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Screen recording of Android UI tests with Script Steps
Screen recording of Android UI tests with Script Steps
Updated over 4 months ago

Issue

You want to run your UI test specific to your Android app and have the whole process screen recorded using one Bitrise Workflow.

Possible solutions

Here is an example workflow containing the steps we will use in this guide:

  1. Add the AVD Manager Step at the beginning of your Workflow to create and run an Android Virtual Device.

  2. Add the Wait for Android Emulator Step after the AVD Manager Step. This Step makes sure that the Android emulator has finished booting before the screen recording would start.

  3. Add a Script Step after the Wait for Android Emulator Step. (We’re renaming this Script Step as Start screen recording Step.)

  4. Insert the following commands to the Script content input field:

    $ANDROID_HOME/platform-tools/adb shell "screenrecord /sdcard/video.mp4 --verbose" &> $BITRISE_DEPLOY_DIR/logs.txt & disown 
$ANDROID_HOME/platform-tools/adb shell "screencap -p /sdcard/screen.png" &> $BITRISE_DEPLOY_DIR/logs.txt & disown

    The Start screen recording Step:

    • Starts screen recording before UI testing.

    • Captures a screenshot of the emulator screen BEFORE the UI test would start.

  5. Add another Script Step after the Start screen recording Step. (We will call it Run UI test Step.)

    • Add your script (for example, Maven, npm or Appium tests) in the Script content input field to call and run your UI test.

  6. Insert the third Script Step (Stop Screen recording & get file from emulator) after the Run UI tests Step.

  7. Add the following script to the Script content input field.

    $ANDROID_HOME/platform-tools/adb shell "killall -INT screenrecord"
sleep 10
$ANDROID_HOME/platform-tools/adb pull /sdcard/video.mp4 $BITRISE_DEPLOY_DIR/video.mp4
adb pull /sdcard/screen.png $BITRISE_DEPLOY_DIR/
      
$ANDROID_HOME/platform-tools/adb shell "screencap -p /sdcard/screen2.png" &> $BITRISE_DEPLOY_DIR/logs.txt & disown
      
adb pull /sdcard/screen2.png $BITRISE_DEPLOY_DIR/

    Stop Screen recording & get file from emulator Step does the following:

    • Stops the screen recording.

    • Gets the screen recording.

    • Gets those Emulator screenshots that had been taken before UI tests started.

    • Gets the final screenshot of the Emulator screen.

    • Places these files in the BITRISE_DEPLOY_DIR path.

  8. Add the Deploy to Bitrise.io - Apps, Logs, Artifacts Step to your workflow to export all files stored in the BITRISE_DEPLOY_DIR directory to Artifacts. You can check these files at the Artifacts tab of your Build’s page. (Note that if you did not place the files in this directory, they will not be deployed to the Artifacts tab of your Build’s page.)

If your build fails due to No such process (error message below) or an Enemphasisr failed (err=-38) error in your build log, most likely the screen resolution of the screen recording and the device does not match.

/opt/android-sdk-linux/platform-tools/adb shell 'killall -INT screenrecord' killall: screenrecord: No such process

Here is what to check:

  • Check if you have the right resolution set in the Resolution field of the AVD Manager Step.

  • If you’re NOT using the AVD Manager Step to start the emulator (and use Script Step instead), then you can fix the screen size in the Script content field of the Start screen recording Step by specifying the width and height of the screen: --size <WIDTHxHEIGHT>.

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