Make the most out of the preview screen during iterative development — With the new Android Studio Electric Eel, the support for composable previews got new features like the definition of Android device size, multiple previews with the class definition, sample data sources and more. Composable Previews give you the option to see the actual state of your composables without an emulator…

Putting composables into an appropriate structure — In the previous article, the basics of navigation with NavHost and NavController have been described. However, with more complex apps, the app's navigation graph could get messy and lead to redundant mistakes in code. The app structure can make it much more testable, scalable, and easier to fix. …

A simple example of using NavHost and NavController — With Jetpack Compose, Android is abandoning implicit ways of moving around with fragment transactions, navigations and intents for activities. Nowadays, the app should declare all the possible paths users can take at the beginning. Jetpack compose provides a native way how to navigate through your multiple components. With NavHost and…

Avoid the pitfall of using the current time in code during testing — Many apps search for updates, manipulate personal data, fetch newsfeeds, etc. However, the data are time-dependent. Sometimes the operations can take minutes, hours or days. We want to do something every five minutes or every hour and create a timestamp in the database to archive change, log new data or…

Structure to make your project more intuitive and conflict-free with a team of developers — Throughout the internet, I found multiple ways to structure your project into folders with your favourite IDE. However, none worked for me. I always forgot where I put the needed class, and I searched it through the IDE. Teammates were working on their tasks and made multiple changes, which affected…

It is not about which one is better but which one suits the project — Nowadays, mobile development can be done in multiple environments like Kotlin/Swift, Flutter, Kotlin Multiplatform, React Native, Xamarin and others. However, picking the best one is a hard decision to make. So if you made it to this point, when deciding between Flutter and Kotlin/Swift, I would try to clarify and…

How to properly ask for location in location services 21.0.0 — While I was updating one of my projects, I encountered a deprecation warning in my location handling. One whole section while creating the LocationRequest was crossed-out as deprecated. Location services were updated to version 21.0.0, and the LocationRequest.create was deprecated with the new update. The changes occurred at 13. 10…

Permanent analysis or processing is almost impossible on the Android — The phone manufacturers try their best to make their phones last on the battery as long as the battery permits. They customise the hardware, implement as large battery as possible and customise the Android. The design of the Android changes from manufacturer to manufacturer because they provide their custom launcher…

Overcoming limitations of smartphone sensors — Every year, 1.3 million people die because of car accidents. 20–50 million people suffer injuries. [WHO] Car accident can put the body under acceleration force with a power of more than 100g. [NHTSA] Nowadays, phones like Pixels from Google or the latest iPhones support car accident detection. Pixels uses a…