This application serves as an example of how to use the Google Drive API to pull down your app's files as well as update them in the background using Work Manager API's.

This serves as a starting point to allow you to easily store data in Drive while being able to recover the files if the profile on the Chrome OS Device is deleted or removed due to lack of memory.

• Creates text files in the user's My Drive folder
• Edits file contents and metadata and saves them to Drive
• Queries the REST API for all files visible to the app using the Drive Client Library.
• Updates/Creates text files in the background using Work Manager

• Main Activity handles the authorization of the user and the creation of the Google Drive service with this authorization.
• FileViewModel handles most of the conversation between the buttons in the activity and making the calls to the Drive API. This is also the launch of the coroutines where we are making these calls.
• DriveExtensions.kt enhances the Drive API to handle network calls.
• The remaining class enable background processing with WorkManager. We are using a DelegatingWorkFactory to be ableto create our workers with the API client that we need.

• Using WorkManager to save things in the background is great, but there are many ways that the user could stop this from occurring. On Chrome OS, logging out of the device or closing the lid will turn off the Android container and in turn will stop anything running in the background.

As a disclaimer: this sample handles this by pushing to the background if you choose to use that option, and it will be stopped if the Android container is stopped

• One other thing to note is that we are not setting any constraints on our Work Manager jobs, due to this being a Chrome OS based sample, the same network and battery constraints don't necessarily apply the same due to Chrome OS devices having larger batteries and not LTE enabled. Take note of this if you are also building apps for both Chrome OS devices and phones.

1. Install the Android SDK.
2. Download and configure the Google Play services SDK.
3. Create a Google API Console project and enable the Drive API library.
4. Register an OAuth 2.0 client for the package com.google.android.gms.drive.sample.driveapimigration with your own debug keys.
5. Add the ../auth/drive.file scope to the OAuth consent screen in the API Console.

See full instructions in the Getting Started guide.

Find API Documentation and references here

If you've found an error in this sample, please file an issue

Patches are encouraged, and may be submitted by forking this project and submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.