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okio
shaunkawano
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okio
• History of okio
• Basics of okio
• etc
No sample code or project; all I know from
research of okio.
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History of okio
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History of okio at glance
1. Square team made “OkHttp”; HTTP + SPDY
supported client for Android.
2. Processing HTTP using java.io and java.nio
inside OkHttp was painful.
3. Square team implemented efficient way of
processing data for OkHttp, and exported it as
another library, called “okio”.
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History of okio at glance
1. Square team made “OkHttp”; HTTP + SPDY
supported client for Android.
2. Processing HTTP using java.io and java.nio
inside OkHttp was painful.
3. Square team implemented efficient way of
processing data for OkHttp, and exported it as
another library, called “okio”.
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java.io and java.nio
• InputStream is fundamentally for reading data
• Decorators
• DataInputStream for primitive values
• BufferedInputStream / BufferedReader for buffering
• InputStreamReader for strings
• When processing, fixed-sized Byte[] is passed and created
• Hard to program efficiently..! so okie was made.
https://www.youtube.com/watch?v=WvyScM_S88c
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Now okio is used in many Square
libraries:
• OkHttp
• Retrofit
• Moshi
• Wire
and maybe more?
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Basics of okio
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Basics of okio
• 2014-04-08 Initial Public Release (0.5.0)
• Latest Version: 1.9.0
• Imported from OkHttp
• “Making it much easier to access, store, and
process your data.”
• Complement of java.io and java.nio
https://github.com/square/okio
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Basics of okio
• Naming Convention: java.io, java.nio => okio.
• ByteString and Buffer
ByteString: Binary data as a value
Buffer: Mutable sequence of bytes
• Source and Sink
Source: InputStream
Sink: OutputStream
https://github.com/square/okio
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ByteString
ByteString byteString = ByteString.of(bytes);
String data = byteString.utf8();
byteString.base64();
byteString.hex();
byteString.md5();
byteString.sha1();
byteString.sha256();
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Extra
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Extra
• What does “Ok” stand for?
• blackhole
https://github.com/square/okio
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What does “Ok” stand
for?
http://fragmentedpodcast.com/episodes/46/
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What does “Ok” stand
for?
OkHttp
okio
http://fragmentedpodcast.com/episodes/46/
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“Ok” implies
Response 200 OK
http://fragmentedpodcast.com/episodes/46/
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Response 200 OK
http://fragmentedpodcast.com/episodes/46/
D/OkHttp: <-- 200 OK
“Ok” implies
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blackhole
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https://github.com/square/okio/issues/229
blackhole
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blackhole
• Added 2 weeks ago; Available from next ver.
https://github.com/square/okio/issues/229
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Maybe okio is helpful
for you!
Maybe replacing java.io, java.nio
classes from your code?
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okio
shaunkawano
fin.