Question

我对Android开发很新（因此对Ruboto来说），我有以下代码试图显示文本字段，按钮和进度条。我想将此进度条转换为水平进度条：

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

所有元素均按预期显示。 progress_bar默认情况下是不确定模式，将progress_bar转换为水平需要哪些属性？

我发现Ruboto非常容易上手，我找不到足够的API文档来定制控件。我正在开发的应用程序中寻找的许多功能都可以在GitHub源代码中找到，但很多内容已被注释掉。对于详细的API文档，我有什么东西可以忽略吗？

Answer 1

ProgressBar上没有样式的setter，所以你必须在创建时在构造函数中设置它。请注意，SplashActivity可能与Ruboto SplashActivity.java冲突，因此我使用另一个名称（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

Ruboto横向进度条？

1 个答案: