Ugo Chirico's Blog

While I was developing an Android app for a customer of mine, I asked to myself:- "which are the system properties available on Android Platform?".I cannot find any exaustive page on internet speaking about that, so I wrote this post to share what I discover.I wrote a simple app that prints in the log the system properties. This is what I found: android.vm.dexfile:true java.runtime.name:Android Runtime java.runtime.version:0.9 java.vendor:The Android Project java.vendor.url:http://www.android.com/ java.vm.version:1.0.1 java.vm.vendor:The Android Project java.vm.name:Dalvik java.vm.vendor.url:http://www.android.com/ java.vm.specification.name:Dalvik Virtual Machine Specification ja... [More]

Last month I ported a couple of my J2ME/LWUIT apps on Android. I used the LWUIT port from Thorsten [1]. I downloaded the source code from LWUIT incubator SVN [2], but I spent a lot of time in merging the LWUIT original classes with the Thorsten's classes needed to port to Andoid and then I spent a lot of time again to produce a .jar usable with Android SDK. In this post I want to share the Eclipse project that I created to compile and jar the Thorsten's LWUIT Android port and I want to show how to write a simple HelloWorld LWUIT-Android project. Requirements: 1) Eclipse Helios or later2) Android SDK3) LWUITPortAndroid eclipse projectnz You can download LWUITPortAndroid from here:LWUITPor... [More]

Working on a recent project involving the visualization of images from a server on mobile devices' (small) screens, I got in touch with a serious problem: LWUIT has a fast, but very poor scaling algorithm. The quality of the images scaled to be smaller is very poor, as much as texts and numbers cannot be read on the screen. Because I had to solve the problem I looked for a solution and I found the library J2ME Army Knife (http://www.j2mearmyknife.com/) that suppiles several utility classes to manage images.The really interesting classes that helped me to solve my problem was: ImageTransformationResize and ImageTransformationSmooth The following function resize an image to a given width ... [More]