如何使用getPurchases（） - 安卓

Question

我已经成功实施应用程式账单到我的应用程序。该IAP成功地工作，我测试，以确保其工作。 当用户点击一个按钮，他们必须做出的IAP进行。然而，每次用户点击它启动IAP按钮，即使他们已经取得了IAP。我希望我的IAP是非消耗性明显。目前，我存储在IAP SharedPreferences，但如果用户重新安装应用程序，他们失去了IAP。 那么，如何可以使用getPurchases()或restoreTransactions()我onCreate或onClick方法来检查用户是否有购买的具体项目？我已经找遍了互联网，通过这么多的样本看，它似乎并没有工作，也许我误解虽然。 如果你需要我张贴任何代码，请你和我会更新我的职务。

Answer 1

使用这个库：

https://github.com/anjlab/android-inapp-billing-v3

如何使用？

在您的gradle这个使用这个：

repositories {
  mavenCentral()
}
dependencies {
  implementation 'com.anjlab.android.iab.v3:library:1.0.44'
}

应用内结算清单的权限：

<uses-permission android:name="com.android.vending.BILLING" />

如何利用图书馆的方法：

public class SomeActivity extends Activity implements BillingProcessor.IBillingHandler {
  BillingProcessor bp;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    bp = new BillingProcessor(this, "YOUR LICENSE KEY FROM GOOGLE PLAY CONSOLE HERE", this);
    bp.initialize();
    // or bp = BillingProcessor.newBillingProcessor(this, "YOUR LICENSE KEY FROM GOOGLE PLAY CONSOLE HERE", this);
    // See below on why this is a useful alternative
  }

  // IBillingHandler implementation

  @Override
  public void onBillingInitialized() {
    /*
    * Called when BillingProcessor was initialized and it's ready to purchase 
    */
  }

  @Override
  public void onProductPurchased(String productId, TransactionDetails details) {
    /*
    * Called when requested PRODUCT ID was successfully purchased
    */
  }

  @Override
  public void onBillingError(int errorCode, Throwable error) {
    /*
    * Called when some error occurred. See Constants class for more details
    * 
    * Note - this includes handling the case where the user canceled the buy dialog:
    * errorCode = Constants.BILLING_RESPONSE_RESULT_USER_CANCELED
    */
  }

  @Override
  public void onPurchaseHistoryRestored() {
    /*
    * Called when purchase history was restored and the list of all owned PRODUCT ID's 
    * was loaded from Google Play
    */
  }
}

注：onPurchaseHistoryRestored调用时初始化BillingProcessor只有第一次