java - 如何在应用程序启动时验证用户购买非消耗性产品

Question

我刚刚使用 google play billing 和 aidl 完成了应用内结算设置。成功购买后，高级功能将通过 boolean 值激活。但在应用程序关闭并重新启动后，高级功能就会消失。即 boolean 值恢复为 false。我想知道只要购买了高级版，如何确保 boolean 值在应用程序启动后保持为 true。

在主要 Activity 上

    public class MainActivity extends AppCompatActivity {

public static boolean proFeature = false;

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

}

关于 InAppBilling Activity

    public class InAppBilling extends Activity implements IabBroadcastReceiver.IabBroadcastListener {
private static final String TAG = ".InAppBilling";

IabHelper mHelper;
boolean premiumFeature = false;
static final String SKU_PREMIUM = "android.test.purchased";
static final int RC_REQUEST = 10001;
IabBroadcastReceiver mBroadcastReceiver;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.test_lay);

}

    IabHelper.QueryInventoryFinishedListener mGotInventoryListener = new IabHelper.QueryInventoryFinishedListener() {
    @Override
    public void onQueryInventoryFinished(IabResult result, Inventory inv) {
        Log.d(TAG, "Query inventory finished.");

        if (mHelper == null) return;

        if (result.isFailure()) {
            complain("Failed to query inventory: " + result);
            return;
        }

        Log.d(TAG, "Query inventory was successful.");

        Purchase premiumPurchase = inv.getPurchase(SKU_PREMIUM);
        premiumFeature = (premiumPurchase != null && verifyDeveloperPayload(premiumPurchase));
        Log.d(TAG, "User is " + (premiumFeature ? "PREMIUM" : "NOT PREMIUM"));

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

    IabHelper.OnIabPurchaseFinishedListener mPurchaseFinishedListener = new IabHelper.OnIabPurchaseFinishedListener() {
    @Override
    public void onIabPurchaseFinished(IabResult result, Purchase purchase) {
        Log.d(TAG, "Purchase finished: " + result + ", purchase: " + purchase);

        if (mHelper == null) return;

        if (result.isFailure()) {
            complain("Error purchasing: " + result);
            setWaitScreen(false);
            return;
        }
        if (!verifyDeveloperPayload(purchase)) {
            complain("Error purchasing. Authenticity verification failed.");
            setWaitScreen(false);
            return;
        }

        Log.d(TAG, "Purchase successful.");

        if (purchase.getSku().equals(SKU_PREMIUM)) {
            // bought the premium upgrade!
            Log.d(TAG, "Purchase is premium upgrade. Congratulating user.");
            alert("Thank you for upgrading to premium!");
            premiumFeature = true;
            updateUi();
            setWaitScreen(false);
        }

    }
};

    public void updateUi(){
    button.setVisibility(premiumFeature ? View.GONE : View.VISIBLE);
    if (premiumFeature){
        MainActivity.proFeature = true;
    }else{
    MainActivity.proFeature = false;
    }
}

Answer 1

在您的购买完成监听器中，修改以下代码以将值存储到共享首选项中。

       if (purchase.getSku().equals(SKU_PREMIUM)) {
            // bought the premium upgrade!
            Log.d(TAG, "Purchase is premium upgrade. Congratulating user.");
            alert("Thank you for upgrading to premium!");
            premiumFeature = true;
            
            SharedPreferences sharedPref = context.getSharedPreferences(
                  "my_sp", Context.MODE_PRIVATE);
            sharedPref.edit().putBoolean("isPremium, premiumFeature).commit();

            updateUi();
            setWaitScreen(false);
        }

并在应用程序重新启动时再次从共享首选项中获取此值。

SharedPreferences sharedPref = context.getSharedPreferences(
                      "my_sp", Context.MODE_PRIVATE);
premiumFeature = sharedPref.getBoolean("isPremium, false);

更新(2022 年 2 月 19 日):

• 正如 @Shazniq 所说，为了安全起见，将这些详细信息以及用户个人资料数据存储在服务器上总是好的。因此，每次启动应用程序时，您都可以验证详细信息。您必须在需要时应用自己的逻辑来验证它。