Android Debug Bridge

Android Debug Bridge

The Android Debug Bridge (ADB) is a versatile command line tool that lets you connect with 
a device. The ADB command facilitates a variety of device actions, such as installing and 
debugging applications and provides access to the Unix shell that you can use to run a variety
 of commands on your device. Is a client-server program that has three components:

• A client, who sends commands. The client runs on his development machine. You can 

invoke a client from a command line terminal by issuing an Android Debug Bridge command.

• A hidden program (ADBD) runs commands on the device. The program runs as a 

background on every device.

• A server, which manages the communication between the client and the daemon. The 

server acts as a background in your development device.

How Android Debug Bridge works

When an ADB client starts, the client first checks whether an ADB server process is already
 running. If it is not there, it starts the server process. When the server starts, it is connected 
to local TCP port 5037 and listens to commands sent from ADB clients - all ADB clients use
 port 5037 to communicate with the ADB server.

The server then configures the connections to all running devices. Locate the emulators by 
scanning ports with odd numbers in the range of 5555 to 5585, the range used by the first 
16 emulators. When the server finds an ADB daemon, it configures a connection to that port.
 Each emulator uses a pair of following ports: an even-numbered port for console connections
 and an odd-numbered port for ADB connections.

Emulator 1, console: 5554
Emulator 1, ABD: 5555
Emulator 2, console: 5556
Emulator 2, ABD: 5557
and so on…

Once the server has configured connections to all devices, you can use the Android Debug 
Bridge commands to access those devices. Because the server manages connections to devices
 and handles the commands of several Android Debug Bridge clients, you can control any device 
from any client (or from a script).

Enable Android Debug Bridge debugging on your device

To use ADB with a USB-connected device, you must enable USB debugging in the device system
 settings, under Developer Options.

In Android 4.2 and later versions, the developer options screen is hidden by default. To make it 
visible, go to Settings> About phone and touch Compilation number seven times. Return to the 
previous screen to find the developer options below. On some devices, the Developer Options 
screen may be located or labeled differently.

ADB or Android Debug Bridge is a term that you have encountered quite frequently. Every time
 you connect your device to your computer by a cable, or if you browse through the 'Developer
 Options', you will find the term Android Debug Bridge or ADB for short, but what does it mean?
 And what is its purpose? It's a versatile tool that helps your Android device work the way it is, 
for more detailed information, you can visit Android training in Chandigarh.