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Android™

Send a String over a Socket

See more Socket/SSL/TLS Examples

Demonstrates Socket.SendString, which encodes a string using StringCharset and sends the resulting bytes over the connected socket. No delimiter, terminator, or length prefix is added.

Background. Text send and receive operations encode and decode bytes using the StringCharset property. For plain ASCII or UTF-8 protocols, setting StringCharset to utf-8 is a safe default.

Chilkat Android™ Downloads

Android™
// 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);

    boolean success = false;

    CkSocket socket = new CkSocket();

    //  Connect to the server using TLS.  The 3rd argument enables the TLS handshake after the TCP
    //  connection succeeds; the 4th is the maximum time to wait, in milliseconds.
    boolean bTls = true;
    int maxWaitMs = 5000;
    success = socket.Connect("example.com",5000,bTls,maxWaitMs);
    if (success == false) {
        Log.i(TAG, socket.lastErrorText());
        return;
        }

    //  StringCharset controls the character encoding used when sending and receiving text.
    socket.put_StringCharset("utf-8");

    //  Encode the string using StringCharset and send the resulting bytes.  No delimiter, terminator, or
    //  length prefix is added; the exact bytes are sent.  This example sends a command for a simple
    //  application-defined text protocol.
    String message = "STATUS\r\n";
    success = socket.SendString(message);
    if (success == false) {
        Log.i(TAG, socket.lastErrorText());
        return;
        }

    Log.i(TAG, "Message sent.");

  }

  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."
  }
}