Tutorial: dialogfragment

Our goal

Display a dialog fragment in a Ruboto activity.

Prerequisites

• You should have completed the Getting started with Ruboto.
• Read about fragments in the Android developer docs: http://developer.android.com/guide/components/fragments.html
• Read about the DialogFragment: http://developer.android.com/reference/android/app/DialogFragment.html
• Have an emulator running or a device with USB debugging connected.
• The emulator/device must have Android 3 or later.
• Relevant reading https://github.com/jruby/jruby/wiki/GeneratingJavaClasses

This tutorial has been tested with the following setups:

ruboto	RubotoCore	Device	Android	Android SDK	Tester
0.16.0.dev	0.5.6	Emulator	4.1.2	22.2.1	donv

Create your project

ruboto setup -y -t 15
ruboto gen app --package org.ruboto.example.dialog_fragment -t 15
cd dialog_fragment

Prepare the activity and add the dialog fragment

Change src/dialog_fragment_activity.rb to this

require 'ruboto/widget'

ruboto_import_widgets :LinearLayout, :TextView

class DialogFragmentActivity
  def onCreate(bundle)
    super
    set_title 'Dialog Fragment Example'

    self.content_view =
        linear_layout :orientation => :vertical, :gravity => :center do
          text_view :id => 42, :text => title, :text_size => 48.0,
                    :gravity => :center
        end
    ft = getFragmentManager.beginTransaction
    ft.addToBackStack(nil)
    ExampleDialogFragment.new.show(ft, 'example_dialog')
  end
end

class ExampleDialogFragment < android.app.DialogFragment
  def onCreate(bundle)
    super
    @some_var = 'Ruboto does fragments!'
  end

  def onCreateView(inflater, container, bundle)
    dialog.title = @some_var

    linear_layout :orientation => :vertical do
      linear_layout :gravity => :center, :layout => {:width => :fill_parent} do
        text_view :text => @some_var, :id => 43, :text_size => 40.0,
                  :gravity => :center
      end
    end
  end
end

Try it!

rake install start