VirtualSketch/vs-mobile-app

virtual_sketch_app

A new Flutter project.

Getting Started

This project is a starting point for a Flutter application.

A few resources to get you started if this is your first Flutter project:

• Lab: Write your first Flutter app
• Cookbook: Useful Flutter samples

For help getting started with Flutter, view our online documentation, which offers tutorials, samples, guidance on mobile development, and a full API reference.

C++ requirements

To build this project, the official Android OpenCV SDK is required, and can be downloaded here:

• OpenCV official releases

Download the latest Android version and uncompress the files.

Then, create a symbolic link at /android/app/src/main/jniLibs that points to /path/to/OpenCV-android-sdk/sdk/native/libs, so it stays like this:

android
└── app
    └── src
        └── main
            └── jniLibs -> /path/to/OpenCV-android-sdk/sdk/native/libs

Finally, change the file android/app/build.gradle and find the -DANDROID_OPENCV_SOURCE_DIR argument and assign the value of /path/to/OpenCV-android-sdk/sdk/native/jni/include to it.

    defaultConfig {
        ...
        externalNativeBuild {
            cmake {
                  cppFlags '-frtti -fexceptions -std=c++11'
                  arguments "-DANDROID_STL=c++_shared",
                      "-DANDROID_OPENCV_SOURCE_DIR=/path/to/OpenCV-android-sdk/sdk/native/jni/include"
            }
        }
    }

This is so CMakeLists.txt can include the OpenCV libs for Android compilation.