I used OS X Grab the source — This is an easy step, however it takes a long time. For me it took over 24 hours. Such a large download only happens once, further syncing with the main source tree will be incremental. Obtain proprietary binaries — The binary drivers should be unpacked in your working directory. Start the build — You start the build using make. If you get build errors which seem related to memory, especially about the Jack server and memory then do these two things:.
If you get any communications errors related to the Jack server then just start the build again, that normally fixes it. Flash the build onto your device — You will find adb and fastboot in. What you will see is a vanilla version of AOSP. There are no Google services, no Play Store and only a few core apps. This is the bare bones of Android.
However, congratulations are in order. You have managed to build Android from its source code and flash it on to a device. That is no mean feat. Now that you have Android up and running, you can start to customize it and make your own specialist ROM. This is actually where things get hard. You are about to tinker with a guts of the Android operating system and the problem is that Android is huge.
That is the source code, the graphics, the compiled binaries, the tools, everything. That is a lot of stuff. So, start simple. Here are two simple customizations that will get you going, start on the path to being an Android firmware hacker! A relatively easy customization is to change one of the pre-built apps. If you were to develop a full alternative Android distribution then modifying or replacing some of the core apps would be a given.
In this case we are just going to tweak it, however the principles remain the same for more complex changes and revisions. The core apps are found in the directory. You can edit it with your favorite GUI editor or if you want to stay on the command line then use vi or nano.
To keep things simple what we are going to do is add a Toast that will be displayed when the app is first started. Near the top of the file underneath the long list of import statements add this line:. Now look for the onCreate function.
Towards the end of the function, before the final call to Trace. Save the file and start another build using the make command. Once the build has finished, flash it onto your device and reboot. Obviously this is a simple modification, however the potential is there to modify any of the default apps, in whatever way you please. Any self-respecting custom Android distribution must include some information about the ROM itself.
To do this we can alter the built-in Settings app and add some information to the About Phone section. Save the file and then rebuild and re-flash the firmware on your device. The above alteration is a bit of hack as really the strings should be defined in strings. If you plan to do any serious AOSP development you need to do things right! However I hope this has given you a taste of what is possible or at least given you an idea about how to build AOSP and tinker with the innards of Android! How to build your own custom Android ROM Since all the source code is available for Android you can build your own personalized firmware.
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