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Posts by Oleg Vyalyh

Backendless Data Collection Tutorial for Java/Android

In this article, we’ll consider some practical examples of how to use the Backendless Data Collection library to its fullest extent. You can find code documentation and sources for the library here.

by Oleg Vyalyh on September 10, 2019

How to Get Additional Information From User API Requests

Sometimes (or in some cases, every time) when you invoke a custom API Service, you may need additional information about the context from which the HTTP request was sent/received, such as user or device information. To collect that information, we provide a class called InvocationContext.

by Oleg Vyalyh on July 9, 2019

How to Perform Complete Business Logic in One API Call

In a previous article (How to Save an Object with All the Children in a Single Call to Server), we examined how to simply save an object model. However, Backendless custom services give us much more flexibility when it comes to saving objects.

by Oleg Vyalyh on May 30, 2019

How to Send Personalized Push Notifications at Scale

The ability to send push notifications has been a key Backendless feature for quite a while, but until now, it only had a basic set of actions such as sending to all devices in a specific channel and/or to a specific device type (Android/iOS). With the latest changes, it has grown into a powerful tool…

by Oleg Vyalyh on April 29, 2019

How to Use Code Generation to Simplify Working With Data

In Java, entity objects are classes that represent data from your table. From an object-oriented perspective, these objects are built to encapsulate your data in the real-world problem domain. 

by Oleg Vyalyh on April 9, 2019

How to Save an Object With Children in a Single API Call

In this article, we will describe how to use the Backendless API to save multiple related records with one primary (parent) record in a table. All related records (children) will be stored in separate tables as a part of the same routine. Examples of this type of requirement might be personnel records tied to a…

by Oleg Vyalyh on October 3, 2018

How to Implement Mobile-to-Web Cross Login Using a QR Code

What does  “mobile-to-web cross login with a QR code” mean? It is one of the approaches for two-factor authentication. Suppose that a user is already authenticated in your application (in our example, it would be an android app) and the user wants to use their actual session to perform an automatic authentication in another application…

by Oleg Vyalyh on July 11, 2018

How to Split Images into Multiple Resolutions Via API Service

Images displayed in your app may be responsible for a large portion of the bandwidth consumed by the device. This has a direct impact on the app’s performance, battery consumption, and the amount of memory the app allocates. As a result, optimizing images can often bring noticeable performance improvements for your app: the fewer bytes…

by Oleg Vyalyh on June 8, 2018

How to Generate a QR Code With Backendless API Service

In this article, we will learn how to create QR codes with a custom Backendless API Service. For the sample code reviewed later in the article, we will use Java and the ZXing library (https://github.com/zxing). What is a QR code? A QR code is a computer-generated image with some information encoded in a graphical way….

by Oleg Vyalyh on May 29, 2018
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