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square/okio

★ 9,004KotlinAudience · developerComplexity · 2/5Setup · easy

TLDR

A utility library from Square that simplifies reading and writing files, network sockets, and byte data in Android, Java, and Kotlin projects, filling gaps left by standard Java I/O tools.

Mindmap

mindmap
  root((repo))
    What it does
      File reading
      Stream writing
      Buffer management
    Tech stack
      Kotlin
      Java
      Android
    Use cases
      File operations
      Network IO
      Data transforms
    Audience
      Android devs
      Java devs
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Things people build with this

USE CASE 1

Replace verbose Java stream boilerplate with Okio's cleaner API for reading files or writing to a network socket in an Android app.

USE CASE 2

Transform data as it moves between sources and destinations using Okio's composable buffer and pipe abstractions.

Tech stack

KotlinJavaAndroid

Getting it running

Difficulty · easy Time to first run · 5min

In plain English

Okio is a library from Square that makes reading and writing data easier in Android, Java, and Kotlin projects. It was originally built as part of OkHttp, Square's widely used HTTP networking library for Android, and then extracted into its own project because the data-handling code was useful on its own. The library fills gaps left by the standard Java tools for working with streams, files, and byte data. It provides cleaner APIs for common operations like reading from a file, writing to a network socket, or transforming data as it moves between sources and destinations. The README for this project is brief and points to the project website for full documentation. Based on what is provided, this is a low-level utility library aimed at developers rather than end users.

Copy-paste prompts

Prompt 1
Show me how to use Okio's BufferedSource and BufferedSink to read a JSON file and write a modified version in a Kotlin Android app.
Prompt 2
How do I use Okio to pipe data from an HTTP response body to a file on disk without loading it all into memory at once?
Prompt 3
Help me add Okio as a Gradle dependency and replace a FileInputStream and BufferedReader with the Okio equivalent.
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