Upgrade and Downgrade in Google

When upgrading or downgrading a subscription, you can set the update policy, or how the change affects your subscribers. The following table lists available update policies:

Name	Description
`ChargeFullPrice`	The new plan takes effect immediately, and the user is charged full price of new plan and is given a full billing cycle of subscription, plus remaining prorated time from the old plan.
`ChargeProratedPrice`	The new plan takes effect immediately, and the billing cycle remains the same.
`WithTimeProration`	The new plan takes effect immediately, and the remaining time will be prorated and credited to the user.
`Deferred`	The new purchase takes effect immediately, the new plan will take effect when the old item expires.
`WithoutProration`	The new plan takes effect immediately, and the new price will be charged on next recurrence time.

Upgrading, downgrading, or changing a subscription on Google Play Store requires calling the updatePurchase function.

See Google Play Documentation for more details.

Use Qonversion SDK for upgrading, downgrading, or changing Google Play Store subscription:

final QPurchaseOptions purchaseOptions = new QPurchaseOptions.Builder()
        .setOldProduct(oldProduct)
        .build();
Qonversion.getSharedInstance().purchase(this, newProduct, purchaseOftions, new QonversionEntitlementsCallback() {
    @Override
    public void onSuccess(@NotNull Map<String, QEntitlement> entitlements) {
        QEntitlement premiumEntitlement = entitlements.get("premium");

        if (premiumEntitlement != null && premiumEntitlement.isActive()) {
            // Handle active entitlement here
        }
    }

    @Override
    public void onError(@NotNull QonversionError error) {
        // Handle error here
    }
});

val purchaseOptions = QPurchaseOptions.Builder()
    .setOldProduct(oldProduct)
    .build()
Qonversion.shared.purchase(this, newProduct, purchaseOptions, callback = object: QonversionEntitlementsCallback {
    override fun onSuccess(entitlements: Map<String, QEntitlement>) {
        val premiumEntitlement = entitlements["premium"]
        if (premiumEntitlement != null && premiumEntitlement.isActive) {
            // Handle active entitlement here
        }
    }

    override fun onError(error: QonversionError) {
        // Handle error here
    }
})

try {
  final QPurchaseUpdateModel purchaseUpdateModel = product.toPurchaseUpdateModel('oldProductId');
  final Map<String, QEntitlement> entitlements = await Qonversion.getSharedInstance().updatePurchase(purchaseUpdateModel);
} catch (e) {
  print(e);
}

try {
  const purchaseUpdateModel: PurchaseUpdateModel = product.toPurchaseUpdateModel('oldProductId');
  const entitlement: Map<string, Entitlement> = await Qonversion.getSharedInstance().updatePurchase(purchaseUpdateModel);
} catch (e) {
  console.log(e);
}

PurchaseUpdateModel purchaseUpdateModel = product.ToPurchaseUpdateModel("oldProductId");
Qonversion.GetSharedInstance().UpdatePurchase(purchaseUpdateModel, (entitlements, error, isCancelled) =>
{
    if (error == null)
      {
          if (permissions.TryGetValue("premium", out Entitlement premium) && premium.IsActive)
          {
             // Handle the active entitlement here
          }
      }
      else
      {
        // Handle the error  
        Debug.Log("Error" + error.ToString());
      }
});

try {
  const purchaseUpdateModel = product.toPurchaseUpdateModel('oldProductId');
  const entitlement = await Qonversion.getSharedInstance().updatePurchase(purchaseUpdateModel);
} catch (e) {
  console.log(e);
}

try {
  const purchaseUpdateModel: PurchaseUpdateModel = product.toPurchaseUpdateModel('oldProductId');
  const entitlement: Map<string, Entitlement> = await Qonversion.getSharedInstance().updatePurchase(purchaseUpdateModel);
} catch (e) {
  console.log(e);
}