我们需要回应中文。需要为Unity与安卓交互课程写导读。必须遵守要求。资料包线索：课程目录有三个: 环境配置、Unity调用安卓层的接口、安卓层调用Unity的接口。题目完整"Unity与安卓的交互"，分类体系课。需要写具体，700-1200汉字，2-3小标题。避免套话。需要从能力缺口、配套练习、看完应能回答的问题切入。不要复述完整文件目录、不要列zip/mp4文件名，不要原样重复完整课程标题。必须写到：解决什么问题、适合什么基础、建议先看哪几块、学完能独立做什么、资料怎么配合练习。禁止编造目录里没有的模块。不能出现其他站点名。不要自称AI。输出HTML片段。需要仔细。
Let's plan content. Title should maybe "Unity与安卓交互导读" but avoid exact full course title? "Unity与安卓的交互" is title. We can rephrase: "这篇导读对应 Unity 与安卓互通方向的体系课" maybe okay. Need specific.
Need write about problem: Unity开发者要调用Android原生功能（Toast、Activity、SDK、支付、定位、相机、分享等）；Android工程师要嵌入Unity或从Android主动发消息给Unity。课程解决双向调用：Unity调用安卓层接口，安卓层调用Unity接口，以及环境配置。适合基础：熟悉Unity基本操作和C#，会Android Studio基本项目结构/Java或Kotlin语法；不熟悉Android则先补环境和JNI/ADB basics. Need not pretend all.
建议先看哪几块：环境配置（JDK、Android SDK、Unity Android Build Support、Gradle版本、Android Studio、真机调试），然后Unity调用安卓层接口（了解AndroidJavaClass/AndroidJavaObject、JNI、调用静态/实例方法），然后安卓层调用Unity接口（UnityPlayer.UnitySendMessage、在Android Studio中集成Unity library或Unity AR/VR? But avoid inventing modules? The course目录 only has those sections. We can say根据目录，课程顺序就是环境配置、Unity→安卓、安卓→Unity。不要编造具体模块名 beyond. We can mention likely practice: 从简单Toast开始，到传参和返回值。 Need be cautious not to claim modules not in directory. We know from names: "02.unity调用安卓层的接口", "03.安卓层调用unity的接口". Environment config. So can mention those.
学完能独立做什么：能搭好工程环境，在Unity C#中构造AndroidJavaObject调用Java方法，把设备IMEI/电量/相册等结果取回Unity；能从小游戏/工具App里唤起安卓分享面板或调起另一个Activity；能在Android工程内接收Unity事件，回调Unity场景中的GameObject方法。Need not overstate.
资料怎么配合练习：观看时手写代码，先搭环境; 每节视频后做最小实现: Unity按钮->调Java->Java后处理->返回Unity显示。建议准备真机 vs 模拟器。如果卡住，优先检查Unity和AS版本、JDK、Gradle、包名和导出模式。 Also "笔记导向" maybe.
Need 2-3 subtitles. Let's write HTML with and
. Need count Chinese chars 700-1200. We need ensure not over 1200. Let's draft.
Potential structure:
这门课解决什么缺口
...
你该带着什么基础来学
...
学完能做什么，资料怎么练
...
Need "建议先看哪几块" includes "环境配置" and the two interface directions. Maybe in second section.
Need write with "缺什么补什么" style. No "课程推荐". We can say "这门课" etc. Need not "从入门到进阶".
Let's draft carefully.
First paragraph: Many Unity projects don't live in pure Unity world; need Android native capabilities. The common bug: C# 调不到 Java 方法，或者 Java 调不到 Unity 场景. This course is about bidirectional bridge. The three video segments: environment config, Unity calls Android layer, Android calls Unity. It's a short cross-language/cross-platform integration.
Need specify what problem solved: 解决在Unity中写Android原生代码时常见的环境踩坑和两端互相调用的调用语法。 不是教Android开发或Unity基础.
Suitable foundation: 能自己搭一个Unity场景、写C#脚本；对Android Studio不熟练也能跟，但至少要懂Java/Kotlin的类、方法、包名、Activity概念。完全没碰过Android建议先补: 命令行JDK、Gradle、Android SDK 等. If only Unity, the environment config section will be important.
Maybe include "c#-Java的桥梁不是魔法" - AndroidJavaClass, AndroidJavaObject? But avoid over-specific? We can mention these as concepts likely. Since course title "Unity调用安卓层的接口" obviously involves. It's okay.
Need "看完应能回答的问题" perhaps: 如何配置可联调的 Unity + Android 环境？Unity 进程怎么拿到 Java 静态实例？UnitySendMessage 的三个参数是什么？等等. We can phrase.
Need "不要复述完整文件目录" So we cannot list "1-1 1-2 1-3". We can mention the three content blocks without filenames. That's okay.
Need "建议先看哪几块" explicit: 建议先看环境配置，再看 Unity 调安卓，最后安卓调 Unity。 If the
课程目录
1-1 [Unity-与安卓的交互] 02.unity调用安卓层的接口 (14:51).mp4
1-2 [Unity-与安卓的交互] 环境配置 (10:38).mp4
1-3 [Unity-与安卓的交互] 03.安卓层调用unity的接口 (16:45).mp4
