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Sectioned ListView for Android Using Mono C#

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14 Mar 2013CPOL6 min read 39.5K   1.2K   23  
Develop a Preferences style sectioned list adapter using Android Mono C#.
Images, layout descriptions, binary blobs and string dictionaries can be included 
in your application as resource files.  Various Android APIs are designed to 
operate on the resource IDs instead of dealing with images, strings or binary blobs 
directly.

For example, a sample Android app that contains a user interface layout (Main.xml),
an internationalization string table (Strings.xml) and some icons (drawable/Icon.png) 
would keep its resources in the "Resources" directory of the application:

Resources/
    Drawable/
        Icon.png

    Layout/
        Main.axml

    Values/
        Strings.xml

In order to get the build system to recognize Android resources, the build action should be set 
to "AndroidResource".  The native Android APIs do not operate directly with filenames, but 
instead operate on resource IDs.  When you compile an Android application that uses resources, 
the build system will package the resources for distribution and generate a class called
"Resource" that contains the tokens for each one of the resources included. For example, 
for the above Resources layout, this is what the Resource class would expose:

public class Resource {
    public class Drawable {
        public const int Icon = 0x123;
    }

    public class Layout {
        public const int Main = 0x456;
    }

    public class String {
        public const int FirstString = 0xabc;
        public const int SecondString = 0xbcd;
    }
}

You would then use Resource.Drawable.Icon to reference the Drawable/Icon.png file, or 
Resource.Layout.Main to reference the Layout/Main.axml file, or Resource.String.FirstString
to reference the first string in the dictionary file Values/Strings.xml.

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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