Tutorial

Sometimes QR codes are a nice way to distribute information like calendar events, contact information, e-mail, geo-locations or internet addresses. In the following article we’re going to encode information to QR code images using the ZXing library and afterwards decode information from a given QR code. Finally we’re taking a look on online QR code generators and how to integrate the ZXing library in a Maven project. The ZXing Library Download the ZXing Libraries from http://code.google.com/p/zxing/downloads/list – the file name is ZXing-<version>.zip Unpack the downloaded archive somewhere Change to the extracted directory and run ant. If you don’t have JavaME installed – and you don’t have to for the samples below – run ant buildwithoutj2me – that will do the job Having compiled the libraries you’re now free to include the core.jar from zxing-<version>/core/ and the javase.jar from zxing-<version>/javase as dependency in your project ...

In this tutorial we are going to build a simple todo app that is able to store simple todos in a database. The user is able to add new todos or delete old ones by clicking on a todo. For this tutorial we won’t use maven to keep it simple – if maven integration is desired – take a look at this tutorial. Steps Create a new android project using the Android SDK and your IDE Create some packages com.hascode.android.activity and com.hascode.android.persistence Create the layout in res/layout/main.xml – the main elements: a listview for the todos-list, a textbox and a button to enter new data. <?xml version="1.0" encoding="utf-8"?> <RelativeLayout android:id="@+id/widget31" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android" > <TableRow android:id="@+id/row" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_below="@+id/tasklist" android:layout_alignParentLeft="true" > <EditText android:id="@+id/etNewTask" android:layout_width="200px" android:layout_height="wrap_content" android:text="" android:textSize="18sp" > </EditText> <Button android:id="@+id/btNewTask" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@+string/add_button_name" > </Button> </TableRow> <ListView android:id="@+id/tasklist" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" > </ListView> </RelativeLayout> ...

Having written the article “How to build a Confluence SOAP client in 5 minutes” some readers asked me for some more information and help using the JAX-WS plugin that I mentioned in the article instead of the Axis plugin – so here we go ;) Steps Create a simple maven project first using archetype:create or archetype:generate mvn archetype:create -DgroupId=com.hascode.jaxws -DartifactId=soap-tutorial We get a pom.xml like this: <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.hascode.jaxws</groupId> <artifactId>soap-tutorial</artifactId> <version>0.1</version> </project> ...

This short tutorial shows how to set-up a developer instance of the popular Confluence Wiki from Atlassian in a few minutes. It’s a prerequisite for a few following tutorials regarding the Confluence API and plug-in development for this system. We want a quick install so we are going to run Confluence with the embedded servlet container and HSQL database. update Meanwhile it is way much easier to use Atlassian’s Plugin SDK using atlas-mvn run or atlas-mvn-run-standalone –product confluence –version x.x.x but if you need to setup an independant instance, this article still might be useful. ...

Helo – today I wanted to post a small tutorial for a small index and search operation using the Lucene indexer and Maven for the project setup. Setup Create an empty Maven sample project using the Eclipse Maven Plugin or use the following console command: mvn archetype:create -DgroupId=com.hascode.demo.search -DartifactId=lucene-sample Here is my pom.xml there are some dependencies for Lucene defined: <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.hascode.demo.search</groupId> <artifactId>lucene-sample</artifactId> <version>0.0.1-SNAPSHOT</version> <name>My Lucene Search Sample</name> <description>Lucene Search Sample</description> <dependencies> <dependency> <groupId>org.apache.lucene</groupId> <artifactId>lucene-core</artifactId> <version>2.4.1</version> </dependency> <dependency> <groupId>lucene</groupId> <artifactId>lucene</artifactId> <version>1.4.3</version> </dependency> </dependencies> </project> ...