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Neko: The Clojure/Android Toolkit | ||
================================= | ||
Daniel Solano_Gómez | ||
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Neko is a toolkit designed to make Android development using Clojure easier and | ||
more fun. It accomplishes this by making adding Clojure support to your | ||
Android project easy and providing functional wrappers and alternatives to | ||
Android’s Java API. | ||
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Features | ||
-------- | ||
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WARNING: Note that the libraries are under heavy development. APIs are subject | ||
to change. In particular, `neko.threading` will be changed. | ||
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The toolkit comes as two components: | ||
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. Simplified build support for Clojure using Android’s Ant-based build system, | ||
and | ||
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. The following Clojure libraries: | ||
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* `neko.compilation` helps set up dynamic compilation. | ||
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* `neko.context` helps retrieve resources from the application’s context. | ||
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* `neko.listeners` contains namespaces that take the tedium to adding | ||
callback code to various widgets. | ||
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* `neko.log` interns functions that make logging from your code clean and | ||
simple. | ||
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* `neko.threading` will contain utilities to manage asynchronous tasks and | ||
working with UI threads. | ||
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=== Requirements === | ||
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Using Neko requires the following: | ||
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Clojure:: | ||
Other versions have not been tested. If you would like to use dynamic | ||
compilation or support API level 7 (2.1/Eclair), you will need to use the | ||
Clojure from branch `android-1.2.x` available from | ||
https://github.com/sattvik/clojure/tree/android-1.2.x[this repository on | ||
GitHub]. | ||
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Android SDK Tools:: | ||
Neko has been developed with the latest revision of the Android SDK tools, | ||
and is compatible with r14 and up of the Android SDK. | ||
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WARNING: Revision 14 of the Android SDK introduced some major changes in the | ||
Ant build system. Neko has been updated to use the new build system. You will | ||
probably need to change your project if you have been using an older version of | ||
Neko/SDK. For more detailed information, check the | ||
http://tools.android.com/recent/buildchangesinrevision14[Android Tools Project | ||
Site]. | ||
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Android Platform SDK 7 (2.1/Eclair) or newer:: | ||
In order to maintain backwards-compatibility, Neko does not support any APIs | ||
for newer versions of the platform. | ||
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Use | ||
--- | ||
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The following instructions should help you to add Clojure support to your | ||
project’s build and allow you to use the libraries within your application. | ||
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=== Build support === | ||
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To use Neko’s build support for Clojure, you will need to make two | ||
modifications to your project’s `build.xml` file. | ||
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. You must add a line to similar to the following *before the line with | ||
`<import file="${sdk.dir}/tools/ant/build.xml" />`*. | ||
+ | ||
---- | ||
<import file="/path/to/neko/build-support/clojure.xml"/> | ||
---- | ||
+ | ||
The important thing is that the value of the `file` attribute should resolve | ||
to the `clojure.xml` in the `build-support` directory of this | ||
repository. It may be either a relative or absolute path. | ||
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. You must find the line that reads `<!-- version-tag: 1 -->` and change the | ||
`1` to `custom`. If you do not do this, Android may overwrite your changes. | ||
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For most projects, that is all you have to do. So long as your Clojure source | ||
files are in `src/clojure` and you have placed a Clojure JAR file in | ||
`libs`, Ant will now automatically find and compile all of your Clojure code. | ||
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==== Reflection warnings ==== | ||
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To enable reflection warnings during compilation, simply set the | ||
`clojure.warn.reflection` property to `true`. | ||
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==== `clojure.properties` ==== | ||
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You can place a `clojure.properties` file in the same directory as the | ||
`clojure.xml` file. This file will be sourced and used in any project in which | ||
you have enabled Clojure support. | ||
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==== Test and library projects ==== | ||
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If your project is a test or library project, you should not place a copy of | ||
the Clojure library in the `libs` directory. If you do this, when building an | ||
application that uses your library or when building your test project, the `dx` | ||
tool will fail due to multiple inclusions of the same Clojure classes. | ||
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In these circumstances, you should either set a `clojure.jar` property in your | ||
project’s `build.properties` file or in the `clojure.properties` file as | ||
described in the previous section. | ||
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Also, if you are developing an Android library project, you should add the | ||
following line to your `build.properties` file: | ||
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---- | ||
source.dir=src/java | ||
---- | ||
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This will ensure that your Clojure sources are not inadvertently included in | ||
any applications that use your library. | ||
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=== Libraries === | ||
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Neko is packaged as an Android library project. This makes it easy to add the | ||
libraries to your application if you are using Android’s build system. | ||
Essentially, all you have to do is add a line to your project’s | ||
`build.properties` similar to the following: | ||
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||
---- | ||
android.library.reference.1=/path/to/neko | ||
---- | ||
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Where the path is either absolute or relative and resolves to the base | ||
directory for Neko. To learn more about Android library projects, you can read | ||
the SDK documentation for referencing a library project in | ||
http://developer.android.com/guide/developing/projects/projects-eclipse.html#ReferencingLibraryProject[Eclipse] | ||
or | ||
http://developer.android.com/guide/developing/projects/projects-cmdline.html#ReferencingLibraryProject[from | ||
the command line]. | ||
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Legal information | ||
----------------- | ||
Copyright © 2011 Sattvik Software & Technology Resources, Ltd. Co. + | ||
All rights reserved. | ||
=== Eclipse Public License - v 1.0 === | ||
THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC | ||
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+ | ||
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// vim:set spell ft=asciidoc: |
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