How to accept debugging dialog for Android Emulator via command line

Question

I'm writing an automated emulator script that will create and launch an Android emulator so I can run my UI tests from any machine and guarantee that it'll run on a device.

My current script creates an android-27;google_apis;x86 device which works fine, but lacks google services so the maps in my app do not show.

I tried creating an emulator using google_apis_playstore, but when the device boots, it prompts with an ADB debugging prompt. Normally tapping this would be fine, but Im expecting to be able to run this on a headless server and wont always be able to.

Is there anyway to create the emulator that will have google apis + maps without having to accept an ADB dialog?

Here's my current shell script

#!/bin/sh
# Run this script in root project dir

# Kill existing emulator
$ANDROID_HOME/platform-tools/adb devices | grep emulator | cut -f1 | while read line; do $ANDROID_HOME/platform-tools/adb -s $line emu kill; done

# Install system image
$ANDROID_HOME/tools/bin/sdkmanager "system-images;android-27;google_apis;x86"
yes | $ANDROID_HOME/tools/bin/sdkmanager --licenses

# Create emulator
echo "no" | $ANDROID_HOME/tools/bin/avdmanager create avd -f \
    -n "tester" \
    -k 'system-images;android-27;google_apis;x86' \
    -b x86 \
    -d "Nexus 5X"

# Start emulator
$ANDROID_HOME/emulator/emulator -avd tester &

# Wait for emulator to start
$ANDROID_HOME/platform-tools/adb wait-for-device shell input keyevent 82
while [ "`$ANDROID_HOME/platform-tools/adb shell getprop sys.boot_completed | tr -d '\r' `" != "1" ] ; do sleep 1; done
sleep 5;

I get an error when using google_apis_playstore because it can't adb in to check if the emulator has started because of the dialog.

error: device unauthorized.
This adb server's $ADB_VENDOR_KEYS is not set
Try 'adb kill-server' if that seems wrong.
Otherwise check for a confirmation dialog on your device.

Seems silly that you would need to accept debugging permissions for an emulator?

Edit: I have submitted this as a bug https://issuetracker.google.com/issues/128271326

This is likely just an operation order issue. Try to adb shell input keyevent after emulator booted. Similarly sdkmanager --licenses should be accepted before downloading. — Sergii Pechenizkyi
– Sergii Pechenizkyi, Commented Mar 11, 2019 at 7:22
@SergiiPechenizkyi the issue is I cant do any ADB operations because the authorisation hasnt been granted to allow me to, that's the crux of my issue — ScruffyFox
– ScruffyFox, Commented Mar 11, 2019 at 10:33

Sergii Pechenizkyi · Accepted Answer · 2019-03-19 17:54:02Z

7

Unlike default or google_apis, google_apis_playstore is enforcing authentication. It means that both adb server on host and adb daemon at emulator should share same RSA adbkey for communication. Documentation is here: https://developer.android.com/studio/command-line/adb

Typically it works automatically. adb start-server command will create adbkey files and then emulator/emulator will copy them into image filesystem. But since it doesn't work in your case you would have to carefully verify where things got misconfigured:

Running adb keygen adbkey generates 2 files - adbkey and adbkey.pub
These 2 files needs to be copied to $HOME/.android folder (alternatively $ANDROID_VENDOR_KEYS) for adb server on your HOST
Same 2 files needs to be copied to $HOME/.android folder (alternatively $ANDROID_SDK_HOME/.android) for emulator/emulator on your GUEST. Typically HOST==GUEST but if you are running adb on desktop and emulator inside docker container they are different.
Filesystem for emulator is cached so remove any previously created images. They wouldn't have key copied over.
Optionally, it is suggested here https://developer.android.com/studio/command-line/adb#notlisted to call adb start-server explicitly before issuing any adb commands

$ adb kill-server
$ emulator -avd Nexus_6_API_25 -port 5557
$ adb start-server
$ adb devices

List of devices attached
emulator-5557 device

edited Mar 19, 2019 at 17:54

answered Mar 16, 2019 at 12:48

Sergii Pechenizkyi

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1 Comment

ScruffyFox Over a year ago

I posted a bug report to google and they responded with a fix that works, and it looks like its basically what you've posted so i'll accept as the answer. Thanks for the help! issuetracker.google.com/issues/128271326

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