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Where can I browse the source code for any Android Open Source Project (AOSP) application (for example the Contacts application)? Is the only way to clone the entire source repository for all of AOSP?
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Since December 2019, you can use the new official public code search tool for AOSP: cs.android.com. There's also the Android official source browser (based on Gitiles) has a web view of many of the different parts that make up android.
To that end, Android is a full, production-quality operating system for consumer products, complete with customizable source code that can be ported to nearly any device and public documentation that is available to everyone (in English at source.android.com and in Simplified Chinese at source.android.google.cn).
The Android Open Source Project (AOSP) is a collection of Git repositories, which are managed together using the Repo tool. Most Android development tools (such as GitHub) can't see the source code the way that it's laid out when it's checked out on the system.
Everything is mirrored on omapzoom.org. Some of the code is also mirrored on github.
Contacts is here for example.
Since December 2019, you can use the new official public code search tool for AOSP: cs.android.com. There's also the Android official source browser (based on Gitiles) has a web view of many of the different parts that make up android. Some of the projects (such as Kernel) have been removed and it now only points you to clonable git repositories.
To get all the code locally, you can use the repo helper program, or you can just clone individual repositories.
And others:
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2020: The official AOSP code search https://cs.android.com/
You can view the source code through http://developer.android.com, when you're reading the API there will be a link to the matching source code on GitHub, you just need to add the Android SDK Reference Search Plugin on Chrome.
I blogged about it here:
http://blog.blundellapps.com/add-source-code-links-to-android-apis/
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I stumbled across Android XRef the other day and found it useful, especially since it is backed by OpenGrok which offers insanely awesome and blindingly fast search.
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I've found a way to get only the Contacts application:
git clone https://android.googlesource.com/platform/packages/apps/Contacts
which is good enough for me for now, but doesn't answer the question of browsing the code on the web.
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You can browse Android SDK samples from your smartphone using "Code Search": https://market.android.com/details?id=sqwady.codesearch
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This eclipse plugin allows for inline source viewing and even stepping inside the Android source code:
http://code.google.com/p/adt-addons/
(edit: specifically the "Android Sources" plugin: http://adt-addons.googlecode.com/svn/trunk/source/com.android.ide.eclipse.source.update/)
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