Socket is not closed on Android

I wrote a simple TCP client class in Java. It is used to connect to a TCP server written in Python and process incoming messages in a new thread. It looks like this:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetSocketAddress;
import java.net.Socket;

public class TCPTestClient {
    private String mHost;
    private int mPort;

    private Socket mSocket;
    private PrintWriter mWriter;
    private BufferedReader mReader;

    public TCPTestClient(String host, int port) {
        mHost = host;
        mPort = port;
    }

    public void connect() throws IOException {
        if (mSocket == null || mSocket.isClosed()) {
            mSocket = new Socket();
            mSocket.connect(new InetSocketAddress(mHost, mPort), 5000);
            mWriter = new PrintWriter(mSocket.getOutputStream());
            mReader = new BufferedReader(new InputStreamReader(mSocket
                    .getInputStream()));
            new Thread(new InputHandler(mReader, this)).start();
        }
    }

    public void close() throws IOException {
        if (mSocket != null && !mSocket.isClosed()) {
            mSocket.close();
        }
    }

    class InputHandler implements Runnable {
        BufferedReader mReader;
        TCPTestClient mClient;

        public InputHandler(BufferedReader reader, TCPTestClient client) {
            mReader = reader;
            mClient = client;
        }

        public void run() {
            String line = null;
            try {
                while ((line = mReader.readLine()) != null) {
                    System.out.println(line);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

The TCP server simply outputs “connected client” and “client disconnected” to standard output if a new client is connected or disconnected. This works fine when starting TCPTestClient in a regular java application: the connection is established when connect () is called and it closes when the close () function is called, and the wait for readLine () inside the InputHandler will fail due to a SocketException that says the socket was closed ( java.net.SocketException: Socket closed). This is the behavior I was expecting.

Android, : readLine() - , SocketException, " ".

:

import java.io.IOException;

import android.app.Activity;
import android.util.Log;

public class Foo extends Activity {
    private TCPTestClient mClient;

    private static final String TAG = "Foo";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.foo);

        mClient = new TCPTestClient("192.168.1.2", 3456);
    }

    @Override
    protected void onPause() {
        super.onPause();
        Log.d(TAG, "onPause");

        try {
            mClient.close();
        } catch (IOException e) {
            Log.d(TAG, "Disconnect failed", e);
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.d(TAG, "onResume");

        try {
            mClient.connect();
        } catch (IOException e) {
            Log.d(TAG, "Connect failed", e);
        }
    }
}

, /, . "", . onPause() close(), , BufferedReader . mReader.close() .

- , , , ?