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最近想写个App,又觉得Native App 太无趣了Web App又没那么成熟然后发现了Facebook在9月发布的React Native比较新奇,所以决定捣鼓看看; React Native为Facebook开源的使用Javascript与React开发Android、IOS原生跨平台App,React也是Factbook开源的JS框架使用了虚拟DOM的概念,Factbook自己的应用如Groups也是基于React Native在国内也有淘宝iPad版本是哟个了React Native; React Native最早支持的是Mac,for Android windows的支持9月份才刚发布还存在不少坑;
基本环境安装
开发Android App当然首先要安装:JDK、Android SDK配置好JDk、SDK环境变量; 安装C++编译环境(可以选择Visual Studio 或mingw等),编译nodejs的C++模块会使用; 安装git、安装Node.js环境;
React-Native 安装
如果没有VPN最好设置npm镜像不然及其考验你的耐性npm config set registry https://registry.npm.taobao.org
安装 React-Nativenpm install -g react-native-cli
创建项目
进入你希望项目存放的工作目录,运行
react-native init HelloWorld
请耐性等待,第一次下载依赖会比较久;
运行packager
npm start或react-native start
查看 http://localhost:8081/index.android.bundle?platform=android 是否能打开; 启动模拟器,运行adb devices查看是否设备已连接上;保持packager开启,另外打开一个命令行窗口,然后在工程目录下运行
运行React Native
react-native run-android
异常:
A problem occurred configuring project ':app'.> Could not resolve all dependencies for configuration ':app:_debugCompile'.> Could not find com.android.support:appcompat-v7:23.1.1.
解决方案:安装Android Support Repository与Android Support Library
如没有VPN要耐性等待,gradle下载一些依赖。
运行成功
生成APK
进入项目目录进入Android目录,在命令行运行:
gradlew assembleRelease
在React-native 0.14.2版本的时候会存在两个坑,应该算是Bug;在https://github.com/danhanfry/react-native-windows-apk发现了解决方案;
坑 1:
A problem occurred starting process 'command 'react-native''
解决方案:进入项目目录》android目录》app目录打开react.gradle文件在文件头加入:import org.apache.tools.ant.taskdefs.condition.Os找到
commandLine "react-native", "bundle", "--platform", "android", "--dev", "true", "--entry-file", entryFile, "--bundle-output", jsBundleFileDebug, "--assets-dest", resourcesDirDebug
修改为:
if (Os.isFamily(Os.FAMILY_WINDOWS)) { commandLine "cmd", "/c", "react-native", "bundle", "--platform", "android", "--dev", "true", "--entry-file", entryFile, "--bundle-output", jsBundleFileDebug, "--assets-dest", resourcesDirDebug} else { commandLine "react-native", "bundle", "--platform", "android", "--dev", "true", "--entry-file", entryFile, "--bundle-output", jsBundleFileDebug, "--assets-dest", resourcesDirDebug}
找到:
commandLine "react-native", "bundle", "--platform", "android", "--dev", "false", "--entry-file", entryFile, "--bundle-output", jsBundleFileRelease, "--assets-dest", resourcesDirRelease
修改为:
if (Os.isFamily(Os.FAMILY_WINDOWS)) { commandLine "cmd","/c", "react-native", "bundle", "--platform", "android", "--dev", "false", "--entry-file", entryFile, "--bundle-output", jsBundleFileRelease, "--assets-dest", resourcesDirRelease} else { commandLine "react-native", "bundle", "--platform", "android", "--dev", "false", "--entry-file", entryFile, "--bundle-output", jsBundleFileRelease, "--assets-dest", resourcesDirRelease}
坑2:
Execution failed for task ':app:bundleReleaseJsAndAssets'. > Process 'command 'cmd'' finished with non-zero exit value 1
解决方案:在HelloWorld\node_modules\react-native\packager\react-packager\src\SocketInterface目录找到index.js文件在40行左右把:
const sockPath = path.join(tmpdir,'react-packager-' + hash.digest('hex') );
修改为:
let sockPath = path.join(tmpdir,'react-packager-' + hash.digest('hex'));if (process.platform==='win32'){sockPath = sockPath.replace(/^//, '')sockPath = sockPath.replace(///g, '-')sockPath = '\\.\pipe\' + sockPath}
生成成功后就可以在:android\app\build\outputs\apk目录下看到生成的apk;
(对于坑2,我的做法是删除node-modules重新npm install ,然后在进行打包!十分有效!)
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