bluetoothsocket.connect（）在第二次运行时引发异常

Question

I created an Android app to connect to Arduino via bluetooth serial adapter, when I run the app it works fine the first time, after that the bluetoothsocket.connect() throws an exception, the code as follows:- socket connection:

mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid);
mBluetoothAdapter.cancelDiscovery();
mmSocket.connect();
// send data
mmSocket.close();

I don't know where is the problem

Answer 1

Problem solved, the problem was bluetoothsocket.close(); I should not call this function

Answer 2

仅在发送完所有数据且不再需要发送时才应关闭套接字，如果需要发送更多数据，请在重新连接之前重新配置套接字