A tool for writing Android applications in Mirah.
You must have the Android SDK installed with the
tools/ directory placed on your $PATH.
tools/ directory, the
android program will allow you to download "platform" packages corresponding with the Android versions you wish to develop against. You'll need to install "Android SDK Platform Tools" and at least one platform revision to get started. At the time of this writing, Android 2.3.3 (revision 10) and above covers 100% of the market and is a reasonable target for new applications.
Once the platform tools are installed, place the SDK's
platform-tools/ directory on your $PATH.
You will also need the following tools installed before you can develop with Pindah:
Pindah has been successfully tested with the following JRuby and Mirah combinations:
Ruby version management
While Linux users can obtain OpenJDK from their distribution, it is recommended that all users utilize something like rbenv, rvm, or uru to manage their Ruby installations and gems:
# rbenv $ rbenv install jruby-1.7.4 $ rbenv --global jruby-1.7.4 $ gem install rake mirah # rvm $ rvm install jruby-1.7.4 $ gem install rake mirah
To install the latest stable version of Pindah, simply install the gem from the command line:
gem install pindah
If you want to play with the latest development version, clone the repo onto your local machine:
$ git clone git://github.com/mirah/pindah $ cd pindah/ $ gem build pindah.gemspec $ gem install pindah-0.1.4.dev.gem
Similar to other Ruby projects like Rails or Ruboto, the
pindah executable is responsible for creating and configuring your new Android project(s). To get started with a simple project, call the
pindah command like so:
pindah create org.example.hello_world
This will create an empty skeleton project with the package name
org.example.hello_world in the current directory.
You can also configure your project with the following options:
To create your project in a specific location, specify an optional path for your new project:
pindah create org.example.hello_world path_to_project
To create and configure a basic initial activity for your project, specify an activity name after the path:
pindah create org.example.hello_world path_to_project StartActivity
All other project management tasks are handled by rake. For a summary of all possible tasks you can run on your new project, run
rake -T from your project directory:
$ rake -T rake clean # Removes output files created by other targets. rake compile # Run compile rake debug # Builds the application and signs it with a debug key. rake install # Installs the newly build package. rake installd # Installs (only) the debug package. rake installi # Installs (only) the instrumented package. rake installr # Installs (only) the release package. rake installt # Installs (only) the test and tested packages. rake instrument # Builds an instrumented packaged. rake javac # Compiles R.java and other gen/ files. rake logcat # Tail logs from a device or a device or emulator rake release # Builds the application in release mode. rake release_unsigned # Builds the application in release mode. rake spec # Print the project spec rake test # Runs tests from the package defined in test.package property rake uninstall # Uninstalls the application from a running emulator or device.
Pindah follows the default Android directory structure when creating new projects:
$ pindah create org.example.hello_world hello_world/ StartActivity Created 'hello_world/src/org/example/hello_world'. Created 'hello_world/bin'. Created 'hello_world/libs'. Created 'hello_world/res'. Created 'hello_world/res/drawable-hdpi'. Created 'hello_world/res/drawable-ldpi'. Created 'hello_world/res/drawable-mdpi'. Created 'hello_world/res/layout'. Created 'hello_world/res/values'. Created project in hello_world. $ cd hello_world && tree . |-- AndroidManifest.xml |-- libs |-- Rakefile |-- res | |-- drawable-hdpi | | `-- ic_launcher.png | |-- drawable-ldpi | | `-- ic_launcher.png | |-- drawable-mdpi | | `-- ic_launcher.png | |-- layout | | `-- main.xml | `-- values | `-- strings.xml `-- src `-- org `-- example `-- hello_world `-- StartActivity.mirah 12 directories, 8 files
Here are a few quick notes about the directory structure pictured above:
AndroidManifest.xmlfile describes the contents and metadata of your application.
res/directory contains application resources like icons, layout descriptions, and strings.
srcdirectory contains the Java and Mirah source code for your project.
Other Android-specific directories may be created and used outside of this structure, as needed. Please refer to the official Android documentation for more information about supported project file types and directory names.
Compiling and running
To compile your new project in debug mode, simply run
rake debug from your project directory:
$ rake debug # [...] $ ls -l bin/hello_world-debug.apk -rw-r--r-- 1 user user 13222 Feb 7 23:16 bin/hello_world-debug.apk
This .apk file may be installed on a connected device or emulator with
rake installd. It may even distributed for users to install themselves, though stable versions should be built with the
The official documentation has more details on building. The main difference between Pindah and the standard Ant build is that the
build.xml as well as all the properties files. The Android Developer page above also explains how to get an emulator running for testing your application.
See Garrett for an example of a basic project.
To contribute to Pindah, you need the required environment setup. You can get tests with the following set of commands.
$ git clone firstname.lastname@example.org:mirah/pindah.git $ bundle install $ rake test
Problems? Suggestions? Bring them up on the Mirah mailing list or the #mirah IRC channel on freenode.
If Mirah is just too low-level for your needs or you simply prefer something more dynamic, you can try Ruboto. Just be warned that it typically incurs a higher performance penalty and requires a larger app memory footprint due to JRuby's runtime.
Released under the Apache 2.0 license.
Copyright (c) 2011 Phil Hagelberg, Nick Plante, J.D. Huntington