(Android™) Async Accept Socket Connection

Demonstrates how to get the connected client socket after accepting a connection asynchronously.

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 assumes the Chilkat Socket API to have been previously unlocked.
    // See Socket Unlock Sample for sample code.

    CkSocket listenSocket = new CkSocket();

    // Bind to a port and listen.
    // 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;
        }

    // Start a background task to accept an incoming connection ...
    int maxWaitMs = 20000;
    CkTask acceptTask = listenSocket.AcceptNextConnectionAsync(maxWaitMs);
    acceptTask.Run();

    // ...
    // ...
    // ...

    // Imagine at this point the task has completed successfully,
    // and a connection was accepted.  Here's how to get the connected socket...
    CkSocket connectedClient = new CkSocket();
    success = connectedClient.LoadTaskResult(acceptTask);

    // Here's how it works:  The AcceptNextConnection method would normally
    // return a socket object when called synchronously.  When called asynchronously,
    // it cannot do so because it returns the task object.  When the async method
    // (running in a background thread) completes, the socket object that is the client
    // connection is contained within the task object.
    // 
    // This can be generalized for any case where a Chilkat method returns an object.
    // The async version of that method is such that the object returned in the background
    // thread is contained within the task object.

    // To get the result object, we create a new object instance of that type.
    // In this case, we create a socket object (connectedClient).  There is a LoadTaskResult
    // method in all Chilkat classes that can be a return value of an async method call.
    // The LoadTaskResult method transfers the returned object from the task to the caller.

  }

  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."
  }
}