AndroidLibSvm

use the latest libsvm 3.2 in Android via Java-Native-Interface (JNI)

Features

• minimal changes on the original c library (https://www.csie.ntu.edu.tw/~cjlin/libsvm/)
• use the latest libsvm 3.2
• compatible to Android Studio

Usage

Once you import the whole project to your Android Studio and run it on your device. The svm model and prediction output file will be located at /sdcard/libsvm of your device. You can also check the livsvm output at your logcat output.

In java, you can call the original "./svm-train options" function as:

	jniSvmTrain(String options);

In a similar way, the the origianl "./svm-predict options" function is equivalent to:

	jniSvmPredict(String options);

An example usage in Java could be:

	jniSvmTrain("-t 2 your_train_data_path your_model_file_path");
	jniSvmPredict("your_predict_data_path your_model_file_path your_output_file_path");

By reading and analyze the output file, most applications can easily enjoy the powerful libsvm functionaility with this project.

Include this project to existing Android project

To use this project in your existing Android project, you need to do the following actions:

• copy the whole AndroidLibSvm/app/src/main/jni/ to your project (with the same relative path)
• edit AndroidLibSvm/app/src/main/jni/jnilibsvm.cpp to replace any occurance of "edu_umich_eecs_androidlibsvm_MainActivity" to your package and activity name. For example, if your package name is com.happy.project and your activity name is HappyActivity, you should change the prefix to com_happy_project_HappyActivity (see this link to know the name convention in JNI: http://journals.ecs.soton.ac.uk/java/tutorial/native1.1/implementing/declare.html).
• copy the AndroidLibSvm/app/build.gradle to your project and ensure ndk-build is installed (see this link for further reference about compiling ndk functions in Android: http://www.shaneenishry.com/blog/2014/08/17/ndk-with-android-studio/).