Paul Labis: This is a personal blog where everyone can read my experiences, ideas and thoughts about programming, latest gadgets and other information technology related topics, lifestyle and many other stuff I would like to share to the public.

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Tutorial on Android Views - Part 2

In this article, we will be dealing with another types of Android views. They are the RadioGroup, RadioButton, ProgressBar and AutoCompleteTextView. By learning the following views, it will broaden your understanding on android views that will help you build your own android application. 

Lets start by creating a new android project on eclipse. See the screenshot beside for android project specifics. 
 
RadioGroup and RadioButton
This two views is basically used to let users choose something among available options. RadioButton has two available states. It is either checked or unchecked.  Once a RadioButton is checked, it cannot be unchecked unless its grouped along with other radio button on a RadioGroup. A RadioGroup is a type of view that is used to group one or mmore radio buttons, thereby allows a user to select only one radiobutton or only one option.

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Android Software Competition by Globe Telecom

I first heard this news from Calen Legaspi, our CEO at Orange and Bronze Software Labs, that Globe Labs will host and conduct its first mobile developer event for 2010. I've been hearing about Android platform since 2008 and now, Globe Labs posted an invitation for all developers to explore the new mobile platform.

The event is an Android software competition open for all Filipino developers. This is an invitation to all developers to build their mobile application on top of Android platform.

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by paul

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Tutorial on Android Views - Part 1

On my previous articles, we had a discussion on the android's definition and layout. I assume that you have already learn basics on manipulating android layout. In this and on the next article, we will be exploring and dealing more on the various types of commonly used views such as TextView, EditText, Button, ImageButton, CheckBox and ToggleButton. Those widgets are likely the most commonly used in developing android applications.

Lets begin by creating a new project on eclipse:

After which, create an Android XML under res/layout and name it basicviews.xml having written inside is the following code below:

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by paul

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Tutorial on Android Layout

On my previous article, I've discussed more on the theory and definition of an Android. In this article, we will be dealing more on the technical aspect of developing android application layout. I will walk you through various elements that make up the user interface(UI) and how to position different widgets on an android screen.

Terms to remember:
  • Activity - the basic unit of an android application. It contains views and ViewGroup. 
  • View - a widget that has an appearance on screen.
  • Widget - are user interface components like buttons, labels, text boxes, etc.
  • ViewGroup - a special type of View that provides the layout in which you can group views, order the appearance and sequence your views.
Just an additional information; In a typical android project, UI is defined using an XML file located in the res/layout folder. An example is main.xml located in res/layout folder.  During runtime, the .xml file where you defined your UI is loaded using the onCreate() event handler of your activity class and using setContentView() method of the extended Activity class. Moreover, during compilation time, each of the element in the defined UI xml file are compiled into an equivalent Android GUI class wherein its attributes are represented by methods.

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by paul

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Learning Android By Definition

Android is an open source platform for mobile devices. It is not a hardware. Its basically a software. In fact, It is a software stack as defined by Google. Encase your not familiar with the term, software stack is compose of an Operating System(OS), middle-ware & the key applications.
  • OS is by simply defined as platform between you and the hardware and where all applications run.
  • Middle-ware is/are the components and available package that allows applications to communicate to a network and to one another.
  • Key Applications is/are the actual programs or software that the phones will run
It was the product of the joint effort of Google and Open Handset Alliance(OHA). It was released November 5, 2007 which is shortly just after Apple's first generation iPhone release. Android is based on an opensource operating system called Linux.

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