1. With App Lifecycle 應用程式重裝前都不會改變
2. With Andoird OS Profile Lifecycle 作業系統Reset to factory前都不會改變

@SuppressLint("HardwareIds")
    private fun getHardwareId() : String {
        var output = Settings.Secure.getString(contentResolver, Settings.Secure.ANDROID_ID)
        if(output == "") {
            val pref = this.getSharedPreferences("HardwareIds", Context.MODE_PRIVATE)
            output = pref.getString("hardware_id","").orEmpty()
            if(output == "") {
                output = UUID.randomUUID().toString()

                val editor = pref.edit()
                editor.putString("hardware_id", output)
                editor.apply()
            }
        }
        return output
    }