title: Can't get android-maven-plugin to recognize SDK path
body: <p>I've tried every advertised method to specify the path to my Android SDK when trying to build an Android app using the android-maven-plugin, and nothing works. No matter what I do, when I run</p>
  
  <p><code>mvn clean install</code></p>
  
  <p>I get</p>
  
  <p><code>... Could not find tool 'aapt'. Please provide a proper Android SDK directory path as configuration parameter &lt;sdk&gt;&lt;path&gt;...&lt;/path&gt;&lt;/sdk&gt; in the plugin &lt;configuration/&gt;. As an alternative, you may add the parameter to commandline: -Dandroid.sdk.path=... or set environment variable ANDROID_HOME.</code></p>
  
  <p>I set env variable ANDROID_HOME to point to the root directory of the SDK, and exported it. Then </p>
  
  <pre><code>&lt;plugin&gt;
      &lt;groupId&gt;com.jayway.maven.plugins.android.generation2&lt;/groupId&gt;
      &lt;artifactId&gt;android-maven-plugin&lt;/artifactId&gt;
      ...
      &lt;configuration&gt;
          &lt;sdk&gt;
              &lt;path&gt;${env.ANDROID_HOME}&lt;/path&gt;
              &lt;platform&gt;19&lt;/platform&gt;
          &lt;/sdk&gt;
          ...
      &lt;/configuration&gt;
  &lt;/plugin&gt;
  </code></pre>
  
  <p>does not work. (and I have API 19 installed in the SDK)</p>
  
  <pre><code>&lt;plugin&gt;
      &lt;groupId&gt;com.jayway.maven.plugins.android.generation2&lt;/groupId&gt;
      &lt;artifactId&gt;android-maven-plugin&lt;/artifactId&gt;
      ...
      &lt;configuration&gt;
          &lt;sdk&gt;
              &lt;path&gt;/absolute/path/to/sdk&lt;/path&gt;
              &lt;platform&gt;19&lt;/platform&gt;
          &lt;/sdk&gt;
          ...
      &lt;/configuration&gt;
  &lt;/plugin&gt;
  </code></pre>
  
  <p>does not work </p>
  
  <pre><code> &lt;properties&gt;
           &lt;android.sdk.path&gt;/absolute/path/to/sdk&lt;/android.sdk.path&gt;
   &lt;/properties&gt;
  </code></pre>
  
  <p>Does not work. And</p>
  
  <pre><code>mvn clean install -Dandroid.sdk.path=/absolute/path/to/sdk
  </code></pre>
  
  <p>Does not work.</p>
  
  <p>I've also tried appending the tools, platform-tools, and build-tools/19.1.1 directories in the SDK to $PATH, and this does not work either. The aapt tool is available on my path, but the maven plugin refuses to see it. I searched the web, and the only advice I see is to do what I've done.</p>
  
  <p>What am I missing? I'm doing this on an OSX system.</p>