Automation issue with MOS and UiAutomator - android-uiautomator

Question

I am using the following command in APK to invoke UiAutomator based test scripts:
proc = java.lang.Runtime.getRuntime().exec("uiautomator runtest Library.jar -c com.uia.example.my.Library");
It is working fine till LOS.
But in MOS, I am getting the following error:
Unable to unlink
/data/local/tmp/dalvik-cache/arm64/sdcard#data#Library.jar#classes.dex:
Permission denied
Please provide solution for this issue.
Note: I need to run scripts in release binary. So rooting is not possible.

Answer 1

Use Android Testing Support Library and create a test case extending InstrumentationTestCase as explained in Testing UI for Multiple Apps.
Then run your tests using
$ ./gradlew connectedCheck

Answer 2

The problem is due to no write permission in /data/local/tmp/ where you placed your Library.jar file. Write permission is required to extract dex from the Jar.
May be OEMs could disable rooting and remove write permission to /data/local/tmp and that may the reason for your issue in production/release builds ..
If you use uiautomator commands like : uiautomator runtest Library.jar ....
uiautomator will search for Library.jar by default in /data/local/tmp .
You can check uiautomator shell script present in /system/bin.
export run_base=/data/local/tmp ==> Classpath for searching the dex files.
One solution could be to place Library.jar and modified uiautomator script in your application folder (data/data//files).
you have to modify run_base with your application data folder path.
You can bundle the uiautomator script and jar following the instrcutions in below link :
http://gimite.net/en/index.php?Run%20native%20executable%20in%20Android%20App
Hope it helps ... Please update about your results.