Adds several features over the regular AndroidJUnitRunner:

Copying and pasting from and to the system clipboard. Assuming text and/or html content.

If you’re going to add a custom camera to your app, use these snippets to do it right. This recipe uses the Camera2 APIs, and hides all the weird code required for setting up a viewfinder and taking pictures.

The implementation of the Google Vision api is not that hard, but there are a few fixes you’ll need to make your app production ready. Most importantly: the default implementation does not support autofocus which makes it very hard to scan a barcode.

A LiveData class that has null value.

For haptic feedback on button touches:

Simple snippet for showing a notification. Tweak where needed.

Gets the MD5, SHA1 and SHA256 of a keystore. You’ll need this for many signin solutions, such as Google SignIn, Facebook, Twitter, etc.

This recipe is outdated! We’ll keep it for now, because it might be useful when maintaining old apps, but the new prefered way is to use a FragmentContainerView instead.

Handle session expirations and 401 error codes. The following code will be activated if the API responds with a 401 (no authentication). If there’s a token that should be renewed, we first renew the token and if this is successful we try the original request again.

With this snippet you can easily and quickly mock an API during developmentby placing JSON files in your res/raw/ folder. This comes in handy when the actual API does not exist yet.

A very complete recipe that implements a RecyclerView that pulls in paginated data, using Retrofit, LiveData. It includes example models, adapter, viewholders, and a viewholder for displaying the network state in case of an error.

Global error handling for REST requests.

To pair Wear running on an emulator with a physical phone, run this command targeting the emulator:

Use the following commands to install your app as a system app on an emulator (or rooted device).