Question

I’m trying to connect to a simple Java server on my computer (in the future a true server, but I’m just learning how to program with sockets first. When I try to connect, the application on the phone throws an IOException. However, on the emulator, it does NOT.

I do have:

< uses-permission android:name=”android.permission.INTERNET”/>

included in the manifest. And here’s the code block that’s executed when I hit open:

try {
  responseField.setText("Opening socket...");
  Socket socket = new Socket(getIP(),Integer.parseInt(getPort()));
  responseField.setText("Socket opened. Initializing out...");
  out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true);
  responseField.setText("Done. Initializing in...");
  in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
  responseField.setText("Done.");
} catch (NumberFormatException e1) {
  responseField.setText("NumberFormatException");
} catch (UnknownHostException e1) {
  responseField.setText("UnknownHostException");
} catch (IOException e1) {
  responseField.setText("IOException");
}

Answer 1

So it seems that a weak Wi-Fi signal is causing error. I tried to surf the web (Google, CNN, etc.) afterward, and I could not. So I will just have to test on the emulator for now, or in a stronger signal. Thanks