[Galaxy Tab 2 General] Russiamen:
Multiboot project is a work done by [MENTION=4277844]chenxiaolong[/MENTION] , I do not own any of the work presented over here.I just sent the author need logs.Support All Version

About Multiboot : A project to handle different ROMS at the same time so that you actually can use different ROMS without having to wipe up device to flash ROMS, it allows installation of more thn one ROM with all the features enabled.

USAGE​

1. First, boot into your primary ROM and install the Dual Boot Patcher app

2. Open the app and go to "Roms" in the navigation drawer. It will ask if you want to set the kernel. Make sure that you do.

3. Go to "Patch zip file" in the navigation drawer and patch the ROM or zip you want to install.

In-app flashing​

To use in-app flashing, go to "Roms" in the navigation drawer, tap the floating button on the bottom right, and add the zips you want to install. You can queue multiple zips and they will all be flashed in one go. Once you've added all the zips you want to flash, click the check mark in the action bar and they will be flashed right away.

DOWNLOAD : https://snapshots.noobdev.io/(Added support 10.04)

ORIGINAL THREAD : http://xdaforums.com/show....php?t=2447534

Manual

Step 1

download and install DualbootPatcher app

if you are in motion rom do this

Step 2

Open the app

Slide the menu and go to ROMs

It will request for root access

Allow the root access

and a message will ask about to set the kernel

Select "set now" and after it said kernel set now

Step 3

reboot your device

Now after device is turned on

Go to the app and navigate "Patch Zip File" from the menu

and tap that + button select zip of ROM you want to patch

A window will come up and if you see in "your device selected by default" you done everything right.

then:

If you are CMuser ( means you have a cm12.1 , cm11 or ... on your primary rom)

and want to install another cyanogeonmod rom (cm11 , cm12.1 ...)

Select the partition configuration as "Secondary"

If you are trying to install another ROM that has a huge system

Select partiton configuration as "data slot" and select an ID for the ROM

better to be a number

(It will be installed on data partition this means it will use the device internal storage space )

and select continue and set where to place patched file .

you can add more files to patch there .

and after you are ready to patch the files tap that tick button in action bar

to start patching

Step 4

After you patched the zip ROM go ahead and navigate to ROMs from the menu

select button down corner and select patched zip you patched

and then select keep location (or if you want you can change the location ) and add more patched zips or tap the up corner tick to start install

note : if any thing wrong happend PM me on telegram and send me multiboot.log in internal storage.

Step 5

after ROM is installed

it should be selected the installed rom .

tap and switch to primary rom

now use three dot on side of primary and select update ram disk

and then select reboot now

now after device rebooted go back to the app navigate to roms

now use three dot on side of new ROM you installed and select update ram disk

after it said done

select the rom you installed . ( tap on the icon of it or name )

( if you saw a message about checksum select continue )

reboot the device and see the magic !!!!

your new ROM is booting !!!!

Cool, let's stop enjoying and continue :P

Step 6

now after your new ROM booted

take your time to setup the device

and go and install dualboot patcher app again

now open the app

Go to ROMs and allow root access and

now use three dot menu in side of primary ROM and select update ramdisk

now use three dot in side of new ROM and select update ramdisk

and reboot

Soon there will be video instruction

NOTE:Support 4.2-6.0

CREDITS

​

All credits goes to [MENTION=4277844]chenxiaolong[/MENTION] for his hard work on this project, kindly say thanks to him

INFO​

Quick info
The patcher offers several locations for installing ROMs:

Primary: This is normally used for installing a zip to the primary ROM. It is not required, but is strongly recommended because it has code to prevent the zip from inadvertently affecting other ROMs.
Dual: Dual/Secondary is the first multiboot installation location. It installs to the system partition. This is a good spot for installing a second ROM because it doesn't take any space away from the internal storage.
Multi-slots: There are 3 multislots: multi-slot-1, multi-slot-2, multi-slot-3. These install to the cache partition. This is specifically for devices, like the Galaxy S4, that have a massive cache partition.
Data-slots: There can be an unlimited number of data slots. These install to the data partition and eat up space on the internal storage. This is useful for devices where the system partition is nearly full and the cache partition is tiny. These slots are named "data-slot-[id]", where "id" is something you provide in the app.

With that said, let's get to the "how to"!

First, boot into your primary ROM and install the Dual Boot Patcher app
Open the app and go to "Roms" in the navigation drawer. It will ask if you want to set the kernel. Make sure that you do.
Go to "Patch zip file" in the navigation drawer and patch the ROM or zip you want to install. You can select one of the installation locations described above.

There are two ways of flashing the patched zip file. You can either flash it normally from recovery or flash it using the in-app flashing feature. Both methods are explained below.

Flashing from recovery

To flash from recovery, just flash the patched zip file like you would for any other zip. Nice and simple.

In-app flashing

To use in-app flashing, go to "Roms" in the navigation drawer, tap the floating button on the bottom right, and add the zips you want to install. You can queue multiple zips and they will all be flashed in one go. Once you've added all the zips you want to flash, click the check mark in the action bar and they will be flashed right away.

App and data sharing

DualBootPatcher very recently got support for sharing apps and their data across ROMs. Maybe sharing is somewhat of a misleading term. The feature actually makes Android load the shared apps and data from a centralized location, /data/multiboot/_appsharing. So you're not sharing apps from one ROM to another per se. The ROMs are just loading the apps from one shared location. Let me make this clearer with an analogy.

Think of the people in a company office as ROMs. You want to share with your coworkers some documents (apps). Instead of telling them to come over to your desk to see those documents (sharing apps from one ROM to another), everyone goes to the conference room to look at the documents together (loading apps from a shared location). That's how app and data sharing is implemented.

To use app sharing, follow these steps in every ROM that you want to use app sharing:

Install the app you want to share
Open DualBootPatcher and go to "App Sharing" in the navigation drawer
Enable individual app sharing
Tap "Manage shared applications" and enable APK/data sharing for the app
Reboot

When you uninstall an app that's shared, it simply become unshared for the current ROM. That way, other ROMs are not affected. To continue the analogy above, if you quit your job, you won't shred the documents that everybody else was looking at.

If you unshare an app's data, it will go back to using the data it had before it was shared. In other words, you leave the conference room and go back to work on your own documents at your desk.

How do I...?

Switch the ROM if something doesn't work properly?

You can flash the DualBootUtilities zip from recovery. It will provide a menu interface that allows switching to the various ROMs.

If you have TWRP, you can also switch manually by tapping Install -> Images (bottom right) -> Go to /sdcard/MultiBoot/[Your ROM]/ -flash boot.img.

Wipe /cache, /data, /system, or dalvik-cache?

The easiest way is to do it from the app while booted in another ROM. Just go to "Roms" in the navigation drawer, tap the 3 dots options menu for the ROM you want to wipe, and tap "Wipe ROM".

Alternatively, flash the DualBootUtilities zip from recovery, which will also allow you to wipe a ROM.

NOTE: Don't use the recovery's built-in wiping abilities as that may delete non-primary ROMs!

Update the primary ROM?

Patch the zip for primary and flash it. The "primary" installation target is designed so that other ROMs won't be affected when you want to flash something for the primary ROM.

Update a non-primary ROM?

Patch and flash the zip exactly like how you did it the first time.

Flash a mod or custom kernel for the primary ROM?

Patch it for primary before flashing. If the zip does not wipe /cache, it is also safe to flash it directly.

Flash a mod or custom kernel for a non-primary ROM?

Just patch and flash it