adb is a tool communicate with a virtual or physical Android device. It can be also used to simulate user input. A few useful commands:
Input
Type text:
adb shell input text "Your%sText"
(%s means space)
Type a special key:
adb shell input keyevent $KEY_EVENT_CODE
(KEY_EVENT_CODEs are defined here)
Files
Upload a file to device:
adb push $LOCAL_FILE /sdcard/$TARGET_FILE
Install and Run Apps
Install app via APK:
adb install app/build/outputs/apk/debug/app-debug.apk
Start a specific activity:
adb shell am start -a android.intent.action.MAIN -n at.xa1.your.applicationid/at.xa1.your.LaunchActivity
Open a link:
adb shell am start -a android.intent.action.VIEW -d 'https://xa1.at'
(Useful for testing deeplinks)
Terminal
Change to root:
adb shell
su
Logcat
Print logcat live in terminal:
adb logcat
…with filter:
adb logcat | grep ">>>"
Clear on device:
adb logcat -c