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This article shows you the Android development and debugging tool ADB commands and installation example analysis, the content is concise and easy to understand, absolutely can make your eyes bright, through the detailed introduction of this article, I hope you can get something.

A brief introduction to ADB

Abbreviation: ADB

English full name: Android Debug Brige

English full name: Android debug bridge

Purpose: a tool for communicating with Android devices

Second, install ADB

Adb is included in the Android SDK platform tools package. You can download this package using SDK Manager, which installs it under android_sdk/platform-tools/.

Or, if you need a separate Android SDK platform tool package, you can click here to download it.

III. Environmental variables

For different configurations under Windows, Mac and Linux, you can search Baidu or Google according to the corresponding platform. This article is limited to space.

4. Connect the real machine

1. Enable developer options

Press the version number 7 times continuously (Settings > about Mobile phone > version number)

2. Enable USB debugging

Developer options > USB debugging

3. Enable file transfer

Change USB charging mode to file transfer

4. RSA key authorization for mobile phone

A dialog box pops up in the device, which must be manually determined to execute USB debugging and other adb commands

5. Check the ADB version with common commands

Adb version

Help information (important)

Adb-help

Or

Adb help

Or

Adb

The help information of ADB is very comprehensive. Learn to view the help information of command-line tools and get twice the result with half the effort.

Open the ADB server

Adb start-server

Close the ADB server

Adb kill-server

Check the equipment connection

Brief information: adb devices

Details: adb devices-l

Install App

General installation: adb install xxx.apk

Reinstall, keep data intact (overwrite installation): adb install-r xxx.apk

Allow debug package installation: adb install-t xxx.apk

Authorize runtime permissions for AndroidManifest.xml files and install: adb install-g xxx.apk

Push multiple apk to the device and install as one package: adb install-multiple xxx1.apk xxx2.apk

Uninstall App

Normal uninstall: adb uninstall com.xxx.package_name

Keep data unloaded: adb uninstall-k com.xxx.package_name

Push file

Push from the machine to the Android device: adb push local remote

Local represents the path to the native file

Remote represents the path of the Android device

Pull file

Pull from the Android device to the native: adb pull remote local

Remote represents the path to the file or directory of the Android device

Local represents the path to a native file or directory

View the log

Adb logcat

Advanced skills. Specify 1 or n of multiple Devic

The adb devices command or adb devices-l gets the serial numbers of all devices

1. Adb-s serial number command. For example: adb-s dasdfew123 install xxx.apk

Or

1. ANDROID_SERIAL environment variable, which can specify the serial number of a single device.

2. ANDROID_SERIAL environment variable, which can specify the serial numbers of n devices with a comma "," as the delimiter

When the serial number is not specified with-s, adb reads the value of the ANDROID_SERIAL environment variable

Using both the-s and ANDROID_SERIAL environment variables,-s overrides the value of the ANDROID_SERIAL environment variable

WLAN connection

Premise: the phone and PC are on the same local area network (under the same WLAN)

Principle: the adb server on PC establishes a TCP connection with the adbd process on the Android device

How do I establish a connection?

1. First connect the phone to PC through USB

Adb tcpip 5555

After running, the adbd process on the Android device will start listening on port 5555 (in the Listener state)

2. Unplug the phone from the USB connection

Adb connect

After running, the adb server on PC establishes a TCP connection with the adbd process on the Android device (listening on port 5555)

How do I disconnect the WLAN?

Adb disconnect

How do I switch a WLAN connection to a USB connection for an Android device?

Adb usb

Bluetooth connection

...... For the time being

Port forwarding

…… For the time being

Advanced Unix command line tools (Android is based on the Linux kernel) to view the commands available to Android devices (important)

Adb shell ls / system/bin

Enter the device shell

Adb shell

Execute any available command

(all commands listed in adb shell ls / system/bin can be used)

Top

Ps

Dumpsys

Am

Input

Wait, wait, wait... All kinds of orders. to be continued

8. Frequently used Unix command line tools

View process status: ps

View cpu status: top

System service: dumpsys

9. The principle of ADB adopts client / server architecture (Cramp S architecture), which consists of three processes

1. ADB client process

Run on PC, used to send commands, for the CLI client, start on the command line, the command runs to an end, and the process ends

2. ADB server process

It runs on PC and is started by the ADB client. It is responsible for communicating with the adbd process on the Android device and the ADB client process on the PC. The ADB client on the PC communicates with the adbd process on the Android device and is forwarded by the ADB server process on the PC.

3. Adbd process

Runs on Android devices and is responsible for communicating with ADB server processes on PC

Process communication mode

1. ADB client and ADB server

Both the ADB client and the ADB server run on PC and use TCP to establish a connection, namely Network Socket.

2. ADB server on PC and adbd process on Android device

Use USB cable to establish a connection (default)

Or

Using TCP to establish a connection (wireless adb)

Process life cycle

1. The life cycle of the ADB client process

Entering any adb command on the command line will create an ADB client process. When the client command execution ends, the adb client process will be destroyed naturally.

2. The life cycle of the ADB server process

Called by any client (such as adb command line, Android Studio, etc.), resident in PC memory as a daemon

3. The life cycle of the adbd process

The init process reads the init.rc file (which contains the configuration information of the adbd process), and then fork out the adbd process. The adbd process is created immediately after the Android system is started. It has been running in the memory of the Android as a daemon for the Android device.

5037 port

1. When starting any ADB client (Android Studio, command line tools, etc.), the ADB client checks whether the ADB server process is running

2. If the ADB server is not running, the ADB client executes the code that starts an ADB server process

3. After the ADB server starts, it will bind on the local port 5037 of PC (TCP port) to listen for commands issued by all ADB clients. All ADB clients communicate with ADB servers through TCP port 5037.

The above is the sample analysis of the ADB command and installation of the Android development and debugging tool. Have you learned the knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

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