title: Kivy Apk build with buildozer error: # Java compiler (javac) not found, please install it
body: <p>I'm trying to build an apk of my kivy project.
  I have installed buildozer in python 2.7 Using PyCharm, then I built the <code>.spec</code>,
  but when I tried to create the apk, I got these results:
  i have insatalled jdk7 and 8</p>
  
  <ol>
  <li><p>Using: <code>buildozer Android debug</code></p>
  
  <pre><code>#Check configuration tokens
  # Ensure build layout
  # Check configuration tokens
  # Preparing build
  # Check requirements for android
  # Java compiler (javac) not found, please install it.
  </code></pre></li>
  <li><p>Using:  <code>buildozer -v Android debug</code></p>
  
  <pre><code># Check configuration tokens
  # Ensure build layout
  # Check configuration tokens
  # Read available permissions from api-versions.xml
  # Preparing build
  # Check requirements for android
  # Run 'dpkg --version'
  # Cwd None
  /bin/sh: dpkg: comando non trovato
  # Search for Git (git)
  #  -&gt; found at /usr/bin/git
  # Search for Cython (cython)
  #  -&gt; found at /usr/bin/cython
  # Search for Java compiler (javac)
  # Java compiler (javac) not found, please install it.
  </code></pre></li>
  <li><p>Using: <code>buildozer Android debug deploy run</code></p>
  
  <pre><code># Check configuration tokens
  # Ensure build layout
  # Check configuration tokens
  # Preparing build
  # Check requirements for android
  # Java compiler (javac) not found, please install it.
  </code></pre></li>
  </ol>
  
  <p>How do I get this to work?</p>