应用程序计费v3购买

Question

在我的测试应用程序中，用户点击一个购买按钮，然后购买一个物品。当购买完成时，一个textview会显示为“购买完成”。都很好。：）。然而，当我杀死应用程序，并再次打开它，购买按钮再次出现....：/。为什么会发生这种情况？谷歌对此不是很清楚。下面是代码。

public class MainActivity extends Activity {

IInAppBillingService mService;
ServiceConnection connection;
String inappid = "victory.walkto.testingpaymentsd.productid"; //replace this with your in-app product id
Button purchaseBtn;
Button clickBtn;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Intent serviceIntent = new Intent("com.android.vending.billing.InAppBillingService.BIND");
    serviceIntent.setPackage("com.android.vending");

    // first this
    connection = new ServiceConnection() {

        @Override
        public void onServiceDisconnected(ComponentName name) {
            mService = null;

        }

        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            mService = IInAppBillingService.Stub.asInterface(service);
        }
    };

    // then this
    bindService(serviceIntent,connection, Context.BIND_AUTO_CREATE);

    purchaseBtn = (Button) findViewById(R.id.purchase);
    clickBtn = (Button) findViewById(R.id.clickButton);
    clickBtn.setVisibility(View.GONE);
    purchaseBtn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            ArrayList skuList = new ArrayList();
            skuList.add(inappid);
            Bundle querySkus = new Bundle();
            querySkus.putStringArrayList("ITEM_ID_LIST", skuList);
            Bundle skuDetails;


            try {
                Bundle ownedItems = mService.getPurchases(3,  
      getPackageName(), "inapp", null);
           // Check response
                int responseCode =  
      ownedItems.getInt("RESPONSE_CODE");
                if (responseCode != 0) {
                    throw new Exception("Error");
                }
     // Get the list of purchased items
                ArrayList<String> purchaseDataList =
                        ownedItems.getStringArrayList("INAPP_PURCHASE_DATA_LIST");
                for (String purchaseData : purchaseDataList) {
                    JSONObject o = new JSONObject(purchaseData);
                    String purchaseToken = o.optString("token", o.optString("purchaseToken"));
                    // Consume purchaseToken, handling any errors
                    mService.consumePurchase(3, getPackageName(), purchaseToken);
                }
                skuDetails = mService.getSkuDetails(3, getPackageName(),
                        "inapp", querySkus);

                int response = skuDetails.getInt("RESPONSE_CODE");
                if (response == 0) {

                    ArrayList<String> responseList = skuDetails
                            .getStringArrayList("DETAILS_LIST");

                    for (String thisResponse : responseList) {
                        JSONObject object = new JSONObject(thisResponse);
                        String sku = object.getString("productId");
                        String price = object.getString("price");
                        if (sku.equals(inappid)) {
                            System.out.println("price " + price);
                            Bundle buyIntentBundle = mService
                                    .getBuyIntent(3, getPackageName(), sku,
                                            "inapp",
                                            "bGoa+V7g/yqDXvKRqq+JTFn4uQZbPiQJo4pf9RzJ");
                            PendingIntent pendingIntent = buyIntentBundle
                                    .getParcelable("BUY_INTENT");
                            startIntentSenderForResult(
                                    pendingIntent.getIntentSender(), 1001,
                                    new Intent(), Integer.valueOf(0),
                                    Integer.valueOf(0), Integer.valueOf(0));
                            purchaseBtn.setVisibility(View.GONE);

                            clickBtn.setOnClickListener(new View.OnClickListener() {
                                @Override
                                public void onClick(View v) {
                                    Toast.makeText(getApplicationContext(),"I am clicked",Toast.LENGTH_SHORT).show();
                                }
                            });
                        }
                    }
                }
            } catch (RemoteException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IntentSender.SendIntentException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    });
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == 1001) {
        String purchaseData = data.getStringExtra("INAPP_PURCHASE_DATA");

        if (resultCode == RESULT_OK) {
            clickBtn.setVisibility(View.VISIBLE);
            try {
                JSONObject jo = new JSONObject(purchaseData);
                String sku = jo.getString(inappid);
                Toast.makeText(
                        MainActivity.this,
                        "You have bought the " + sku
                                + ". Excellent choice,adventurer!",
                        Toast.LENGTH_LONG).show();

            } catch (JSONException e) {
                System.out.println("Failed to parse purchase data.");
                e.printStackTrace();
            }
        }
    }
}
@Override
public void onDestroy() {
    super.onDestroy();
    if (connection != null) {
        unbindService(connection);
    }
  }
}

固定

SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
            SharedPreferences.Editor editor = settings.edit();
            editor.putString("productId", sku);
            editor.putString("purchaseToken", purchaseToken);
            editor.putString("orderId", orderId);
            editor.commit();

SharedPreferences spreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
            productId = spreferences.getString("productId", "");
            purchaseToken = spreferences.getString("purchaseToken", "");
            orderId = spreferences.getString("orderId", "");

最后使用if条件使视图可见或不可见

if(orderId.isEmpty()) {


                entryFee.setVisibility(View.VISIBLE);
                paymentButton.setVisibility(View.VISIBLE);
                paymentText.setVisibility(View.VISIBLE);
                teamTextField.setVisibility(View.GONE);
                btn.setVisibility(View.GONE);
                paymentButton.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {


                        ArrayList skuList = new ArrayList();
                        skuList.add(inappid);
                        querySkus = new Bundle();
                        querySkus.putStringArrayList("ITEM_ID_LIST", skuList);

                        checkPayment();


                    }
                });
            }else{
                entryFee.setVisibility(View.GONE);
                paymentButton.setVisibility(View.GONE);
                paymentText.setVisibility(View.GONE);
                teamTextField.setVisibility(View.VISIBLE);
                btn.setVisibility(View.VISIBLE);
            }

解决方案并不难，但我必须大量阅读文档，使用调试器点，就是这样：）。

Answer 1

当你杀死你的应用程序时，它会再次运行，从头开始设置。您需要检查是否适合在onCreate中显示您的按钮，或者使用payment Api进行检查（如果可能的话），或者将您的状态存储在本地的SharedPreference中并进行检查。