siebenhaarmi76624/MDT5_1_Ueberwachungssystem_G1
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merge Kommunikation Version 1.2 UDP Socket

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This commit is contained in:
Miguel Siebenhaar 2023-06-15 16:56:21 +02:00
parent 11dbcd0362
commit 6ec0b175e4
3 changed files with 152 additions and 4 deletions
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4
app/src/main/AndroidManifest.xml
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@ -5,6 +5,10 @@
<uses-feature android:name="android.hardware.camera"/>
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:dataExtractionRules="@xml/data_extraction_rules"

21
app/src/main/java/com/example/ueberwachungssystem/MainActivity.java
View File

@ -6,9 +6,22 @@ import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
WifiCommunication communication;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
protected void onResume() {
super.onResume();
communication = new WifiCommunication(MainActivity.this, 1234);
}
}
@Override
protected void onPause() {
super.onPause();
communication.stopCommunication();
}
}

131
app/src/main/java/com/example/ueberwachungssystem/WifiCommunication.java Normal file
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@ -0,0 +1,131 @@
package com.example.ueberwachungssystem;
import android.annotation.SuppressLint;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Enumeration;
public class WifiCommunication {
private final MainActivity mainActivity;
private final InetAddress address;
private final int port;
private String messageToSend;
volatile private boolean send;
private final DatagramSocket socket;
volatile private boolean running;
@SuppressLint("SetTextI18n")
public WifiCommunication(MainActivity mainActivity, int port) {
this.mainActivity = mainActivity;
this.port = port;
try {
socket = new DatagramSocket(this.port);
socket.setBroadcast(true);
address = InetAddress.getByName("255.255.255.255"); //100.82.255.255
running = true;
send = false;
new ReceiveThread().start();
new SendThread().start();
} catch (SocketException | UnknownHostException e) {
throw new RuntimeException(e);
}
mainActivity.runOnUiThread(() -> mainActivity.tvMessages.setText("Communication running"));
}
private class ReceiveThread extends Thread {
private StringBuffer rxStringBuffer = new StringBuffer();
private String rxString="";
private String previousRxString = "";
@Override
public void run() {
try {
do {
byte[] receiveData = new byte[512];
InetAddress fromAdress;
int fromPort;
DatagramPacket rxPacket = new DatagramPacket(receiveData, receiveData.length);
socket.receive(rxPacket);
fromAdress = rxPacket.getAddress();
fromPort = rxPacket.getPort();
rxString = new String(rxPacket.getData());
if(!previousRxString.equals(rxString)) {
rxStringBuffer.append(rxString).append("\n");
mainActivity.runOnUiThread(() -> mainActivity.tvMessages.setText(rxStringBuffer));
previousRxString = rxString;
}
} while (running);
}
catch (IOException e) {
e.printStackTrace();
}
}
}
private class SendThread extends Thread {
private int tmpCnt = 0;
@Override
public void run() {
try {
do {
if(send)
{
send = false;
SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");
Date curDate = new Date(System.currentTimeMillis());
String str = formatter.format(curDate);
byte[] send_Data = new byte[512];
String txString = (str+ ",Gruppe2," + getLocalIpAddress() + ",An,Video," +messageToSend);
send_Data = txString.getBytes();
DatagramPacket txPacket = new DatagramPacket(send_Data, txString.length(), address, port);
for(int i = 0; i < 500; i++) {
socket.send(txPacket);
/*try{
sleep(10);
}catch (InterruptedException e){
e.printStackTrace();
}*/
}
}
} while (running);
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static String getLocalIpAddress() {
try {
for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
NetworkInterface networkInterface = (NetworkInterface) ((Enumeration<?>) en).nextElement();
for (Enumeration<InetAddress> addresses = networkInterface.getInetAddresses(); addresses.hasMoreElements();) {
InetAddress inetAddress = addresses.nextElement();
if (!inetAddress.isLoopbackAddress() && inetAddress instanceof Inet4Address) {
return inetAddress.getHostAddress();
}
}
}
} catch (SocketException ex) {
ex.printStackTrace();
}
return null;
}
public void sendTrue(String message){
send = true;
messageToSend = message;
}
public void stopCommunication() {
running = false;
socket.close();
}
}