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Author Archives: Nikos Maravitsas

Nikos has graduated from the Department of Informatics and Telecommunications of The National and Kapodistrian University of Athens. During his studies he discovered his interests about software development and he has successfully completed numerous assignments in a variety of fields. Currently, his main interests are system’s security, parallel systems, artificial intelligence, operating systems, system programming, telecommunications, web applications, human – machine interaction and mobile development.

Android Contacts Example

In this example we are going to see how to get Contact Information on your own Android Application. This is an example that demonstrates the appropriate queries (basically there are translated to SQLite queries) you should use in order to get the information you want about Contacts. Of course you can customize the display of the Contact List (here we ...

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Build Android application package file (APK) using Eclipse IDE

Android application package file (APK) compressed file that is used to install and distribute Android Applications. Remember when you install an new Application in your Android Phone (or when you run your Application in an emulator) the APK file of your project is installed on your device. APK files are really ZIP archive files. You may open APK files using ...

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Android ActionBar Example

In this tutorial we are going to see how to  create a simple Android Menu using ActionBar. It is a very handy kit when you want to create simple Menus for your application. In this tutorial we are going to see how to create a simple menu with 3 options and with Icons.               ...

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Android Intent Example

In this example we are going to see how to use the Android Intent component. You can think of Intents as messages that the Android Platform sends when it wants to request the service of another resource, like launching another Activity or another Service. You can send an Intent to the Android System using certain calls, like startActivity or startService. ...

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Android ProgressDialog Example

Progress dialogs are very commonly used components in all User Interfaces, when you want to display the progress of a task that is taking up a lot of time, for example a file or an Image download. In this tutorial will create a ProgressDialog to let the user know the progress and a status of a simulated Image download activity. ...

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Android Socket Example

In this tutorial we are going to see how to use Sockets in Android Applications. In Android, sockets work exactly as they do in Java SE. In this example we are going to see how to run an Server and a Client android Application in two different emulators. This requires some special configuration regarding port forwarding, but we are going ...

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Android SQLite Example

In this example we are going to see how yo interact with an SQLite database with your Android Application. SQLite  is an Open Source Database for structued data in relational databases. It is embeded in Android, to you don’t have to do anything special to set up or administer an SQLite server (e.g like in a Linux box). Android offers a ...

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Android ExpandableListview Example

With this tutorial we are going to see how to use Android ExpandableListView. As you might have imagined, ExpandableListView is quite like a ListView but it has 2 levels, one can say. It’s sort of like a menu with sub menus. This is from the official documentation: “A view that shows items in a vertically scrolling two-level list. This differs from the ListView by allowing ...

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Android SharedPreferences Example

In this example we are going to see how to use Android SharedPreferences. You can permanently store preferences using SharedPreferences with the form of a pair : key and a value. Basically there are some ways you can store data in Android : Shared Preferences: Prrimitive data storage (boolean Strings, ints etc..). Internal Storage: Device memory storage. External Storage: Store public data on storage ...

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Android Thread Example

In this example we are going to see how to use Android Thread. As we  read from the official documentation: A Thread is a concurrent unit of execution. It has its own call stack for methods being invoked, their arguments and local variables. Each virtual machine instance has at least one main Thread running when it is started; typically, there are several others for housekeeping. ...

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