SocketException：连接被拒绝（操作系统错误：连接被拒绝，errno = 111），地址 = localhost，端口 = 44382

Question

This error is getting while using HTTP GET method

Answer 1

This happens because the localhost (or 127.0.0.1 ) on the device is only accessible to the device itself.

Solution 1 (Android only)

You can reverse-proxy a localhost port to the Android device/emulator running adb reverse on the command prompt like so:

adb reverse tcp:5000 tcp:5000

Solution 2

Use the machine's IP address where the DB is running. Also, the DB should be listening to the IP 0.0.0.0 to be accessible outside the localhost .

Supposing the DB machine's IP is 192.168.1.123 it's going to be something like:

Future db() async {
  print('@');
  final conn = await MySQLConnection.createConnection(
    host: '192.168.1.123',   // <- Here
    port: 3306,
    userName: 'root',
    password: '',
    databaseName: 'flutter', // optional
  );
  print('^');
}

Just take care because changing the DB to listen to 0.0.0.0 is a security risk as the DB is going to be accessible to the outside world.