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react-native run-android報(bào)錯(cuò)，求助

D:\project\React\React?Native\FirstApp>react-native?run-android
Scanning?folders?for?symlinks?in?D:\project\React\React?Native\FirstApp\node_modules?(21ms)
Starting?JS?server...
Building?and?installing?the?app?on?the?device?(cd?android?&&?gradlew.bat?installDebug)...
錯(cuò)誤:?找不到或無法加載主類?org.gradle.wrapper.GradleWrapperMain
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

模擬器已開，問下大家這個(gè)問題怎么解決

不悔有你ii

2017-12-21

源自：ReactNative入門與進(jìn)階

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三生池畔
2018-01-10

我遇到的情況是在android/gradle/wrapper文件夾下的gradle-wrapper.jar大小為0KB，其原因應(yīng)該是在創(chuàng)建項(xiàng)目時(shí)，未創(chuàng)建完成就運(yùn)行了程序，解決辦法是刪掉原項(xiàng)目重新創(chuàng)建，耐心等待，等創(chuàng)建完成后在運(yùn)行