Summary
In this chapter, we analyzed the building blocks required to build a maintainable application. We also investigated one of the most common issues that developers come across when using the Android framework, which is maintaining the states of objects during life cycle changes.
We started by analyzing ViewModel components and how they solve the issue of holding data during orientation changes. We added Flow data streams to ViewModel components to show how the two complement each other, and looked at how we can use other data streams with ViewModel components and compare those with Flow data streams.
We also looked at how we can save the instance state using ViewModel components in combination with SavedStateHandle, which transfers the responsibility of saving states from Activity and Fragment components to ViewModel components.
We then moved on to Room to show how we can persist data with minimal effort and without much SQLite boilerplate code. We also explored...
