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[GUIDE] Custom ROM development for the rest of us [In Progress]

*** THIS IS NOT JUST ANOTHER EFFORT TO CREATE YET ANOTHER CUSTOM ROM***
Though Android is opensource, a lot of things are unknown regarding ROM development/modification. There are many custom ROMs available for Galaxy 3 (and also other phones) and lot of people are flashing them and making their phone more responsive, productive and faster; but very few people actually knew how to go about developing the ROM.
What I intend here is to find out and document correct way to build ROM for our favorite Galaxy 3, which is very popular in India.
The goal will be to develop the ROM from Android source + Drivers from stock ROM while documenting the process so that large number of people can contribute to the development.
I will shortly update the posts with what I have done.

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Can anyone help me convert system.img and userdata.img file into files flash-able by ODIN?
Thanks

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looking forward to what you come up with
Making one aint difficult keeping it bug free might get sometimes

Thanks rudolf895
I have experience in Android SDK and NDK development, but I am a noob when it comes to ROM development. Thats why this effort.
I have fetched android source using repo as well as I have also downloaded source for I5801 from Samsung open source website. After this I will look into extracting drivers from stock ROM and successfully compiling it for Galaxy 3.
rudolf895 said:
looking forward to what you come up with
Making one aint difficult keeping it bug free might get sometimes
Click to expand...
Click to collapse

abhijeet.pathak said:
thanks rudolf895
i have experience in android sdk and ndk development, but i am a noob when it comes to rom development. Thats why this effort.
I have fetched android source using repo as well as i have also downloaded source for i5801 from samsung open source website. After this i will look into extracting drivers from stock rom and successfully compiling it for galaxy 3.
Click to expand...
Click to collapse
best of luck

Looking forward to it!

abhijeet.pathak said:
Thanks rudolf895
I have experience in Android SDK and NDK development, but I am a noob when it comes to ROM development. Thats why this effort.
I have fetched android source using repo as well as I have also downloaded source for I5801 from Samsung open source website. After this I will look into extracting drivers from stock ROM and successfully compiling it for Galaxy 3.
Click to expand...
Click to collapse
Do not fell shy to ask for help u need. Together we can make it better. We are with you whenever u need us.
ARMVK Dev Team

Thanks!
Thanks a lot for your support guys..
arunmcops said:
Do not fell shy to ask for help u need. Together we can make it better. We are with you whenever u need us.
ARMVK Dev Team
Click to expand...
Click to collapse

hehe, cant wait to see what you come up with, sounds promissing btw... i am also willing to help whereever i can, whereas this wont be too much in this case i guess.
good luck and thanx...

TY ..!
Thanx alot
This would be really helpful to alot of members here

interesting ! waiting ....

I applaud your thread, I myself was thinking about such a concept.
I wanna help, but I cant do that much (basic knowledge of C and basic/little knowledge of linux and adb).
I think first there should be a list of basic stuff. Like compiling the sources, extracting factoryrfs and co from your phone etc... Sometimes if you wanna start doing something and you dont know the basics you get scared off because of their apparent tremendous lack of knowledge.
I'd probably start dabbling if somebody told me how to compile the sources.

can you also specify your work environment, toolchain and such stuff, so anyone can start from zero? there is a kernel building vm image with all tools by sztupy somewhere on the forum that is eventually of interest, and there is also an extended version containing eclipse and some more tools for full android development:
http://forum.xda-developers.com/showthread.php?t=882010
hope this helps somebody...

Did you try using it? I think the scripts are specific and cant be used by us (without altercation)

no, i have absolutely no idea of kernel compilation and all that advanced stuff, but i guess it can be adapted for our use

Yup...me too in waitin line...Now i can say i dint made a mistake by buying it...
Sent from my GT-I5801 using XDA App

abhijeet.pathak said:
Can anyone help me convert system.img and userdata.img file into files flash-able by ODIN?
Thanks
Click to expand...
Click to collapse
maybe you can create a ".tar" package including all those files.. .tar is flashable in odin..

[Q] [GT-P5113] How to add IR blaster support to a ROM when building it manually?

I am currently downloading the Validus ROM using repo. I would like to add IR blaster support, however I'm not sure where to start on that. I would think it's a kernel module that provides IR blaster support, but I'm a complete n00b when it comes to ROM building and have no idea how to find out. I'm also downloading the stock ROM from Samsung's Open Source site. How can I go about adding IR blaster support to Validus after they are downloaded?
P.S.: Sorry if this was supposed to go in development, I read the forum rules and it said no questions so I assumed...

Proper TWRP

one of the things we really need to get development started for this device is a proper version of TWRP i know @paulobrien version is partially working so far, for example an aroma based flashable file does not work properly since it does not recognize touchscreen, it would be nice if someone from @TWRP Recovery team would take it and make a proper version or some body with the knowledge and resources to do it i am willing to test those recoveries in my device and provide feedback and logs if necessary as i am currently doing with the only kernel provided here

JEANRIVERA said:
one of the things we really need to get development started for this device is a proper version of TWRP i know @paulobrien version is partially working so far, for example an aroma based flashable file does not work properly since it does not recognize touchscreen, it would be nice if someone from @TWRP Recovery team would take it and make a proper version or some body with the knowledge and resources to do it i am willing to test those recoveries in my device and provide feedback and logs if necessary as i am currently doing with the only kernel provided here
Click to expand...
Click to collapse
Hi, if you could list all of the features that doesn't work, We might be able to look into them one by one,that would make it way easier.

Learn man!

Just tell them the bugs if you faced any

Need help with building kernel (ath9k)

Hi Lads,
Past few days im trying to add the ath9k module to a kernel.
I took the emotion kernel but when i started to make the kernel i constantly receiving errors.
I googled till my eyes burned out of my skull but got no solution. Probably im doing something wrong
Im looking for someone who can build the kernel easily including the ath9k driver.
My purpose is to use Kali Nethunter with the TP-Link WL722N adapter on the Note Edge N915F.
Im so desperate that i want to pay for it. Or maybe a game on steam :highfive:
Please help me out!
Greetings.
Stefjoe

Stefjoe,
I also saw your pm. I know now that you would like that module added to the tblte kernel. Kali Nethunter is not a rom, it is an overlay of sorts. Essentially a chrooted Linux distribution running over the top of your Android phone.
Kali only supports stock roms, or some "CyanogenMod variants", so I could add this to the AOKP kernel for you, but I cannot guarantee that you will have everything you need for this to work. For instance, you are going to need packet injection, module loading and unloading, force modules, etc., etc., much more than just the one item you requested. The note edge is not on the list of supported devices for a reason, it takes much dedication and effort to set it up properly. You would also need to build your custom port of Kali to go on your system. (Unless I am mistaken, no one has made one for the Note Edge yet.)
So, have you already built a working port of kali for your phone?
I say this in the kindest of regards, but if you cannot build the kernel, can you build the kali image?
As a side note, all the tools in Kali Linux are freely available, and you can download them to your phone right now, just not in the glorified package. Having Kali is like having a toolbox. Having a tool box does not make one a mechanic. Having Kali does not make one a pentester, or cacker (unethical hacker) if you are aiming for that.
I am not opposed to you having Kali, I've used it before myself (not on a phone), but in the end, I found Debian to be just as useful, downloading the tools that actually helped me in my job/tasks.
I am just curious if you have already created the kali image you need for the Note Edge phone. In theory, if the only thing you need is a kernel with the above, then it should work with your current kernel, just without that feature. If you have not even made the image yet, then I suspect that you are going to need a lot more than what you asked for.
I hope that makes sense.

AlaskaLinuxUser said:
Stefjoe,
I also saw your pm. I know now that you would like that module added to the tblte kernel. Kali Nethunter is not a rom, it is an overlay of sorts. Essentially a chrooted Linux distribution running over the top of your Android phone.
Kali only supports stock roms, or some "CyanogenMod variants", so I could add this to the AOKP kernel for you, but I cannot guarantee that you will have everything you need for this to work. For instance, you are going to need packet injection, module loading and unloading, force modules, etc., etc., much more than just the one item you requested. The note edge is not on the list of supported devices for a reason, it takes much dedication and effort to set it up properly. You would also need to build your custom port of Kali to go on your system. (Unless I am mistaken, no one has made one for the Note Edge yet.)
So, have you already built a working port of kali for your phone?
I say this in the kindest of regards, but if you cannot build the kernel, can you build the kali image?
As a side note, all the tools in Kali Linux are freely available, and you can download them to your phone right now, just not in the glorified package. Having Kali is like having a toolbox. Having a tool box does not make one a mechanic. Having Kali does not make one a pentester, or cacker (unethical hacker) if you are aiming for that.
I am not opposed to you having Kali, I've used it before myself (not on a phone), but in the end, I found Debian to be just as useful, downloading the tools that actually helped me in my job/tasks.
I am just curious if you have already created the kali image you need for the Note Edge phone. In theory, if the only thing you need is a kernel with the above, then it should work with your current kernel, just without that feature. If you have not even made the image yet, then I suspect that you are going to need a lot more than what you asked for.
I hope that makes sense.
Click to expand...
Click to collapse
Thanks for your reply again! I kinda ported the Nethunter to Note Edge with help from this video on YT ; /watch?v=jhLBJJwB88k
Everything works fine but only the TP-Link WL722N is not working because the kernel does not have this module installed. The adapter takes care of the injection so no worries i guess. I sended u a PM.
I am a certified hacker and i know what Kali Linux is but only missing this tool and it could make my work a lot easier. So i really appreciate if u can do this for me man. Endless thanking
Greetings

stefjoe said:
Thanks for your reply again! I kinda ported the Nethunter to Note Edge with help from this video on YT ; /watch?v=jhLBJJwB88k
Everything works fine but only the TP-Link WL722N is not working because the kernel does not have this module installed. The adapter takes care of the injection so no worries i guess. I sended u a PM.
I am a certified hacker and i know what Kali Linux is but only missing this tool and it could make my work a lot easier. So i really appreciate if u can do this for me man. Endless thanking
Greetings
Click to expand...
Click to collapse
Stefjoe,
I see from your PM that you are not requesting my AKLU kernel, but the TW Emotion Kernel. I can't do that for you.
To build the kernel you need the right source, the source code for the kernel has been updated since r17 ( I think it is r2X? now). That means rolling back through the commits to find the time it was built and working properly and getting that source. It is not as simple as just going straight back to r17, the r17 version you may be using may be anywhere in the commits between r17 and r18.
Then we would need the exact toolchain he/she was building with. He says Linaro 5.1, but which one, 5.1, 5.1.1, 5.1.8? There are several.
Also, I do not build TW kernels. I only build AOSP kernels. I also don't usually build off of someone else's work. I was under the impression you wanted me to add that module to my AKLU kernel instead.
To get that specific kernel built the way you want, I recommend that you ask @Pafcholini to do that for you, since he made it originally.
If you want, I can add that module to my AKLU kernel for you, but I know the rest of the needed kernel items are in there that you need (packet injecting, force module loading, etc.) so I doubt it will work for you. You would also have to switch to AOKP, which may or may not work with your porting guide.
Sorry, but after looking at your full request, I don't think I can help you with what you need.

[ROM][TEST]Nexus 5X (Bullhead) HCE Always(off screen payment) Testing rom (AOSP OREO)

Hi.
I've edited android framework code to make HCE(card emulation) feature without turning the screen on.
But I have no device to test this feature because of samsung knox .
So I built a test rom for bullhead.
This rom is based on OPR5.170623.014.
And I want to get feedback about this rom
1. The off screen mobile payment (HCE) feature works well?
2. Then Please let me know the battery time is acceptable or not.
compared to AOSP.
Plus! I do not guarantee this rom is not work properly
If your device broke with my rom, I can't do anything for that
Download Link :
https://drive.google.com/file/d/1w-vO80Jo7O55uUeqCqG0Y83OFqToi7vs/view
Opensource :
https://github.com/HyungJu/hce-always
Apply this patch to frameworks/
Download Gapps for 8.0.0.
Thank you.

No offense, but I think whoever tests this may want to see the source code for whatever you changed.
In my case I wouldn't test this unless I looked at the code and then compiled it myself. Really, it's nothing personal.
The "chain of trust" of most ROMs is that you can easily reproduce the binary version that you can download elsewhere by building from the available source code instead if you wanted to.

Paul L. said:
No offense, but I think whoever tests this may want to see the source code for whatever you changed.
In my case I wouldn't test this unless I looked at the code and then compiled it myself. Really, it's nothing personal.
The "chain of trust" of most ROMs is that you can easily reproduce the binary version that you can download elsewhere by building from the available source code instead if you wanted to.
Click to expand...
Click to collapse
Thank you for your advice.
I uploaded a patch file that I made to github
https://github.com/HyungJu/hce-always
Thank you.

vendor.img..? opr5 14...?