https://github.com/prashantvc/trivialdrive

Google IAP port
https://github.com/prashantvc/trivialdrive

Last synced: over 1 year ago
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Google IAP port

• Host: GitHub
• URL: https://github.com/prashantvc/trivialdrive
• Owner: prashantvc
• Created: 2017-01-04T11:33:39.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2017-06-28T10:53:10.000Z (almost 9 years ago)
• Last Synced: 2025-01-07T08:47:57.280Z (over 1 year ago)
• Language: C#
• Size: 95.7 KB
• Stars: 0
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# TrivialDrive

Google IAP billing sample port to Xamarin.Android

  Example game using in-app billing version 3.

 

  Before attempting to run this sample, please read the README file. It

  contains important information on how to set up this project.

 

  All the game-specific logic is implemented here in MainActivity, while the

  general-purpose boilerplate that can be reused in any app is provided in the

  classes in the util/ subdirectory. When implementing your own application,

  you can copy over util/.java to make use of those utility classes.

 

  This game is a simple "driving" game where the player can buy gas

  and drive. The car has a tank which stores gas. When the player purchases

  gas, the tank fills up (1/4 tank at a time). When the player drives, the gas

  in the tank diminishes (also 1/4 tank at a time).

 

  The user can also purchase a "premium upgrade" that gives them a red car

  instead of the standard blue one (exciting!).

 

  The user can also purchase a subscription ("infinite gas") that allows them

  to drive without using up any gas while that subscription is active.

 

  It's important to note the consumption mechanics for each item.

 

  PREMIUM: the item is purchased and NEVER consumed. So, after the original

  purchase, the player will always own that item. The application knows to

  display the red car instead of the blue one because it queries whether

  the premium "item" is owned or not.

 

  INFINITE GAS: this is a subscription, and subscriptions can't be consumed.

 

  GAS: when gas is purchased, the "gas" item is then owned. We consume it

  when we apply that item's effects to our app's world, which to us means

  filling up 1/4 of the tank. This happens immediately after purchase!

  It's at this point (and not when the user drives) that the "gas"

  item is CONSUMED. Consumption should always happen when your game

  world was safely updated to apply the effect of the purchase. So,

  in an example scenario:

 

  BEFORE:      tank at 1/2

  ON PURCHASE: tank at 1/2, "gas" item is owned

  IMMEDIATELY: "gas" is consumed, tank goes to 3/4

  AFTER:       tank at 3/4, "gas" item NOT owned any more

 

  Another important point to notice is that it may so happen that

  the application crashed (or anything else happened) after the user

  purchased the "gas" item, but before it was consumed. That's why,

  on startup, we check if we own the "gas" item, and, if so,

  we have to apply its effects to our world and consume it. This

  is also very important!