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51 lines
1.7 KiB
Text
51 lines
1.7 KiB
Text
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Images, layout descriptions, binary blobs and string dictionaries can be included
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in your application as resource files. Various Android APIs are designed to
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operate on the resource IDs instead of dealing with images, strings or binary blobs
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directly.
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For example, a sample Android app that contains a user interface layout (main.xml),
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an internationalization string table (strings.xml) and some icons (drawable-XXX/icon.png)
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would keep its resources in the "Resources" directory of the application:
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Resources/
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drawable-hdpi/
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icon.png
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drawable-ldpi/
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icon.png
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drawable-mdpi/
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icon.png
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layout/
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main.xml
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values/
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strings.xml
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In order to get the build system to recognize Android resources, set the build action to
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"AndroidResource". The native Android APIs do not operate directly with filenames, but
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instead operate on resource IDs. When you compile an Android application that uses resources,
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the build system will package the resources for distribution and generate a class called
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"Resource" that contains the tokens for each one of the resources included. For example,
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for the above Resources layout, this is what the Resource class would expose:
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public class Resource {
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public class drawable {
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public const int icon = 0x123;
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}
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public class layout {
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public const int main = 0x456;
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}
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public class strings {
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public const int first_string = 0xabc;
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public const int second_string = 0xbcd;
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}
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}
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You would then use R.drawable.icon to reference the drawable/icon.png file, or Resource.layout.main
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to reference the layout/main.xml file, or Resource.strings.first_string to reference the first
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string in the dictionary file values/strings.xml.
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