Android xml tools code#
You can't really indent your code to reflect the elements hierarchy on your screens.
Android xml tools android#
If you construct your Android app without XML, you programmatically append children to their parent. The layout relationships between elements are immediately visible. The biggest advantage of writing your app's in XML, in terms of readability, is that XML is structured in hierarchy. And keep in mind that layout code in Android can get very verbose, so no matter how beautifully your code would be written, no one really wants to onboard themselves a project that forces them to read a class with 1000+ lines of code for every single Android activity. But what happens when a second developer gets in the picture? He or she would have to not only understand your code, but also sift view code from behavior code (see point #1) and try to get inside your head and decipher what crossed your mind when you had constructed the code. You might even break down the views' construction into methods, create beautiful abstractions, re-use components and code with state-of-the-art design patterns. This, too, should be a compelling reason.Ĭode Readability - if you aren't convinced yet, and you write your app as an individual developer, then surely you can understand your own code.
Would you rather see your layout changes in split seconds or wait a minute or two for the AVD (Android Virtual Device) or your debugging device to get the compiled app up and running? Is it even running, or do you have a bug somewhere? It is a few orders of magnitude faster to define your Android layout in XML. As a side note, there might be tools/plugins that preview your layout based on Java/Kotlin code only, but I'm not aware of them. If you were to code your whole app inside the activity classes only, you'd probably have to compile the app each time you want to review your layout changes, and that's beyond inefficient. Speed of Development - Android Studio, like other modern IDE's that support Android development, allows you to preview your layout based on your XML file without compiling the whole app. Separation of responsibilities should be a compelling reason to use XML for your Android app's activities. You see all your components in one place, and if need be, you access them from the activity's Java/Kotlin class and manipulate them programmatically ( e.g. While you might not be able to kick out 100% of layout-related settings from your Java (or Kotlin) code, the layout itself would be defined by an activity's XML file. Proper Separation of Responsibilities - programs with UI are preferably implemented with a clear separation between how an interface looks and how an interface behaves. Here's why it's not advisable to write a pure Java/Kotlin Android app: I'm slightly late for the party, but here are my two cents on the matter, and I've been lucky enough to answer this question for someone who wrote a large app with 70+ screens and tons of business logic purely in Java.
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