Reading file types is easy with Okio

An example of getting the MediaType from an image file.

Two OkHttp Tips for Loading Images

Use only relevant client customizations and warm the HTTP response cache.

A simple implementation of onMeasure

Implementing a SquareFrameLayout.

Covariant return types for View’s onSaveInstanceState

When implementing custom Views that use the onSaveInstanceState hook, consider exposing the final Parcelable implementation.