To make one time purchase request in your Android app, follow these simple instructions:

Import our library into your project
Create PurchaseRequest specifying a APIKEY your service ID
Additionally you can set reference parameter on PurchaseRequest by calling setReference(String id) method
Create PurchaseManager and attach a new instance of PurchaseListener
Start payment by calling PurchaseManager.startPurchase(PurchaseRequest pr, Context context) method.

import c.payments.android.*;

public class LibExample extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
        
    ((Button)findViewById(R.id.buttonPurchase)).setOnClickListener(mPurchaseClick);
}

    OnClickListener mPurchaseClick = new OnClickListener() {
    @Override
    public void onClick(View v) {
            
    PurchaseManager.attachPurchaseListener(new PurchaseListener() {
      @Override
      public void onPurchaseSuccess(PurchaseResponse paramPurchaseResponse) {
      // handle purchase success
      }
      @Override
      public void onPurchaseFailed(PurchaseResponse paramPurchaseResponse) {
      // purchase fail
      }
      @Override
      public void onPurchaseCanceled(PurchaseResponse paramPurchaseResponse) {
      // purchase canceled by user
      }
      @Override
      public void onPurchaseDialogClosed() {
      // purchase dialog closed
      }

    });

    PurchaseRequest pr = new PurchaseRequest(<API-KEY>);
    pr.setReference(<YOUR-REFERENCE>); // optional
    pr.setPrice(<PRICE>); // optional
    pr.setLanguage(<ISO-639-1 code>); // optional
    pr.setMsisdn(<MSISDN>); // optional
        pr.setOperator(<ISO-639-1 code>); // optional
        pr.setCountry(<ISO 3166-1 Alpha 2 code>); // optional
        pr.setUserId(<YOUR-USERID>); // optional
    pr.setSignature(<GENERATED-SIGNATURE>); // optional
    pr.setParam(“mccmnc”,”20102”); // optional
 

    PurchaseManager.startPurchase(pr, LibExample.this);
    }
};

Make Purchase Request

Next step...

Additional Customizations of Centili Android Library