How to install Windows 10 earlier

If you reserve the free upgrade of Windows 10 and the upgrade is still not available for your computer in Windows Update in Control Panel, you can try the following:
– in Command Prompt (Admin) write the following command: wuauclt /updatenow and press Enter
– go to Windows Update screen in Control Panel where Windows 10 update should be available, starting download
If you receive the Windows Update error 0×80240020, go to C:\Windows\SoftwareDistribution\Download and delete all files. After this, reboot the computer and the process will restart and should be working, with Windows 10 available.
Windows 10 Update

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Windows 8.1 Update 1 available

Windows 8.1 Update 1 is available. It can be downloaded through Windows Update or directly for x64 or x86.

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How to connect to a .NET Web Service from a J2ME MIDlet using kSOAP 2

Web services had and continue to have a great impact on the development of Web applications because they allow total independence between clients and service providers. The location, the platform, the programming language and the architecture of both the clients and the services has no effect on each other. The Internet technologies and standards that allowed the implementation of Web services are HyperText Transfer Protocol (HTTP), eXtensible Markup Language (XML), Remote Procedure Call (RPC), Web Services Description Language (WSDL), Simple Object Access Protocol (SOAP) and Universal Description, Discovery, & Integration (UDDI).

In this article we will see how to connect to a .NET Web Service from a j2ME MIDlet using kSOAP2 library. The Java 2 Micro Edition (J2ME) Platform offers support for Web Services through the J2ME Web Services API (WSA), JSR 172, which provides two optional APIs: remote service invocation (JAX-RPC) and XML parsing (JAXP). For the next example, we will use the third party kSOAP 2 library because it is lightweight and efficient. The solution is developed in the NetBeans IDE but you could use also Eclipse IDE.

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Android Tutorial (8) – How to add a menu, programmatic vs. declarative solution

How to add an Android menuAndroid mobile applications have the advantage of being deployed on mobile devices that have touch displays. This enhance the user experience and allows developers to design the user interface so it will be dynamic, easy to use and efficient. Despite this advantage, the display size and usability concepts (one golden rule is to have all the window controls visible on the display) limit the number of buttons and visual controls that can be placed on a single window/form. So, application wide options and functions can be made available using a menu, leaving the display for particular and contextual options.

A menu is a group of options (items) that are accessed using the device Menu key. The menu items are represented by single options or by groups of options, which are organized in submenus.

In this article, we will see how to add a menu to the Android application. The solution is implemented using both the programmatic and the declarative solution that uses menu.xml files. For the declarative solution we will use also the Android visual editor for menus.

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Android Tutorial (7) – How to debug the Android mobile application with LogCat

In computer science and especially in programming, things can go wrong easily. Even simple things, that you have done it before, can generate runtime exceptions that crash the application. Most of the time, the reason is the inability to think to all aspects every time you do something. And because this will not happen, the programmer best friend is the debugger.

In this article we will see how to debug the Android mobile application using the Android LogCat. Despite this Android SDK tool, the application can be debugged in Eclipse like any other Java application (i.e using breakpoints).

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Android Tutorial (6) – How to create and display a new form, window or activity

In this post we will see what are the basics for developing an Android mobile application that has multiple windows or activities. To do that, we need to know how to create and display a new form, window or activity (for the rest of the post we will use the Android vocabulary and call it just activity).

We have seen in the previous parts of the Android Tutorial which are the fundamentals of an Android application and its components. Also we have seen that behind a window there is an Activity type instance that has a lifecycle and a display.

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Android Tutorial (5) – How to create a new Activity class with the Manifest editor or without it

Behind any window or form in the Android mobile application there is an Activity instance. In order to develop a mobile application with multiple windows you must create, for each display, a new class that extends Activity class.

In this post we will see how to create a new Activity programmatically or using the Manifest WYSIWYG graphical editor that comes with the Android ADT Plugin for Eclipse.

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How to insert a logo or image into a QR code using Photoshop

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This article describes different methods of changing a QR code in Photoshop that allow to insert a logo, image or text. The custom or branded QR code will be read correctly despite the modification.

The QR (Quick Response code, Denso Barcode, ISO/IEC18004) code represents a two-dimensional code bar, initially used by industry, but widely used today to encode and transmit short information, like URLs, phone numbers, contact information, business cards, meetings, GPS locations, email. The transmission is done visually and the receiver is a mobile device that has a camera and a code reader software.

QR codes were created in 1994 by a subsidiary of Toyota, Denso Wave , to be used by the carmaker in the management of various auto parts. QR Codes were use din the production for fast visual identification of components and for storing additional information.

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Android Tutorial (4) – Procedural vs. Declarative Design of User Interfaces

Android mobile applications are relying on user interfaces composed on dialog windows, visual controls, 2D graphics and other multimedia elements for efficiency and usability. The Android platforms allows programmers to use two methods to design user interfaces: procedural or declarative.

In this post we develop a simple Android mobile applications that will help to make an analysis on procedural vs. declarative design of user interfaces.

Procedural means to use only Java code to design the user interface. This is something usual in designing Swing interfaces on JSE platform or designing user interfaces in J2ME MIDlets. Because every element of the user interface is managed by different classes instance, designing means to create them and to manage them.

Declarative means to use a descriptive markup language, as XHTML or XML, to describe the user interface. This is similar to how simple HTML pages are done. The designer describes the page look and the browser interprets and generates the user interface.

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Android Tutorial – Overview and contents

android tutorialThe Android tutorial covers all important concepts that will allow a new programmer to learn how to develop mobile applications for the Android platform. The tutorial is written  from a programmer perspective and dives after few topics into simple and do-by-example applications which are easy to follow. Despite the apparently simplicity, each topic highlights important aspect of the Android platform and synthetize aspects described in detail on the developer.android.com portal.

Topics posted until now:

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