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AutoValue
shaunkawano
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Article.class
Amazingly Simple POJO
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We want Article to be
Value-Typed
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We want Article to be
Value-Typed
(immutable, null-safe)
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1. Finalize class and fields
2. Add constructor
3. Add getters
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Is only referential equality
safe enough?
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Override equals()
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Override hashCode()
(if use Article as key in set or
maps)
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toString() is nice for
debugging!
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Parcelable anyone?
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Before-After
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~100 Lines
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Add new field?
Remove field?
Rename field?
Write/Rewrite test?
1 year later?
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AutoValue
https://github.com/google/auto
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Usage
// root
dependencies {
classpath ‘com.neenbedankt.gradle.plugins:android-apt:1.8’
…
}
…
// app
dependencies {
provided 'com.google.auto.value:auto-value:1.3-rc2'
}
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AutoValue
• Add @AutoValue to make objects value-
typed using generated boilerplate codes
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@AutoValue
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AutoValue
• Add @AutoValue to make objects value-
typed using generated boilerplate codes
• Add @AutoValue.Builder to create Builder
class for your auto-value object
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@AutoValue.Builder
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AutoValue
• Add @AutoValue to make objects value-
typed using generated boilerplate codes
• Add @AutoValue.Builder to create Builder
class for your auto-value object
• AutoValue Extension support for
Parcelable, Gson, Moshi, Cursor, and more..
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Usage(auto-value-parcel)
// root
dependencies {
classpath ‘com.neenbedankt.gradle.plugins:android-apt:1.8’
…
}
…
// app
dependencies {
provided ‘com.google.auto.value:auto-value:1.3-rc2'
// auto-value-parcel
apt 'com.ryanharter.auto.value:auto-value-parcel:0.2.3-rc2'
}
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AutoValue Extension:
auto-value-parcel
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Learn more about AutoValue:
• “A Deeper Look at AutoValue” - Ryan Harter
http://ryanharter.com/blog/2016/04/08/autovalue-deep-
dive/
• “AutoValue Extensions” - Ryan Harter
http://ryanharter.com/blog/2016/05/16/autovalue-
extensions/
• “AutoValue Extensions” - Jake Wharton
http://jakewharton.com/auto-value-extensions-ny-
android-meetup/
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AutoValue
shaunkawano
fin.