Building a custom ROM with AOSP - Android Q&A, Help & Troubleshooting

Hello,
I'm new to Android modding and I already read many guides, tutorials, etc. But every time people build a new ROM they don't use the AOSP but the CM source. So I like to build a clean, not modified ROM from the AOSP sources but when I tried the first time, I didn't know what I need to do because Google's guide only tells about how to build the ROM for a Nexus device and not for mine (I'm using the Motorola Moto G 2014 as primary device).
So first of all, is it possible to build the AOSP for my device or do I have to make any modifications in sources (or it is for one person just not possible to port the AOSP to my device) ?
If it is possible, what do I have to do? Is there any guide or tutorial how to build the AOSP for a non Google phone in general?
Thanks for responses
firefligher

Related

[Q] Compiling AOSP

Hello,
So my brother bough a chinese smartphone. Many chinese apps where preinstalled and I have been able to remove them, so you wouldn't notice it is a chinese device. However it would be neat if this phone would have proper AOSP.
The current ROM is almost AOSP, minor modifications have been done. This made me curious, would one be able to compile AOSP from source, and use the original kernel (if compatible)? Is a kernel extractable from a ROM to be used in another? Do you need the sources from the manufacturer in order to succesfully build AOSP?
Please note I'm not trying to do this, I'm just curious if it could be done. I have done a fair amount of research but most of the tutorials are about compiling kernels, something I DON'T want to do.
_Roysten said:
Hello,
So my brother bough a chinese smartphone. Many chinese apps where preinstalled and I have been able to remove them, so you wouldn't notice it is a chinese device. However it would be neat if this phone would have proper AOSP.
The current ROM is almost AOSP, minor modifications have been done. This made me curious, would one be able to compile AOSP from source, and use the original kernel (if compatible)? Is a kernel extractable from a ROM to be used in another? Do you need the sources from the manufacturer in order to succesfully build AOSP?
Please note I'm not trying to do this, I'm just curious if it could be done. I have done a fair amount of research but most of the tutorials are about compiling kernels, something I DON'T want to do.
Click to expand...
Click to collapse
It is definitely possible, but will take many hours of work of you want to achieve a stable daily driver state. Usually the kernel will need modifications to make it work with the AOSP ROM.
Sent from my SGH-T999 using Tapatalk 2
Say the rom uses a kernel that works with AOSP, can one build the Android OS using the already compiled kernel from the device?

How to build rom

I know Its pretty dumb to ask after seeing a lot of tutorial here, But I really can't understand! My Device is a huawei ascend y300. I have lots of custom rom on various forums. So I wanna built one myself! One of the developer built cm 11 from source and he is rolling out nightly on a daily basis. My interest is to build the cm11 too on my own computer based on his device specific changes he has done. and he has done a lots of changes for our device. Also if I can make any other rom from its source based of his work like mokee rom, or slimbeam etc. ANy help is appriciated. thnk you

how to port device to different flavor of android?

Ok so I have built cm11 for my device (galaxys s 4g), and ported cm11 from another device to (aries -> galaxy s 4g). CM11 has too much going on IMO and I just want pure aosp on my device, the problem is that there are no (recent) aosp roms for my device, or any similar devices.
So how do I port my device to a different flavor of android when there are no roms of that flavor?
What have I tried?
So far I have setup the aosp 4.4 repo to a different folder than my cm11 repo (the build environment files should be the same right?)
I tried using the manifest from the cm11 rom and buidling with aosp,that didnt work it didnt even finish compiling =(.
I browsed the aosp source for other devices by the same manufacturer, but everything looked completely different from what I am used to.
The most helpful guide in this direction sofar has been cyanogenmods guide but it has left me with more questions than answers.
What [I think] I need to know
Custom recovery - aosp doent seem to include a recovery, the cm guide says to start with the recovery. So i need to know if I need to add a custom recovery to aosp, or if i can install aosp roms from twrp without breaking it.
Binaries - It is safe to use the binaries used in CM11 for aosp/any other flavor, or are the binaries flavor specific? (im thinking they are safe to use, but not entirely sure).
Device files - what files should be safe to use for any flavor?
Kernel - Cm builds the kernel when you compile the rom (or so it says), does aosp build the kernel when you build the rom, or do I have to build the kernel separately? Is it safe to say use a CM11 kernel with an aosp rom?

Build ROM from scratch

I would like to develop a custom ROM for my device. I read some guides and obtained some basic knowledge, but still don't know how to start. So I would like to ask some questions to test my knowledge and expand them.
My device: Wiko View
My Android version (actually installed): 7.1.2 almost pure Android (just some third-party apps)
Desired Android version: AOSP 9.0 (maybe?)
So as far as I know I need these things:
AOSP Source Code (9.0)
Kernel
Vendor (tree or blobs?)
Device tree
So for the AOSP: I can get it from the repo hosted by Google. How should it look once downloaded?
For the kernel: should I use that from my actual ROM, or the most recent one? And how to include it in my ROM before compiling?
For the Vendor: As far as I read, with project treble I shouldn't edit this. But since I'm not developing a treble ROM, I'm in troubles, right? In older ROMs (before Oreo and Treble), they're stored in /system/vendor. Is just that folder or are there more? Do I need to update something? Where do I need to put this folder?
For the device tree: I read some guides that explains how to extract it from ROM (only from 5.0 and up, since mine is 7.1 no problems, I hope). Is this right or are there other ways? Or do I need to write it myself?
I'm going to thanks anyone in advance. I know there are plenty of questions, but I hope this thread will be a place for begginer (like me) to know more about compiling from source a ROM. Have a great day!

Need help to make a ROM

Since Android is open source, I decided to learn code and make my own ROM as a fun project. I found a guide on Android Authority on this topic. But they said I need a nexus device to flash my rom to test. I have a spare Samsung device. Is it possible to use this device for testing?
0
Seppppx said:
You don't gave to had a nexus device. The guide is pretty old. Googles first Pixel phone was launched 10 days before the video, so they still recommended a nexus.
Google nexuses had a device tree made for them and all the tools needed to build Android for it were available. Google Pixels do the same developments wise.
I don't know if you want to learn how to build a ROM like AOSP or LineageOS or you want to make your own custom ROM.
But you can find a tutorial on a YouTube channel called AlaskaLinuxUser. I would with his "where do I start" video. He explains a lot about what you should learn first.
The Android authority guide is extremely oversimplified.
Click to expand...
Click to collapse
Thanks
You can use ANY device to test a rom, granted you have the device/kernel/vendor trees. Start off by building something like lineage, and then modifying stuff in the lineage source to make your own custom rom. The guide on androidauthority is way too simplified and only goes into the basics. Learn cherry-picking features using git

Categories

Resources