Ruboto horizontal progress bar?

Question

I'm very new to Android development (therefore to Ruboto), I have the following code in an attempt to display a text field, a button, and a progress bar. I would like to turn this progress bar into a horizontal progress bar:

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

ruboto_import_widgets :Button, :LinearLayout, :TextView, :ProgressBar

class SplashActivity
  def onCreate(bundle)
    super
    set_title 'some title here'

    self.content_view =
        linear_layout :orientation => :vertical do
          @text_view = text_view :text => 'sample text.', :id => 42, 
                                 :layout => {:width => :match_parent},
                                 :gravity => :center, :text_size => 18.0
          button :text => 'foo', 
                 :layout => {:width => :match_parent},
                 :id => 43, :on_click_listener => proc { bar }
          progress_bar
        end
  rescue Exception
    puts "Exception creating activity: #{$!}"
    puts $!.backtrace.join("\n")
  end

  private

  def bar
    @text_view.text = 'things change.'
    toast 'cha-ching!'
  end

end

All elements display as expected. The progress_bar is the indeterminate mode by default, what attributes are needed to convert the progress_bar into horizontal?

I have found Ruboto has been super easy to pick up, I just cannot find enough API documentation for customized controls. A lot of the functionality I'm looking for in the application I'm developing could be found in the GitHub source, but a lot is commented out. Is there something I am overlooking for detailed API documentation?

Answer 1

There is no setter for style on ProgressBar, so you have to set it at creation time in the constructor. Note that SplashActivity can conflict with the Ruboto SplashActivity.java, so I use another name (ProgressBarActivity)

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

ruboto_import_widgets :Button, :LinearLayout, :TextView, :ProgressBar

class ProgressBarActivity
  AndroidAttr = JavaUtilities.get_proxy_class('android.R$attr')

  def onCreate(bundle)
    super
    set_title 'some title here'

    self.content_view =
        linear_layout :orientation => :vertical do
          @text_view = text_view :text => 'sample text.', :id => 42,
              :layout => {:width => :match_parent},
              :gravity => :center, :text_size => 18.0
          button :text => 'foo',
              :layout => {:width => :match_parent},
              :id => 43, :on_click_listener => proc { bar }
          @pb = ProgressBar.new(self, nil, AndroidAttr::progressBarStyleHorizontal)
          @view_parent.add_view @pb
        end
  rescue Exception
    puts "Exception creating activity: #{$!}"
    puts $!.backtrace.join("\n")
  end

  def onResume
    super
    @pb.progress = @pb.max / 2
  end

  private

  def bar
    @text_view.text = 'things change.'
    @pb.progress = 2 * @pb.max / 3
    toast 'cha-ching!'
  end

end