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- 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-XXX/icon.png)
- would keep its resources in the "Resources" directory of the application:
- Resources/
- drawable-hdpi/
- icon.png
- drawable-ldpi/
- icon.png
- drawable-mdpi/
- icon.png
- layout/
- main.xml
- values/
- strings.xml
- In order to get the build system to recognize Android resources, set the build action 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 strings {
- public const int first_string = 0xabc;
- public const int second_string = 0xbcd;
- }
- }
- You would then use R.drawable.icon to reference the drawable/icon.png file, or Resource.layout.main
- to reference the layout/main.xml file, or Resource.strings.first_string to reference the first
- string in the dictionary file values/strings.xml.
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