Merge master to restructuring

Author: PaulDaviesC

concept_lessons/_android_activity.html.md

@@ -129,19 +129,3 @@ Now once you saw onRestart, just press the back button, this will exit your appl
 
 Summarizing the chapter, you understood why an Activity Lifecycle exists, what is its importance and what are the different Lifecycle states which an activity goes through.
 
-<br/>
-<div>
-Great ! Now that you have learned about Activities, you can proceed to attempt Codelearn's Twitter App Tutorial
-</div>
-<br/>
-<div>
-<%= link_to app_tutorial_get_started_path("twitter"), :id => "activitybtn", :class => "btn btn-small btn-danger" do %>
-<h6>Learn to build a Twitter app<br/><small style="font-size:small; color:inherit"></small></h6>
-<% end %>
-</div>
-
-
-<script type="text/javascript">
-mixpanel.track_links("#activitybtn", "activityconceptlsn");
-mixpanel.track("activityConceptLesson");
-</script>

concept_lessons/_android_hello_world.html.md

@@ -293,19 +293,3 @@ DDMS also comes with a nice tool of emulator control, this option lets you contr
 *	Mock GPS location to test your application if it is using GPS 
 
 In this chapter, we have learned how to create hello world application and how to launch the same using emulator. Also we saw how to create a virtual device. We also got to learn about the android project folder structure and had a glimpse of the tool to assist us in the faster development.
-
-<br/>
-<div>
-Great ! Now that you have completed this chapter, you can proceed to attempt Codelearn's Twitter App Tutorial
-</div>
-<br/>
-<div>
-<%= link_to app_tutorial_get_started_path("twitter"), :id => "helloworldbtn", :class => "btn btn-small btn-danger" do %>
-<h6>Learn to build a Twitter app<br/><small style="font-size:small; color:inherit"></small></h6>
-<% end %>
-</div>
-
-<script type="text/javascript">
-mixpanel.track_links("#helloworldbtn", "helloworldconceptlsn");
-mixpanel.track("helloWorldConceptLesson");
-</script>

concept_lessons/_android_intent.html.md

@@ -154,18 +154,3 @@ Similar to opening webpage we have shareData method in which you can see how we
 
 In this chapter, we have seen how we can use android intent to communicate between different activities or to pass data. Also, we now know how to use Intents for opening other applications from our app.
 
-<br/>
-<div>
-Great ! Now that you have know about intents, you can proceed to attempt Codelearn's Twitter App Tutorial
-</div>
-<br/>
-<div>
-<%= link_to app_tutorial_get_started_path("twitter"), :id => "intentbtn", :class => "btn btn-small btn-danger" do %>
-<h6>Learn to build a Twitter app<br/><small style="font-size:small; color:inherit"></small></h6>
-<% end %>
-</div>
-
-<script type="text/javascript">
-mixpanel.track_links("#intentbtn", "intentconceptlsn");
-mixpanel.track("intentsConceptLesson");
-</script>

concept_lessons/_android_introduction.html.md

@@ -220,20 +220,3 @@ Typically you never access a database directly. Instead Twitter app may be using
 	<%= image_tag "android-introduction/notifications.png" %>
  </div>
 </div>
-<br/>
-<div>
-Great ! Now that you have completed this chapter, you can proceed to attempt Codelearn's Twitter App Tutorial
-</div>
-<br/>
-<div>
-<%= link_to app_tutorial_get_started_path("twitter"), :id => "introbtn", :class => "btn btn-small btn-danger" do %>
-<h6>Learn to build a Twitter app<br/><small style="font-size:small; color:inherit"></small></h6>
-<% end %>
-</div>
-
-
-
-<script type="text/javascript">
-mixpanel.track_links("#introbtn", "introconceptlsn");
-mixpanel.track("introductionConceptLesson");
-</script>

concept_lessons/_android_layout.html.md

@@ -366,21 +366,3 @@ You can specify width and height with exact measurements, though you probably wo
 * match_parent (referred as fill_parent in API Level 8 and lower) tells your view to become as big as its parent view group will allow.
 
 In general, specifying a layout width and height using absolute units such as pixels is not recommended. Instead, using relative measurements such as density-independent pixel units (dp), wrap_content, or fill_parent, is a better approach, because it helps ensure that your application will display properly across a variety of device screen sizes.
-
-<br/>
-<div>
-Great ! Now that you know about Layouts, you can proceed to attempt Codelearn's Twitter App Tutorial
-</div>
-<br/>
-<div>
-<%= link_to app_tutorial_get_started_path("twitter"), :id => "layoutbtn", :class => "btn btn-small btn-danger" do %>
-<h6>Learn to build a Twitter app<br/><small style="font-size:small; color:inherit"></small></h6>
-<% end %>
-</div>
-
-
-
-<script type="text/javascript">
-mixpanel.track_links("#layoutbtn", "layoutconceptlsn");
-mixpanel.track("layoutsConceptLesson");
-</script>

concept_lessons/_android_listview.html.md

@@ -493,19 +493,3 @@ You can view the ListActivity example in the sample project that you downloaded.
 >Watchout: ListActivity works well if you have only single ListView. In case you have more than one Android listview, you need to put extra code for the other ListView to work. 
 
 You can download the sample app from [here](https://github.com/pranayairan/Code-Learn-Android-Example/tree/master/CodeLearnListExample)
-<div>
-Great ! Now that you know about ListView, It's time to see it in Action by trying our App Tutorial
-</div>
-<br/>
-<div>
-<%= link_to app_tutorial_get_started_path("twitter"), :id => "listviewbtn", :class => "btn btn-small btn-danger" do %>
-<h6>Learn to build a Twitter app<br/><small style="font-size:small; color:inherit"></small></h6>
-<% end %>
-</div>
-
-
-
-<script type="text/javascript">
-mixpanel.track_links("#listviewbtn", "listviewconceptlsn");
-mixpanel.track("listViewConceptLesson");
-</script>

concept_lessons/_android_log.html.md

@@ -123,20 +123,4 @@ The save button next to the log level selection button lets you save the logs in
 
 You can launch LogCat from command line with `adb` command or through a remote adb shell. You should probably head over to [offical Android docs on Logcat](http://developer.android.com/tools/debugging/debugging-log.html#startingLogcat) for this.
 
-<br/>
-<div>
-Great ! Now that you have completed this chapter, you can proceed to attempt Codelearn's Twitter App Tutorial
-</div>
-<br/>
-<div>
-<%= link_to app_tutorial_get_started_path("twitter"), :id => "loggingbtn", :class => "btn btn-small btn-danger" do %>
-<h6>Learn to build a Twitter app<br/><small style="font-size:small; color:inherit"></small></h6>
-<% end %>
-</div>
-
-
 
-<script type="text/javascript">
-mixpanel.track_links("#loggingbtn", "loggingconceptlsn");
-mixpanel.track("loggingConceptLesson");
-</script>

concept_lessons/_android_setup.html.md

@@ -97,21 +97,3 @@ Now that you have your Android IDE up and running, follow the video integrated a
 Great then ! You can proceed to the next chapter for creating your first hello world application !
 
 > Caution :  For Windows 8 , the installation instruction doesn't change much, but sometimes you might encounter some problem in correctly running the ADT. This is mostly due to incorrect installation of the JDK, make sure you install the correct version of JDK by choose the correct version (32-bit or 64 bit).
-
-<br/>
-<div>
-Great ! Now that you have completed this chapter, you can proceed to attempt Codelearn's Twitter App Tutorial
-</div>
-<br/>
-<div>
-<%= link_to app_tutorial_get_started_path("twitter"), :id => "setupbtn", :class => "btn btn-small btn-danger" do %>
-<h6>Learn to build a Twitter app<br/><small style="font-size:small; color:inherit"></small></h6>
-<% end %>
-</div>
-
-
-
-<script type="text/javascript">
-mixpanel.track_links("#setupbtn", "setupbtnconceptlsn");
-mixpanel.track("setupConceptLesson");
-</script>

concept_lessons/_android_views.html.md

@@ -633,20 +633,3 @@ This is how our complete scroll view will look
         </ScrollView>
 
 Android has a lot of UI elements which are designed for specific purposes, in this chapter we tried to cover some of the most used UI elements. If you want to read more about other UI controls, you can go to [this link](http://developer.android.com/guide/topics/ui/index.html)
-
-<br/>
-<div>
-Great ! Now that you have completed this chapter, you can proceed to attempt Codelearn's Twitter App Tutorial
-</div>
-<br/>
-<div>
-<%= link_to app_tutorial_get_started_path("twitter"), :id => "widgetviewsbtn", :class => "btn btn-small btn-danger" do %>
-<h6>Learn to build a Twitter app<br/><small style="font-size:small; color:inherit"></small></h6>
-<% end %>
-</div>
-
-
-<script type="text/javascript">
-mixpanel.track_links("#widgetviewsbtn", "widgetsviewconceptlsn");
-mixpanel.track("widgetsViewsConceptLesson");
-</script>

twitter-client-tutorial/_button_click_listener_module.html.md

@@ -0,0 +1,5 @@
+# Implementing Login Button Click Listener
+
+If you have followed our Twitter App tutorial so far, you have built a login screen with some basic Layouts & View elements. You have added a login button but it does nothing. 
+
+We have created this module specifically for introducing **Click Listener** . As an Android developer, this is the first time you will be dealing with a *callback code snippet* which gets executed when a button is clicked.