Rubotoで動的にTextViewを追加・削除するサンプル

dynamic_gui_activity.rb

# encoding: utf-8

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

ruboto_import_widgets :Button, :LinearLayout, :TextView

java_import 'android.util.Log'


class DynamicGuiActivity
  def onCreate(bundle)
    super
    Log.v "LOG", "onCreate"

    addition_click = proc do
      change(toast: true)
    end

    @view = linear_layout orientation: :vertical do
      @text_view = text_view text: 'ボタンを押してね', text_size: 20
      @button_view = button text: '追加', on_click_listener: ClickListener.new(self)
      @toast_view = button text: 'Add with toast', on_click_listener: addition_click
    end

    self.content_view = @view
  end


  def change(args)
    if @display_view.nil?
      @display_view = text_view text: 'Hello World !', text_size: 48
      @view.addView(@display_view)

      @button_view.text = '削除'
      @toast_view.text = 'Remove with toast'
      toast '追加しました' if args[:toast]

    else
      @view.removeView(@display_view)
      @display_view = nil

      @button_view.text = '追加'
      @toast_view.text = 'Add with toast'
      toast '削除しました' if args[:toast]
    end
  end
end


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

  def onClick(view)
    Log.v "LOG", "onClick"
    @activity.change(toast: false)
  end
end