The CAD Standard Graphics Exchange File Browsing System Based On Android Platform

With the Android devices more and more used in the office, study, entertainment, thispaper first introduces the current development trend of the Android platform, and alsoanalyzes the mostly using in the field of professional development, and at the other hand,combining the CAD graphics file (DXF and IGES)which as the standard of CAD graphicsinterchange format, we designed and developed the CAD standard graphics interchangefile browsing system based on Android platform, it is easy for people to use Androidmobile equipment to check the CAD drawings and information anytime and anywhere.This paper firstly set up the Android development environment, through installingthe JDK (Java Development Kit) to support Java Development environment, then chosingEclipse as an integrated Development environment, at the other hand, basing the Eclipseintegrated Development environment, installs the Android SDK and ADT (AndroidDevelopment Tools) plug-ins, and also configs the environment variable for AndroidDevelopment, and also using ADT tools to create the AVD (Android Virtual Device) andthe Android development environment of the Dalvik Virtual machine debuggingmonitoring service (Android DDMS) to debug program.Then through analyzing the information structure of the CAD standard graphicsinterchange file, we write the Java interface class to read primitive information, andsucceed to read the information of the CAD standard graphics interchange file. Then,through using the linear data structure of Java to access the reading primitive information.Because the Entities section is so important sections, so we spend most time to program thecode to read, and it is to ready for the graphics drawing parameters.Then we build the Android application framework, and also simply designed the UI ofthe program, and also divided the program in modules, in the program,using themulti-thread processing technology to read the CAD standard graphics interchange file,and draw graph at the same time, it completed to draw the standard graphics interchangefile’s point, line, circle, arc, polyline and other graphs, and also made the correspondingprocessing to the layer information and block information. Finally, with the aid of the Android virtual device,we debug the program, and deal theabnormal processing program, at last, the program are verified on the HTC G14phone andGoogle Nexus7, results show that the program can be run on Android devices, and cancomplete the specified function.