Android App Development: Android Services

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On June 29, 2011

Android Service is used for long-running processes that do not require user interaction, such as calling a web service and parsing response. Or processes that need to be running even if the application that started the service is not on the foreground such as playing mp3 files in a music player. we need to distinguish […]

Android App Development: Parsing Web Service Response part 1

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On June 15, 2011

In a previous last post we saw how to call REST and SOAP web services. The web service reponse can be one of the following: XML. SOAP. JSON. Parsing XML Android offers three types of XML parsers: DOM Parser. Pull Parser. SAX Parser. we’ll demonstrate each using the following xml example: <?xml version=”1.0″?> <person> <firstname>Jack</firstname> […]

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Android App Development: Calling Web Services

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On May 25, 2011

One of the most common functionalities required in mobile applications is to call a web service to retrieve data. This process involves requesting the web service with parameters, receiving the response and parsing it to obtain data. Today the most common web services types are SOAP and REST. Android does not provide a built in SOAP client, […]

Android App Development:Using Preferences

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On May 19, 2011

We saw before that we can persist an application’s data using SQLite database. Android offers another way to store user’s data through using preferences. Android preferences is a key/value entries that store data that can be specific to a certain activity or shared among all activities within the application. the data are stored in a […]

Android App Development:Threading part 2: Async Tasks

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On May 11, 2011

In the previous post we saw one way to deal with threads in Android, which is by using Handlers. In this post we’ll see how to use another technique which is using AsyncTask class. AsyncTask is an abstract class that provides several methods managing the interaction between the UI thread and the background thread. it’s […]

Android or WP7 simulation on your iPhone

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On May 9, 2011

Let‚Äôs say that you are very happy with your iPhone but you wonder in the¬† same time how¬† it feels like to use Windows Phone 7 or¬† Android . From today you will be able to use those¬† two operating systems with¬† your iPhone. If you have already jailbroken your iPhone¬† then¬† you can download […]

Android App Development:Threading part 1: Handlers

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On May 4, 2011

Multi-Threading concept is essential in most platforms. it provides maximum utilization of the processor. threading is used when the program executes time consuming processes (such as calling a web service) and to give a good user experience by unblocking the UI. Android provides threading techniques to perform time consuming tasks in a background thread with coordination with the […]

Android App Development:Building Android Content Providers

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On April 27, 2011

In this tutorial I will cover building Android content providers. Content providers are the way that Android applications can share info between each other. an application can ask for info from another application using content providers. In this post we’re going to create a content provider to access data from our previous Employees simple application […]

Android App Development: Android Content Providers

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On April 20, 2011

In the last post we created a sqlite database android application. We saw that the database file is stored in the file system directories of that application meaning that the database cannot be accessed from another application. You can apply the same thing on any resources within your application (Files, images, videos, …). But there […]

Android App Development: Using SQLite database

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On April 14, 2011

Android default Database engine is Lite. SQLite is a lightweight transactional database engine that occupies small amout of disk storage and memory, so its a perfect choice for creating databases on many mobile operating systems such as Android, iOS. Things to consider when dealing with SQLite: Data type integrity is not maintained in SQLite, you […]