TouchVG Demo for Android

This is a unit test and example project for vgandroid, which is a lightweight 2D vector drawing framework for Android.

How to Compile

• Don't want to build libtouchvg.so and libdemocmds.so ?

  • Download the prebuilt libraries.
  • Extract touchvg_libs in the zip package to vgandroid/TouchVG/libs.
  • Extract democmds_libs in the zip package to DemoCmds/android/DemoCmds/libs.
  • Import all projects (touchvg, democmds, vgdemo1 and VGTest) in eclipse. Android SDK version in the projects may need to modify according to your installation.

• Enter the directory of this project, then type ./build.sh to clone and build libraries needed.

  • Need to add the NDK installation location to PATH.

  • If the error build/gmsl/__gmsl:512: *** non-numeric second argument to wordlist function occurs, then open the build/gmsl/__gmsl file in the NDK installation directory, and change line 512 to: int_encode = $(__gmsl_tr1)$(wordlist 1,$(words $1),$(__gmsl_input_int))

  • MSYS is recommended on Windows to run UNIX commands such as rm, sh and make. MinGW and Cygwin are not necessary for TouchVG.

• Import all projects (touchvg, democmds, vgdemo1 and VGTest) in eclipse, then run VGTest or vgdemo1 project to view the demonstration.

  • Android SDK version of the projects may need to modify according to your installation.

  • Recommend using the newer ADT Bundle to avoid complex configuration.

• Regenerate libtouchvg.so and JNI classes:

  • Type ./build.sh -B to rebuild the native libraries.

  • Type ./build.sh APP_ABI=x86 to build for the x86 (Intel Atom) Emulator.

  • Type ./build.sh -swig to regenerate the kernel JNI classes.

  • Need to install the lastest version of SWIG 3.0, and add the location to PATH on Windows. SWIG 2.x may can't parse UTF-8 header files on Windows.

How to Debug native code

• Add #include "mglog.h" and use LOGD("your message %d", someint) in the C++ files needed to debug.

• Set LogCat filter in Eclipse: tag:dalvikvm|AndroidRuntime|vgjni|touchvg|vgstack|libc|DEBUG.

• Print JNI functions to locate problems of libc crash:

  1. Add python addlog.py in TouchVG/jni/build.sh.
  2. Type ./build.sh -swig to add log in all JNI entry functions, or remove touchvg_java_wrap.cpp and type ./build.sh.

Add more shapes and commands

• Do not want to write C++ code? Please reference to test/src/vgtest/testview/shape package to write your own shape and command classes.

• You can create library project containing your own shapes and commands. So the TouchVG and TouchVGCore libraries does not require changes.

  • Checkout and enter DemoCmds directory, then type python newproj.py YourCmds:

    git clone https://github.com/rhcad/DemoCmds.git
    cd DemoCmds
    python newproj.py MyCmds

• You can customize the drawing behavior via implement your CmdObserver class (see the example in DemoCmds ).

License

This is an open source BSD licensed project. It uses the following open source projects:

• vgandroid (BSD): Vector drawing framework for Android.
• vgcore (BSD): Cross-platform vector drawing libraries using C++.
• DemoCmds: A template and example project containing customized shape and command classes.

How to Contribute

Contributors and sponsors are welcome. You may translate, commit issues or pull requests on this Github site. To contribute, please follow the branching model outlined here: A successful Git branching model.