Error Exception occurred while processing task when using Iap API from Amazon purchase - in-app-purchase

Question

followed the instructions on amazon developer page to be able to add IAP API to my app. But it doesn't work and throws an error:
AbstractCommandTask: Exception occurred while processing task: com.amazon.a.a.n.a.a.a: AUTH_TOKEN_VERIFICATION_FAILURE: null: null
com.amazon.a.a.n.a.a.a: AUTH_TOKEN_VERIFICATION_FAILURE: null: null
at com.amazon.a.a.n.a.b.a(AuthenticationTokenVerifier.java:94)
at com.amazon.a.a.n.a.a.a(AbstractCommandTask.java:204)
at com.amazon.a.a.n.a.a.a(AbstractCommandTask.java:131)
at com.amazon.a.a.n.b.b$1.run(SimpleTaskPipeline.java:179)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.os.HandlerThread.run(HandlerThread.java:61)
I downloaded the amazon app tester and added the amazon.sdkteste.json file to the sdcard folder as shown in the instructions and in the app tester app also recognized this file.
I also downloaded the AppstoreAuthenticationKey.pem file and saved it to the app's app/src/main/assets folder. Can anyone tell me what am I missing or can someone give me a solution to fix this problem.
Thank
Below Is My AndroidManifest.xml Manifest:
<?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.amazontinhtoannhanh">
<application
android:allowBackup="true"
android:dataExtractionRules="#xml/data_extraction_rules"
android:fullBackupContent="#xml/backup_rules"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.TinhToanNhanh"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name = "com.amazon.device.iap.ResponseReceiver"
android:permission = "com.amazon.inapp.purchasing.Permission.NOTIFY"
android:exported="true">
<intent-filter>
<action android:name = "com.amazon.inapp.purchasing.NOTIFY" />
</intent-filter>
</receiver>
</application>
</manifest>
MainActivity.java:
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import com.amazon.device.drm.LicensingService;
import com.amazon.device.iap.PurchasingService;
import java.util.HashSet;
import java.util.Set;
public class MainActivity extends AppCompatActivity {
Button btn_subcire;
Set <String>productSkus=null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
LicensingService.verifyLicense(this.getApplicationContext(), new LicensingCallback());
TinhToanNhanhPurchasingLIstener purchasingListener= new TinhToanNhanhPurchasingLIstener();
PurchasingService.registerListener(this.getApplicationContext(), purchasingListener);
btn_subcire= (Button) findViewById(R.id.btn_subcire);
btn_subcire.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
PurchasingService.purchase("com.match.payment");
}
});
}
#Override
protected void onResume() {
super.onResume();
PurchasingService.getUserData();
productSkus = new HashSet<String>();
productSkus.add( "com.mathterm.payment" );
productSkus.add( "com.mathterm2.payment" );
productSkus.add( "com.mathterm3.payment" );
productSkus.add( "com.mathterm4.payment" );
productSkus.add("25");
PurchasingService.getProductData(productSkus);
PurchasingService.getPurchaseUpdates(false);
}
}
LicensingCallback.java:
import static android.content.ContentValues.TAG;
import android.util.Log;
import com.amazon.device.drm.model.LicenseResponse;
public class LicensingCallback implements com.amazon.device.drm.LicensingListener {
public void onLicenseCommandResponse(final LicenseResponse licenseResponse) {
final LicenseResponse.RequestStatus status = licenseResponse.getRequestStatus();
Log.d(TAG, "onLicenseCommandResponse: RequestStatus (" + status + ")");
switch (status) {
case LICENSED:
Log.d(TAG, "onLicenseCommandResponse: LICENSED");
break;
case NOT_LICENSED:
Log.d(TAG, "onLicenseCommandResponse: NOT_LICENSED");
break;
case ERROR_VERIFICATION:
Log.d(TAG, "onLicenseCommandResponse: ERROR_VERIFICATION");
break;
case ERROR_INVALID_LICENSING_KEYS:
Log.d(TAG, "onLicenseCommandResponse: ERROR_INVALID_LICENSING_KEYS");
break;
case EXPIRED:
Log.d(TAG, "onLicenseCommandResponse: EXPIRED");
break;
case UNKNOWN_ERROR:
Log.d(TAG, "onLicenseCommandResponse: ERROR");
} } }
TinhToanNhanhPurchasingLIstener:
import static android.content.ContentValues.TAG;
import android.util.Log;
import com.amazon.device.iap.PurchasingListener;
import com.amazon.device.iap.PurchasingService;
import com.amazon.device.iap.model.FulfillmentResult;
import com.amazon.device.iap.model.Product;
import com.amazon.device.iap.model.ProductDataResponse;
import com.amazon.device.iap.model.PurchaseResponse;
import com.amazon.device.iap.model.PurchaseUpdatesResponse;
import com.amazon.device.iap.model.Receipt;
import com.amazon.device.iap.model.UserDataResponse;
import java.util.Map;
public class TinhToanNhanhPurchasingLIstener implements PurchasingListener {
private String currentUserId = null ;
private String currentMarketplace = null ;
boolean reset = false ;
#Override
public void onUserDataResponse(UserDataResponse userDataResponse) {
final UserDataResponse.RequestStatus status = userDataResponse.getRequestStatus();
switch (status) {
case SUCCESSFUL:
currentUserId = userDataResponse.getUserData().getUserId();
currentMarketplace = userDataResponse.getUserData().getMarketplace();
break ;
case FAILED:
case NOT_SUPPORTED:
break ;
}
}
#Override
public void onProductDataResponse(ProductDataResponse response) {
switch (response.getRequestStatus()) {
case SUCCESSFUL:
for ( final String s : response.getUnavailableSkus()) {
Log.v(TAG, "Unavailable SKU:" + s);
}
final Map<String, Product> products = response.getProductData();
for ( final String key : products.keySet()) {
Product product = products.get(key);
Log.v(TAG, String.format( "Product: %s\n Type: %s\n SKU: %s\n Price: %s\n Description: %s\n" , product.getTitle(), product.getProductType(), product.getSku(), product.getPrice(), product.getDescription()));
}
break ;
case FAILED:
Log.v(TAG, "ProductDataRequestStatus: FAILED" );
break ;
}
}
#Override
public void onPurchaseResponse(PurchaseResponse purchaseResponse) {
switch (purchaseResponse.getRequestStatus())
{
case SUCCESSFUL:
PurchasingService. notifyFulfillment(purchaseResponse.getReceipt().getReceiptId(), FulfillmentResult.FULFILLED);
break;
case FAILED:
break;
}
}
#Override
public void onPurchaseUpdatesResponse(PurchaseUpdatesResponse response) {
switch (response.getRequestStatus()) {
case SUCCESSFUL:
for ( final Receipt receipt : response.getReceipts()) {
// Process receipts
}
if (response.hasMore()) {
PurchasingService.getPurchaseUpdates(true);
}
break ;
case FAILED:
break ;
}
}
}

Answer 1

I found the solution for it you just need to run the following adb command on the device where you want to run the app:
adb shell setprop debug.amazon.sandboxmode debug