MediaDrm.PROPERTY_DEVICE_UNIQUE_ID);
      Base64.Encoder enc = Base64.getEncoder();
      String encodedUid = enc.encodeToString(wideVineId);
      return encodedUid;
   } catch (Exception e) {
      return initialVal;
   }
}

#End If

Tested On Factory Reset And it keeps the same Value, Any Suggestions are welcome. Good Luck

 

[Erel]

Better to return "" instead of null;

 

[trepdas]

isn't that enough? (phone lib)

DeviceID = objPhone.GetSettings("android_id")

 

[Addo]

@trepdas after factory reset this android_id Will be changed, the code provided as I tested the value won't change after factory reset

 

[trepdas]

aha! Good to know that.

 

[Darknight20]

It is 100% unique for each device? user can change this?

 

[Addo]

I have tested the factory reset and it won't change you can do more test

 

[peacemaker]

I guess that

AddManifestText(<uses-feature android:name="android.hardware.TELEPHONY" android:required="true"/>)

is required ?

So the code snippet is not for WiFi tablets without GSM module ?

 

[Addo]

I guess that

AddManifestText(<uses-feature android:name="android.hardware.TELEPHONY" android:required="true"/>)

is required ?

So the code snippet is not for WiFi tablets without GSM module ?

this part is not required at all

private TelephonyManager tm; // = (TelephonyManager) BA.applicationContext.getSystemService(Context.TELEPHONY_SERVICE);

 

[asales]

I get this error when I tried the function in an app with MultiDex enabled:

java.lang.RuntimeException: Method: getUniqueID not found in: androidx.multidex.MultiDexApplication

 

[AscySoft]

MultiDex enabled:

In my case is working fine even with multidex on. It logs something like "sGctap+5zFz/eiyCZTkQaVv...." etc.

Another question: How to put this code into a module in order to call it from any activityes. I put both java and b4a code Inside a code module, and call it from activity main. it crush with the folowing message "java.lang.RuntimeException: Method: getUniqueID not found in: packagename.main"?

 

[Num3]

Another question: How to put this code into a module in order to call it from any activityes. I put both java and b4a code Inside a code module, and call it from activity main. it crush with the folowing message "java.lang.RuntimeException: Method: getUniqueID not found in: packagename.main"?

'Try Changing

Sub GETUniqueID As String

'To

Public Sub GETUniqueID As String

 

[Erel]

If you are adding this code to a class then change to:

Sub GETUniqueID As String
    Dim JO As JavaObject = Me
    Dim ID As String = JO.RunMethod("getUniqueID", Null)
    Log(ID)
    Return ID
End Sub

 

[AscySoft]

Public Sub GETUniqueID As String

Public or private, is the same thing.

If you are adding this code to a class

I have a huge code module with different useful stuff...so without a class, is it possible to add it to a code module? (as I know that "Code modules do not support Me keyword")

 

[Erel]

Code modules have many limitations. Better to use a class.

Change this Java line:
public String getUniqueID()

To
public static String getUniqueID()

Untested code:

Sub GETUniqueID As String
    Dim JO As JavaObject
    JO.InitializeStatic(Application.PackageName & ".modulenamelowercased")
    Dim ID As String = JO.RunMethod("getUniqueID", Null)
    Log(ID)
    Return ID
End Sub

 

[Daniel44]

Code modules have many limitations. Better to use a class.

Change this Java line:
public String getUniqueID()

To
public static String getUniqueID()

Untested code:

Sub GETUniqueID As String
    Dim JO As JavaObject
    JO.InitializeStatic(Application.PackageName & ".modulenamelowercased")
    Dim ID As String = JO.RunMethod("getUniqueID", Null)
    Log(ID)
    Return ID
End Sub

It doesn't work, neither as the author says nor as Erel indicated. What am I doing wrong? Im testing on Bluestack

 

[Addo]

Test it on real device. Emulators won't return any value it will be null..

 

[Addo]

better version that returns the id as byte

#If Java
import android.media.MediaDrm;
import android.content.*;
import java.util.*;
import java.io.*;

 

 public byte[] getUniqueID() {
   UUID wideVineUuid = new UUID(-0x121074568629b532L, -0x5c37d8232ae2de13L);
   try {
      MediaDrm wvDrm = new MediaDrm(wideVineUuid);
      byte[] wideVineId = wvDrm.getPropertyByteArray(MediaDrm.PROPERTY_DEVICE_UNIQUE_ID);
      return wideVineId;
   } catch (Exception e) {
      // Inspect exception
      return null;
   }
   //
}

 

#End If

usage

Dim devid() As Byte
Dim su As StringUtils

devid = nativeMe.RunMethod("getUniqueID", Null)

If devid = Null Then
log("no id found")
return
end if

log(su.EncodeBase64(devid))

this code will work in devices that have a google services . on devices doesn't have google in it will return null

 

[KapiteinOllie]

What do I wrong? I have created clean B4XPages project and insert the code into it. When I run it on the phone it crashes:

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create (first time) **
*** mainpage: B4XPage_Created
*** mainpage: B4XPage_Appear
** Activity (main) Resume **
b4xmainpage_button1_click (java line: 61)
java.lang.RuntimeException: Method: getUniqueID not found in: b4a.example.main
at anywheresoftware.b4j.object.JavaObject$MethodCache.getMethod(JavaObject.java:363)
at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:120)
at b4a.example.b4xmainpage._button1_click(b4xmainpage.java:61)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:221)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:201)
at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
at android.view.View.performClick(View.java:7146)
at android.view.View.performClickInternal(View.java:7119)
at android.view.View.access$3500(View.java:803)
at android.view.View$PerformClick.run(View.java:27533)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7386)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:980)

When I create a Default project, insert the code and run it. I works and get result.

I ran the projects on the same phone.

 

[Erel]

Change
public String getUniqueID() {
to
public static String getUniqueID() {