Error: ADB exited with exit code

 Error: ADB exited with exit code 1
 adb: failed to install /FlutterProject/flutter_app_first/build/app/outputs/
 apk/app.apk:Failure [INSTALL_FAILED_INSUFFICIENT_STORAGE]
 Error launching application on Android SDK built for x86.

你的真机或者是模拟器没有足够的存储空间来安装应用程序时，就会出现此错误，建议你清理一下内存或者模拟器的储存空间，也可以把之前的模拟器删除掉，重新安装一下新的模拟器