如何包含“com”。谷歌。android项目(gradle)上的protobuf是否完整,但是否精简?

我正在尝试使用protobuf生成的代码来解码来自网络的消息。我有一个。如下所示的原型文件:

syntax = "proto3";

message CanData {
  string id = 1; // name
  Data data1 = 2;
  Data data2 = 3;     
}
message Data {
    oneof data1 {
        int32 int_type = 2; // Magic and other int types
        float float_type = 3; // Timestamp and other float types
        uint32 unsigned_type = 4; // unsigned types
    }
}

当我使用protoc命令生成代码时。它工作得很成功。但后来我打开了android项目,它并没有按预期工作。我得到的错误如下所示:

Error:(11, 26) error: cannot find symbol class ExtensionRegistry
Error:(1719, 43) error: package com.google.protobuf.GeneratedMessageV3 does not exist
Error:(1716, 55) error: package com.google.protobuf.Descriptors does not exist
Error:(1724, 43) error: package com.google.protobuf.GeneratedMessageV3 does not exist
Error:(1721, 55) error: package com.google.protobuf.Descriptors does not exist

还有很多错误。但为了简单明了,我把它们藏了起来。

然后在互联网上查看,我们遇到了一系列对我们不起作用的解决方案,例如我们在构建中尝试做的事情。格拉德尔:

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.4'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

并构建。gradle(模块应用程序)

apply plugin: 'com.android.application'
apply plugin: 'com.google.protobuf'

android {
    compileSdkVersion 25
    defaultConfig {
        applicationId "oronos.oronosmobileapp"
        minSdkVersion 25
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    productFlavors {
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:25.4.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'com.google.protobuf:protobuf-lite:3.0.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}

我认为lite版本:

通用域名格式。谷歌。protobuf:protobuf lite:3.0.0

不是我正在寻找的,但我无法找到解决方案。