> For the complete documentation index, see [llms.txt](https://ftcoders.first-tech.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ftcoders.first-tech.com/first-tech-ttp-sdk/developer-zone/migrating-versions/upgrading-from-version-1.0.22-to-version-1.0.25v19.md).

# Upgrading from version 1.0.22 to version 1.0.25v19

In version 1.0.22 and earlier, in order to initialize the SDK it was necessary to extend the `TapOnPhoneApplication` class. This class, in turn, extended `Application()`, and many applications have their own class that extends `Application()`. As Android doesn't allow multiple inheritance of Application, this could cause an error in the application, as two Application classes were being extended. To fix this, we no longer require `TapOnPhoneApplication()` to be extended, but we now require it to be initialized with the `TapOnPhoneInitializer` class.

Below is how the implementation was done in version 1.0.22 and earlier.

```
class Application : TapOnPhoneApplication() {
    override val terminalConfig = TerminalConfigEntity(
        companyDocument = BuildConfig.COMPANY_DOCUMENT,
        companyName = BuildConfig.COMPANY_NAME,
        merchantId = UUID.fromString(BuildConfig.MERCHANT_ID),
        terminalNumber = BuildConfig.TERMINAL_NUMBER,
        clientId = BuildConfig.CLIENT_ID,
        clientSecret = BuildConfig.CLIENT_SECRET
    )
}
```

As of version 1.0.25v19, the implementation is as follows:

```
class Application : Application() {
​
    override fun onCreate() {
        super.onCreate()
​
        if (!TapOnPhoneInitializer.isApplicationInitAllowed(this)) return
​
        TapOnPhoneInitializer.initializeTerminal(this)
​
        TapOnPhoneInitializer.setTerminalConfig(
            TerminalConfigEntity(
                companyDocument = BuildConfig.COMPANY_DOCUMENT,
                companyName = BuildConfig.COMPANY_NAME,
                merchantId = UUID.fromString(BuildConfig.MERCHANT_ID),
                terminalNumber = BuildConfig.TERMINAL_NUMBER,
                clientId = BuildConfig.CLIENT_ID,
                clientSecret = BuildConfig.CLIENT_SECRET,
                sdkScope = BuildConfig.SDK_SCOPE,
                sdkClientId = BuildConfig.SKD_CLIENT_ID,
                sdkClientSecret = BuildConfig.SDK_CLIENT_SECRET,
                appVersion = "1.0.0",
                packageName = applicationContext.packageName,
                sdkOrganization = "Organization 123",
                versionCode = (if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
                    packageManager.getPackageInfo(packageName, 0).longVersionCode
                } else {
                    packageManager.getPackageInfo(packageName, 0).versionCode.toLong()
                }).toString()
            )
        )
    }
}
```


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