refactor with attr_{reader,accessor}

android-samples/Timer/app/main_activity.rb

@@ -1,7 +1,5 @@
 class TimerButtonListener < Java::Lang::Object
-  def set_activity(activity)
-    @activity = activity
-  end
+  attr_accessor :activity
 
   def onClick(view)
     @activity.toggleTimer
@@ -9,9 +7,7 @@ class TimerButtonListener < Java::Lang::Object
 end
 
 class TimerTask < Java::Util::TimerTask
-  def set_activity(activity)
-    @activity = activity
-  end
+  attr_accessor :activity
 
   def run
     @activity.handler.post -> { @activity.updateTimer }
@@ -19,6 +15,8 @@ class TimerTask < Java::Util::TimerTask
 end
 
 class MainActivity < Android::App::Activity
+  attr_reader :handler
+
   def onCreate(savedInstanceState)
     super
     @handler = Android::Os::Handler.new
@@ -35,17 +33,13 @@ class MainActivity < Android::App::Activity
     @button = Android::Widget::Button.new(self)
     @button.text = 'Start'
     listener = TimerButtonListener.new
-    listener.set_activity self
+    listener.activity = self
     @button.onClickListener = listener
     layout.addView(@button)
 
     self.contentView = layout
   end
 
-  def handler
-    @handler
-  end
-
   def toggleTimer
     if @timer
       @timer.cancel
@@ -55,7 +49,7 @@ class MainActivity < Android::App::Activity
       @timer = Java::Util::Timer.new
       @counter = 0
       task = TimerTask.new
-      task.set_activity self
+      task.activity = self
       @timer.schedule task , 0, 100
       @button.text = 'Stop'
     end

android-samples/WebViewDemo/app/main_activity.rb

@@ -1,4 +1,6 @@
 class MainActivity < Android::App::Activity
+  attr_reader :webview, :handler
+
   def onCreate(savedInstanceState)
     super
     @handler = Android::Os::Handler.new
@@ -12,27 +14,17 @@ class MainActivity < Android::App::Activity
 
     @webview.webChromeClient = MyWebChromeClient.new
     js_interface = DemoJavaScriptInterface.new
-    js_interface.set_context(self)
+    js_interface.context = self
     @webview.addJavascriptInterface(js_interface, "demo")
 
     @webview.loadUrl("file:///android_asset/demo.html")
 
     self.contentView = @webview
   end
-
-  def webview
-    @webview
-  end
-
-  def handler
-    @handler
-  end
 end
 
 class DemoJavaScriptInterface < Java::Lang::Object
-  def set_context(context)
-    @context = context
-  end
+  attr_accessor :context
 
   __annotation__('@android.webkit.JavascriptInterface')
   def clickOnAndroid