D:\ReactNative\App>react-native run-android

Scanning 556 folders for symlinks in D:\ReactNative\App\node_modules (28ms)

Starting JS server...

Building and installing the app on the device (cd android && gradlew.bat installDebug)...

ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.

Please set the JAVA_HOME variable in your environment to match the

location of your Java installation.

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

events.js:160

      throw er; // Unhandled 'error' event

      ^

Error: spawn cmd.exe ENOENT

    at exports._errnoException (util.js:1020:11)

    at Process.ChildProcess._handle.onexit (internal/child_process.js:193:32)

    at onErrorNT (internal/child_process.js:367:16)

    at _combinedTickCallback (internal/process/next_tick.js:80:11)

    at process._tickCallback (internal/process/next_tick.js:104:9)