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scripting – Detect when Android emulator is fully booted

Posted by: admin April 23, 2020 Leave a comment


I want to create a script where I start an emulator and after the system is fully booted, I want to install an .apk.

How can I know when the emulator is fully booted so I can run the install command? Here http://developer.android.com/guide/developing/tools/adb.html it is said that adb wait-for-device install <app>.apk is not correct.

So how can I achieve this? Is it possible? Is my only option to sleep for a few minutes until I can be sure that the emulator is started?

How to&Answers:

adb shell getprop init.svc.bootanim

This will tell you whether or not the boot animation is running. It’s what we use on our headless build server to check if the emulator is up. The sys.boot_completed from dac2009 is what lead me to find that flag. We use init.svc.bootanim instead because boot_completed has a tendency of triggering too early.


while [ "`adb shell getprop sys.boot_completed | tr -d '\r' `" != "1" ] ; do sleep 1; done

This code gets the information from sys.boot_completed if the system boot is complete, removes a newline and compares the resulting value to 1. If its unequal 1/ not booted completly/ it will just sleep 1 second and tries again.

Just put your adb install… after this line of code.


Im not sure if this works on all devices, but it works on the ones I have tested.

If you go into the shell, you can type getprop, and get a list of phone properties.
There should be one called “sys.boot_completed”.

If you type “getprop sys.boot_completed” it will respond “1” if the system is booted, and an empty string if the system is not booted.


Just run emulator with -delay-adb flag and then run adb wait-for-device. adb will exit when the emulator booted.


You can set a broadcast receiver which can notify that the device boot is complete



You may parse the stdout output of the emulator if you start it with “-logcat VERBOSE” and wait for a message which indicates that the emulator is booted.

I didn’t saw any good message right now in the output, but you may write an app which is listening for “android.intend.action.BOOT_COMPLETED” and writes something to the log.

Refer http://developer.android.com/guide/developing/tools/emulator.html for more info.