Experience protocol buffer on android
9 likes2,189 views
The document introduces Protocol Buffers and how to use them on Android. It discusses the benefits of Protocol Buffers such as speed, size, and compatibility. It also provides a demo comparing the performance of Protocol Buffers to GSON, showing that Protocol Buffers are faster and produce smaller data sizes. The document concludes by mentioning some drawbacks of Protocol Buffers and providing references for further information.
Experience protocol buffer on android
- 2. HELLO! I am Richard Chang Android Engineer Worked for HTC, Movial, VMFive and AndroVideo You can find me via chiel99 AT gmail.com
- 3. Outline ● Introduce Protocol Buffers ● Why Protocol Buffers ● How to use Protocol Buffers ● Protocol buffer meets Android ● Demo ● Reference https://github.com/chiel99/ExperienceProtobuf
- 5. Protocol buffers are Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data From: https://developers.google.com/protocol-buffers/
- 9. Benefits ● Speed ○ Fast ● Size ○ Small ○ Serialize to binary-format stream ● Backward Compatible ● Multiple programming language support ○ C++ / Java / Python / C# / Go...etc ● Easy to define the data schema
- 10. How to use protocol buffers?
- 11. Usages ● Install protoc (protocol buffer compiler) and related libs ○ steps ● Write a .proto file ● Use protoc to generate the Java/C++/Python... source code ○ protoc --cpp_out=./cpp --java_out=./java sample.proto ● Add related libs to your project ● Put the generated source code to your project ● writeTo() and parseFrom() ● Happy coding with Protocol Buffers!
- 12. Sample
- 13. Protocol Buffers meet Android ● AOSP/external/protobuf/ ○ protoc => aprotoc ○ AOSP is not following the latest version ● Dex 65535 method count issue ● Apk size issue
- 14. Protocol Buffers for Java Lite version Micro version Nano version Lib size 128 KB 21 KB 43 KB Generated Java class size* 7~8x 1.2~1.3x 1x Object creation Builder Constructor Constructor Object operations Builder / Setter / Getter Setter / Getter public member Repeated objects List List Array
- 15. Demo
- 16. Speed and Size comparison with GSON ● Speed ○ Serialize: ~10x faster (40 ms v.s 400 ms) ○ Deserialize: ~2x faster (15 ms v.s 30 ms) ● Serialized data size ○ ~2x smaller (24 KB v.s 45 KB) ● Lib size ○ ~10x smaller (21 KB v.s 232 KB)
- 17. Drawbacks ● Human unreadable format ● Need tool (protoc) to generate source code ● Most network services are JSON based?
- 18. Thanks! Any questions? You can find the sample code on github: https://github.com/chiel99/ExperienceProtobuf
- 19. Reference ● https://developers.google.com/protocol-buffers/ ● https://github.com/android/platform_external_protobuf ● AOSP: frameworks/native/opengl/libs/GLES_trace ● https://github.com/square/wire ● https://github.com/Biuni/PokemonGO-Pokedex