運行react-native run-android 報錯：

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

錯誤原因：
android/gradlew 沒有執(zhí)行權限

解決辦法：

給gradlew 添加可執(zhí)行權限
chmod +x android/gradlew

再次運行react-native run-android 可以正常安裝程序