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.
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