[Android Software/Hacking General [Developers Only]] iamareebjamal:
ADB:-

Android Debug Bridge

Very useful program made itself by Google for Programmers and developers. Its based on command line and basically communicates with your Android to respond to certain commands. There is vast amount of knowledge about adb but its most useful commands limit to getting:-

Logcat:-

A real time log of what is happening in background of our devices. It is really useful for developers to see which component has malfunctioned and helps to narrow down their search for what failed and what needs to be fixed. Several times users are asked to give logcats of their devices which are giving errors. We will go in detail that how to get logcats in every and easiest way possible.

App Installation and Management:-

adb proves really handy if you want to install apks directly from your PC or want to batch install or delete them.

Shell Execution:-

You must have heard of Terminal Emulator. It is an app for android to execute shell commands(linux commands) which are basically present as applets in /system/bin, /system/sbin or /system/xbin(in our case) folders. A very imporant applet called busybox is installed there mainly used for execution of basic commands during root browsing or ROM installation. Many times updater script of ROMs use busybox commands to install it. Well, these commands can be initiated from your device too but they can be initiated from adb also making it easy for programmers.

Pushing and Pulling:-

Most used commands of adb. adb makes it a piece of cake for new device developers to get an ideo of structure and basic knowledge of devices by pulling command. We can pull out i.e copy any files or folders from our devices to our PC, even the root directories without rooting the devices. It help rooters and ROM chefs of new devices to get an idea and implement their mods on them. Pushing is also very useful command. It copies your files and folders from PC to your device. Very useful in pushing some /system apps and other things

Remounting and setting permissions

Basic commands:-

Of-course basic commands such as reooting and rebooting in recovery ode and download mode are supported.

Others:-

There are several other features of adb such as fastboot, aapt, etc

Setting up ADB

Pre Requirements:-

A little amount of brain

PC(This is a windows guide, if asked I will add linux and mac guide later)

Java Runtime environment or Java Developing kit

Your Device Drivers

An Android Device

Assuming you all these ready and working properly, we continue

If you are having trouble completing Pre-Requisites, there are several guides featuring them too

Start

1. First Download Android SDK. Roughly about 70 MB

2. There may be any compressed zip file or exe file

If zip file, then extract it to C:\android-sdk

If exe file then double click on it and install it in C:\ Drive(or any other drive you want)

3. Now to get adb and other tools, you need to download 'Platform Tools'

To download them, go to the android-sdk folder and double click on SDK Manager

It will ask you which package to download? However, it is your choice which package to Download, but here, we will only talk about platform

Tools. So, simply tick on Platform Tools and click on install. Once you have done it. Go to the platform-tools folder in the directory where you installed android-sdk. You will find several files there like adb, fastboot, aapt, etc

4. Now, you can backup the whole folder of android-sdk to any external storage that will make you not download package

again if you want to. You can have it placed in any computer and run it as it does not require registry to work

5. Now, you are just one step away from using adb. Next step is SKIPPING SETTING ENVIRONMENT VARIABLE

Many guides on internet say that it is to be done for making it easy for users and if you have some basic knowledge of Command Prompt,

you will know that to execute any application with command prompt, you first need to change the directory to the one where application is

placed. And to skip changing the directories every time you open CMD, you need to put that application is environment variable. Howeve, we will not do so.

6. Type cmd in the search bar. Copy cmd.exe from there. Go to the directory where you have installed android-sdk. Go to platform-tools folder. Paste cmd there, right click on it and in the settings, select Run as Administrator.

7. You are done. Now what to do in it?

ADB Commands

Type adb in command prompt. And several commands will show up on your screen. It is very difficult to analyse these all commands, so we will only talk about most used and important commands

Connect your device via USB cable

And open the CMD in platform-tools folder(Make a shortcut of it on desktop). And type the suitable commands

adb devices

Will show the list of devices attached to the PC andtheir serial numbers. If this shows up correctly on your PC, then it means that everything is fine for continuing.

Logcat

adb logcat

It will display the real time log of your device

Best time to do it is when your device boots up

Now, many users ask me how to copy the logcat and upload it from CMD

There are several methods:-

1. Right click on the Title Bar of Command Prompt. Hover the cursor over edit and select mark. Select all the things you want to copy and then click enter. All the things will be copied to clipboard.

2. This is the correct way of getting logcat saved.

adb logcat > logcat.txt

This command will create a logcat.txt document in platform-tools folder with the complete logcat of the device. Ofcourse you can type any name instead of logcat.txt

3. I prefer taking logcat this way as it neatly compiles logs of different time

adb logcat -v long > logcat.txt

This is a very nice way to get logcat.

Installing Apps

adb install %PATH OF APK%

This will install an app on your Android

For example, if my app AreeB.apk is in G:\ drive (G:\AreeB.apk)

Then I will type

adb install G:\AreeB.apk

Be sure your apk is not in a folder that has space in its name, else the command will break at space bar.

For eg:-

G:\Program Files\AreeB.apk

Mounting

However, I never found any problem in tweaking with system files with adb, but some users said that they couldn't do it, so the problem was that their system partition was mounted as Read Only(R/O)

So, it is necessary now to tell how to mount system partition as Read Write(R/W)

adb remount

It is easiest way to do so, if it does not work then

There is another method that we will discuss in ADB Shell commands section

Pushing and Pulling

For pushing,

Type

adb push %PATH TO BE PUSHED% %PATH WHERE TO BE PUSHED%

Suppose I have an app named SystemUI.apk(PATH = G:\SystemUI.apk) which I want to push in /system/app/ on my android(or in other words, install an app as a system app). Then I would type

adb push G:\SystemUI.apk /system/app/

More examples

G:\Dance.txt file to be pushed in Dance folder in sdcard

adb push G:\Dance.txt /sdcard/Dance/

OR

adb push G:\Dance.txt /mnt/sdcard/Dance/

G:\Movies folder to be transferred in SDCARD in Videos Folder

adb push G:\Movies /sdcard/Videos/

G:\system\framework\framework-res.apk to be pushed in /system/framework/

adb push G:\system\framework\framework-res.apk /system/framework/

For pulling,

push command replaces with pull and paths are swapped

adb pull %PATH TO BE PULLED FROM% %PATH TO PLACE PULLED FILE%

Example,

All system apps are to be pulled to G:\ROM\system\app

adb pull /system/app G:\ROM\system\app\

build.prop to be extracted to desktop

adb pull /system/build.prop C:\Users\Areeb\Desktop\

However, if a folder is in platform-tools folder, you don't need to type full path

Suppose if I type

adb pull /system/ system

Then a folder named system will be created inside platform-tools with all the files in system in it

If a file is in platform-tools folder, then also no need to type full path

For example,

There is an app name DeskClock.apk in this folder then, to push it to /system/app, type

adb push DeskClock.apk /system/app/

ADB Shell Commands

This mode of adb allows you to execute linux shell commands from your PC

These commands can aldo be executed through the mobile using Terminal Emulator

To initiate shell mode

Type

adb shell

You will get an prompt like this

sh-3.2#

Now you are in shell mode

adb commands won't work here and a new set of commands will work here. But we will only go in a little detail here.

Assuming you are in adb shell mode, I will only type commands that will work on shell. Note:- These commands won't work if you type them alone on cmd. But, these command will directly work on your mobile's Terminal Emulator

As these commands can also work on mobile, I am going to tell you a way of taking logcat on mobile

Type

logcat

You will see log of your device

To save this

Type

logcat > /sdcard/log.txt

A file named log.txt will be generated in sdcard

Uninstalling Applications

cd /data/app

This will change the directory to /data/app

ls

This will show the list of files in there

Suppose, there is an app named com.opera.browser (Opera Mobile) you want to uninstall it

Type

rm -r com.opera.browser

This will uninstall the app

Mounting Command:-

mount -o rw,remount /dev/block/mtdblock3 /system

Miscellanous commands:-

su: Initiates root request

du: Shows file foldrs and size

date: Shows todays date

Forgot next ones, will write later

Credits

Google: For Android and several searchings

Samsung: For Galaxy Ace s5830I

Broadcom: For their Open Sourceness

XDA Forums : For the precious knowledge

My Uncle: For gifting me this Phone

My Teachers: For teaching me English(I would not be here without them)

You: For future Thanks

Till now, thats it, will add some more things later

If any problem, I will add it too

Suggestion? They are welcome