page.title=Android Compatibility Downloads
doc.type=compatibility
@jd:body
<p>Thanks for your interest in Android Compatibility! The links below allow
you to access the key documents and information.</p>

<h2>Android 2.1</h2>
<p>Android 2.1 is the release of the development milestone code-named
Eclair. Android 2.1 is the current version of Android. Source code for Android
2.1 is found in the 'eclair' branch in the open-source tree. Note that for
technical reasons, there is no compatibility program for Android 2.0 or 2.0.1,
and new devices must use Android 2.1.
</p>
<ul>
  <li><a href="{@docRoot}compatibility/android-2.1-cdd.pdf">Android 2.1 Compatibility Definition Document (CDD)</a></li>
</ul>

<h2>Android 1.6</h2>
<p>Android 1.6 was the release of the development milestone code-named Donut.
Android 1.6 was obsoleted by Android 2.1. Source code for Android 1.6 is found
in the 'donut' branch in the open-source tree.
<ul>
  <li><a href="{@docRoot}compatibility/android-1.6-cdd.pdf">Android 1.6 Compatibility Definition Document (CDD)</a></li>
</ul>

<h2>Compatibility Test Suite</h2>
<p>The Compatibility Test Suite (CTS) is found in the open-source tree. Specific
snapshots of the CTS are found in the same branches as for the system. (For
instance, the Android 2.1 CTS can be found in the 'eclair' branch.) The CTS user
manual is not specific to given versions.
<ul>
  <li><a href="{@docRoot}compatibility/android-cts-manual-r4.pdf">Compatibility Test Suite (CTS) User Manual</a></li>
</ul>

<h2>Older Android Versions</h2>
<p>There is no Compatibility Program for older versions of Android, such as Android
1.5 (known in development as Cupcake). New devices intended to be Android
compatible must ship with Android 1.6 or later.</p>