Android app cloning prevention for app cloning

Question

An application was created that uses a unique device identifier, which is extracted from the following code fragment

String deviceId = Settings.Secure.getString(getContentResolver(),
            Settings.Secure.ANDROID_ID);

When a user tries to clone an application by cloning an application, he creates a different device identifier and the application cannot work

Is there a way to make our application non-clonable or

Any possible way to have the same device, even if the application instance is cloned?

Is there a way to find out if the application is running in a cloned instance?

Answer 1

Applications such as Cloner usually change the package name of the application so that you can get the package name and see if it has changed or not.

if (!context.getPackageName().equals("your.package.name")){
    // close the app or do whatever
}

apk, , , . :

@SuppressLint("PackageManagerGetSignatures")
public static int getCertificateValue(Context ctx){
    try {
        Signature[] signatures = null;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
            try {
                signatures = ctx.getPackageManager().getPackageInfo(ctx.getPackageName(), PackageManager.GET_SIGNING_CERTIFICATES).signingInfo.getApkContentsSigners();
            }catch (Throwable ignored){}
        }
        if (signatures == null){
            signatures = ctx.getPackageManager().getPackageInfo(ctx.getPackageName(), PackageManager.GET_SIGNATURES).signatures;
        }
        int value = 1;

        for (Signature signature : signatures) {
            value *= signature.hashCode();
        }
        return value;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return 0;
}

public static boolean checkCertificate(Context ctx, int trustedValue){
    return getCertificateValue(ctx) == trustedValue;
}

getCertificateValue(context) , , , .

PS: @vladyslav-matviienko, , , . .