Ceres-solver Android NDK Example

An example for compiling ceres-solver helloworld.cc with Android NDK including OpenCV(2.4.9) Clone Ceres-solver first.

git clone https://ceres-solver.googlesource.com/ceres-solver
cd ceres-solver/jni

Use NDK 9+ to compile ceres-solver. If you are trying to use OpenCV-2.4.9 in your Android project then make following changes before compiling ceres-solver.

1. In jni/Application.mk

   APP_BUILD_SCRIPT := $(call my-dir)/Android.mk

   APP_PROJECT_PATH := $(call my-dir)

   APP_CPPFLAGS += -fno-exceptions

   APP_CPPFLAGS += -fno-rtti

   APP_CPPFLAGS += -std=c++11

   APP_OPTIM := release

   APP_STL := gnustl_static

   APP_ABI := armeabi-v7a armeabi

Now compile ceres-solver using ndk-build. Once done, you will find objs created in ../obj/local/armeabi/libceres.a

Now go to your Android project and paste these Android.mk & Application.mk files inside the jni folder.

Update the paths of libceres.a & libopencv_java.so inside Android.mk.