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href="/apple-touch-icon.png" rel="apple-touch-icon" type="image/png" /><link href="/feed" rel="alternate" title="RSS2.0" type="application/rss+xml" /><title>UnityでAndroid JARファイルを呼び出す最も簡単な方法 | Basicinc Enjoy Hacking!</title><meta name="csrf-param" content="authenticity_token" /> <meta name="csrf-token" content="1Fzla5FUmOAprHbl17Q1hOqmEWkBg4vSej1D3FWeo4e0K20t5NHSfq0pX6uW2PiADIeAMq93p+i68e9a/+3C6A==" /><meta content="width=device-width,initial-scale=1" name="viewport" /><meta content=" UnityでAndroid JARファイルを呼び出す最も簡単な方法 | Basicinc Enjoy Hacking!" property="og:title" /><meta content="article" property="og:type" /><meta content="2013-04-14T09:00:00+09:00" property="article:published_time" /><meta content="zaru" property="article:author" /><meta content="Technology" property="article:section" /><meta content="https://tech.basicinc.jp/articles/25" property="og:url" /><meta content="https://tech.basicinc.jp/uploads/64195e9f4fec838ce761aac75e71f372.png" property="og:image" /><meta content="image/png" property="og:image:type" /><meta content="1200" property="og:image:width" /><meta content="630" property="og:image:height" /><meta content="最近、Unityなゲームアプリ増えてますね。この手のワンソースマルチプラットフォーム対応ゲームエンジンは、広告などネイティブで実装しなくちゃならない部分が面倒だったりします。というわけで、UnityからJavaのJARファイルを呼び出す最も簡単な方法を紹介します。 JARフ..." property="og:description" /><meta content="ja_JP" property="og:locale" /><meta content="summary_large_image" name="twitter:card" /><meta content="@zaru" name="twitter:creator" /></head><body><header data-scope-path="layouts/_header"><div class="header-contents"><a class="root-link" href="/"><svg class="site-logo"><use xlink:href="/assets/icons-5bbe775037b55281ef0bc50d30a51f69c7c3914d399c7107e37f0702d98ae8a2.svg#logo"></use></svg><div class="site-title">Enjoy Hacking!</div></a><div class="site-desc">Basicinc エンジニアブログ</div></div></header><nav data-scope-path="layouts/_breadcrumbs"><ul class="breadcrumbs" itemscope="itemscope" itemtype="https://schema.org/BreadcrumbList"><span class="pretext">% cat </span> <li itemprop="itemListElement" itemscope="itemscope" itemtype="https://schema.org/ListItem"><a itemprop="item" href="/"><span itemprop="name">~</span></a><meta itemprop="position" content="1" /></li>/<li class="current" itemprop="itemListElement" itemscope="itemscope" itemtype="https://schema.org/ListItem"><span itemprop="name">UnityでAndroidJARファイルを呼び出す最も簡単な方法.md</span><meta itemprop="item" content="https://tech.basicinc.jp/articles/25" /><meta itemprop="position" content="2" /></li></ul></nav><div data-scope-path="articles/show"><article class="article"><h1 class="article-title"> UnityでAndroid JARファイルを呼び出す最も簡単な方法</h1><div class="article-desc"><a class="article-author" href="/authors/1"><img class="article-author-avatar" src="https://tech.basicinc.jp/uploads/e868e5fb1e34b970ae7d8e04c454ff28.png" /><span class="article-author-name">zaru</span></a><div class="article-date-info"><time class="article-posted-date">Posted 2013-04-14</time></div></div><div class="article-body"><div data-scope-path="partials/_viewer"><p>最近、Unityなゲームアプリ増えてますね。この手のワンソースマルチプラットフォーム対応ゲームエンジンは、広告などネイティブで実装しなくちゃならない部分が面倒だったりします。というわけで、UnityからJavaのJARファイルを呼び出す最も簡単な方法を紹介します。</p> <h2>JARファイルの配置</h2> <p>/Assets/Plugins/Android ディレクトリに目的のJARファイルを配置します。その他リソースファイルが必要であればそれも同じように配置します（assetsなど）。</p> <p>アクティビティなどでAndroidManifest.xmlが必要な場合は、それも配置します。もし、他のプラグインでも使う場合は、必要な部分をマージして一つのマニフェストにまとめます。</p> <p>こんな感じです。</p> <p><img src="https://tech.basicinc.jp/uploads/a44d41514757dcdf18052a1001ef76bb.png" alt=""></p> <h2>JARを呼び出すC#スクリプトを作る</h2> <p>次に、JARのクラスを呼び出すためのC#スクリプトを書きます。</p> <pre lang="csharp" class="highlight-csharp"><span class="k">using</span> <span class="nn">UnityEngine</span><span class="p">;</span> <span class="k">using</span> <span class="nn">System.Collections</span><span class="p">;</span> <span class="k">public</span> <span class="k">class</span> <span class="nc">HogeObserver</span> <span class="p">:</span> <span class="n">MonoBehaviour</span> <span class="p">{</span> <span class="k">void</span> <span class="nf">Start</span> <span class="p">()</span> <span class="p">{</span> <span class="c1">//呼び出すJARのパッケージ名を指定</span> <span class="n">AndroidJavaClass</span> <span class="n">plugin</span> <span class="p">=</span> <span class="k">new</span> <span class="nf">AndroidJavaClass</span><span class="p">(</span><span class="s">"jp.example.AppController"</span><span class="p">);</span> <span class="n">AndroidJavaClass</span> <span class="n">unityPlayer</span> <span class="p">=</span> <span class="k">new</span> <span class="nf">AndroidJavaClass</span><span class="p">(</span><span class="s">"com.unity3d.player.UnityPlayer"</span><span class="p">);</span> <span class="n">AndroidJavaObject</span> <span class="n">activity</span> <span class="p">=</span> <span class="n">unityPlayer</span><span class="p">.</span><span class="n">GetStatic</span><span class="p"><</span><span class="n">AndroidJavaObject</span><span class="p">>(</span><span class="s">"currentActivity"</span><span class="p">);</span> <span class="c1">//JARのメソッドを指定する</span> <span class="n">plugin</span><span class="p">.</span><span class="nf">CallStatic</span><span class="p">(</span><span class="s">"show"</span><span class="p">,</span> <span class="n">activity</span><span class="p">);</span> <span class="p">}</span> <span class="p">}</span> </pre> <p>このスクリプトを /Assets/Plugins に作成します。その後、適当なシーンに関連付けることで完成です。ものすごく簡単ですね。iOSは…もうちょっと面倒です。</p> <p>UnityからJavaネイティブコードを呼び出す方法は、JNIとかいくつかあるけれど、JARで呼び出すだけなら、こっちの方が楽です。</p></div></div><div class="article-sns-share-buttons"><a rel="nofollow" target="_blank" class="pocket-share sns-share-button" href="http://getpocket.com/edit?title=+Unity%E3%81%A7Android+JAR%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB%E3%82%92%E5%91%BC%E3%81%B3%E5%87%BA%E3%81%99%E6%9C%80%E3%82%82%E7%B0%A1%E5%8D%98%E3%81%AA%E6%96%B9%E6%B3%95+by+zaru+%7C+Basicinc+Enjoy+Hacking%21&url=https%3A%2F%2Ftech.basicinc.jp%2Farticles%2F25"><svg class="sns-icon 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