React Native Android入门实战及深入源码分析系列（2）——React Native源码编译

本文为老曾原创，转载需注明出处：http://blog.csdn.net/minimicall?viewmode=contents

在上一节中，我们通过一个相册的制作来学习了React Native编写。这一节我们需要开始学习React Native的源码。

学习源码，从编译源码开始。

首先，我们需要把代码从github中克隆下来。

https://github.com/facebook/react-native.git

然后，我们可以切换到它的稳定分支，2016-03-30是我的操作时间，这个时候0.23-stable是最新的稳定版本。

git checkout -b 0.23-stable remotes/origin/0.23-stable

我们首先升级一下我们的react-native，因为等下创建项目最好使用最新版本的。

首先，我们需要查询最新版本：

nam info react-native

得到最新版本是0.22.2

npm install --save [email protected]

接下来，创建一个项目：

react-native init videolegend

好，等待漫长的初始化过程。

完事之后，打开项目顶层的package.json文件：

{  "name": "videolegend",  "version": "0.0.1",  "private": true,  "scripts": {    "start": "node node_modules/react-native/local-cli/cli.js start"  },  "dependencies": {    "react": "^0.14.8",    "react-native": "^0.22.2"  }}

可以看出我们的一个版本的基本信息。

接下来，我们来进行源码的编译。编译源码，官网有一个页面，我们的过程呢，也是基于它的，但如果你完全基于它，那么你是会吃亏的。

所以，为什么我要写一篇文章出来，给大家作为参考。

官网源码编译地址：点击打开链接

前置条件：

1、SDK ： compileSdkVersion 23

2、SDK build tools : 23.0.1

3、Android Support Repository >=17

4 、 NDK (4.8哦就是 ndk-r10b,，4.9都不行,会坑出很多问题，如果NDK版本不对。）

使用AndroidStudio打开项目。

1、项目顶层build.grade的配置：

// Top-level build file where you can add configuration options common to all sub-projects/modules.buildscript {    repositories {        jcenter()    }    dependencies {        classpath 'com.android.tools.build:gradle:1.3.1'//加下面这一行        classpath 'de.undercouch:gradle-download-task:2.0.0'        // NOTE: Do not place your application dependencies here; they belong        // in the individual module build.gradle files    }}allprojects {    repositories {        mavenLocal()        jcenter()        maven {            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm            url "$projectDir/../../node_modules/react-native/android"        }    }}

2、添加ReactAndroid模块，在顶层的setting.grade文件中，配置如下：

rootProject.name = 'videolegend'include ':app'include ':ReactAndroid'project(':ReactAndroid').projectDir = new File('/Users/zengjinlong/workplace/react/reactnativesrc/react-native/ReactAndroid')

那个绝对目录是我的，你只需要改成你的就行。

3、更改项目依赖：在应用模块的build.gradle里面更改依赖部分：

dependencies {    compile fileTree(dir: "libs", include: ["*.jar"])    compile "com.android.support:appcompat-v7:23.0.1"    //compile "com.facebook.react:react-native:+"  // From node_modules    compile project(':ReactAndroid')}

注释掉原来的，更改为模块依赖。

官网到这里，就叫你可以run啦。呵呵，too young too simple。

首先，ReactAndroid里面的有些下载任务你给它再多时间都不可能完成。所以。。。我们需要离线下载好。然后更改其脚本，进行编译。

1、离线下载好

boost_1_57_0

double_conversion-1.1.1

folly-deprecate-dynamic-initializer

glog-0.3.3

jsc头文件

然后按照目录放到ReactAndroid的build/downloads/目录下面。大概有450M内容。

2、修改ReactAndroid的build.grade脚本

主要是删掉那些下载任务的脚本，直接进入拷贝任务和编译任务。

来，我们来感受一下修改前和修改后的区别。

首先，修改前：

// Copyright 2015-present Facebook. All Rights Reserved.apply plugin: 'com.android.library'apply plugin: 'maven'apply plugin: 'de.undercouch.download'import de.undercouch.gradle.tasks.download.Downloadimport org.apache.tools.ant.taskdefs.condition.Osimport org.apache.tools.ant.filters.ReplaceTokens// We download various C++ open-source dependencies into downloads.// We then copy both the downloaded code and our custom makefiles and headers into third-party-ndk.// After that we build native code from src/main/jni with module path pointing at third-party-ndk.def downloadsDir = new File("$buildDir/downloads")def thirdPartyNdkDir = new File("$buildDir/third-party-ndk")task createNativeDepsDirectories {    downloadsDir.mkdirs()    thirdPartyNdkDir.mkdirs()} //下载boost 超级慢，所以自己下好吧task downloadBoost(dependsOn: createNativeDepsDirectories, type: Download) {    // Use ZIP version as it's faster this way to selectively extract some parts of the archive    src 'https://downloads.sourceforge.net/project/boost/boost/1.57.0/boost_1_57_0.zip'    // alternative    // src 'http://mirror.nienbo.com/boost/boost_1_57_0.zip'    onlyIfNewer true    overwrite false    dest new File(downloadsDir, 'boost_1_57_0.zip')}  //下载好boost后，拷贝到指定目录task prepareBoost(dependsOn: downloadBoost, type: Copy) {    from zipTree(downloadBoost.dest)    from 'src/main/jni/third-party/boost/Android.mk'    include 'boost_1_57_0/boost/**/*.hpp', 'Android.mk'    into "$thirdPartyNdkDir/boost"}//下载task downloadDoubleConversion(dependsOn: createNativeDepsDirectories, type: Download) {    src 'https://github.com/google/double-conversion/archive/v1.1.1.tar.gz'    onlyIfNewer true    overwrite false    dest new File(downloadsDir, 'double-conversion-1.1.1.tar.gz')}//task prepareDoubleConversion(dependsOn: downloadDoubleConversion, type: Copy) {    from tarTree(downloadDoubleConversion.dest)    from 'src/main/jni/third-party/double-conversion/Android.mk'    include 'double-conversion-1.1.1/src/**/*', 'Android.mk'    filesMatching('*/src/**/*', {fname -> fname.path = "double-conversion/${fname.name}"})    includeEmptyDirs = false    into "$thirdPartyNdkDir/double-conversion"}task downloadFolly(dependsOn: createNativeDepsDirectories, type: Download) {    src 'https://github.com/facebook/folly/archive/deprecate-dynamic-initializer.tar.gz'    onlyIfNewer true    overwrite false    dest new File(downloadsDir, 'folly-deprecate-dynamic-initializer.tar.gz');}task prepareFolly(dependsOn: downloadFolly, type: Copy) {    from tarTree(downloadFolly.dest)    from 'src/main/jni/third-party/folly/Android.mk'    include 'folly-deprecate-dynamic-initializer/folly/**/*', 'Android.mk'    eachFile {fname -> fname.path = (fname.path - "folly-deprecate-dynamic-initializer/")}    includeEmptyDirs = false    into "$thirdPartyNdkDir/folly"}task downloadGlog(dependsOn: createNativeDepsDirectories, type: Download) {    src 'https://github.com/google/glog/archive/v0.3.3.tar.gz'    onlyIfNewer true    overwrite false    dest new File(downloadsDir, 'glog-0.3.3.tar.gz')}// Prepare glog sources to be compiled, this task will perform steps that normally shoudl've been// executed by automake. This way we can avoid dependencies on make/automaketask prepareGlog(dependsOn: downloadGlog, type: Copy) {    from tarTree(downloadGlog.dest)    from 'src/main/jni/third-party/glog/'    include 'glog-0.3.3/src/**/*', 'Android.mk', 'config.h'    includeEmptyDirs = false    filesMatching('**/*.h.in') {        filter(ReplaceTokens, tokens: [                ac_cv_have_unistd_h: '1',                ac_cv_have_stdint_h: '1',                ac_cv_have_systypes_h: '1',                ac_cv_have_inttypes_h: '1',                ac_cv_have_libgflags: '0',                ac_google_start_namespace: 'namespace google {',                ac_cv_have_uint16_t: '1',                ac_cv_have_u_int16_t: '1',                ac_cv_have___uint16: '0',                ac_google_end_namespace: '}',                ac_cv_have___builtin_expect: '1',                ac_google_namespace: 'google',                ac_cv___attribute___noinline: '__attribute__ ((noinline))',                ac_cv___attribute___noreturn: '__attribute__ ((noreturn))',                ac_cv___attribute___printf_4_5: '__attribute__((__format__ (__printf__, 4, 5)))'        ])        it.path = (it.name - '.in')    }    into "$thirdPartyNdkDir/glog"}task downloadJSCHeaders(type: Download) {    def jscAPIBaseURL = 'https://svn.webkit.org/repository/webkit/!svn/bc/174650/trunk/Source/JavaScriptCore/API/'    def jscHeaderFiles = ['JSBase.h', 'JSContextRef.h', 'JSObjectRef.h', 'JSRetainPtr.h', 'JSStringRef.h', 'JSValueRef.h', 'WebKitAvailability.h']    def output = new File(downloadsDir, 'jsc')    output.mkdirs()    src(jscHeaderFiles.collect { headerName -> "$jscAPIBaseURL$headerName" })    onlyIfNewer true    overwrite false    dest output}// Create Android.mk library module based on so files from mvn + include headers fetched from webkit.orgtask prepareJSC(dependsOn: downloadJSCHeaders) << {    copy {        from zipTree(configurations.compile.fileCollection { dep -> dep.name == 'android-jsc' }.singleFile)        from {downloadJSCHeaders.dest}        from 'src/main/jni/third-party/jsc/Android.mk'        include 'jni/**/*.so', '*.h', 'Android.mk'        filesMatching('*.h', { fname -> fname.path = "JavaScriptCore/${fname.path}"})        into "$thirdPartyNdkDir/jsc";    }}def getNdkBuildName() {    if (Os.isFamily(Os.FAMILY_WINDOWS)) {        return "ndk-build.cmd"    } else {        return "ndk-build"    }}def findNdkBuildFullPath() {    // we allow to provide full path to ndk-build tool    if (hasProperty('ndk.command')) {        return property('ndk.command')    }    // or just a path to the containing directory    if (hasProperty('ndk.path')) {        def ndkDir = property('ndk.path')        return new File(ndkDir, getNdkBuildName()).getAbsolutePath()    }    if (System.getenv('ANDROID_NDK') != null) {        def ndkDir = System.getenv('ANDROID_NDK')        return new File(ndkDir, getNdkBuildName()).getAbsolutePath()    }    def ndkDir = android.hasProperty('plugin') ? android.plugin.ndkFolder :            plugins.getPlugin('com.android.library').sdkHandler.getNdkFolder()    if (ndkDir) {        return new File(ndkDir, getNdkBuildName()).getAbsolutePath()    }    return null}def getNdkBuildFullPath() {    def ndkBuildFullPath = findNdkBuildFullPath()    if (ndkBuildFullPath == null) {        throw new GradleScriptException(            "ndk-build binary cannot be found, check if you've set " +            "\$ANDROID_NDK environment variable correctly or if ndk.dir is " +            "setup in local.properties",            null)    }    if (!new File(ndkBuildFullPath).canExecute()) {        throw new GradleScriptException(            "ndk-build binary " + ndkBuildFullPath + " doesn't exist or isn't executable.\n" +            "Check that the \$ANDROID_NDK environment variable, or ndk.dir in local.proerties, is set correctly.\n" +            "(On Windows, make sure you escape backslashes in local.properties or use forward slashes, e.g. C:\\\\ndk or C:/ndk rather than C:\\ndk)",            null)    }    return ndkBuildFullPath}task buildReactNdkLib(dependsOn: [prepareJSC, prepareBoost, prepareDoubleConversion, prepareFolly, prepareGlog], type: Exec) {    inputs.file('src/main/jni/react')    outputs.dir("$buildDir/react-ndk/all")    commandLine getNdkBuildFullPath(),            'NDK_PROJECT_PATH=null',            "NDK_APPLICATION_MK=$projectDir/src/main/jni/Application.mk",            'NDK_OUT=' + temporaryDir,            "NDK_LIBS_OUT=$buildDir/react-ndk/all",            "THIRD_PARTY_NDK_DIR=$buildDir/third-party-ndk",            '-C', file('src/main/jni/react/jni').absolutePath,            '--jobs', project.hasProperty("jobs") ? project.property("jobs") : Runtime.runtime.availableProcessors()}task cleanReactNdkLib(type: Exec) {    commandLine getNdkBuildFullPath(),            '-C', file('src/main/jni/react/jni').absolutePath,            'clean'}task packageReactNdkLibs(dependsOn: buildReactNdkLib, type: Copy) {    from "$buildDir/react-ndk/all"    exclude '**/libjsc.so'    into "$buildDir/react-ndk/exported"}task packageReactNdkLibsForBuck(dependsOn: packageReactNdkLibs, type: Copy) {  from "$buildDir/react-ndk/exported"  into "src/main/jni/prebuilt/lib"}android {    compileSdkVersion 23    buildToolsVersion "23.0.1"    defaultConfig {        minSdkVersion 16        targetSdkVersion 22        versionCode 1        versionName "1.0"        ndk {            moduleName "reactnativejni"        }        buildConfigField 'boolean', 'IS_INTERNAL_BUILD', 'false'        testApplicationId "com.facebook.react.tests.gradle"        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"    }    sourceSets.main {        jni.srcDirs = []        jniLibs.srcDir "$buildDir/react-ndk/exported"        res.srcDirs = ['src/main/res/devsupport', 'src/main/res/shell', 'src/main/res/views/modal']        java {          srcDirs = ['src/main/java', 'src/main/libraries/soloader']          exclude 'com/facebook/react/processing'        }    }    tasks.withType(JavaCompile) {        compileTask -> compileTask.dependsOn packageReactNdkLibs    }    clean.dependsOn cleanReactNdkLib    lintOptions {        abortOnError false    }}dependencies {    compile fileTree(dir: 'src/main/third-party/java/infer-annotations/', include: ['*.jar'])    compile 'com.android.support:appcompat-v7:23.0.1'    compile 'com.android.support:recyclerview-v7:23.0.1'    compile 'com.facebook.fresco:fresco:0.8.1'    compile 'com.facebook.fresco:imagepipeline-okhttp:0.8.1'    compile 'com.facebook.stetho:stetho:1.2.0'    compile 'com.facebook.stetho:stetho-okhttp:1.2.0'    compile 'com.fasterxml.jackson.core:jackson-core:2.2.3'    compile 'com.google.code.findbugs:jsr305:3.0.0'    compile 'com.squareup.okhttp:okhttp:2.5.0'    compile 'com.squareup.okhttp:okhttp-ws:2.5.0'    compile 'com.squareup.okio:okio:1.6.0'    compile 'org.webkit:android-jsc:r174650'    testCompile "junit:junit:${JUNIT_VERSION}"    testCompile "org.powermock:powermock-api-mockito:${POWERMOCK_VERSION}"    testCompile 'com.fasterxml.jackson.core:jackson-databind:2.2.3'    testCompile "org.powermock:powermock-module-junit4-rule:${POWERMOCK_VERSION}"    testCompile "org.powermock:powermock-classloading-xstream:${POWERMOCK_VERSION}"    testCompile "org.mockito:mockito-core:${MOCKITO_CORE_VERSION}"    testCompile "org.easytesting:fest-assert-core:${FEST_ASSERT_CORE_VERSION}"    testCompile "org.robolectric:robolectric:${ROBOLECTRIC_VERSION}"    androidTestCompile "com.android.support.test:testing-support-lib:0.1"}apply from: 'release.gradle'

修改完以后：

// Copyright 2015-present Facebook. All Rights Reserved.apply plugin: 'com.android.library'apply plugin: 'maven'apply plugin: 'de.undercouch.download'import de.undercouch.gradle.tasks.download.Downloadimport org.apache.tools.ant.taskdefs.condition.Osimport org.apache.tools.ant.filters.ReplaceTokens// We download various C++ open-source dependencies into downloads.// We then copy both the downloaded code and our custom makefiles and headers into third-party-ndk.// After that we build native code from src/main/jni with module path pointing at third-party-ndk.def downloadsDir = new File("$buildDir/downloads")def thirdPartyNdkDir = new File("$buildDir/third-party-ndk")task createNativeDepsDirectories {    downloadsDir.mkdirs()    thirdPartyNdkDir.mkdirs()}////task downloadBoost(dependsOn: createNativeDepsDirectories, type: Download) {//    // Use ZIP version as it's faster this way to selectively extract some parts of the archive//    src 'https://downloads.sourceforge.net/project/boost/boost/1.57.0/boost_1_57_0.zip'//    // alternative//    // src 'http://mirror.nienbo.com/boost/boost_1_57_0.zip'//    onlyIfNewer true//    overwrite false//    dest new File(downloadsDir, 'boost_1_57_0.zip')//}task prepareBoost( type: Copy) {    from 'build/downloads/'    from 'src/main/jni/third-party/boost/Android.mk'    include 'boost_1_57_0/boost/**/*.hpp', 'Android.mk'    into "$thirdPartyNdkDir/boost"}//task downloadDoubleConversion(dependsOn: createNativeDepsDirectories, type: Download) {//    src 'https://github.com/google/double-conversion/archive/v1.1.1.tar.gz'//    onlyIfNewer true//    overwrite false//    dest new File(downloadsDir, 'double-conversion-1.1.1.tar.gz')//}task prepareDoubleConversion(type: Copy) {    from 'build/downloads/'    from 'src/main/jni/third-party/double-conversion/Android.mk'    include 'double-conversion-1.1.1/src/**/*', 'Android.mk'    filesMatching('*/src/**/*', {fname -> fname.path = "double-conversion/${fname.name}"})    includeEmptyDirs = false    into "$thirdPartyNdkDir/double-conversion"}//task downloadFolly(dependsOn: createNativeDepsDirectories, type: Download) {//    src 'https://github.com/facebook/folly/archive/deprecate-dynamic-initializer.tar.gz'//    onlyIfNewer true//    overwrite false//    dest new File(downloadsDir, 'folly-deprecate-dynamic-initializer.tar.gz');//}task prepareFolly(type: Copy) {    from 'build/downloads/'    from 'src/main/jni/third-party/folly/Android.mk'    include 'folly-deprecate-dynamic-initializer/folly/**/*', 'Android.mk'    eachFile {fname -> fname.path = (fname.path - "folly-deprecate-dynamic-initializer/")}    includeEmptyDirs = false    into "$thirdPartyNdkDir/folly"}//task downloadGlog(dependsOn: createNativeDepsDirectories, type: Download) {//    src 'https://github.com/google/glog/archive/v0.3.3.tar.gz'//    onlyIfNewer true//    overwrite false//    dest new File(downloadsDir, 'glog-0.3.3.tar.gz')//}// Prepare glog sources to be compiled, this task will perform steps that normally shoudl've been// executed by automake. This way we can avoid dependencies on make/automaketask prepareGlog( type: Copy) {    from 'build/downloads/'    from 'src/main/jni/third-party/glog/'    include 'glog-0.3.3/src/**/*', 'Android.mk', 'config.h'    includeEmptyDirs = false    filesMatching('**/*.h.in') {        filter(ReplaceTokens, tokens: [                ac_cv_have_unistd_h: '1',                ac_cv_have_stdint_h: '1',                ac_cv_have_systypes_h: '1',                ac_cv_have_inttypes_h: '1',                ac_cv_have_libgflags: '0',                ac_google_start_namespace: 'namespace google {',                ac_cv_have_uint16_t: '1',                ac_cv_have_u_int16_t: '1',                ac_cv_have___uint16: '0',                ac_google_end_namespace: '}',                ac_cv_have___builtin_expect: '1',                ac_google_namespace: 'google',                ac_cv___attribute___noinline: '__attribute__ ((noinline))',                ac_cv___attribute___noreturn: '__attribute__ ((noreturn))',                ac_cv___attribute___printf_4_5: '__attribute__((__format__ (__printf__, 4, 5)))'        ])        it.path = (it.name - '.in')    }    into "$thirdPartyNdkDir/glog"}task downloadJSCHeaders(type: Download) {    def jscAPIBaseURL = 'https://svn.webkit.org/repository/webkit/!svn/bc/174650/trunk/Source/JavaScriptCore/API/'    def jscHeaderFiles = ['JSBase.h', 'JSContextRef.h', 'JSObjectRef.h', 'JSRetainPtr.h', 'JSStringRef.h', 'JSValueRef.h', 'WebKitAvailability.h']    def output = new File(downloadsDir, 'jsc')    output.mkdirs()    src(jscHeaderFiles.collect { headerName -> "$jscAPIBaseURL$headerName" })    onlyIfNewer true    overwrite false    dest output}// Create Android.mk library module based on so files from mvn + include headers fetched from webkit.orgtask prepareJSC(dependsOn: downloadJSCHeaders) << {    copy {        from zipTree(configurations.compile.fileCollection { dep -> dep.name == 'android-jsc' }.singleFile)        from {downloadJSCHeaders.dest}        from 'src/main/jni/third-party/jsc/Android.mk'        include 'jni/**/*.so', '*.h', 'Android.mk'        filesMatching('*.h', { fname -> fname.path = "JavaScriptCore/${fname.path}"})        into "$thirdPartyNdkDir/jsc";    }}def getNdkBuildName() {    if (Os.isFamily(Os.FAMILY_WINDOWS)) {        return "ndk-build.cmd"    } else {        return "ndk-build"    }}def findNdkBuildFullPath() {    // we allow to provide full path to ndk-build tool    if (hasProperty('ndk.command')) {        return property('ndk.command')    }    // or just a path to the containing directory    if (hasProperty('ndk.path')) {        def ndkDir = property('ndk.path')        return new File(ndkDir, getNdkBuildName()).getAbsolutePath()    }    if (System.getenv('ANDROID_NDK') != null) {        def ndkDir = System.getenv('ANDROID_NDK')        return new File(ndkDir, getNdkBuildName()).getAbsolutePath()    }    def ndkDir = android.hasProperty('plugin') ? android.plugin.ndkFolder :            plugins.getPlugin('com.android.library').sdkHandler.getNdkFolder()    if (ndkDir) {        return new File(ndkDir, getNdkBuildName()).getAbsolutePath()    }    return null}def getNdkBuildFullPath() {    def ndkBuildFullPath = findNdkBuildFullPath()    if (ndkBuildFullPath == null) {        throw new GradleScriptException(            "ndk-build binary cannot be found, check if you've set " +            "\$ANDROID_NDK environment variable correctly or if ndk.dir is " +            "setup in local.properties",            null)    }    if (!new File(ndkBuildFullPath).canExecute()) {        throw new GradleScriptException(            "ndk-build binary " + ndkBuildFullPath + " doesn't exist or isn't executable.\n" +            "Check that the \$ANDROID_NDK environment variable, or ndk.dir in local.proerties, is set correctly.\n" +            "(On Windows, make sure you escape backslashes in local.properties or use forward slashes, e.g. C:\\\\ndk or C:/ndk rather than C:\\ndk)",            null)    }    return ndkBuildFullPath}task buildReactNdkLib(dependsOn: [prepareJSC, prepareBoost, prepareDoubleConversion, prepareFolly, prepareGlog], type: Exec) {    inputs.file('src/main/jni/react')    outputs.dir("$buildDir/react-ndk/all")    commandLine getNdkBuildFullPath(),            'NDK_PROJECT_PATH=null',            "NDK_APPLICATION_MK=$projectDir/src/main/jni/Application.mk",            'NDK_OUT=' + temporaryDir,            "NDK_LIBS_OUT=$buildDir/react-ndk/all",            "THIRD_PARTY_NDK_DIR=$buildDir/third-party-ndk",            '-C', file('src/main/jni/react/jni').absolutePath,            '--jobs', project.hasProperty("jobs") ? project.property("jobs") : Runtime.runtime.availableProcessors()}task cleanReactNdkLib(type: Exec) {    commandLine getNdkBuildFullPath(),            '-C', file('src/main/jni/react/jni').absolutePath,            'clean'}task packageReactNdkLibs(dependsOn: buildReactNdkLib, type: Copy) {    from "$buildDir/react-ndk/all"    exclude '**/libjsc.so'    into "$buildDir/react-ndk/exported"}task packageReactNdkLibsForBuck(dependsOn: packageReactNdkLibs, type: Copy) {  from "$buildDir/react-ndk/exported"  into "src/main/jni/prebuilt/lib"}android {    compileSdkVersion 23    buildToolsVersion "23.0.1"    defaultConfig {        minSdkVersion 16        targetSdkVersion 22        versionCode 1        versionName "1.0"        ndk {            moduleName "reactnativejni"        }        buildConfigField 'boolean', 'IS_INTERNAL_BUILD', 'false'        testApplicationId "com.facebook.react.tests.gradle"        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"    }    sourceSets.main {        jni.srcDirs = []        jniLibs.srcDir "$buildDir/react-ndk/exported"        res.srcDirs = ['src/main/res/devsupport', 'src/main/res/shell', 'src/main/res/views/modal']        java {          srcDirs = ['src/main/java', 'src/main/libraries/soloader']          exclude 'com/facebook/react/processing'        }    }    tasks.withType(JavaCompile) {        compileTask -> compileTask.dependsOn packageReactNdkLibs    }    clean.dependsOn cleanReactNdkLib    lintOptions {        abortOnError false    }}dependencies {    compile fileTree(dir: 'src/main/third-party/java/infer-annotations/', include: ['*.jar'])    compile 'com.android.support:appcompat-v7:23.0.1'    compile 'com.android.support:recyclerview-v7:23.0.1'    compile 'com.facebook.fresco:fresco:0.8.1'    compile 'com.facebook.fresco:imagepipeline-okhttp:0.8.1'    compile 'com.facebook.stetho:stetho:1.2.0'    compile 'com.facebook.stetho:stetho-okhttp:1.2.0'    compile 'com.fasterxml.jackson.core:jackson-core:2.2.3'    compile 'com.google.code.findbugs:jsr305:3.0.0'    compile 'com.squareup.okhttp:okhttp:2.5.0'    compile 'com.squareup.okhttp:okhttp-ws:2.5.0'    compile 'com.squareup.okio:okio:1.6.0'    compile 'org.webkit:android-jsc:r174650'    testCompile "junit:junit:${JUNIT_VERSION}"    testCompile "org.powermock:powermock-api-mockito:${POWERMOCK_VERSION}"    testCompile 'com.fasterxml.jackson.core:jackson-databind:2.2.3'    testCompile "org.powermock:powermock-module-junit4-rule:${POWERMOCK_VERSION}"    testCompile "org.powermock:powermock-classloading-xstream:${POWERMOCK_VERSION}"    testCompile "org.mockito:mockito-core:${MOCKITO_CORE_VERSION}"    testCompile "org.easytesting:fest-assert-core:${FEST_ASSERT_CORE_VERSION}"    testCompile "org.robolectric:robolectric:${ROBOLECTRIC_VERSION}"    androidTestCompile "com.android.support.test:testing-support-lib:0.1"}apply from: 'release.gradle'

去掉了那些下载，因为我们已经下载好，扔进去。至于那些怎么下载，大家就自己自行想办法吧，反正一个个下载。

然后可以编译了。注意ndk版本，在local.properties文件里面设定：

ndk.dir=/Users/zengjinlong/workplace/android-ndk-r10bsdk.dir=/Users/zengjinlong/workplace/android-sdk-macosx

OK，跑起来。

然后，在项目的顶层，npm start 。

注意，我们并没有将ReactAndroid 装载到node_module里面。因为这样容易出问题，所以这也是跟官网差异的一个地方。就是，工程依赖是通过源码。但是npm start的，其实是node_module里面的，也就是0.22.2

好，今天就到这里。有什么不懂的，可以来问我。

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微信：micall123

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