Hopefully this post will help you choose.
You can find examples here or here.Īs you can see, there is no perfect solution and it is up to your team to pick the approach that fits you best, balancing robustness, simplicity and consistency across your project. Nevertheless there are still some questions left and we discussed here the problem of loading ViewModel data and evaluating various options.įrom my experience, I recommend the Lazy Map approach as I found it to be a nice balance of pros and cons and is really easy to adopt. Introducing Architecture Components significantly simplified Android development and solved many problems. However there is still some boilerplate left, therefore even if this could be “perfect” solution, other options might be more suitable for your team. At the same time we start to have problems with other dependencies and we need to figure out how to actually pass them into the factory together with parameters, creating even more boilerplate.Īssisted Injection is trying to solve this problem and Jake Wharton covered this topic in his talk at Droidcon London 2018.
Variable names can be used as if they were positions in the data frame, so expressions like x:y can be used to select a range of variables. :- One or more unquoted expressions separated by commas. It requires extra code to hook into the ViewModelFactory in a way that we could pass dynamic parameters. Parameters:-data:-A data frame, data frame extension, or a lazy data frame.
➕Whole public API is one method contacts() ➕ViewModel accepts parameters in constructor, immutable and nicely testable. lazy is a function defined in kotlin package which takes a lambda or higher-order function as a parameter and returns Lazy➖Not trivial to implement and understand, boilerplate needed.
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