Ruboto at GDG Oslo 2013

1Saturday, January 26, 13

Ruboto

JRuby on Android


Uwe Kubosch

Work at Datek Wireless in Norway

Ruboto core developer

JRuby rookie committer


Ruboto?

Platform for developing Android apps using Ruby

Builds on JRuby and the Android SDK

Application and component generators

Test framework

Compact GUI definition


_why Ruboto?

Write Ruby instead of Java/XML

Use Ruby libraries (gems)

Focus on testing

Faster development cycles


Topics covered

History

Ruboto IRB

Installation & development tools

Hello world!

Demos

Limitations

Roadmap


Activity: A screen

View: A screen component

Service: Background process

Intent: Definition of action

BroadcastReceiver: Listener for Intents

Android basics/terms


History 2009

PoC by Charles Nutter (headius) February 24, 2009

ruboto-irb by headius August 1, 2009


History 2009




History 2009




History 2009




History 2009




Demo: OpenGL


Demo: OpenGL

class Cube def initialize one = 0x10000 vertices = [ -one,-one,-one,one,-one,-one,one,one,-one,-one,one,-one,-one,-one,one,one,-one,one,one,one,one,-one,one,one ] colors = [ 0,0,0,one,one,0,0,one,one,one,0,one,0,one,0,one,0,0,one,one,one,0,one,one,one,one,one,one,0,one,one,one ] indices = [ 0, 4, 5, 0, 5, 1, 1, 5, 6, 1, 6, 2, 2, 6, 7, 2, 7, 3, 3, 7, 4, 3, 4, 0, 4, 7, 6, 4, 6, 5, 3, 0, 1, 3, 1, 2 ] vbb = ByteBuffer.allocateDirect(vertices.length*4) vbb.order(ByteOrder.nativeOrder) @vertex_buffer = vbb.asIntBuffer @vertex_buffer.put(vertices.to_java(:int)) @vertex_buffer.position(0) cbb = ByteBuffer.allocateDirect(colors.length*4) cbb.order(ByteOrder.nativeOrder) @color_buffer = cbb.asIntBuffer @color_buffer.put(colors.to_java(:int)) @color_buffer.position(0) @index_buffer = ByteBuffer.allocateDirect(indices.length) @index_buffer.put(indices.to_java(:byte)) @index_buffer.position(0) end def draw(gl) gl.glFrontFace(GL10::GL_CW) gl.glVertexPointer(3, GL10::GL_FIXED, 0, @vertex_buffer) gl.glColorPointer(4, GL10::GL_FIXED, 0, @color_buffer) gl.glDrawElements(GL10::GL_TRIANGLES, 36, GL10::GL_UNSIGNED_BYTE, @index_buffer) end end

class RubotoGLSurfaceViewRenderer def initialize @translucent_background = false @cube = Cube.new @angle = 0.0 @offset = 1.2 end def onDrawFrame(gl) gl.glClear(GL10::GL_COLOR_BUFFER_BIT | GL10::GL_DEPTH_BUFFER_BIT) gl.glMatrixMode(GL10::GL_MODELVIEW) gl.glLoadIdentity gl.glTranslatef(0, 0, -3.0) gl.glRotatef(@angle, 0, 1, 0) gl.glRotatef(@angle*0.25, 1, 0, 0) gl.glEnableClientState(GL10::GL_VERTEX_ARRAY) gl.glEnableClientState(GL10::GL_COLOR_ARRAY) @cube.draw(gl) gl.glRotatef(@angle*2.0, 0, 1, 1) gl.glTranslatef(0.5, 0.5, 0.5) @cube.draw(gl) @angle += @offset end def onSurfaceChanged(gl, width, height) gl.glViewport(0, 0, width, height) ratio = width.to_f / height.to_f gl.glMatrixMode(GL10::GL_PROJECTION) gl.glLoadIdentity gl.glFrustumf(-ratio, ratio, -1, 1, 1, 10) end def onSurfaceCreated(gl, config) gl.glDisable(GL10::GL_DITHER) gl.glHint(GL10::GL_PERSPECTIVE_CORRECTION_HINT, GL10::GL_FASTEST) if (@translucent_background) gl.glClearColor(0,0,0,0) else gl.glClearColor(1,1,1,1) end gl.glEnable(GL10::GL_CULL_FACE) gl.glShadeModel(GL10::GL_SMOOTH) gl.glEnable(GL10::GL_DEPTH_TEST) end def changeAngle @offset = -@offset end end

ruboto_generate(android.opengl.GLSurfaceView => "TouchSurfaceView") class TouchSurfaceView def initialize(context) super context self.initialize_ruboto_callbacks do def on_touch_event(event) if event.getAction == MotionEvent::ACTION_DOWN @renderer.changeAngle request_render end return true end end end def renderer= renderer @renderer = renderer super renderer end end

$activity.start_ruboto_activity "$glsurface" do setTitle "GLSurfaceView" def on_create(bundle) @surface_view = TouchSurfaceView.new(self) @surface_view.renderer = RubotoGLSurfaceViewRenderer.new self.content_view = @surface_view end def on_resume @surface_view.on_resume end def on_pause @surface_view.on_pause end end


Demo: OpenGL


History 2010

ruboto-core : GSoC 2010 by Daniel Jackoway

Version 0.0.3 released December 19, 2010


History 2011

Testing framework: Feb 13, 2011 (my first contribution)

Bundler support: may 21, 2011

New Logo & Icons by RedNifre: july 20, 2011

RubotoCore platform package: august 2011

Rename to just “ruboto”: december 24, 2011


History 2011

Testing framework: Feb 13, 2011 (my first contribution)

Bundler support: may 21, 2011

New Logo & Icons by RedNifre: july 20, 2011

RubotoCore platform package: august 2011

Rename to just “ruboto”: december 24, 2011


History 2012

Class oriented component definition, 2012

On-device generation of subclasses may 10, 2012

Subclassing of Java classes (next release)


History 2012




$activity.handle_create do |bundle| setTitle ‘Hello World!’ setup_content do linear_layout :orientation => LinearLayout::VERTICAL do @text_view = text_view :text => 'What hath Matz wrought?' button :text => ‘Click me!’, :width => :wrap_content, :id => 43 end end handle_click do |view| if view.id == 43 @text_view.setText 'What hath Matz wrought!' toast 'Flipped a bit via butterfly' end end end


History 2012





$activity.start_ruboto_activity do def on_create(bundle) setTitle ‘Hello World!’

click_handler = proc do |view| @text_view.setText 'What hath Matz wrought!' toast 'Flipped a bit via butterfly' end self.content_view = linear_layout :orientation => LinearLayout::VERTICAL do @text_view = text_view :text => 'What hath Matz wrought?' button :text => ‘Click me!, :width => :wrap_content, :on_click_listener => click_handler end end end


History 2012





$activity.start_ruboto_activity do def on_create(bundle) setTitle ‘Hello World!’

click_handler = proc do |view| @text_view.setText 'What hath Matz wrought!' toast 'Flipped a bit via butterfly' end self.content_view = linear_layout :orientation => LinearLayout::VERTICAL do @text_view = text_view :text => 'What hath Matz wrought?' button :text => ‘Click me!, :width => :wrap_content, :on_click_listener => click_handler end end end

class ImageButtonActivity def on_create(bundle) super set_title ‘Hello World!’ click_handler = proc do |view| @text_view.setText 'What hath Matz wrought!' toast 'Flipped a bit via butterfly' end self.content_view = linear_layout :orientation => :vertical do @text_view = text_view :text => 'What hath Matz wrought?' button :text => ‘Click me!’, :width => :wrap_content, :id => 43, :on_click_listener => click_handler end end end


History 2012





History 2012




require 'ruboto/generate' ruboto_generate("android.widget.ArrayAdapter" => $package_name + ".MyArrayAdapter")

adapter = MyArrayAdapter.new(self, android.R.layout.simple_list_item_1 , [...]) adapter.initialize_ruboto_callbacks do def get_view(position, convert_view, parent) @inflater ||= context.getSystemService(Context::LAYOUT_INFLATER_SERVICE) row = convert_view ? convert_view : @inflater.inflate(mResource, nil) row.findViewById(mFieldId).text = get_item(position) row end end


History 2012




require 'ruboto/generate' ruboto_generate("android.widget.ArrayAdapter" => $package_name + ".MyArrayAdapter")

adapter = MyArrayAdapter.new(self, android.R.layout.simple_list_item_1 , [...]) adapter.initialize_ruboto_callbacks do def get_view(position, convert_view, parent) @inflater ||= context.getSystemService(Context::LAYOUT_INFLATER_SERVICE) row = convert_view ? convert_view : @inflater.inflate(mResource, nil) row.findViewById(mFieldId).text = get_item(position) row end end

class MyArrayAdapter < android.widget.ArrayAdapter def get_view(position, convert_view, parent) @inflater ||= context.getSystemService(Context::LAYOUT_INFLATER_SERVICE) row = convert_view ? convert_view : @inflater.inflate(mResource, nil) row.findViewById(mFieldId).text = get_item(position) row end end

adapter = MyArrayAdapter.new(self, android.R.layout.simple_list_item_1, [...])


Installation

Android toolset: Java JDK, Apache ANT, Android SDK + Platform SDK

A Ruby implementation

[sudo] gem install ruboto


Tooling

The “ruboto” command

Rake


Tooling - create project

ruboto gen app --package my.cool.super_app


Tooling - create project

The “ruboto” command

ruboto gem app --package my.cool.

Rake based

$ ruboto gen app --package my.cool.super_appGenerating Android app SuperApp in /Users/uwe/workspace/jruby/super_app......Added file super_app/src/my/cool/super_app/SuperAppActivity.java...Added file super_app/res/values/strings.xmlAdded file super_app/res/layout/main.xmlAdded file super_app/AndroidManifest.xmlAdded file super_app/build.xmlAdded file super_app/proguard-project.txtRemoved file src/my/cool/super_app/SuperAppActivity.javaRemoved file res/layout/main.xml...Added file /Users/uwe/workspace/jruby/super_app/src/my/cool/super_app/SuperAppActivity.java.Added file /Users/uwe/workspace/jruby/super_app/src/super_app_activity.rb.Added file /Users/uwe/workspace/jruby/super_app/test/src/super_app_activity_test.rb.


Tooling - create component

ruboto gen class Activity --name MyActivity


Tooling - create component

ruboto gen class Activity --name MyActivity

$ ruboto gen class Activity --name MyActivityAdded file /Users/uwe/workspace/jruby/hello_world/src/presentation/hello_world/MyActivity.java.Added file /Users/uwe/workspace/jruby/hello_world/src/my_activity.rb.Added file /Users/uwe/workspace/jruby/hello_world/test/src/my_activity_test.rb.Added activity to manifest.


Tooling - build APK

rake debug

rake release


Tooling - Install and run APK

rake install

rake start

rake install start

rake update_scripts:restart


http://download.eclipse.org/releases/juno

https://dl-ssl.google.com/android/eclipse/

Eclipse












Eclipse










GUI Editor

Eclipse


Hello World!


Hello world!


Hello world!

$ android create project --target android-8 --path hello_world --package presentation.hello_world --activity HelloWorldActivityGenerates file src/presentation/HelloWorldActivity.java


Hello world!

$ android create project --target android-8 --path hello_world --package presentation.hello_world --activity HelloWorldActivityGenerates file src/presentation/HelloWorldActivity.java


Hello world!

$ android create project --target android-8 --pat...Generates file src/presentation/HelloWorldActivity.java

package com.example.examplejavaxml;

import android.os.Bundle;import android.app.Activity;import android.view.View;import android.widget.TextView;

public class HelloWorldActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_hello_world); }

public void changeIt(View view) { TextView tv = (TextView) findViewById(R.id.textView1); tv.setText("Hello JavaZone!"); }}


Hello world!






<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" >

<TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:text="@string/hello_world" tools:context=".HelloWorldActivity" android:textSize="46dip" />

<Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:layout_marginTop="75dp" android:onClick="changeIt" android:text="Say hello" />

</LinearLayout>


http://schemas.android.com/apk/res/android


http://schemas.android.com/tools


Hello world!







Hello world!












Hello world!












Hello world!












Hello world!











$ ruboto gen app --package presentation.hello_worldGenerates file src/hello_world_activity.rb


Hello world!













Hello world!














public class HelloWorldActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstance State); setContentView(R.layout.activity_hello_world); }


Hello world!

class HelloWorldActivity def on_create(bundle) super setContentView R.layout.activity_hello_world end def change_it(view) tv = findViewById(AndroidIds::textView1) tv.text = "Hello JavaZone!" end end


Hello world!

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" >



</LinearLayout>










<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" >



</LinearLayout>











import android.os.Bundle;import android.app.Activity;import android.view.Gravity;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;import android.widget.TextView;

public class HelloWorldActivity extends Activity implements OnClickListener { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); LinearLayout layout = new LinearLayout(this); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); TextView tv = new TextView(this); tv.setId(42); tv.setText("Hello World!"); LayoutParams tvlp = new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); Button btn = new Button(this); btn.setText("Say hello"); LayoutParams btnlp = new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(this); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); }

public void changeIt(View view) { TextView tv = (TextView) findViewById(42); tv.setText("Hello JavaZone!"); }

@Override public void onClick(View v) { changeIt(v); }}





























































import android.app.Activity;import android.view.Gravity;

import android.view.View.OnClickListener;import android.widget.Button;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;import android.widget.TextView;

class HelloWorldActivity extends Activity implements OnClickListener

public onCreate( savedInstanceState) { super.onCreate(savedInstanceState); layout = new LinearLayout(this); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); tv = new TextView(this); tv.setId(42); tv.setText("Hello World!"); tvlp = new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); btn = new Button(this); btn.setText("Say hello"); btnlp = new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(this); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); }

public changeIt( view) { tv = findViewById(42); tv.setText("Hello JavaZone!"); }

public onClick( v) { changeIt(v); }end










public onCreate( savedInstanceState) { super.onCreate(savedInstanceState); layout = new LinearLayout(this); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); tv = new TextView(this); tv.setId(42); tv.setText("Hello World!"); tvlp = new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); btn = new Button(this); btn.setText("Say hello"); btnlp = new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(this); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); }

public changeIt( view) { tv = findViewById(42); tv.setText("Hello JavaZone!"); }

public onClick( v) { changeIt(v); }end










def onCreate( savedInstanceState) super.onCreate(savedInstanceState); layout = new LinearLayout(this); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); tv = new TextView(this); tv.setId(42); tv.setText("Hello World!"); tvlp = new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); btn = new Button(this); btn.setText("Say hello"); btnlp = new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(this); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); end

def changeIt( view) tv = findViewById(42); tv.setText("Hello JavaZone!"); end

def onClick( v) changeIt(v); endend





! @Override! public void onClick(View v) {! ! changeIt(v);! }}





def onCreate( savedInstanceState) super.onCreate(savedInstanceState); layout = new LinearLayout(this); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); tv = new TextView(this); tv.setId(42); tv.setText("Hello World!"); tvlp = new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); btn = new Button(this); btn.setText("Say hello"); btnlp = new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(this); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); end












def onCreate( savedInstanceState) super.onCreate(savedInstanceState); layout = LinearLayout.new(this); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); tv = TextView.new(this); tv.setId(42); tv.setText("Hello World!"); tvlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); btn = Button.new(this); btn.setText("Say hello"); btnlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(this); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); end












def onCreate( savedInstanceState) super.onCreate(savedInstanceState); layout = LinearLayout.new(this); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); tv = TextView.new(this); tv.setId(42); tv.setText("Hello World!"); tvlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); btn = Button.new(this); btn.setText("Say hello"); btnlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(this); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); end












def onCreate( savedInstanceState) super.onCreate(savedInstanceState); layout = LinearLayout.new(self); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); tv = TextView.new(self); tv.setId(42); tv.setText("Hello World!"); tvlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); btn = Button.new(self); btn.setText("Say hello"); btnlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(self); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); end












def onCreate( savedInstanceState) super.onCreate(savedInstanceState); layout = LinearLayout.new(self); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); tv = TextView.new(self); tv.setId(42); tv.setText("Hello World!"); tvlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); btn = Button.new(self); btn.setText("Say hello"); btnlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(self); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); end










import android.widget.Button;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;import android.widget.TextView;

class HelloWorldActivity < Activity

def onCreate( savedInstanceState) super; layout = LinearLayout.new(self); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); tv = TextView.new(self); tv.setId(42); tv.setText("Hello World!"); tvlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); btn = Button.new(self); btn.setText("Say hello"); btnlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(self); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); end












def onCreate( savedInstanceState) super; layout = LinearLayout.new(self); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); tv = TextView.new(self); tv.setId(42); tv.setText("Hello World!"); tvlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); btn = Button.new(self); btn.setText("Say hello"); btnlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(self); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); end












def onCreate( savedInstanceState) super; layout = LinearLayout.new(self); layout.setGravity(Gravity::CENTER); layout.setOrientation(LinearLayout::VERTICAL); tv = TextView(self).new; tv.setId(42); tv.setText("Hello World!"); tvlp = LayoutParams.new( LayoutParams::WRAP_CONTENT, LayoutParams::WRAP_CONTENT); tvlp.gravity = Gravity::CENTER; tv.setTextSize(46); btn = Button.new(self); btn.setText("Say hello"); btnlp = LayoutParams.new( LayoutParams::WRAP_CONTENT, LayoutParams::WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity::CENTER; btn.setOnClickListener(self); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); end












def onCreate(savedInstanceState) super; layout = LinearLayout.new(self); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); tv = TextView.new(self); tv.setId(42); tv.setText("Hello World!"); tvlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); btn = Button.new(self); btn.setText("Say hello"); btnlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(self); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); end

def changeIt(view) tv = findViewById(42); tv.setText("Hello JavaZone!"); end

def onClick(v) changeIt(v); endend










def onCreate(savedInstanceState) super; layout = LinearLayout.new(self); layout.setGravity(Gravity.CENTER); layout.setOrientation(LinearLayout.VERTICAL); tv = TextView.new(self); tv.setId(42); tv.setText("Hello World!"); tvlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); tvlp.gravity = Gravity.CENTER; tv.setTextSize(46); btn = Button.new(self); btn.setText("Say hello"); btnlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); btnlp.topMargin = 75; btnlp.gravity = Gravity.CENTER; btn.setOnClickListener(self); layout.addView(tv, tvlp); layout.addView(btn, btnlp); setContentView(layout); end

def changeIt(view) tv = findViewById(42); tv.setText("Hello JavaZone!"); end

def onClick(v) changeIt(v); endend







import android.app.Activityimport android.view.Gravity

import android.widget.Buttonimport android.widget.LinearLayoutimport android.widget.LinearLayout.LayoutParamsimport android.widget.TextView


def onCreate(savedInstanceState) super layout = LinearLayout.new(self) layout.setGravity(Gravity.CENTER) layout.setOrientation(LinearLayout.VERTICAL) tv = TextView.new(self) tv.setId(42) tv.setText("Hello World!") tvlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT) tvlp.gravity = Gravity.CENTER tv.setTextSize(46) btn = Button.new(self) btn.setText("Say hello") btnlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT) btnlp.topMargin = 75 btnlp.gravity = Gravity.CENTER btn.setOnClickListener(self) layout.addView(tv, tvlp) layout.addView(btn, btnlp) setContentView(layout) end

def changeIt(view) tv = findViewById(42) tv.setText("Hello JavaZone!") end

def onClick(v) changeIt(v) endend







import android.app.Activityimport android.view.Gravity












import android.view.Gravity


class HelloWorldActivity

























def on_create(savedInstanceState) super layout = LinearLayout.new(self) layout.gravity = Gravity.CENTER layout.orientation = LinearLayout.VERTICAL tv = TextView.new(self) tv.id = 42 tv.text = "Hello World!" tvlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT) tvlp.gravity = Gravity.CENTER tv.text_size = 46 btn = Button.new(self) btn.text = "Say hello" btnlp = LayoutParams.new( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT) btnlp.topMargin = 75 btnlp.gravity = Gravity.CENTER btn.on_click_listener = self layout.add_view(tv, tvlp) layout.add_view(btn, btnlp) setContentView(layout) end

def change_it(view) tv = find_view_by_id(42) tv.text = "Hello JavaZone!" end

def on_click(v) change_it(v) endend































require 'ruboto/widget'

ruboto_import_widgets :Button, :LinearLayout, :TextView


def on_create(savedInstanceState) super self.content_view = linear_layout gravity: :center, orientation: :vertical do text_view text: 'Hello World!', id: 42, text_size: 46, width: :wrap_content, height: :wrap_content, gravity: :center button id: 43, text: "Say hello", width: :wrap_content, height: :wrap_content, gravity: :center, margins: [0,75,0,0], on_click_listener: self end

end













end













end













end












def on_create(savedInstanceState) super self.content_view = linear_layout gravity: :center, orientation: :vertical do @tv = text_view text: 'Hello World!', id: 42, text_size: 46, width: :wrap_content, height: :wrap_content, gravity: :center button id: 43, text: "Say hello", width: :wrap_content, height: :wrap_content, gravity: :center, margins: [0,75,0,0], on_click_listener: proc{@tv.text = ‘Hello JavaZone’} end

end

end









class HelloWorldActivity def on_create(savedInstanceState) super self.content_view = linear_layout gravity: :center, orientation: :vertical do @tv = text_view text: 'Hello World!', id: 42, text_size: 46, width: :wrap_content, height: :wrap_content, gravity: :center button id: 43, text: 'Say hello', width: :wrap_content, height: :wrap_content, gravity: :center, margins: [0,75,0,0], on_click_listener: proc{@tv.text = 'Hello JavaZone'} end endend

























Examples

Make a call

Show webpage

Spycam


Display a web page

import "android.content.Intent"import "android.net.Uri"

class RubotoHomePageActivity def on_resume intent = Intent.new(Intent::ACTION_VIEW) uri = Uri.parse("http://ruboto.org/") intent.setData(uri) startActivity(intent) finish endend


http://ruboto.org

http://ruboto.org

Phone home

import "android.content.Intent"import "android.net.Uri"

class PhoneHomeActivity def on_resume intent = Intent.new(Intent::ACTION_CALL) uri = Uri.parse("tel:5551234") intent.setData(uri) startActivity(intent) finish endenda


Spycam

Access the camera

Show the camera image

Start a WEBrick web server

Serve a new image on each request


Spycam

Access the camera

Show the camera image

Start a WEBrick web server

Serve a new image on each request

require 'monitor'require 'camera_helper'require 'ruboto/util/stack'

class SpycamServer extend MonitorMixin

PORT = 4567 DOC_ROOT = "#{$activity.files_dir.absolute_path}/"

@@server = nil def self.start(activity, server_status_view) Thread.with_large_stack(512) do synchronize do if @@server.nil? activity.run_on_ui_thread { server_status_view.text = "Loading" } require 'webrick' activity.run_on_ui_thread { server_status_view.text = "Loaded" } @@server = WEBrick::HTTPServer.new(:Port => PORT, :DocumentRoot => DOC_ROOT)

@@server.mount_proc('/') do |req, resp| case req.path when '/', 'index.html' CameraHelper.take_picture(activity) resp.content_type = "text/html" resp.body = '<html> <head> <title>Spycam</title> </head> <body> <a href="/"><img src="latest.jpg"></a> </body> </html>' raise WEBrick::HTTPStatus::OK when '/latest.jpg' resp.content_type = "image/jpg" resp.body = $camera_data $camera_data = nil raise WEBrick::HTTPStatus::OK else resp.body = "Unknown path: #{req.path.inspect}" raise WEBrick::HTTPStatus::NotFound end end server = @@server Thread.new{server.start} end activity.run_on_ui_thread { server_status_view.text = "WEBrick started on http://#{get_local_ip_address}:#{PORT}/" } end end end

def self.stop synchronize do if @@server @@server.shutdown sleep 0.1 until @@server.status == :Stop @@server = nil end end end

private

def self.get_local_ip_address ip = $context.get_system_service($context.class::WIFI_SERVICE).connection_info.ip_address return "localhost" if ip == 0 [0, 8, 16, 24].map{|n| ((ip >> n) & 0xff).to_s}.join(".") end

end

require 'ruboto/activity'require 'ruboto/widget'require 'spycam_server'

import android.util.Logimport android.view.Surfaceimport android.view.WindowManager

ruboto_import_widgets :Button, :LinearLayout, :ScrollView, :TextViewruboto_import_widget :SurfaceView, "android.view"

class SpycamActivity def on_create(bundle) rotation = { Surface::ROTATION_0 => 0,Surface::ROTATION_90 => 90,Surface::ROTATION_180 => 180,Surface::ROTATION_270 => 270 }[window_manager.default_display.rotation] self.title = "Spycam #{rotation}" # self.setRequestedOrientation(android.content.pm.ActivityInfo::SCREEN_ORIENTATION_PORTRAIT) window.add_flags(WindowManager::LayoutParams::FLAG_KEEP_SCREEN_ON)

setContentView(linear_layout(:orientation => :vertical) do linear_layout do text_view :text => "Server: " @server_status_view = text_view end linear_layout do text_view :text => "Picture: " @camera_status_view = text_view end

sv = surface_view sv.holder.add_callback RubotoSurfaceHolderCallback.new(rotation) # Deprecated, but still required for older API version sv.holder.set_type android.view.SurfaceHolder::SURFACE_TYPE_PUSH_BUFFERS end) end def set_camera_status(value) @camera_status_view.text = value end

def camera_status=(value) run_on_ui_thread { $activity.set_camera_status value } end

def on_resume SpycamServer.start(self, @server_status_view) end

def on_pause SpycamServer.stop end

end

class RubotoSurfaceHolderCallback def initialize(roation) @rotation = roation end

def surfaceCreated(holder) $camera = android.hardware.Camera.open parameters = $camera.parameters parameters.picture_format = android.graphics.PixelFormat::JPEG parameters.rotation = (360 + (90 -‐ @rotation)) % 360 parameters.set_picture_size(640, 480) $camera.parameters = parameters $camera.preview_display = holder $camera.display_orientation = (360 + (90 -‐ @rotation)) % 360 $camera.start_preview end

def surfaceChanged(holder, format, width, height) end

def surfaceDestroyed(holder) $camera.stop_preview $camera.release $camera = nil endend

class CameraHelper def self.take_picture(activity) activity.camera_status = "Set volume..." am = activity.getSystemService(android.content.Context::AUDIO_SERVICE) old_volume = am.get_stream_volume(android.media.AudioManager::STREAM_SYSTEM) am.set_stream_volume(android.media.AudioManager::STREAM_SYSTEM, 0, 0)

activity.camera_status = "Taking picture..." picture_taken = false $camera.take_picture(nil, nil) do |data, camera| $camera_data = String.from_java_bytes(data) activity.camera_status = "Gotcha!"

$camera.start_preview am.set_stream_volume(android.media.AudioManager::STREAM_SYSTEM, old_volume, 0) picture_taken = true end sleep 0.1 until picture_taken endend


Demo: Spycam


Limitations

Startup time

Tiny stack on main thread

Runtime size

No AOT/JIT compilation


Status

Ruboto is in production!

Monthly releases.

Still improving the API

Support Android 2.1 - 4.2

5 active developers, more welcome!


Status


Monthly releases.





Status


Monthly releases.





Roadmap

1.0.0 release this year

Dalvik backend for the IR compiler

AOT Compilation / IR Persistence

Mirah integration ( http://www.mirah.org )

FFI support

Eclipse plugin


http://www.mirah.org

http://www.mirah.org

Demo (if time allows) Ruboto IRB Server


Contributors welcome!ruboto.org


http://ruboto.org

http://ruboto.org

Questions?


Thank you!


Technology

Ruboto at GDG Oslo 2013