In my opinion, good error handling is one of the most important features of the application. But most people in development process ignore them: Product owner focuses on happy path ignoring issues like missing an internet connection. UI/UX designers focus on product owner satisfaction and they don’t have good technical…

Sometimes you see StackOverflowError’s on some devices. Some of them you can’t reproduce on your device or the crashes come about in unexpected situations. There are some tips that will allow finding the issues more easily. Description. Usually, StackOverflowError appears unexpectedly and sometimes it’s hard to trace them with just a…

During the implementation of a chat app, I had to implement some kind of lock logic. Usually, a code with locking and unlocking is hard to read. If business logic is complicated and you will add complicated locking, your code will become unreadable and unmaintainable. TL;DR; Good example: NewDatabaseTest NewDatabase Compared…

This is an introduction to some patterns that can be helpful during an implementation of Android applications that operate on any structured data, especially downloaded from APIs. Warning: Lots of codes. Since it’s relatively a technical article and I am an Android dev (probably as you are), there will be…

We like to implement UI that sends some post to API. Our UI need a button that sends a post, and a text field called “message” so a user is able to choose a message that is posted to the server. Of course, our UI can display errors and show…

Unfortunately documentation about GCM User Notifications is incomplete and sometimes wrong. Here are some server-site curl requests that can be used while using this api. Creating new notification Request curl -vvv -X POST —header “Content-Type: application/json” —header “project_id: <YOUR-PROJECT-ID>” —header “Authorization: key=<YOUR-PROJECT-SECRET-KEY>” —data @- “https://android.googleapis.com/gcm/notification" …

Large background problem Recently it has become popular to design UI with a large bitmap in the background — the same as on the screenshot aside. However designers usually don’t think about the problem with the application size. We should cover all devices shapes and sizes including tablets with xxhdpi density. Such approach…