when react-native run-android error
问题描述:
我试着通过我的React Project运行react-native run-android。之后,我得到了如下错误。在cmd中when react-native run-android error
显示错误
C:\Users\ekkawit\Desktop\ReactNative\myapp>react-native run-android Scanning 557 folders for symlinks in C:\Users\ekkawit\Desktop\ReactNative\myapp\node_modules (15ms) Starting JS server... Building and installing the app on the device (cd android && gradlew.bat installDebug)... Error occurred during initialization of VM java/lang/NoClassDefFoundError: java/lang/Object 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
我安装了Android SDK和Android的设置家庭和路径环境变量成功。但我仍然遇到同样的错误。
我还在我的电脑上安装了用于创建虚拟android设备的Gennymotion。
答
您通常会遇到此错误,因为仿真程序未运行或没有连接设备。所以首先运行android模拟器,然后在项目文件夹中使用react-native run-android
。
答
尝试在CMD/PS /壳:
java -version
javac -version
除非javac返回错误,那么你就没有安装JDK的管理。尝试卸载您的jdk,现在与管理员