Logs are an essential part of every application, because they provide visibility throughout the life cycle. Log messages commonly get written to stdout or a file, but that’s just a location of the actual messages. More important is the output format which ultimately helps you to analyze the behavior …

HTTP as a stateless protocol won’t keep the client’s state across different requests in your application. A common example for this scenario is the log-in and afterwards remember the user credentials for a defined time interval, like until the browser window gets closed. In case you don’t …

In this blog post, we'll give you a list of some alternatives to Gson. Since it's such an important task of converting Java objects to JSON and vice versa, quite a few libraries popped up. We personally like Gson a lot, but there is no reason not to broaden one's …

The process of validating input data is important to avoid security issues or application errors due to malicious intentions by users. It’s essential that you never trust user data, because there’s always the one user that just wants to test if your application has the security glitch and …

As a developer you definitely know that each tool has its sunshine and also brings shadow. Well, that’s kind of poetic and precisely this guide shows you how to benefit a lot more from the sunshine that Sentry —the error logging platform— brings to your project. Within a previous …

As an application developer, you should never trust the data provided by users. At any possible input! That doesn’t only apply for request payload send within the request body, but also for query parameters. This guide shows you how to apply query parameter validation for a given route in …

In our last Retrofit tutorial, we've introduced mocking server responses with MockRetrofit. We've mentioned on the side that we're using the NetworkBehavior class, but didn't go into the details of the configuration options. In this tutorial, we'll make up for that. In case you need to make up for missed …

Retrofit offers a wide range of functionalities and there are a lot of possible configurations. A lot of larger applications will require some specific setup, for example for OAuth authentication. In order to achieve a clean and stable project, we'll introduce you our idea of a sustainable Android client: the …