(Android™) Accept Connection on Socket

Demonstrates how to create a TCP/IP socket, listen on a port, accept an incoming connection, and send a "Hello World" message to the client.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSocket listenSocket = new CkSocket();

    // Bind to a port and listen for incoming connections:
    // This example will listen at port 5555 and allows for a backlog
    // of 25 pending connection requests.
    boolean success = listenSocket.BindAndListen(5555,25);
    if (success != true) {
        Log.i(TAG, listenSocket.lastErrorText());
        return;
        }

    // Get the next incoming connection
    // Wait a maximum of 20 seconds (20000 millisec)
    CkSocket connectedSocket;
    connectedSocket = listenSocket.AcceptNextConnection(20000);
    if (listenSocket.get_LastMethodSuccess() == false) {
        Log.i(TAG, listenSocket.lastErrorText());
        return;
        }

    // Set maximum timeouts for reading an writing (in millisec)
    connectedSocket.put_MaxReadIdleMs(10000);
    connectedSocket.put_MaxSendIdleMs(10000);

    // Send a "Hello World!" message to the client:
    success = connectedSocket.SendString("Hello World!");
    if (success != true) {
        Log.i(TAG, connectedSocket.lastErrorText());

        return;
        }

    // Close the connection with the client.
    // Wait a max of 20 seconds (20000 millsec)
    success = connectedSocket.Close(20000);

    Log.i(TAG, "success!");

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}