diff --git a/README.rst b/README.rst
index e0925d4..f141a29 100644
--- a/README.rst
+++ b/README.rst
@@ -37,6 +37,7 @@ Contents
   * `Check Debian Linux official packages <#check-debian-linux-official-packages>`_
   * `Check Ubuntu Linux official packages <#check-ubuntu-linux-official-packages>`_
   * `Check Anitya (release-monitoring.org) <#check-anitya>`_
+  * `Check Android SDK <#check-android-sdk>`_
   * `Manually updating <#manually-updating>`_
   * `Version Control System (VCS) (git, hg, svn, bzr) <#version-control-system-vcs-git-hg-svn-bzr>`_
   * `Other <#other>`_
@@ -380,6 +381,16 @@ This enables you to track updates from `Anitya <https://release-monitoring.org/>
 anitya
   ``distro/package``, where ``distro`` can be a lot of things like "fedora", "arch linux", "gentoo", etc. ``package`` is the package name of the chosen distribution.
 
+Check Android SDK
+-----------------
+This enables you to track updates of Android SDK packages listed in ``sdkmanager --list``.
+
+android_sdk
+  The package path prefix. This value is matched against the ``path`` attribute in all <remotePackage> nodes in an SDK manifest XML. The first match is used for version comparisions.
+
+repo
+  Should be one of ``addon`` or ``package``. Packages in ``addon2-1.xml`` use ``addon`` and packages in ``repository2-1.xml`` use ``package``.
+
 Manually updating
 -----------------
 This enables you to manually specify the version (maybe because you want to approve each release before it gets to the script).
diff --git a/nvchecker/source/android_sdk.py b/nvchecker/source/android_sdk.py
index d90e754..386b596 100644
--- a/nvchecker/source/android_sdk.py
+++ b/nvchecker/source/android_sdk.py
@@ -1,5 +1,5 @@
 # MIT licensed
-# Copyright (c) 2013-2017 lilydjwg <lilydjwg@gmail.com>, et al.
+# Copyright (c) 2017 Yen Chi Hsuan <yan12125 at gmail dot com>
 
 import os
 import re
@@ -7,19 +7,33 @@ from xml.etree import ElementTree
 
 from . import session
 
-ANDROID_REPO_MANIFESTS = {
+_ANDROID_REPO_MANIFESTS = {
   'addon': 'https://dl.google.com/android/repository/addon2-1.xml',
   'package': 'https://dl.google.com/android/repository/repository2-1.xml',
 }
 
-async def get_version(name, conf):
-  repo_xml_url = ANDROID_REPO_MANIFESTS[conf['repo']]
-  pkg_path_prefix = conf['android_sdk']
+_repo_manifests_cache = {}
+
+async def _get_repo_manifest(repo):
+  if repo in _repo_manifests_cache:
+    return _repo_manifests_cache[repo]
+
+  repo_xml_url = _ANDROID_REPO_MANIFESTS[repo]
 
   async with session.get(repo_xml_url) as res:
     data = (await res.read()).decode('utf-8')
 
   repo_manifest = ElementTree.fromstring(data)
+  _repo_manifests_cache[repo] = repo_manifest
+
+  return repo_manifest
+
+async def get_version(name, conf):
+  repo = conf['repo']
+  pkg_path_prefix = conf['android_sdk']
+
+  repo_manifest = await _get_repo_manifest(repo)
+
   for pkg in repo_manifest.findall('.//remotePackage'):
     if not pkg.attrib['path'].startswith(pkg_path_prefix):
       continue
diff --git a/tests/test_android.py b/tests/test_android.py
index 48d3160..36f5260 100644
--- a/tests/test_android.py
+++ b/tests/test_android.py
@@ -1,5 +1,5 @@
 # MIT licensed
-# Copyright (c) 2013-2017 lilydjwg <lilydjwg@gmail.com>, et al.
+# Copyright (c) 2017 Yen Chi Hsuan <yan12125 at gmail dot com>
 
 import pytest
 pytestmark = pytest.mark.asyncio