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:
解决：
root@gmw-PC:/home/gmw/Desktop/app# cd android/
root@gmw-PC:/home/gmw/Desktop/app/android# chmod 777 gradlew
**粗体** _斜体_ [链接](http://example.com) `代码` - 列表 > 引用。你还可以使用@来通知其他用户。