当反应本地运行的Android误差时

Question

我试图通过我的React项目运行反应本地运行Android。之后，我遇到了以下错误。

在CMD中显示错误

C:UsersekkawitDesktopReactNativemyapp>react-native run-android  
Scanning 557 folders for symlinks in  
C:UsersekkawitDesktopReactNativemyappnode_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

我成功安装了Android SDK，并成功地将Android Home和Path Environmental变量设置了。但是我仍然遇到相同的错误。

我还在PC上安装了用于创建虚拟Android设备的Gennymotion。

Answer 1

您通常会出现此错误，因为模拟器未运行或没有连接设备。因此，首先运行Android模拟器，然后在项目文件夹中使用react-native run-android。

Answer 2

尝试在CMD/PS/Shell：

    java -version
    javac -version

如果Javac返回错误，则您不会安装JDK作为管理员。尝试卸载您的JDK，现在使用Admin