Tips: Android design pattern

Design Pattern, a design pattern is a general reusable solution to a commonly occurring problem, In case of Android, I personally feel that existing design patterns like MVC, Abstract Factory,Singleton,etc. are not fit with the Android. Most of design patterns was evolved before the era of Android/Mobile. I think that code should be simple and optimise, does not matter which design pattern you are using. 

In this article I am going to explain few rules/pattern which I am following in my projects.


1. Package Structure
         src 
             com.client.app                   - contain Application class only
             com.client.app.views           - contain all activities
             com.client.app.fragments    - contain all fragments
             com.client.app.webservice   - contain all web services
             com.client.app.adapters      - contain all adapters
             com.client.app.db              - contain all db related classes
             com.client.app.models        - contain all models
             com.client.app.utils            - contain utility/misc classes
             com.client.app.widgets        - contain extended/custom views
             com.client.app.services       - contain all services
             com.client.app.animation     - contain all animations

2. Naming convention for Xml files

• activity_<ACTIVITY NAME>.xml - for all activities
• dialog_<DIALOG NAME>.xml  - for all custom dialogs
• row_<LIST_NAME>.xml - for custom row for listview
• fragment_<FRAGMENT_NAME>.xml - for all fragments

3. Naming convention for component/widget in xml files.

• all component for x activity must be start with activity name
• all component should have prefix or short name like btn for button
• For example,name for login activity component should be like following.
• activity_login_btn_login
• activity_login_et_username
• activity_login_et_password
• Short name of major components
• Button - btn
• EditText - et
• TextView - tv
• Checkbox - chk
• RadioButton - rb
• ToggleButton - tb
• Spinner - spn 
• Menu - mnu
• ListView - lv
• GalleryView - gv
• LinearLayout -ll
• RelativeLayout - rl

4.  Reference links related to Android design pattern / architecture

• Which design patterns are used in Android 
• http://stackoverflow.com/questions/4916209/which-design-patterns-are-used-on-android/6770903#6770903
• Android MVC
• https://github.com/gvaish/Android-MVC
• Android MVP
• http://jamespeckham.com/Blog/10-11-21/MVP_on_Android.aspx
• Android architecture part 1
• http://www.therealjoshua.com/2011/11/android-architecture-part-1-intro/