Install ruboto-irb
Mobile
- Innovation
- Lucrative
- Objective-C, Java
Apple
- No Ruby for you!
Android
- JVM!
Android API
- Activity
- View
- BroadcastReceiver
- Service
- XML config
Callbacks
public void Activity.onCreate(Bundle bundle)
public void Activity.onPause()
public void onClick(View view)
handle_create do |bundle|
handle_pause do
handle_click do |view|HOW?
Java API
- YourActivity < Activity
- You implement callback methods
Ruboto
- YourActivity < RubotoActivity < Activity
- RubotoActivity implements callbacks
- They tell Ruby to exec blocks, pass params along
Ruboto
Origin
Ruboto-irb
- Charles Nutter
- IRB
- Scripts
Limitations
- Activities only
- Can't ship .apk of a script
- Just write scripts--not the XML config
Ruboto-core
Goals
- Do anything you could do with Java
- Write 0 Java
- Plugins
- Write 0 XML
Demo
Prerequisites
- JDK
- JRuby (rvm)
- Android SDK
- Generate an emulator
- gem install ruboto-core
Generate App
$ ruboto gen app \
$ --package com.danieljackoway.rubyconfx \
$ --path rubyconfx \ # where app files go
$ --name HelloWorld \ # Name of app
$ --target android-8 \ # Froyo
$ --activity HiActivity # Name of Activity
(remove comments)
- Basically same args as
android create project
assets/scripts/hi_activity.rb
require 'ruboto.rb'
ruboto_import_widgets :TextView,
:LinearLayout, :Button
$activity.handle_create do |bundle|
setTitle 'This is the Title'
#...assets/scripts/hi_world.rb (cont'd)
setup_content do
linear_layout :orientation => LinearLayout::VERTICAL do
@text_view = text_view :text => "What hath Matz wrought?"
button :text => "M-x butterfly", :width => :wrap_content
end
end
handle_click do |view|
if view.getText == 'M-x butterfly'
@text_view.setText "What hath Matz wrought!"
toast 'Flipped a bit via butterfly'
end
end
end #close handle_create block (prev slide)Install
- $ rake install # builds .apk, installs to emulator
$ rake; adb -d install -r bin/*-debug.apk
Must use JRuby's rake
- $ jruby -S rake ...
- $ rvm use jruby
rake update_scripts
Accelerometer Demo
Mirah
- Charles Nutter
- JVM language
- Ruby-like syntax
- Statically-typed
- No runtime dependencies
Hello World
@name = "world"
puts "Hello, #{@name}!"Fibonacci
def fib(a:fixnum)
if a < 2
a
else
fib(a - 1) + fib(a - 2)
end
endmirahc --java fib.mirah
// Generated from fib.mirah
public class Fib extends java.lang.Object {
public static void main(java.lang.String[] argv) {
}
public static int fib(int a) {
// normally one line
return (a < 2) ? (a) :
((Fib.fib((a - 1)) + Fib.fib((a - 2))));
}
}
Scripting Layer for Android
- "scripts have access to many of the APIs available to full-fledged Android applications"
- "greatly simplified interface"
- Python, Perl, JRuby, Lua, BeanShell, JavaScript, Tcl, and shell
- Planning to add more languages
- Great project
- Different approach
Ways Ruboto Can Win
- Ruby
rake update_scripts- Abstractions
HELP
- Use it
- Complain
- Contribute Docs
- Fork
- (Soon) Write Plugins
Domo Arigato
- Charles Nutter
- Ruby Summer of Code sponsors
- Early Contributors: Scott Moyer, Jan Berkel, Jay McGavern
Questions?
- Ask now
- Find me later
Links
- http://blog.danieljackoway.com/rubyconf-2010