Maui controls handlers learning

Question

Hello All. I'm trying to learn how to customize android control. I know the concept of the customizing but my difficult is where I can find learning stuff of the android side what I mean is in the example below where I can find the section that start with .SetBackground Microsoft.Maui.Handlers.EntryHandler.Mapper.AppendToMapping("BoderlessEntry", (handler, view) => { #if ANDROID handler.PlatformView.SetBackgroundColor(Microsoft.Maui.Graphics.Colors.Transparent.ToAndroid()); #elif IOS

Answer 1

Hello,

I notice that you are using EntryHandler, there is a table that lists the types that implement views in .NET MAUI, please see .NET MAUI handlers - .NET MAUI | Microsoft Learn

From the source code, you can see the PlatformView is type of MauiAppCompatEditText, and it's extended from AppCompatEditText. About this native Android control, you could refer to AppCompatEditText | Android Developers

There is no such .NET-Android documentation so far, the missing documents are being collected and sorted. And you could rise an issue at https://github.com/dotnet/docs-maui to tell them your concerns, they will evaluate your needs carefully.

Best Regards,

Wenyan Zhang

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Answer 2

its basically black magic. the customization passes the "wrapped" native instance. the wrapped instance has c# methods generated from the native toolkit. so basically you need to know what native UI object would be passed, and the native object properties (see android java or IOS UIKit documentation). intellisense supplies the rest.

you can read the source code to better understand, or just google for solutions.