ReactNative问题随记

想运行在真机上，在运行命令react-native run-android遇到错误如下：

Scanning 559 folders for symlinks in D:\AppData\Project\android\AwesomeProject\node_modules (46ms)
JS server already running.

Building and installing the app on the device (cd android && gradlew.bat installDebug)...
Exception in thread "main" java.lang.RuntimeException: Timeout of 120000 reached waiting for exclusive access to file: C:\Users\lipp\.gradle\wrapper\dists\gradle-2.14.1-all\8bnwg5hd3w55iofp58khbp6yv\gradle-2.14.1-all.zip
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:61)
at org.gradle.wrapper.Install.createDist(Install.java:46)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:126)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
Could not install the app on the device, read the error above for details.
Make sure you have an Android emulator running or a device connected and have
set up your Android development environment:
https://facebook.github.io/react-native/docs/android-setup.html

截图如下：

去路径上去找发现缺少文件，首次运行命令react-native run-android 会下载gradle编译器，虽然设置了但一直失败

解决方案：

1.直接去下：http://services.gradle.org/distributions/  找到文件对应版本的文件 gradle-2.14.1-all.zip 下载

打不开的可以去我网盘上下载：https://pan.baidu.com/s/1nvealoX  （gradle-2.14.1-all.zip）

下载后放到C:\Users\lipp\.gradle\wrapper\dists\gradle-2.14.1-all\8bnwg5hd3w55iofp58khbp6yv   下，然后右键该文件属性，看是否被锁定，如果锁定点击解除锁定

注意文件路径一般是：C:\Users\{你的账号}\.gradle\wrapper\dists\gradle-2.14.1-all\{随机文件夹}