[Tutorial]How to decompile/recompile/Sign Whatsapp.apk

Yorzua · Jan 30, 2012

Hi everyone,

Working around in some apk's, I noticed that some apps are more tricky to work with.
I will show you in this tutorial how to decompile/recompile/Sign Whatsapp.apk

Requirements :
My Apktool -Yorzua Kit
Notepad++

I just added a complete KIT including all the tools in one folder.
no need anymore to use Openssl or change/move to another program.

to decompile :

Code:

apktool d <yourwhatsappname>.apk ( can be whatever name you give to your apk )

edit the xml/smali you want :
see my tuto here to give an idea how to edit the xml files and smali files with Notepad++ (Written on C++ and using Win32API, you will be able to easily change, copy, trace, find all the codes you will find in this guide ).

to compile :

Code:

apktool b <yourwhatsappname> ( can be whatever name you give to your apk )

to sign :

Code:

java -jar SignApk.jar testkey.x509.pem testkey.pk8 <yourwhatsappname>.apk <yourwhatsappname>_signed.apk

Those following screenshots are some examples of what you can achieve by decompiling - editing at your taste - compiling - signing an apk like Whatsapp

Or even the 1st Whatsapp Transparent in the web !!!

I am quite busy at the moment but if you are interested on my work,
please visit my Whatsapp MODS Thread

Or my new tuto "Create your 9.png !"
http://xdaforums.com/show....php?t=1511537

I thought it is a good addition to this whatsapp tuto, especially for the bubbles.9.png's

Click on the thanks if it helps you as i do for each of you

If you come by my thread and like my work, i ask nothing more than a little thanks for the effort.
If you dont, then just give me credits if you use it.
Thanks for reading, i wish you a great day ☼

antonda · Jan 30, 2012

Thanks bro

Sent from my GT-I9000 using Tapatalk

cybermessiah · Jan 30, 2012

There is another way to sucessfully sign the apk without use of Open SSL to generate the key.p8 and certificate.pem files and without having to use SignApk.jar.

Auto-sign is another tool that eliminates the use of those steps.

First copy the official WhatsApp.apk into the Autosign folder
Change extension to zip and replace your pngs in the drawable folders
Be sure to delete the META_INF from the apk
Extract the edited and recompiled xmls from the modded apk created in Apk tool (res>layout)
Overwite the xml into the WhatsApp.zip in the Auto-sign folder
Return the Whatsapp extension to apk
Use sign.bat to sign the apk and you are good to go!

Auto-sign generates the key.pk8 and certificate.pem files automatically and applies them automatically to the apk, hence eliminating the necessity for Openssl and SignApk.jar... basically saves an extra step.

Works for me well

Yorzua · Jan 30, 2012

Easy Kit

cybermessiah said:
There is another way to sucessfully sign the apk without use of Open SSL to generate the key.p8 and certificate.pem files and without having to use SignApk.jar.

Auto-sign is another tool that eliminates the use of those steps.

First copy the official WhatsApp.apk into the Autosign folder
Change extension to zip and replace your pngs in the drawable folders
Be sure to delete the META_INF from the apk
Extract the edited and recompiled xmls from the modded apk created in Apk tool (res>layout)
Overwite the xml into the WhatsApp.zip in the Auto-sign folder
Return the Whatsapp extension to apk
Use sign.bat to sign the apk and you are good to go!

Auto-sign generates the key.pk8 and certificate.pem files automatically and applies them automatically to the apk, hence eliminating the necessity for Openssl and SignApk.jar... basically saves an extra step.

Works for me well

Way more simple than that >

I just added a complete KIT including all the tools in one folder
no need anymore to use Openssl or change/move to another program

I also includes Command.shell file which will allow you to directly type the commands from the folder directory ( very easy even if you are a noob )

Just follow the OP

Yorzua · Feb 1, 2012

Verba volant, scripta manent !!!!

More crap for this piece of s....

cybermessiah said:
@ Morrancos ... maybe read the actual posts prior to his comment.

One screenshot of the decompiling tool he uses and one screenshot of a successfuul modification AFTER I told him exactly what xmls needed modifying make him responsibile for me gaining a deeper comprehension of theming?

YOu told me which xml ? is it a ****ing joke ?
Since when i need you to know which xml to edit ?

I posted my screenshot here = 30th January 2012, 04:43 PMway before your post about xml ... here = 30th January 2012, 05:03 PM

And you wrote "told him exactly" ?

cybermessiah said:
FINALLY.
I was correct about it being those xmls!
Used APKtool to decompile and recompile with edits to those two xmls I suspected.

Here is my BLACK Whatsapp which required not less than 34 xmls in layout/drawable hdpi/values and 4 smalis to make it

YOU ARE TRULLY PATHETIC INSULTING ME AGAIN AS your "girlfriend" ....
I HOPE MODS WILL SEE THAT YOU ARE NOT HERE TO SHARE BUT ON YOUR OWN SELFISH ....

=====================================
just kept as we never know with those guys ...

j1po · Feb 2, 2012

how to use your easy manager package?
because in tutor you type "apktool d whatsapp.apk"

but in zip, no apktool.exe beside apktool.jar
I use "apktool.jar d whatsapp.apk" and it works..new folder created with res and smali inside it

But how to compile ?
Using "apktool.jar b whatsapp.apk" nothing happened

thanks

Yorzua · Feb 2, 2012

More clear

j1po said:
how to use your easy manager package?
because in tutor you type "apktool d whatsapp.apk"

but in zip, no apktool.exe beside apktool.jar
I use "apktool.jar d whatsapp.apk" and it works..new folder created with res and smali inside it

But how to compile ?
Using "apktool.jar b whatsapp.apk" nothing happened

thanks

We can always improve

OP updated to be more clear for everyone

to decompile :

Code:

apktool d <yourwhatsappname>.apk ( can be whatever name you give to your apk )

edit the xml/smali you want :
see my tuto here to give an idea how to edit the xml files and smali files with Notepad++ (Written on C++ and using Win32API, you will be able to easily change, copy, trace, find all the codes you will find in this guide ).

to compile :

Code:

apktool b <yourwhatsappname> ( can be whatever name you give to your apk )

to sign :

Code:

java -jar SignApk.jar testkey.x509.pem testkey.pk8 <yourwhatsappname>.apk <yourwhatsappname>_signed.apk

j1po · Feb 2, 2012

Thanks, I got it

can you share, which xml that handle "group bubble" color in group chat?
which your black mod show grey

and also gradient bubble border (red-blue) ?

thanks

Yorzua · Feb 2, 2012

j1po said:
Thanks, I got it

can you share, which xml that handle "group bubble" color in group chat?
which your black mod show grey

and also gradient bubble border (red-blue) ?

thanks

Do you mind to point me what you need by a screenshot, please ??
Would be more easy for me

recent changes

j1po · Feb 2, 2012

Yorzua said:
Do you mind to point me what you need by a screenshot, please ??
Would be more easy for me

Where can I change contact list background color to black like picture above ?

1. Group chat "group bubble" color --> public/colors.xml ??
2. Bubble border gradient color -->forget it, found it on high-res/

thanks a lot man

y3mita · Feb 2, 2012

Please ignore.......

Yorzua · Feb 2, 2012

j1po said:
Where can I change contact list background color to black like picture above ?

1. Group chat "group bubble" color --> public/colors.xml ??
2. Bubble border gradient color -->forget it, found it on high-res/

thanks a lot man

Thanks for the screenshot.
Both are 9.png files _ you cannot change the background of the group bubble with an xml, same story for the border of the bubble

I did from scratch those bubbles.9.png ( nightmare of some themers )
I will have to publish in xda a real, clear, short, illustrated TUTO "how to create 9.png files" but i am missing time actually.

Maybe i can change them for you tomorrow if you post your wishes

Yorzua · Feb 6, 2012

example of my last work

Recent work on the latest version : WhatsApp_DARKYorzua_2-7-3169

Yorzua · Feb 6, 2012

thanks

people asked me for more panoramic view of my dark theme so here it is

Thanks guys for your support _ feel free to post your questions in my tuto to make benefit all the coming members

DirkTeur Velserbroncx · Feb 6, 2012

Yorzua said:
Recent work on the latest version : WhatsApp_DARKYorzua_2-7-3169

Man, you've gotta good thing going overhere, (Carbon Fibre look) went to your site this is realy, realy awesome finally some great explanation about theming and such.

Dude you just rocked my world and i'll be reading and trying now for a while.
thanks for your effort and please go on doing what you do.

Yorzua · Feb 6, 2012

Thanks

DirkTeur Velserbroncx said:
Man, you've gotta good thing going overhere, (Carbon Fibre look) went to your site this is realy, realy awesome finally some great explanation about theming and such.

Dude you just rocked my world and i'll be reading and trying now for a while.
thanks for your effort and please go on doing what you do.

Thanks a lot for your appreciation

Feel free to ask me any help you need.
I am living in Delft actually so if we meet in the trains, could share my dark mod with you

( screenshot updated just below )

I like to share my recent work screenshots

Fijne dag meneer ☼

seimu · Feb 6, 2012

Thank you very much for the tutorial!

Yorzua · Feb 6, 2012

seimu said:
Thank you very much for the tutorial!

Glad i could help you

seimu · Feb 6, 2012

amazing theme, a very good job.

as you do to change the background and font color of your chat list ¿? also with the xml ¿?

I applaud you

Yorzua · Feb 6, 2012

xml code

seimu said:
amazing theme, a very good job.

as you do to change the background and font color of your chat list ¿? also with the xml ¿?

I applaud you

thanks for your appreciation but no need to applaud me, your themes are good too

You can edit few xml in order to set the background as a unique color :

android:background="#<hexadecimal color code you want to display>"

or as a png you create and place in drawable-hdpi :

android:background="@drawable/<the png name you want>"

or as a predefined style :

android:background="@style/<name of your style>"

For the font color of the chat list, just edit the color in :

conversation_text_row_left
conversation_text_row_right

date/name/font color of you/answering contact can be setup as well in the same section

Hope it helps you and unfortunately those bastards who are now enjoying my tuto and insulting my name at the same time

[Tutorial]How to decompile/recompile/Sign Whatsapp.apk

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