• 前言
• 最簡單實(shí)踐案例
  • 指定SDK版本
  • 指定flutter版本
  • 測試
• 出現(xiàn)的問題
  • 問題一：本地正常跑，但是鏡像中很多依賴下載不下來
  • 問題二： flutter build apk 緩慢
    • 解決方案一

前言

本項(xiàng)目主要參考cirruslabs的兩個(gè)Docker腳本

• docker-images-flutter

• docker-images-android

本筆記主要是簡化和增加一些實(shí)際過程中一些經(jīng)驗(yàn)總結(jié)

最簡單實(shí)踐案例

指定SDK版本

Dockerfile

FROM cirrusci/android-sdk:tools

ENV ANDROID_PLATFORM_VERSION 29
ENV ANDROID_BUILD_TOOLS_VERSION 29.0.2

RUN yes | sdkmanager \
    "platforms;android-$ANDROID_PLATFORM_VERSION" \
    "build-tools;$ANDROID_BUILD_TOOLS_VERSION"

編譯鏡像爽蝴，和上面Dockerfile同級目錄執(zhí)行

docker build -t "image_name" . 

• -t 指定鏡像名稱；
• . 當(dāng)前目錄找Dockerfile 編譯文件

如果需要多個(gè)SDK的話养叛，可以在上次編譯鏡像的基礎(chǔ)上疊一層痹届，修改Dockfile

<font color=red>建議不要疊太多SDK幌衣，否則最終的鏡像會很大巷波，而且正式環(huán)境是不需要多個(gè)SDK的</font>

Dockerfile

FROM <上次編譯的鏡像名稱或者ID>

ENV ANDROID_PLATFORM_VERSION 29
ENV ANDROID_BUILD_TOOLS_VERSION 29.0.2

RUN yes | sdkmanager \
    "platforms;android-$ANDROID_PLATFORM_VERSION" \
    "build-tools;$ANDROID_BUILD_TOOLS_VERSION"

備注： 這里提供自己編譯好的SDK版本彰亥，本人比較懶提供常用編譯好的SDK

dockerlinz/android-sdk:29

dockerlinz/android-sdk:28

dockerlinz/android-sdk:27

指定flutter版本

Dockerfile

FROM dockerlinz/android-sdk:27

ARG flutter_version

ENV FLUTTER_HOME=${HOME}/sdks/flutter \
    FLUTTER_ROOT=$FLUTTER_HOME \
    FLUTTER_VERSION=$flutter_version \
    PUB_HOSTED_URL=https://pub.flutter-io.cn \
    FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn

RUN mkdir -p ${FLUTTER_HOME}

ENV PATH ${PATH}:${FLUTTER_HOME}/bin:${FLUTTER_HOME}/bin/cache/dart-sdk/bin

RUN git clone --branch ${FLUTTER_VERSION} https://github.com/flutter/flutter.git ${FLUTTER_HOME} && \
    flutter doctor

這里我們使用v1.9.1-hotfixes分支

docker build --tag --build-arg flutter_version=v1.9.1-hotfixes

測試

進(jìn)入flutter工程所在目錄

docker run --rm -it -v ${PWD}:/build --workdir /build dockerlinz/flutter:stable flutter build apk 

可以加入 -v ~/.gradle:/home/cirrus/.gradle --env GRADLE_USER_HOME=/home/cirrus/.gradle泪漂，掛在本地緩存到鏡像中

<font color=red> 注意：過來人經(jīng)驗(yàn)廊营，此處沒有把握的話還是進(jìn)入容器里面測試會更省事</font>

docker run --rm -it -v ${PWD}:/build --workdir /build dockerlinz/flutter:stable

進(jìn)入后需要重新生成.packages

fluter clean 
flutter packages get 

最好進(jìn)入android或mac目錄執(zhí)行以下原生編譯腳本，查看編譯環(huán)境

./gradlew build -d 

最后才是flutter編譯

flutter build apk 

出現(xiàn)的問題

問題一：本地正常跑萝勤，但是鏡像中很多依賴下載不下來

• <font color=red> android studio Could not download guava.jar</font>
• <font color=red> Could not download kotlin-gradle-plugin.jar</font>
• <font color=red>flutter Build file '/build/android/app/build.gradle' line: 25</font>
• <font color=red>Could not download kotlin-reflect.jar org.jetbrains.kotlin:kotlin-reflect:1.2.0</font>

解決：方案

1. 在gradle中增加阿里云國內(nèi)鏡像

   buildscript {
       repositories {
           maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
           google()
           jcenter()
       }
   
       dependencies {
           classpath 'com.android.tools.build:gradle:3.3.1'
       }
   }
   
   allprojects {
       repositories {
           maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
           google()
           jcenter()
       }
   }
   

2. 掛載本地gradle 緩存到鏡像中

   docker run --rm -it -v ${PWD}:/build --workdir /build  -v ~/.gradle:/home/cirrus/.gradle --env GRADLE_USER_HOME=/home/cirrus/.gradle  dockerlinz/flutter:stable
   

問題二： flutter build apk 緩慢

每次都下載gradle版本露筒，導(dǎo)致每次重新下載gradle版本

解決方案一

掛在本地緩存到鏡像中

 -v ~/.gradle:/home/cirrus/.gradle --env GRADLE_USER_HOME=/home/cirrus/.gradle

解決方案二

1. 掛在.gradle 緩存目錄，不用每次編譯的時(shí)候重新下載依賴

   -v ~/.gradle2:/home/cirrus/.gradle
   

2. 在疊一層gradle環(huán)境

   #https://github.com/frekele/docker-gradle/blob/master/Dockerfile
   FROM dockerlinz/flutter:1.9.1-hotfixes
   
   # Change to tmp folder
   ENV GRADLE_VERSION=4.10.2
   ENV GRADLE_HOME=/opt/gradle
   ENV GRADLE_FOLDER=/root/.gradle
   
   # Change to tmp folder
   WORKDIR /tmp
   
   # Download and extract gradle to opt folder
   RUN wget --no-check-certificate --no-cookies https://downloads.gradle.org/distributions/gradle-${GRADLE_VERSION}-bin.zip \
       && sudo unzip gradle-${GRADLE_VERSION}-bin.zip -d /opt \
       && sudo ln -s /opt/gradle-${GRADLE_VERSION} /opt/gradle \
       && sudo rm -f gradle-${GRADLE_VERSION}-bin.zip
   
   # Add executables to path
   RUN sudo update-alternatives --install "/usr/bin/gradle" "gradle" "/opt/gradle/bin/gradle" 1 && \
       sudo update-alternatives --set "gradle" "/opt/gradle/bin/gradle"
   
   # Create .gradle folder
   RUN sudo mkdir -p $GRADLE_FOLDER
   
   # Mark as volume
   VOLUME  $GRADLE_FOLDER
   
   # Add the files
   #ADD rootfs /
   
   # Change to root folder
   WORKDIR /home/cirrus/
   

3. Flutter 中Android工程指定本地gradle編譯敌卓，不是取下載慎式，文件目錄<android_project>/.idea/gradle.xml

   <?xml version="1.0" encoding="UTF-8"?>
   <project version="4">
     <component name="GradleSettings">
       <option name="linkedExternalProjectsSettings">
         <GradleProjectSettings>
           <compositeConfiguration>
             <compositeBuild compositeDefinitionSource="SCRIPT" />
           </compositeConfiguration>
           <option name="distributionType" value="LOCAL" />
           <option name="externalProjectPath" value="$PROJECT_DIR$" />
           <option name="gradleHome" value="$USER_HOME$/.gradle/wrapper/dists/gradle-4.4-all/9br9xq1tocpiv8o6njlyu5op1/gradle-4.4/bin" />
           <option name="resolveModulePerSourceSet" value="false" />
           <option name="testRunner" value="PLATFORM" />
         </GradleProjectSettings>
       </option>
     </component>
   </project>
   

   • distributionType 改為LOCAL
   • gradleHome 指向gradle_home/bin