The main objection regarding the new engine is the fact that you can’t influence your templates any way other than from the plugins. What’s Wrong with the New Kotlin DSL Engine This is why we at hh usually avoid creating them. What is the downside of such templates? You can’t use them to add multiple files at the same time. You can find examples of such templates in the MviCore repository created by our colleagues at Badoo. Let's compare the two approaches:įirst of all, we need to create template.xml for describing our parameters: This is how a user-friendly Kotlin DSL came into existence to describe the templates. ![]() Previously, you had to create additional action plugins to add the same template to several areas in the interface. As the number of templates was growing, so was the number of areas in the interface where you would want to add these templates. After finding that error, you would change the template, and every step had to be repeated in a new cycle. Then, based on the response from Android Studio, you tried to figure out which particular character was used in error. Creating a new template with FreeMarker recipes used to be like Russian roulette before starting it, you never knew for sure whether you described it properly or whether you filled in all the required parameters. In general, it is clear why Google has abandoned this engine. Once the project was started, Android Studio would parse the contents of “ /templates” folder, add more actions to the “ New ->” menu interface, and when an action was called, Android Studio would read the contents of “ template.xml,” build UI, etc. Then all these files would be put to the folder “ Android Studio/plugins/android/lib/templates/ ”. How did template engine work prior to Android Studio 4.1? You would create a folder for the template description, add several files, such as, template.xml, and, to describe parameters and instructions for executing a template, and, in addition, you would also place the FTL templates there to serve as a framework for generated code. So the android plugin in Android Studio was no exception. All new libraries and new apps in Google are gradually being rewritten in Kotlin. Google has long declared Kotlin its preferred language for Android development. When I refer to the template text of generated code, I will use the terms “ FTL templates” or “ FreeMarker templates.” What Replaced FreeMarker? “ Recipe” will mean a set of instructions to be executed after the user enters data. ![]() When using the term “ template,” I’m referring to a set of metadata that is needed to build a dialog for entering user parameters. To reduce confusion and synchronize the understanding of what we’re discussed here, we will introduce a bit of terminology. *Geminio is a spell used to duplicate an object in the Harry Potter universe. In addition, I will describe how the plugins could be used to create your own templates now. You can learn more details on how this plugin works and what is required to configure it in the README file, but only here can you explore its inner mechanics. Delving into the plugins to fix some template? Give me a break, please.Īll this led us to develop a special plugin for Android Studio that will help to address these issues. In hh, we are not particularly happy with this situation, as there is a number of useful FreeMarker templates that we constantly use and which need to be updated once in a while. ![]() As an alternative, we are invited to learn plugin building and create templates from within IDEA plugins. Now you can’t just write your FTL files and put them in a specific folder so that Android Studio can add them to the “New → Other” menu. Starting with Android Studio 4.1, Google ended its support for custom FreeMarker templates.
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