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新建Android工程,将Unity中关于编译Android程序的Jar包导入我们的项目中,
project - Properties - Java Build Path - Add External JARs...
Jar包路径一般为:%Unity安装目录%\Editor\DataPlaybackEngines\androidplayer\development\bin\classes.jar
让MainActivity继承UnityPlayerNativeActivity
温馨提示:在Eclipes中自动import的快捷键为ctrl+shift+o
MainActivity最基本的只需保留onCreate函数,
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); }
接下来开始写接口,一般接口分为两种,静态和非静态,
静态函数调用
首先说一下静态函数接口的调用,假设我们的java类如下:
// MainActivity.javapackage com.Sealy.FingerTest;import java.io.ByteArrayOutputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import android.graphics.Bitmap;import android.graphics.Canvas;import android.os.Bundle;import android.view.View;import com.unity3d.player.UnityPlayer;import com.Sealy.FingerTest.UnityPlayerNativeActivity;public class MainActivity extends UnityPlayerNativeActivity{ public static int myAdd(int a,int b) { return a+b; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); }}
然后打包成jar包,放到Unity工程中的Assets\Plugins\Android\libs目录下,注意,如果只需打包java代码,则只需点击src打包
在Unity中,构造一个AndroidJavaClass对象,然后通过CallStatic接口进行调用
private AndroidJavaClass jc;jc = new AndroidJavaClass("com.Sealy.FingerTest.MainActivity");int sum = jc.CallStatic ("myAdd",1,3);
这是最简单的调用类的静态方法,当然我们可以写成非静态方法,将java类写成单例,供外部调用
非静态函数调用
// MainActivity.javapackage com.Sealy.FingerTest;import java.io.ByteArrayOutputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import android.graphics.Bitmap;import android.graphics.Canvas;import android.os.Bundle;import android.view.View;import com.unity3d.player.UnityPlayer;import com.Sealy.FingerTest.UnityPlayerNativeActivity;public class MainActivity extends UnityPlayerNativeActivity{ public static MainActivity currentActivity; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); jarTestFunc("call onCreate"); currentActivity=this; } public static MainActivity getInstance() { return currentActivity; } public int myAdd(int a,int b) { return a+b; }}
因为用了单例,单例的实例化在onCreate中,所以必须让类调用onCreate,所以需要在AndroidManifest.xml中配置相应的activity,
例子:
然后把AndroidManifest.xml放到Unity的Assets\Plugins\Android目录下
Unity调用如下:
private AndroidJavaClass jc;jc = new AndroidJavaClass("com.Sealy.FingerTest.MainActivity");AndroidJavaObject ao = jc.CallStatic("getInstance");int sum = ao .Call ("myAdd",1,3);
如果不是立即返回的,则可以用UnityPlayer.UnitySendMessage将结果返回给Unity
UnityPlayer.UnitySendMessage("GameObjectName", "CallBackFuncName", "param");
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