Install android apk using adb with all permissions granted by default

adb install -g myAndroidApplication.apk

Clear android Application data using shell command

adb shell pm clear com.app.packageName

Reset all granted permissions to a android package

adb shell pm reset-permissions -p com.app.packageName

Get environment variables passed to android/linux process

adb shell cat /proc/238/environ | sed -e "s/\x0/\n/g"

Set/Get global android device settings using command line

adb shell settings put global bluetooth_disabled_profiles 6

adb shell settings put global device_provisioned 1

adb shell settings list global

adb shell settings list system

adb shell settings list secure

adb shell settings get global bluetooth_on

How to get print from android makefile

Add below line to get print from android makefile
$(info "I want this print")

To grant all permission to android app

To grant all permissions to app, use -g as argument while installing with adb

 adb install -g myapp.apk 

Use command line to get screen tap in Android

If you want to tap on android device screen and touch is not working then you can use following command to tap screen. Suppose you want to tap 300, 500 location on screen then use following command

adb shell input tap 300 500

Dial/Accept phone call using command line in Android

To dial phone number using service call

adb shell service call phone 2 s16 "+123456789"

To dial call using activity manager

adb shell am start -a android.intent.action.CALL -d tel:123456789

To accept incomming call

adb shell input keyevent 5

To disconnect call

adb shell input keyevent 6

How to extract files from android system.img

To extract files from android system.img on linux PC, use below steps
1) simg2img system.img system_ext4.img
2) mkdir temp
3) sudo mount -o rw,loop system_ext4.img temp
Now you can browse or copy files from temp folder.

Get google android phone factory images

https://developers.google.com/android/nexus/images