This snippet of a vector drawable will turn a bitmap drawable into a tile or repeatable pattern.

Monitor network connectivity, and show a SnackBar when the connection is lost.

Note: requires android.Manifest.permission.ACCESS_NETWORK_STATE in the manifest.

This recipe creates a “time ago” string from any timestamp, often used to display how long ago a comment was posted or a notification was received. We’re creating an extension method, so any Long timestamp can be converted like so: 12313131.timeAgo(arr) where arr is a list of labels. This list can be retrieved from a string-array in the strings.xml to make it localizable.

Add a file file_paths.xml to the resources directory res/xml/ in order to grant access to the correct folders:

Detect when the keyboard is visible and when not.

Common type converters for the Room library.

Start the App Settings Activity so that the user can change settings related to the application, such as permissions.

Use LiveData to determine the status of any permission (in the sample code below: the location permission). If the user grants the permission at any point, then we will get notified.

The snippets below can lock access to the app whenever the user leaves the app and comes back, with an optional timeout.

All the methods below need the location permission:

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.

Tiny snippet for reducing compatibility clutter.

A class that is using the “normal” shared preferences for any device with an sdk < M and the EncryptedSharedPreferences for M and above.

A replacement for the mediator LiveData for triggering LiveData transformations.