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AOSP building blocks

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Daniele Bonaldo @danybony_ +DanieleBonaldo danybony Android Software Craftsman

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Repo and manifest Usually a single project = single repository

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Repo and manifest AOSP = more than 450 repositories

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Repo and manifest Enter repo

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Repo and manifest repo init -u http://your.company.repo/manifest -b working_branch -m manifest_name.xml

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Repo and manifest [...]

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Repo and manifest

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Repo and manifest

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Repo and manifest

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Repo and manifest

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Repo and manifest repo sync -j (--jobs)

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AOSP Source Code http://elinux.org/Master-android

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AOSP Source Code Some examples: ● development ● frameworks ● packages ● vendor

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Edit the source Jack M. on Flickr

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IDE ./development/tools/idegen/idegen.sh Project definition files generated in the root of the working dir

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Search the source

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@hide Context.sendBroadcastAsUser(Intent, UserHandle); Context.startActivityAsUser(Intent, UserHandle); Context.startServiceAsUser(Intent, UserHandle); @hide public UserHandle(int userId)

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@hide public UserHandle(int userId) @hide

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@hide public static UserHandle getUserHandleForUser(int userId) { try { Class userHandleClass = UserHandle.class; Constructor constructor = userHandleClass.getDeclaredConstructor(int.class); constructor.setAccessible(true); return constructor.newInstance(userId); } catch (InvocationTargetException e) { logUnableToFetchUserHandleForUser(userId, e); } catch (NoSuchMethodException e) { logUnableToFetchUserHandleForUser(userId, e); } catch (InstantiationException e) { logUnableToFetchUserHandleForUser(userId, e); } catch (IllegalAccessException e) { logUnableToFetchUserHandleForUser(userId, e); } return null; } REFLECTION

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Build environment https://source.android.com/ source/initializing.html

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Mac OS X build environment Case-sensitive disk image Chris McVeigh on Flickr

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source build/envsetup.sh Setting up the build environment Check for missing dependencies

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lunch Choose the target product and build variant ● eng ● userdebug ● release

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make export USE_CCACHE=1 make -jX X = # of working threads

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Build for devices Additional proprietary libraries required Placed under vendor/

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Install In out/target/product/DEVICE_NAME/ ● recovery.img ● boot.img ● system.img ● userdata.img

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Install adb reboot bootloader fastboot flashall -w

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Speeding up the dev cycle make alias for single projects m = make from the top of the tree mm = make from the current directory mmm = make from the given directory mmma = make from the given directory WITH dependencies

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Speeding up the dev cycle adb shell stop adb sync adb shell start

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Contributing to AOSP https://source.android.com/ source/contributing.html

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Contributing to AOSP

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Questions? Daniele Bonaldo on G+

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We’re hiring! [email protected]