应用帐单从缓存中读取

我最近在Google Play上发布了我的应用。该应用程序包含一个高级版本，所以如果购买，高级用户可以获得额外的功能。应用帐单从缓存中读取

要检查用户是否优质，我已经实施了一项测试。我从Android样本中跟踪了TrivialDrive中的示例。问题是我注意到有时需要一段时间才能检测到用户是高级用户。在我的朋友电话中，我曾两次看到，直到您尝试在一段时间后再次打开高级功能时，它才会检测到付费状态。

我开始怀疑它与需要时间的服务器连接有关。我认为这是自动缓存，但现在我不确定。

这里是我的代码：

@Override 
protected void onResume(){ 
    super.onResume(); 
    MainActivity.showToast("onResume"); 

    StringBuilder sb = new StringBuilder(); 
    sb.append(BASE64_PUBLIC_KEY1); 
    sb.append(BASE64_PUBLIC_KEY2); 
    sb.append(BASE64_PUBLIC_KEY3); 
    sb.append(BASE64_PUBLIC_KEY4); 
    sb.append(BASE64_PUBLIC_KEY5); 
    sb.append(BASE64_PUBLIC_KEY6); 
    final String BASE64_PUBLIC_KEY = sb.toString(); 
    // Create the helper, passing it our context and the public key to verify signatures with 
    // Log.d(TAG, "Creating IAB helper."); 
    mHelper = new IabHelper(this, BASE64_PUBLIC_KEY); 

    // enable debug logging (for a production application, you should set this to false). 
    mHelper.enableDebugLogging(false); 

    // Start setup. This is asynchronous and the specified listener 
    // will be called once setup completes. 
    // Log.d(TAG, "Starting setup."); 
    mHelper.startSetup(new IabHelper.OnIabSetupFinishedListener() { 
     public void onIabSetupFinished(IabResult result) { 
      // Log.d(TAG, "Setup finished."); 

      if (!result.isSuccess()) { 
       // Oh noes, there was a problem. 
       MainActivity.showToast("Problem setting up in-app billing: " + result); 
       return; 
      } 

      // Have we been disposed of in the meantime? If so, quit. 
      if (mHelper == null) return; 

      // Important: Dynamically register for broadcast messages about updated purchases. 
      // We register the receiver here instead of as a <receiver> in the Manifest 
      // because we always call getPurchases() at startup, so therefore we can ignore 
      // any broadcasts sent while the app isn't running. 
      // Note: registering this listener in an Activity is a bad idea, but is done here 
      // because this is a SAMPLE. Regardless, the receiver must be registered after 
      // IabHelper is setup, but before first call to getPurchases(). 
      mBroadcastReceiver = new IabBroadcastReceiver(SkeetStatistic.this); 
      IntentFilter broadcastFilter = new IntentFilter(IabBroadcastReceiver.ACTION); 
      registerReceiver(mBroadcastReceiver, broadcastFilter); 

      // IAB is fully set up. Now, let's get an inventory of stuff we own. 

      ArrayList<String> list_items = new ArrayList<String>(); 
      list_items.add(SKU_PREMIUM); 

      // Log.d(TAG, "Setup successful. Querying inventory."); 
      mHelper.queryInventoryAsync(true, list_items, mGotInventoryListener); 
     } 
    }); 
}

mGotInventoryListener：

 // Listener that's called when we finish querying the items and subscriptions we own 
IabHelper.QueryInventoryFinishedListener mGotInventoryListener = new IabHelper.QueryInventoryFinishedListener() { 
    public void onQueryInventoryFinished(IabResult result, Inventory inventory) { 
     // Log.d(TAG, "Query inventory finished."); 
     // Have we been disposed of in the meantime? If so, quit. 
     if (mHelper == null) return; 

     // Is it a failure? 
     if (result.isFailure()) { 
     // Log.d(TAG,"Failed to query inventory: " + result); 
      return; 
     } 

    // Log.d(TAG, "Query inventory was successful."); 
    /* 
    * Check for items we own. Notice that for each purchase, we check 
    * the developer payload to see if it's correct! See 
    * verifyDeveloperPayload(). 
    */ 

    // Do we have the premium upgrade? 
    Purchase premiumPurchase = inventory.getPurchase(SKU_PREMIUM); 
    mIsPremium = (premiumPurchase != null && verifyDeveloperPayload(premiumPurchase)); 
    if (mIsPremium){ 
    // System.out.println("Premium"); 
     MainActivity.showToast("Premium"); 
    } 
    if (!mIsPremium){ 
     MainActivity.showToast("Not Premium"); 
    } 
    // Log.d(TAG, "User is " + (mIsPremium ? "PREMIUM" : "NOT PREMIUM")); 

    setWaitScreen(false); 
    // Log.d(TAG, "Initial inventory query finished; enabling main UI."); 
} 
};

当我看在IabHelper类，似乎他们称之为

mService.getPurchase().

正如我的理解是从文档中，应该从缓存中读取它，但我可能是错的。

任何想法如何使其更强大的赞赏。我真的不喜欢有些高级用户可以选择升级。

问候埃里克

来源

2016-02-25 El_Loco

为了避免（减少）的情况时，用户可以对已经拥有的产品推出购买流程需要folow中下一个recomendations：

使用本地缓存或自己的远程服务器为活动加载初始化状态。在TrivialDrive这看起来像下面的代码：

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    setContentView(R.layout.activity_main); 

    // load game data 
    loadData(); 
    mHelper = new IabHelper(this, base64EncodedPublicKey); 
    mHelper.startSetup(new IabHelper.OnIabSetupFinishedListener() { 
     // listener implementation 
    } 
    //... 
} 

void loadData() { 
    SharedPreferences sp = getPreferences(MODE_PRIVATE); 
    mTank = sp.getInt("tank", 2); 
    Log.d(TAG, "Loaded data: tank = " + String.valueOf(mTank)); 
}

检查资之前显示产品列表购买用户
在用户的情况下已经拥有的产品，只是skeep购买流量和只显示用户congrantulations。像这样：“感谢您升级到PREMIUM版本！”

来源

2017-05-07 14:49:18 Sergey

应用帐单从缓存中读取

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