# Using Android Debug Bridge with Collect¶

Android Debug Bridge is a tool that provides command-line access to a USB-connected Android device. It can be used to move files between the device and your computer, install applications, and take screenshots and videos. When connected to a device that has ODK Collect installed, it can be used to push blank form definitions and pull completed forms.

## Installing and setting up ADB¶

### Android Studio¶

The easiest and most well-supported way to install ADB is to install Android Studio, which includes ADB. After installing, you'll need to enable USB Debugging.

You can also install ADB without Android studio. This is not well supported, though, and should only be done if you cannot install Android Studio on your computer.

Forms are stored on the device in /sdcard/odk/forms/.





### Taking screenshots¶

$adb exec-out screencap /sdcard/image-name.png  To pull the saved image locally: $ adb pull /sdcard/image-name.png


Note

ODK Docs contributors can use the screenshot utility script, which wraps the adb commands and assists with saving the images to the correct location and inserting appropriate markup in the documentation source.

### Recording video¶

$adb shell screenrecord /sdcard/video-name.mp4  When you hit Enter, the video starts recording immediately. To stop the recording, press CTRL-C. If you don't interrupt the recording, it will stop after three minutes. To pull the video locally: $ adb pull /sdcard/video-name.png


### Capturing logs for debugging¶

#### Capturing in-progress logs with logcat¶

If you are experiencing crashes or other serious glitches, and you can reproduce the bug, use adb logcat to capture log events during the crash.

1. Before reproducing the bug, begin piping logs to a file:

adb logcat > logfile.txt


This will write all logged errors to your local file logfile.txt as they occur.

2. Reproduce the bug or crash event.

3. Type CTRL-C to stop logging.

You can then upload the logfile.txt file to a Collect issue on GitHub or post in the ODK Forum.

#### Pull a bug report¶

If more in-depth information is needed, you can pull a complete bug report from the device.

adb bugreport


This copies a ZIP file locally containing all system messages, error logs, and diagnostic output, along with information about the device's hardware, firmware, and operating system.