如何将“ .jar”库文件导入Unity？

Question

How can I import to .jar file into Unity3D? I am using Windows platform, not Android, iOS, Mac etc. I put my .jar file into to the Assets/Plugins/x86. I don't understand how to call my function in .jar library.

I haven't found anything here for windows: http://docs.unity3d.com/Manual/Plugins.html

Thanks.

Answer 1

In Unity on Windows platform you do not have a built in support for this as far as I know, but it is easy to convert Java bytecode to .NET using ikvm . It comes with a converter named ikvmc, so you can simply use:

ikvmc your.jar -target:library ==> add -target:library to generate dll

It will convert your jar to your.dll which is your Java code rewritten in .NET dll. Then you simply use it by putting it in your assets folder and use it as if it was native .NET library. For example, if your java code was:

public class HelloWorld {
    public static void hello() {
        System.out.println("Hello, World");
    }
}

You use it simply by HelloWorld.hello()

Answer 2

If you want to directly add jar files in unity

Example class file below, compile into jar

package xxx;
    import android.util.Log;
    public class Helper {
    public static void testAndroid()
        {
        Log.i(“Unity”, “test android”);
        }
    }

Place the jar file in plugins->Android in unity and check android platform in plugin editor. Note it will only run on android device or simulator if you are using android references

Create a new MonoBehaviour script TestAndroidPlugin.cs, and attach it to the camera:

public class TestAndroidPlugin : MonoBehaviour {    
    void Start () {
        Debug.Log("Android function is to be called");


        var ajc = new AndroidJavaClass("xxx.Helper"); //(1)
        ajc.CallStatic("testAndroid");                                       //(2)
        Debug.Log("Androidtion is called");  
    }
}

Answer 3

As I have know unity does not support jar library for windows development because the supported programming language are

UnityScript(javascript for unity), boo and C#.

You can check the documentation here unity supported programming language Even they drop support for booking in unity 5.0 but you can use it. Instead of a jar library why not look for ac# library that solve the same problem you want to solve.