What is ADB?

ADB is a client-server program, and there are three components that make up the entire process. ADB stands for “Android Debug Bridge,” and it is a command line tool that is used to communicate with a smartphone, tablet, smartwatch, set-top box, or any other device that can run the Android operating system (even an emulator).

• Client, the computer you have connected to your Android device.
• Daemon (also known as adbd), and this is a service that is currently running on both the computer as well as the Android device and allows the latter to accept and execute commands.
• Server, a piece of software that actually manages the communication between the client and the daemon. It’s the server that is running as a background process on your computer that sends those command to the daemon.

How to install ADB?

ADB Command

adb devices

1
2
3
$ adb devices
List of devices attached
DU2SSE1467010378    device

adb shell

1
2
3
4
5
6
7
8
// use adb shell to interact with devices(Daemon)
$ adb shell
kona:/ # 

// use `exit` to go back the client
$ adb shell
kona:/ # exit
$

adb install/uninstall

1
2
3
4
5
6
7
8
9
// assign the path of apk file when installing
$ adb install ~/Downloads/mobileqq_android.apk
[100%] /data/local/tmp/mobileqq_android.apk
    pkg: /data/local/tmp/mobileqq_android.apk
Success

// assign the name of apk package when uninstalling
$ adb uninstall com.tencent.mobileqq
Success

adb shell dumpsys

Dump the system info from devices/daemon, could get following info by using ‘adb shell dumpsys xxx’

• activiy: application info
• alarm: alarm info
• cpuinfo: cpu usage info
• meminfo: memory usage info
• diskstats: stats of disk usage
• window: current window info
• package: package info

adb start/kill server

Restart the server

• adb kill-server
• adb start-server

adb pull/push

1
2
3
4
5
6
7
// push the _file(local) to device path
$ adb push ~/tester /data/local/tmp/
[100%] /data/local/tmp/tester

// pull the file(devices) to local path
$ adb pull /data/local/tmp/tester ~/
[100%] /data/local/tmp/tester

adb logcat

• adb logcat: print the log
• adb logcat -c: clear the log buffer in devices
• adb logcat _KEYWORD*: print the KEYWORD log only
• adb logcat -f _FILENAME: cat the log to specifc file
• adb logcat | grep -e <string_name>: to grep the keyword in linux bash
• adb logcat | select-string <string_name>: to grep the keyword in windows powershell
• adb logcat -v time >.\\logcat.log: to save the log with timestamp

adb logcat Debug fatal error

• adb logcat *:F: Print all fatal logs
• adb logcat *:F <tag1>:E <tag2>: Print all fatal logs + error logs for + all logs for

Others

• adb root: run as root
• adb remount: remount the devices/daemon
• adb shell setenforce 0: turn off selinux firewall in shell domain
• adb shell su 0 setenforce 0: run the setenforce in su domain
• adb shell getenforce: get the status of SELinux firewall

where does image saves

• default android raw image: /data/vendor/camera
• default android jpeg /sdcard/DCIM/Camera

setproperty， 每次都需要额外运行adb root

• adb shell getprop， 获取本地设定

• adb shell getprop

  select-string “xxx”, output the specific item

• adb shell setprop persist.vendor.camera.MIAWBlibName ""

• adb shell setprop persist.vendor.camera.offlineImageDumpOnly 1: 只有拍照时才会dump图像
• adb shell setprop persist.vendor.camera.rawDump 1: Dump raw图像
• adb shell setprop persist.vendor.camera.mfnrDump 1: Dump多帧图像

Reference

• More Effective ADB Logcat

• Previous
  Dynamic and Static Library
• Next
  SELinux