add Hello android sample (similar to ios/Hello sample)

android-samples/Hello/.gitignore

@@ -0,0 +1,13 @@
+.repl_history
+build
+tags
+.DS_Store
+nbproject
+.redcar
+#*#
+*~
+*.sw[po]
+.eprj
+.sass-cache
+.idea
+.dat*.*

android-samples/Hello/Rakefile

@@ -0,0 +1,11 @@
+# -*- coding: utf-8 -*-
+$:.unshift("../../lib")
+require 'motion/project/template/android'
+
+Motion::Project::App.setup do |app|
+  # Use `rake config' to see complete project settings.
+  app.name = 'Hello'
+  app.api_version = '18' 
+  app.sdk_path = File.expand_path('~/src/android-sdk-macosx')
+  app.ndk_path = File.expand_path('~/src/android-ndk-r9d')
+end

android-samples/Hello/app/main_activity.rb

@@ -0,0 +1,25 @@
+class MainActivity < Android::App::Activity
+  def onCreate(savedInstanceState)
+    super
+
+    @text = Android::Widget::TextView.new(self)
+    @text.text = 'Hello RubyMotion!'
+    @text.textColor = Android::Graphics::Color::WHITE
+    @text.textSize = 40.0
+    self.contentView = @text
+  end
+
+  def dispatchTouchEvent(event)
+    @counter ||= 0
+    case event.getAction
+      when Android::View::MotionEvent::ACTION_UP
+        @counter += 1
+        @text.text = "Touched #{@counter} times!"
+        @text.backgroundColor = Android::Graphics::Color::BLACK
+      when Android::View::MotionEvent::ACTION_MOVE
+        @text.text = "ZOMG!"
+        @text.backgroundColor = Android::Graphics::Color.rgb(rand(255), rand(255), rand(255))
+      end
+    true
+  end
+end