Android receive and send data via Wi-Fi connection with equipment

Question

Actually, I want to send data from the hardware to the Android device. The hardware device connects to a local wireless router that is connected to the modem. An Android device will also be connected to the same router via WIFI. Can you offer some links or tutorials from where I can get an idea of ​​how to establish a connection between a hardware device and an Android device to send and receive data via WI-FI. Please help with any sample code or links.

Answer 1

import java.io.BufferedInputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.OutputStream; import java.net.Socket; import java.net.UnknownHostException; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; public class SimpleClientActivity extends Activity { private Socket client; private FileInputStream fileInputStream; private BufferedInputStream bufferedInputStream; private OutputStream outputStream; private Button button; private TextView text; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); button = (Button) findViewById(R.id.button1); //reference to the send button text = (TextView) findViewById(R.id.textView1); //reference to the text view //Button press event listener button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { File file = new File("/mnt/sdcard/input.jpg"); //create file instance, file to transfer or any data try { client = new Socket("10.0.2.2", 4444);// ip address and port number of ur hardware device byte[] mybytearray = new byte[(int) file.length()]; //create a byte array to file fileInputStream = new FileInputStream(file); bufferedInputStream = new BufferedInputStream(fileInputStream); bufferedInputStream.read(mybytearray, 0, mybytearray.length); //read the file outputStream = client.getOutputStream(); outputStream.write(mybytearray, 0, mybytearray.length); //write file to the output stream byte by byte outputStream.flush(); bufferedInputStream.close(); outputStream.close(); client.close(); text.setText("File Sent"); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }); } } 

// you can also use the code below to send the message u

  public static String ipAddress;// ur ip public static int portNumber;// portnumber private Socket client; private OutputStreamWriter printwriter; private String message; new Thread(new Runnable() { @Override public void run() { // TODO Auto-generated method stub try { client = new Socket(ipAddress, portNumber); printwriter = new OutputStreamWriter(client .getOutputStream(), "ISO-8859-1"); printwriter.write("any message"); printwriter.flush(); printwriter.close(); client.close(); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }).start(); 

Answer 2

I came through an API in an android called NSD (Network Service Discovery), whether it would be useful to determine h / w connected via Wi-Fi and send commands to it ... Suggest on this