android_manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.munchbakery.app">

    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.CALL_PHONE" />

    <!--TODO remove android:largeHeap="true" later this is only a temporary fix until a more stable one is found-->
    <application
        android:name=".BaseApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:largeHeap="true"
        android:theme="@style/AppTheme">

        <meta-data android:name="com.facebook.sdk.ApplicationId"
                   android:value="@string/facebook_app_id"/>

        <activity android:name="com.facebook.FacebookActivity"
                  android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
                  android:label="@string/app_name" />

        <activity android:name="com.facebook.CustomTabActivity"
                  android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />
                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.BROWSABLE" />
                <data android:scheme="@string/fb_login_protocol_scheme" />
            </intent-filter>
        </activity>

        <activity
            android:name=".MainActivity"
            android:screenOrientation="portrait">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".SplashScreen"
            android:screenOrientation="portrait">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity
            tools:replace="android:theme"
            android:name="com.oppwa.mobile.connect.checkout.dialog.CheckoutActivity"
            android:theme="@style/Theme.Checkout.Light"
            android:windowSoftInputMode="adjustPan"
            android:exported="false"
            android:launchMode="singleTop" />

        <activity
            android:name=".checkout.CheckoutActivity"
            android:screenOrientation="portrait"
            android:launchMode="singleTask">

            <intent-filter>
                <data android:scheme="@string/checkout_ui_callback_scheme" />

                <action android:name="android.intent.action.VIEW" />

                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.BROWSABLE" />
            </intent-filter>

        </activity>

        <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="@string/google_api_key_data" />

        <service
            android:name=".location.FetchAddressIntentService"
            android:exported="false"/>

        <service
            android:name="com.oppwa.mobile.connect.service.ConnectService"
            android:exported="false" />

        <receiver
            android:name=".checkout.payment.CheckoutBroadcastReceiver"
            android:exported="false" />
    </application>

</manifest>

checkout.java

public void generateCheckoutId(double amount, String email, final ApiListener.GenerateCheckoutIdListener listener)

{

 ApiConnector connector = ApiConnector.init();

 ApiHandler handler = connector.createService(ApiHandler.class);



 JSONObject obj = new JSONObject();

 try

 {

  obj.put("amount", amount);

  obj.put("email", email);

 } catch (JSONException e)

 {

  e.printStackTrace();

 }

 JsonParser parser = new JsonParser();

 JsonObject body = (JsonObject) parser.parse(obj.toString());



 String url = Values.BASE_URL + "hyperpay/checkout";

 mCall = handler.post(url, DevUtil.getHeaders(mContext, false), body);

 mCall.enqueue(new Callback < ResponseBody > ()

  {

   @Override

   public void onResponse(@NonNull Call < ResponseBody > call, @NonNull Response < ResponseBody > response)

   {

    try

    {

     if (response.isSuccessful())

     {

      String serverResponse = response.body().string();

      JSONObject jsonObject = new JSONObject(serverResponse);

      String checkoutId = jsonObject.getString(" checkoutId");

      if (StringUtils.isNotBlank(checkoutId))

      {

       listener.onCheckoutIdGenerated(checkoutId);

      } else

      {

       AppLogger.error(TAG, "Null or Empty Checkout ID");

       listener.onError();

      }

     } else

     {

      String serverResponse = response.errorBody().string();

      JSONObject errorObject = new JSONObject(serverResponse);

      AppLogger.printErrorJSON(TAG, errorObject);

      listener.onError();

     }

    } catch (IOException | JSONException | NullPointerException e)

    {

     e.printStackTrace();

     listener.onError();

    }

   }



   @Override

   public void onFailure(@NonNull Call < ResponseBody > call, @NonNull Throwable t)

   {

    t.printStackTrace();

    listener.onError();

   }

  });

}

gistfile1.txt

This is the error

{
  "code":"200.300.404",
  "description":"invalid or missing parameter",
  "parameterErrors":[
     {
        "name":"shopperResultUrl",
        "value":null,
        "message":"missing parameter"
     },
     {
        "name":"notificationUrl",
        "value":null,
        "message":"Notification url must be present if shopperResultUrl is not a valid url"
     }
  ]
}

We are facing the same issue. Were you able to resolve it?