Unity for Android 比较特殊，Unity for IOS 打包是将XCODE工程直接交给开发者，开发者可以在工程的基础上继续添加新的视图，最后由开发者自行打包生成IPA包，发布程序。而Unity for Android打包直接生成APK包，等于说源代码开发者是看不到的，但是Unity的自身确实有些局限，针对Android平台我们需要学习如何在Unity中调用Android的JAVA代码。本章我们的目标是使用Unity的脚本打开Activity。首先我们创建一个普通的Android工程，目录结构如下图所示。

         因为项目需要使用Unity提供的接口，所以需要将接口classes.jar引入至当前工程但中。接口包的所在地，打开Finder->应用程序->Unity->点击Unity图标，鼠标右键选择“显示包内容”->Contents->PlaybackEngines->AndroidPlayer->bin->classes.jar 。接口包引入工程后，开始编写JAVA代码。

UnityTestActivity.java

 
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package com.xys;      import android.content.Context;   import android.content.Intent;   import android.os.Bundle;      import com.unity3d.player.UnityPlayerActivity;      public class UnityTestActivity extends UnityPlayerActivity {       /** Called when the activity is first created. */          Context mContext = null;       @Override       public void onCreate(Bundle savedInstanceState) {           super.onCreate(savedInstanceState);  

针对Android平台我们需要学习如何在Unity中调用Android的JAVA代码。