Appium hangs when taking a screenshot. (Android)

Issues/Bugs
4

I know this is a slightly old topic, but with the Appium Java client 3.2.0 I am facing this issue on a real device.
I know this used to work with the older Java client 3.1.0.

Unfortunately I need the newer client for the AppiumDriverLocalService feature that was added in.

Here’s the line of code where the hang happens. I know because the previous log.debug line gets printed.

	log.debug(filePath);
	File file  = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);

And here is the Appium Server Log:

2015-11-26 09:20:03:085 - info: <-- POST /wd/hub/session/93df24a9-1b33-49c8-aea1-b3b768f21d97/element 200 1210.866 ms - 87 {"status":0,"value":{"ELEMENT":"1"},"sessionId":"93df24a9-1b33-49c8-aea1-b3b768f21d97"}
2015-11-26 09:20:03:101 - info: --> GET /wd/hub/session/93df24a9-1b33-49c8-aea1-b3b768f21d97/screenshot {}
2015-11-26 09:20:03:103 - debug: executing cmd: D:\vish\adt-bundle\sdk\platform-tools\adb.exe -s TA64303N7W shell "/system/bin/rm /data/local/tmp/screenshot.png; /system/bin/screencap -p /data/local/tmp/screenshot.png "

Further debugging: look at /data/local/tmp

I took a look at the /data/local/tmp device folder. Here are the contents, their permissions and timestamps:

$ adb shell ls -l /data/local/tmp
-rw-rw-rw- shell    shell    20456741 2015-11-25 21:41 0978df74a3eeb9a231b2e0cb5a1f7e73.apk
-rw-rw-rw- shell    shell       48797 2015-10-10 03:23 AppiumBootstrap.jar
-rw-rw-rw- shell    shell        2554 2015-07-25 23:40 UIAutomatorTest.jar
drwxrwxrwx shell    shell             2015-07-25 23:36 dalvik-cache
-rw------- root     root         8529 2015-11-18 15:38 dump.xml
drwx------ shell    shell             2015-08-07 16:37 local
drwxrwxrwx shell    shell             2015-10-14 15:33 mobizen
-rw-rw-r-- root     root       379501 2015-11-18 15:38 screenshot.png
-rw-rw-rw- shell    shell       53503 2015-11-26 14:49 strings.json
-rw------- shell    shell       13965 2015-11-19 14:20 uidump.xml

As you can see, there is a file screenshot.png from about a week ago. (presumably captured by the old Appium Java client).

Next: try deleting manually using adb shell

Next - I tried deleting this file using the exact adb shell command used by Appium. Here’s the output:

vish@freeman /cygdrive/d/vish/ma-app-verification-android/appium-projects/AppiumAndroid
$ adb -s TA64303N7W shell "/system/bin/rm /data/local/tmp/screenshot.png"
override rw-rw-r-- root:root for '/data/local/tmp/screenshot.png'?

(drum-roll)

The prompt seen above is what is causing Appium to hang.

Luckily, my phone is rooted, so I was able to remove the offending screenshot manually as root:

vish@freeman /cygdrive/d/vish/ma-app-verification-android/appium-projects/AppiumAndroid
$ adb root

vish@freeman /cygdrive/d/vish/ma-app-verification-android/appium-projects/AppiumAndroid
$ adb shell rm /data/local/tmp/screenshot.png
1 Like