尝试调用接口方法“android.IInAppBillingService ......对空对象引用

Question

大家好我有发票的问题，当我按一下按钮我呼吁在另一类这个方法：

public void launchPurchase() { 
    BillingManager.getInstance().setActivity(this); 
    BillingManager.getInstance().Initialize(); 
    BillingManager.getInstance().tryToPurchase("pubgame"); 
} 

我得到错误

java.lang.NullPointerException: Attempt to invoke interface method 'android.os.Bundle com.android.vending.billing.IInAppBillingService.getBuyIntent(int, java.lang.String, java.lang.String, java.lang.String, java.lang.String)' on a null object reference 
at inappbilling.BillingManager.tryToPurchase(BillingManager.java:57) 
at com.kingerino.erwan.colorun.succes.launchPurchase(succes.java:377) 
at com.kingerino.erwan.colorun.succes$2.onClick(succes.java:157) 
at android.view.View.performClick(View.java:5205) 
at android.view.View$PerformClick.run(View.java:21164) 
at android.os.Handler.handleCallback(Handler.java:745) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:171) 
at android.app.ActivityThread.main(ActivityThread.java:5456) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

这是我的克拉斯BillingManager

public class BillingManager extends Activity{ 
IInAppBillingService mService; 
private static BillingManager ourInstance = new BillingManager(); 

public static BillingManager getInstance() { 
    return ourInstance; 
} 


private BillingManager() { 
} 
public void Initialize() { 
    // Payment etc 
    ServiceConnection mServiceConn = new ServiceConnection() { 
     @Override 
     public void onServiceDisconnected(ComponentName name) { 
      mService = null; 
     } 
     @Override 
     public void onServiceConnected(ComponentName name, IBinder service) { 
      mService = IInAppBillingService.Stub.asInterface(service); 
      // Do something here 
     } 
    }; 

    Intent serviceIntent = new Intent("com.android.vending.billing.InAppBillingService.BIND"); 
    serviceIntent.setPackage("com.android.vending"); 
    activity.bindService(serviceIntent, mServiceConn, Context.BIND_AUTO_CREATE); 
} 


/** A/D 
* 
*/ 

public void tryToPurchase(String idProduct) { 
    Bundle buyIntentBundle = null; 
    try { 
     buyIntentBundle = mService.getBuyIntent(3, activity.getPackageName(), idProduct, "inapp", "bGoa+V7g/yqDXvKRqq+JTFn4uQZbPiQJo4pf9RzJ"); 
     PendingIntent pendingIntent = buyIntentBundle.getParcelable("BUY_INTENT"); 
     if (pendingIntent == null) { 
      return; 
     } 
     activity.startIntentSenderForResult(pendingIntent.getIntentSender(), 1001, new Intent(), Integer.valueOf(0), Integer.valueOf(0), Integer.valueOf(0)); 
    } catch (RemoteException e) { 
     e.printStackTrace(); 
    } catch (IntentSender.SendIntentException e) { 
     e.printStackTrace(); 
    } 
} 

/** Getter/Setter 
* 
*/ 
public void setActivity(Activity activity) { 
    this.activity = activity; 
} 

/** A/D 
* 
*/ 
private Activity activity; 


public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if (requestCode == 1001) { 
     int responseCode = data.getIntExtra("RESPONSE_CODE", 0); 
     String purchaseData = data.getStringExtra("INAPP_PURCHASE_DATA"); 
     String dataSignature = data.getStringExtra("INAPP_DATA_SIGNATURE"); 

     if (resultCode == Activity.RESULT_OK) { 
      try { 
       JSONObject jo = new JSONObject(purchaseData); 
       String sku = jo.optString("productId"); 
       String packageName = jo.optString("packageName"); 
       String purchaseToken = jo.optString("purchaseToken"); 

       if (sku.equalsIgnoreCase("pubgame")) { 
        // Do something here... 
        //int response = BillingManager.getInstance().getmService().consumePurchase(3, packageName, purchaseToken); 
       }/* 
       else if (sku.equalsIgnoreCase("myItem2")) { 
        // Do something here... 
        //int response = BillingManager.getInstance().getmService().consumePurchase(3, packageName, purchaseToken); 
       }*/ 
      } catch (JSONException e) { 
       e.printStackTrace(); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
     } 
    } 
} 
public void getPurchaseStatus(String idProduct) { 
    try { 
     Bundle ownedItems = null; 
     ownedItems = mService.getPurchases(3, activity.getPackageName(), "inapp", null); 
     int response = ownedItems.getInt("RESPONSE_CODE"); 
     if (response == 0) { 
      ArrayList<String> ownedSkus = ownedItems.getStringArrayList("INAPP_PURCHASE_ITEM_LIST"); 

      for (int i = 0; i < ownedSkus.size(); ++i) { 
       String sku = ownedSkus.get(i); 
       if (sku.equalsIgnoreCase(idProduct)) { 
        // Do something here... 
       } 
      } 
     } 
    } catch (RemoteException e) { 
     e.printStackTrace(); 
    } 
} 


} 

我使用的代码Ø n github：https://gist.github.com/adrienfenech/a477de4d16b118402faf

Answer 1

计费服务的初始化是异步的。因此，立即在调用BillingManager.getInstance（）。Initialize（）;变量mService为空，你会得到异常。

它在调用mServiceConn.onServiceConnected（）之后被初始化。

您可以通过以下方式之一使其正确：

1. 初始化应用程序内的应用程序启动计费服务，并调用tryToPurchase（）

2. 实施后检查MSERVICE为空mServiceConn.onServiceConnected（）的监听器，并在帐单服务初始化后运行tryToPurchase（）。