安卓打包

命令

使用命令 gradlew 进行编译/clean/打包等操作, gradlew 是 gradle + wrapper, 构建脚本采用了 Groovy.

RN 项目中, android/gradle/wrapper/gralde-wrapper.properties 中声明了它指向的目录和版本. 只要下载成功即可用 grdlew wrapper 的命令代替全局的 gradle 命令.

./gradlew -v 查看版本
./gradlew clean 清除build文件夹
./gradlew build 打包(所有variant)
./gradlew assemble 打包(所有variant)
./gradlew assembleDebug 编译并打包debug
./gradlew assembleRelease 编译并打包release

# assemble|**ProductFlavour**|**BuildType**
$ ./gradlew assembleBetaRelease

#--variant=<productFlavour><BuildType>
$ react-native run-android --variant=devDebug

$ ./gradlew assembleDebug -Pcustom=true

可以在 build.gradle 中判断自定义参数:

if (project.hasProperty('custom')){

}

执行编译会去执行各个 gradle 中的脚本, 比如说 app 下的 build.gradle 又回依赖 rn 的 gradle:

apply from: "../../node_modules/react-native/react.gradle"

gradle 可以配置打包参数, 构建编译类型, 配置 flavors, 新建 task.

可以使用 ./gradlew tasks 查看所有支持的的 tasks:

Android tasks
androidDependencies
signingReport
sourceSets

Build tasks
assemble - Assembles all variants of all applications and secondary packages.
assembleAndroidTest - Assembles all the Test applications.
assembleDebug - Assembles all Debug builds.
assembleRelease - Assembles all Release builds.
build - Assembles and tests this project.
buildDependents - Assembles and tests this project and all projects that depend on it.
buildNeeded - Assembles and tests this project and all projects it depends on.
clean - Deletes the build directory.
cleanBuildCache - Deletes the build cache directory.
compileDebugAndroidTestSources
compileDebugSources
compileDebugUnitTestSources
compileReleaseSources
compileReleaseUnitTestSources
mockableAndroidJar

Build Setup tasks
init - Initializes a new Gradle build.

Help tasks
buildEnvironment - Displays all buildscript dependencies declared in root project 'demo2'.
components
dependencies - Displays all dependencies declared in root project 'demo2'.
dependencyInsight - Displays the insight into a specific dependency in root project 'demo2'.
dependentComponents - Displays the dependent components of components in root project 'demo2'. [incubating]
help - Displays a help message.
model
projects - Displays the sub-projects of root project 'demo2'.
properties - Displays the properties of root project 'demo2'.
tasks - Displays the tasks runnable from root project 'demo2' (some of the displayed tasks may belong to subprojects).


Install tasks
installDebug - Installs the Debug build.
installDebugAndroidTest - Installs the android (on device) tests for the Debug build.
uninstallAll - Uninstall all applications.
uninstallDebug - Uninstalls the Debug build.
uninstallDebugAndroidTest - Uninstalls the android (on device) tests for the Debug build.
uninstallRelease - Uninstalls the Release build.

React tasks
bundleDebugJsAndAssets - bundle JS and assets for Debug.
bundleReleaseJsAndAssets - bundle JS and assets for Release.
copyDebugBundledJs - copy bundled JS into Debug.
copyReleaseBundledJs - copy bundled JS into Release.


Verification tasks
check - Runs all checks.
connectedAndroidTest
connectedCheck - Runs all device checks on currently connected devices.
connectedDebugAndroidTest
deviceAndroidTest
deviceCheck - Runs all device checks using Device Providers and Test Servers.
lint - Runs lint on all variants.
lintDebug - Runs lint on the Debug build.
lintRelease - Runs lint on the Release build.
lintVitalRelease - Runs lint on just the fatal issues in the release build.
test - Run unit tests for all variants.
testDebugUnitTest - Run unit tests for the debug build.
testReleaseUnitTest - Run unit tests for the release build.

使用 ./gradlew build --dry-run 来查看编译会执行哪些tasks(会skip,并不会真正执行)

➜  android ./gradlew build --dry-run
:app:preBuild SKIPPED
:app:preDebugBuild SKIPPED
:app:compileDebugAidl SKIPPED
:app:compileDebugRenderscript SKIPPED
:app:checkDebugManifest SKIPPED
:app:generateDebugBuildConfig SKIPPED
:app:prepareLintJar SKIPPED
:app:mainApkListPersistenceDebug SKIPPED
:app:bundleDebugJsAndAssets SKIPPED
:app:generateDebugResValues SKIPPED
:app:generateDebugResources SKIPPED
:app:mergeDebugResources SKIPPED
:app:createDebugCompatibleScreenManifests SKIPPED
:app:processDebugManifest SKIPPED
:app:splitsDiscoveryTaskDebug SKIPPED
:app:processDebugResources SKIPPED
:app:generateDebugSources SKIPPED
:app:javaPreCompileDebug SKIPPED
:app:compileDebugJavaWithJavac SKIPPED
:app:compileDebugNdk SKIPPED
:app:compileDebugSources SKIPPED
:app:mergeDebugShaders SKIPPED
:app:compileDebugShaders SKIPPED
:app:generateDebugAssets SKIPPED
:app:mergeDebugAssets SKIPPED
:app:copyDebugBundledJs SKIPPED
:app:transformClassesWithDexBuilderForDebug SKIPPED
:app:transformDexArchiveWithExternalLibsDexMergerForDebug SKIPPED
:app:transformDexArchiveWithDexMergerForDebug SKIPPED
:app:mergeDebugJniLibFolders SKIPPED
:app:transformNativeLibsWithMergeJniLibsForDebug SKIPPED
:app:processDebugJavaRes SKIPPED
:app:transformResourcesWithMergeJavaResForDebug SKIPPED
:app:validateSigningDebug SKIPPED
:app:packageDebug SKIPPED
:app:assembleDebug SKIPPED
:app:preReleaseBuild SKIPPED
:app:compileReleaseAidl SKIPPED
:app:compileReleaseRenderscript SKIPPED
:app:checkReleaseManifest SKIPPED
:app:generateReleaseBuildConfig SKIPPED
:app:mainApkListPersistenceRelease SKIPPED
:app:bundleReleaseJsAndAssets SKIPPED
:app:generateReleaseResValues SKIPPED
:app:generateReleaseResources SKIPPED
:app:mergeReleaseResources SKIPPED
:app:createReleaseCompatibleScreenManifests SKIPPED
:app:processReleaseManifest SKIPPED
:app:splitsDiscoveryTaskRelease SKIPPED
:app:processReleaseResources SKIPPED
:app:generateReleaseSources SKIPPED
:app:javaPreCompileRelease SKIPPED
:app:compileReleaseJavaWithJavac SKIPPED
:app:compileReleaseNdk SKIPPED
:app:compileReleaseSources SKIPPED
:app:lintVitalRelease SKIPPED
:app:mergeReleaseShaders SKIPPED
:app:compileReleaseShaders SKIPPED
:app:generateReleaseAssets SKIPPED
:app:mergeReleaseAssets SKIPPED
:app:copyReleaseBundledJs SKIPPED
:app:transformClassesWithDexBuilderForRelease SKIPPED
:app:transformDexArchiveWithExternalLibsDexMergerForRelease SKIPPED
:app:transformDexArchiveWithDexMergerForRelease SKIPPED
:app:mergeReleaseJniLibFolders SKIPPED
:app:transformNativeLibsWithMergeJniLibsForRelease SKIPPED
:app:processReleaseJavaRes SKIPPED
:app:transformResourcesWithMergeJavaResForRelease SKIPPED
:app:packageRelease SKIPPED
:app:assembleRelease SKIPPED
:app:assemble SKIPPED
:app:lint SKIPPED
:app:preDebugUnitTestBuild SKIPPED
:app:javaPreCompileDebugUnitTest SKIPPED
:app:compileDebugUnitTestJavaWithJavac SKIPPED
:app:mockableAndroidJar SKIPPED
:app:processDebugUnitTestJavaRes SKIPPED
:app:testDebugUnitTest SKIPPED
:app:preReleaseUnitTestBuild SKIPPED
:app:javaPreCompileReleaseUnitTest SKIPPED
:app:compileReleaseUnitTestJavaWithJavac SKIPPED
:app:processReleaseUnitTestJavaRes SKIPPED
:app:testReleaseUnitTest SKIPPED
:app:test SKIPPED
:app:check SKIPPED
:app:build SKIPPED

Android Studio

Android Studio 本质上其实还是 Intellij IDEA.

点击Run按钮对于IDEA来说，其实是执行一个事先配置好的 [ Run/Debug Configuration ]，对于Android项目来说，往往是一个名为 [ Android App ] 的 Configuration。按照IntellIJ SDK约定，一个Configuration的执行包括俩个过程：RunState 的创建和执行。

点击 Run 按钮，就相当于执行了一次 Gradle Task，一般来说，是assembleDebug或者assembleRelease。

将代码打包成APK，这里面涉及到编译、打包、签名、混淆等；

安装APK到设备；

在设备上运行APK。

如果单元测试的代码有问题，直接Run是不会检查的。但是Make Project会。因为Run的时候仅执行了assembleDebug，但是跑单元测试时需要执行 assembleDebug和assembleDebugAndroidTest。

varient = flavors ✖️ buildTypes

Build Type

分为 debug 和 release

Product Flavor

这个概念主要是为了满足如下需求：同一份代码要打多个包，例如收费 pay 和免费 free，逻辑上有一些小区别，又不想通过逻辑判断这种丑陋的方式。或者你要实现所谓多渠道打包。

gradle 变动就需要重新 sync 下.
make 是指在上次编译的基础上, 对修改过的文件进行编译
clean 是指清理编译缓存
rebuild 清理缓存, 重新编译
build apks 生成debug apk
generate signed apk 生成签名的release apk

只要是编译就会生成 debug apk, 不信删掉 app-debug.apk 点击 make, 完成再去 android/app/build/outputs/apk/debug 看下.

RN

在 react.gradle 中定义了几个 task

bundleDebugJsAndAssets
bundleReleaseJsAndAssets
copyDebugBundledJs
copyReleaseBundledJs

打包js和图片资源, 拷贝至apk指定目录.

其实运行debug时候, 并不会去执行打包js, 只会当app启动时候再打包, 通过数据线传输到手机, 或者传输到chrome执行, 执行结果再代理到手机.

有个未知问题:

项目中(RN 0.55)使用android studio打release包, 必须先手动打js包, 再打apk包, 否则打出的apk会找不到jsbundle.

但是新建的demo中, 直接打apk包, 就会执行打js包, 拷贝到apk.

配置安卓环境

buildTypes {
        release {
            signingConfig signingConfigs.release
            aaptOptions.cruncherEnabled = false
            aaptOptions.useNewCruncher = false
            minifyEnabled enableProguardInReleaseBuilds
            proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
            buildConfigField "String", "CODEPUSH_KEY", '"abc"'
            manifestPlaceholders = [
                APP_NAME: 'app',
                APP_ICON: '@mipmap/logo'
            ]
        }
        betaRelease {
            signingConfig signingConfigs.release
            aaptOptions.cruncherEnabled = false
            aaptOptions.useNewCruncher = false
            minifyEnabled enableProguardInReleaseBuilds
            proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
            buildConfigField "String", "CODEPUSH_KEY", '"def"'
            manifestPlaceholders = [
                APP_NAME: 'app-beta',
                APP_ICON: '@mipmap/logo_beta'
            ]
        }
        debug {
            buildConfigField "String", "CODEPUSH_KEY", '""'
            applicationIdSuffix ".debug"
            manifestPlaceholders = [
                APP_NAME: 'app-debug',
                APP_ICON: '@mipmap/logo_debug'
            ]
        }
    }

在代码中可以使用变量 buildConfigField:

new CodePush(BuildConfig.CODEPUSH_KEY,getApplicationContext(),BuildConfig.DEBUG)

在 AndroidManifest.xml 使用 manifestPlaceholders:

<application
        tools:replace="android:label"
        android:name=".MainApplication"
        android:allowBackup="false"
        android:icon="${APP_ICON}"
        android:label="${APP_NAME}"
        android:theme="@style/AppTheme">

        <activity
            android:name=".MainActivity"
            android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
            android:label="${APP_NAME}"

        <meta-data
            android:name="JPUSH_APPKEY"
            android:value="${JPUSH_APPKEY}" />
        <meta-data
            android:name="JPUSH_CHANNEL"
            android:value="${APP_CHANNEL}" />

打包不同 flavor

android {
  productFlavors {
    xiaomi {
      applicationId "com.demo2.xiaomi"
      signingConfig signingConfigs.release
    }
    huawei {
      applicationId "com.demo2.huawei"
      signingConfig signingConfigs.release
    }
    meilan {
      applicationId "com.demo2.meilan"
      signingConfig signingConfigs.release
    }
  }
}

使用 ./gradlew assembleRelease 会打出来三个包不同的 applicationId.

这里是我的 demo, demo 中暴露出安卓的 flavor 名给 RN:

console.log(AppInfo.flavorName); // huawei meilan xiaomi

RN 打包之坑

项目中打包apk之前需要提前手动打包js, 在 app 下 build.gradle 中:

apply from: "../../node_modules/react-native/react.gradle"

react.gradle 中有一个 "bundle${targetName}JsAndAssets" 的任务, 使用 ./gradlew build --dry-run | grep bundle:

:app:bundleBetaReleaseJsAndAssets SKIPPED
:app:bundleDebugJsAndAssets SKIPPED
:app:bundleReleaseJsAndAssets SKIPPED
:jcore-react-native:bundleDebug SKIPPED
:jcore-react-native:bundleRelease SKIPPED
:jpush-react-native:bundleDebug SKIPPED
:jpush-react-native:bundleRelease SKIPPED
:react-native-camera:bundleDebug SKIPPED
:react-native-camera:bundleRelease SKIPPED
:react-native-code-push:bundleDebug SKIPPED
:react-native-code-push:bundleRelease SKIPPED
:react-native-device-info:bundleDebug SKIPPED
:react-native-device-info:bundleRelease SKIPPED
:react-native-image-crop-picker:bundleDebug SKIPPED
:react-native-image-crop-picker:bundleRelease SKIPPED
:react-native-prompt-android:bundleDebug SKIPPED
:react-native-prompt-android:bundleRelease SKIPPED
:react-native-video:bundleDebug SKIPPED
:react-native-video:bundleRelease SKIPPED
:react-native-webview:bundleDebug SKIPPED
:react-native-webview:bundleRelease SKIPPED
:react-native-wechat:bundleDebug SKIPPED
:react-native-wechat:bundleRelease SKIPPED
:rn-fetch-blob:bundleDebug SKIPPED
:rn-fetch-blob:bundleRelease SKIPPED

可以看到会执行 bundle*JsAndAssets 这个 task, 但是为何使用 Android studio 就不会执行呢?

官方文档有这一句话:

Note: Make sure gradle.properties does not include org.gradle.configureondemand=true as that will make the release build skip bundling JS and assets into the APK.

在项目的 gradle.properties 找不到 org.gradle.configureondemand, 以为不是这个原因, 但其实就是这个原因: Android Studio 中的 Preference - Build,Execution,Deployment - Compiler - Configure on Demand 默认被勾选上了.

所以取消勾选就可以使用 Android Studio 自动打js包了.

命令