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How To Run Compatibility Test Suite (CTS) ?

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How does the CTS work? The CTS is an automated testing harness that includes two major software components: The CTS test harness runs on your desktop machine and manages test execution. Individual test cases are executed on attached mobile devices or on an emulator. The test cases are written in Java as JUnit tests and packaged as Android .apk files to run on the actual device target. Pre-Requirements : Linux System  Mobile or Emulator with User Build. Download   latest CTS. Download   CTS Media files. Download   Android SDK for Linux and keep it ready.  Setup the System for CTS: 1.Create 3 folders in your system root directory.  CTS CTS_Media ADT 2. Extract and  Copy   downloaded CTS files into the   CTS   folder which you have created now . It will have below folder structure             android-cts               ...
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Dalvik Virtual machine VS Java Virtual Machine:

Dalvik Virtual machine :          (DVM) is Register Architecture, designed to run on low memory, uses its own byte code and runs .Dex file (Dalvik Executable File) Java Virtual Machine :         (JVM) is Stack Architecture, uses java byte code and runs .class file having JIT. Java  source code is compiled by the Java compiler into .class files. Then the dx (dexer) tool, part of the Android SDK processes the .class files into a proprietary file format called DEX that contains Dalvik bytecode. Difference between .class and .dex file format           ● In DEX all the classes of the application are packed into one file.           ● All th e classes in the same DEX file share field, method, etc if they are same.           ● Classes from the same DEX file are l...
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NFC : Reading a MiFare Classic 1K from Android Devices

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Ever since Near Field Communication was embedded on mobile phones, loads of new ideas and business proposals made people very busy. So does the Android platform with its API's supporting NFC. Nexus S looks like a state of the art - good starting point if one wants to get past the monotonic Nokia's piece of the cake. I just want to share with you my experience on reading a MiFare Classic tag using the Nexus S..and the Android platform.  You need to have : A MiFare Classic 1k Tag - ( hopefully you know the keys for its Blocks :=) ) Android SDK and IDE Preferable a Nexus S (Make sure if the Android version is 2.3.3 and above). Some Basics about the card: MiFare classic cards store data in its Sectors. In MiFare classic 1k card there are 16 of them. Each Sector contains 4 blocks.  You can store 16 bytes in each block. Making about 1024 bytes of storage space..that explains the 1K part of the card. You can perform common tasks like reading, writing data on these blocks, authen...
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