#technology #os #mobile

Android

Android is an open source operating system based off of Linux that runs within the ARM architecture; the primary use-case is within the mobile/tablet eco-system but it has been expanding into server, desktop and embedables.

by Anon
3 min read

Information

Join the global Android community of millions of users and developers who collaborate to improve the open-source mobile operating system, giving you endless possibilities to customize your device. Unleash your creativity and make your smartphone, tablet, or smartwatch truly your own with the endless array of apps and features available on Android, tailored to fit your unique needs and preferences. Our job at KBVE will be to provide you with everything you need to deploy your own Android application on almost any device!

Introduction

Everything you need to get started with Android!

Cheatsheet

The ADB cheatsheet provides a general list of basic commands for Android operating system and applications. Please note that certain commands require the device to be rooted, furthermore certain Android versions may require a tweak to the commands.

System Information

Errors

Videos

Notes

Notes for Android MDX.

Log

  • Need more information and data for the Android MDX.
  • Add Namespace into the Android MDx.

Journal

2023-06-20

Just added the details mdx to the notes!

2023-04-15

Testing the tabs for Android MDX

Android Device Commands

Android Device Commands

Device Commands

Android ADB Device commands are commands that you can use to control the Android device over USB from a computer. You can use them to list all devices, restart server and reboot!

  • adb devices - List all connected devices.

    • adb devices -l - Query additional information from devices.
    • adb get-state - Information on the device state.
    • adb get-serialno - Query the device serial number.

  • adb root - Launch module adbd with root permission.

    • Error 1: adbd cannot run as root in production builds
      • Resolution:

  • adb start-server - Start the adb server.

  • adb kill-server - Terminate the adb server.

  • adb reboot - Restart the current device.

  • adb help - Display additional information.

Shell

Warning: Shell commands can brick your operating system, so make sure to double check them before running.

ADB shell is a command-line interface that you can use to access the shell and run various commands on your Android device. You can use ADB shell commands to perform actions such as changing the resolution of your device display, uninstalling bloatware or system apps, enabling and disabling features, modifying the system files, ect..

Remember to keep a backup of the commands that you run via shell, I recommend creating a log.txt file and output all the commands to that file.

  • adb shell - Launch the shell terminal for the device.
  • adb -s $deviceString $deviceCommand - Send the $deviceCommand to a specific device named $deviceString
  • adb shell pwd - Command to list current directory.
  • adb shell ls - Command to list all the directory contents of the device.
    • adb shell ls -s - Additional size information.
    • adb shell ls -R - Recursion of the folders.
  • adb shell netstat - Query the TCP information
  • adb shell dumpsys - An android tool that dumps information related to system services.
    • adb shell dumpsys iphonesybinfo - Query the IMEI information.
    • adb shell dumpsys battery - Query battery information.
      • adb shell dumpsys battery set level $v - Device battery level from 0 to 100.
      • adb shell dumpsys battery reset - Reset the device battery.
    • adb shell dumpsys activity $package - Query activity of package.
  • adb shell pm list features - Query device features.
  • adb shell service list - Query device services.
  • adb shell wm - ◈Null
    • adb shell wm size - Current device screen resolution.
      • adb shell wm size $WxH - Change device screen resolution.
      • adb shell wm size reset - Reset device screen resolution.
    • adb shell wm density - ◈Null
      • adb shell wm density reset - Reset device density.
  • adb shell ps - Query process status on the device.
  • exit - To exit ADB.

Key Events

Android Key Events - A quick breakdown for each event and how the operating system handles them.

Generic Android Keyevents:

  • adb shell input keyevent

    • adb shell input keyevent 0 - Keycode 0
    • adb shell input keyevent 1 - Soft Left
    • adb shell input keyevent 2 - Soft Right
    • adb shell input keyevent 3 - Home Button Event.
    • adb shell input keyevent 4 - Back Button Event.
    • adb shell input keyevent 5 - Call Event.
    • adb shell input keyevent 6 - End Call / Hangup Event.
    • Events 7 to 18 are generic cell phone events.
      • adb shell input keyevent 7 - Keycode 0
      • adb shell input keyevent 8 - Keycode 1 aka Number 1
      • adb shell input keyevent 9 - Keycode 2 aka Number 2
      • adb shell input keyevent 10 - Keycode 3 aka Number 3
      • adb shell input keyevent 11 - Keycode 4 aka Number 4
      • adb shell input keyevent 12 - Keycode 5 aka Number 5
      • adb shell input keyevent 13 - Keycode 6 aka Number 6
      • adb shell input keyevent 14 - Keycode 7 aka Number 7
      • adb shell input keyevent 15 - Keycode 8 aka Number 8
      • adb shell input keyevent 16 - Keycode 9 aka Number 9
      • adb shell input keyevent 17 - STAR Key
      • adb shell input keyevent 18 - Pound Key

  • Koltin: open class KeyEvent: InputEvent, Parcelable

  • Java: pulibc class KeyEvent extends InputEvent implements Parcelable