Android Studio 配置并使用Protocol Buffer生成java文件
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2022-03-31 08:21:23
一、环境配置(一)Project的build.gradle添加Protobuf插件版本信息和maven仓库mavenCentral() classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.13'具体位置如下:buildscript { repositories { google() mavenCentral() //choice 1: //jcenter...
一、环境配置
(一)Project的build.gradle
- 添加Protobuf插件版本信息和maven仓库
mavenCentral()
classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.13'
具体位置如下:
buildscript {
repositories {
google()
mavenCentral()
//choice 1:
//jcenter()
//choice 2:
//change mirror
maven{ url'http://maven.aliyun.com/nexus/content/groups/public/' }
maven{ url'http://maven.aliyun.com/nexus/content/repositories/jcenter'}
}
dependencies {
classpath 'com.android.tools.build:gradle:4.1.0'
classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.13'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
(二)AppModule的build.gradle
1. 声明依赖的protobuf插件
- plugins闭包或apply写法二选一
//apply plugin:'com.android.application'
//apply plugin: 'com.google.protobuf'
plugins {
id 'com.android.application'
id 'com.google.protobuf'//gradle脚本头,声明依赖的插件
}
2. 指定protobuf所在路径(在android闭包中)
- 不指定时,默认与java同级的目录,否则不能被识别编译
- 如下,指定了在java指定目录下为源目录
android{
......//省略其他配置项
sourceSets {
main {
java {
srcDirs 'src/main/java'
}
proto {
srcDirs 'src/main/java/com/demo/protocolbuffer'
}
}
}
}
3. 添加protobuf依赖
dependencies {
//....
implementation 'com.google.protobuf:protobuf-java:4.0.0-rc-2'
implementation 'com.google.protobuf:protoc:4.0.0-rc-2'
//....
}
4. 设置protobuf编译任务
//编写编译任务,调用plugin编译生成java文件
protobuf {
protoc {
artifact = 'com.google.protobuf:protoc:3.6.1'
}
generateProtoTasks {
all().each { task ->
task.builtins {
remove java
}
task.builtins {
java {}
}
}
}
}
二、定义proto文件
- 参考[Google]Protocol Buffer Basics: Java:https://developers.google.cn/protocol-buffers/docs/javatutorial
syntax = "proto2";
package com.demo.protocolbuffer;
option java_package = "com.demo.protocolbuffer";
option java_outer_classname = "AddressBookProtos";
message Person {
optional string name = 1;
optional int32 id = 2;
optional string email = 3;
enum PhoneType {
MOBILE = 0;
HOME = 1;
WORK = 2;
}
message PhoneNumber {
optional string number = 1;
optional PhoneType type = 2 [default = HOME];
}
repeated PhoneNumber phones = 4;
}
message AddressBook {
repeated Person people = 1;
}
三、结构目录与效果
一些问题(插件版本)
- 目前采用4.0.0-rc-2版本(maven最新的),如果把procobuf中protoc也换成这个版本会出错,修改成3.6.1不会出错
- 全部使用3.6.1也不会错
Execution failed for task ‘:protocolbufferdemo:generateDebugProto’.
java.io.IOException: Cannot run program “C:\Users\xxxx.gradle\caches\modules-2\files-2.1\com.google.protobuf\protoc\4.0.0-rc-2\474b3604dbd7dff7aa733a745056dfa2dc946eeb\protoc-4.0.0-rc-2-windows-x86_64.exe”:
CreateProcess error=1392, The file or directory is corrupted and
unreadable
本文地址:https://blog.csdn.net/qq_38666896/article/details/109379561
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