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How to develop a Postmates-like delivery service app

How to develop a Postmates-like delivery service app

What to do if you want a food delivery from a restaurant without having such kind of service? Someone will have to go there anyway to order and bring everything you need. And what to do if there’s nobody to do that? And that’s where Postmates comes to the rescue, a popular food order app: user simply opens it, chooses some of the available restaurants and food he/she wants, and then receives it from the company’s courier. Let’s see, how to create a food delivery app, similar to Postmates.

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Android WebSocket. Feedback, or When every second matters

Android WebSocket. Feedback, or When every second matters

Apps that are using network communicate with the server by executing queries and receiving answers. Server acts as an information desk providing answers to any questions and accepting inquiries made in a certain way to further process and save them. This communication model allows your service to perform most of the required tasks. And what if you need to tell the client that the required data has already arrived? Let’s take a look at this situation using the information desk analogy.

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Saving data in Android using Realm

Saving data in Android using Realm

How to save data for your mobile application? There’re three possible ways: Shared preferences/User defaults, files and databases. When choosing which one to use you should take into account the volume of data your app will work with, mobile data type and what exactly you’ll be doing with the data. Traditionally mobile software developers were using SQLite but there’s another type of the database out there called Realm and here we’d like to talk about its advantages and show how we use it in our projects.

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