RubotoでのAsyncTaskサンプル

async_task_activity.rb

require 'ruboto/widget'
require 'ruboto/util/toast'

ruboto_import_widgets :Button, :LinearLayout, :TextView

java_import 'android.os.AsyncTask'
# Thread.sleepを使いたいため追加
java_import 'java.lang.Thread'


class AsyncTaskActivity
  attr_accessor :status

  def onCreate(bundle)
    super

    view = 
      linear_layout orientation: :vertical do
        @status = text_view text: 'before', text_size: 48
        button text: 'start', on_click_listener: MyClickListener.new(self)
      end

    self.content_view = view
  end
end


class MyClickListener
  def initialize(activity)
    @activity = activity
  end

  def onClick(view)
    task = MyTask.new
    task.add_activity(@activity)
    task.execute ''
  end
end


class MyTask < AsyncTask
  def add_activity(activity)
    @activity = activity
  end

  def doInBackground(params)
    Thread.sleep(1000)
    'after'
  end

  def onPostExecute(result)
    @activity.status.text = result
    @activity.toast 'done!'
  end
end