Kommunikation Version 1.6 UDP Socket

app/build.gradle

@@ -26,6 +26,9 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+    buildFeatures {
+        viewBinding true
+    }
 }
 
 dependencies {
@@ -33,6 +36,7 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.6.1'
     implementation 'com.google.android.material:material:1.8.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    implementation 'com.google.android.gms:play-services-nearby:18.0.0'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.5'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'

app/src/main/AndroidManifest.xml

@@ -2,18 +2,26 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <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" />
+    <uses-permission android:name="android.permission.CAMERA" /> <!-- §permissionCamera§ -->
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Ueberwachungssystem"
         tools:targetApi="31">
         <activity
             android:name=".MainActivity"
-            android:exported="true">
+            android:exported="true"
+            android:label="Ueberwachungsapp">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/java/com/example/ueberwachungssystem/MainActivity.java

@@ -1,15 +1,103 @@
 package com.example.ueberwachungssystem;
 
-import androidx.appcompat.app.AppCompatActivity;
+import android.annotation.SuppressLint;
-
+import android.net.wifi.WifiInfo;
+import android.net.wifi.WifiManager;
 import android.os.Bundle;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.Toast;
 
+import androidx.appcompat.app.AppCompatActivity;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+@SuppressLint("SetTextI18n")
 public class MainActivity extends AppCompatActivity {
+    TextView tvMessages;
+    TextView tvConnectionInfos;
+    WifiCommunication communication;
+    PermissionRequest permission;
+    public static String SERVER_IP = "";
+    public static final int SERVER_PORT = 1234;
+    //private static final int PERMISSION_REQUEST_CODE = 123;
+    float i=0;
+
+    boolean communicationRunning = false;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
-        //
+        tvMessages = findViewById(R.id.tvMessages);
+        tvConnectionInfos = findViewById(R.id.tvConnectionInfos);
+        try {
+            SERVER_IP = getLocalIpAddress();
+            tvConnectionInfos.setText("Connection Infos: \n Own IP-Adress: " + SERVER_IP+ " Port: " + SERVER_PORT);
+        } catch (UnknownHostException e) {
+            e.printStackTrace();
+        }
+        Button btnSend = findViewById(R.id.btnSend);
+        btnSend.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                i++;
+                communication.sendTrue(String.valueOf(i));
+            }
+        });
     }
-}
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.options_menu, menu);
+        return true;
+    }
+    public boolean onOptionsItemSelected(MenuItem item) {
+        Toast.makeText(this, "Selected Item: " +item.getTitle(), Toast.LENGTH_SHORT).show();
+        PopUpClass popUpClass;
+        switch (item.getItemId()) {
+            case R.id.Rechteverwaltung:
+                popUpClass = new PopUpClass(MainActivity.this);
+                popUpClass.showPopupWindow(tvMessages);
+                popUpClass.RechtePrüfen();
+                return true;
+            case R.id.Sensoren:
+                popUpClass = new PopUpClass(MainActivity.this);
+                popUpClass.showPopupWindow(tvMessages);
+                popUpClass.Sensoren();
+                return true;
+            case R.id.Impressum:
+                popUpClass = new PopUpClass(MainActivity.this);
+                popUpClass.showPopupWindow(tvMessages);
+                popUpClass.Impressum();
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+
+    protected void onResume() {
+        super.onResume();
+        if (!communicationRunning){
+            communication = new WifiCommunication(MainActivity.this, SERVER_PORT);
+            communicationRunning = true;
+        }
+        permission = new PermissionRequest(MainActivity.this);
+        permission.rechtePruefen();
+    }
+    @Override
+    protected void onPause() {
+        super.onPause();
+        communication.stopCommunication();
+    }
+    private String getLocalIpAddress() throws UnknownHostException {
+        WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);
+        assert wifiManager != null;
+        WifiInfo wifiInfo = wifiManager.getConnectionInfo();
+        int ipInt = wifiInfo.getIpAddress();
+        return InetAddress.getByAddress(ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN).putInt(ipInt).array()).getHostAddress();
+    }
+}

app/src/main/java/com/example/ueberwachungssystem/PermissionRequest.java

@@ -0,0 +1,48 @@
+package com.example.ueberwachungssystem;
+
+import static android.Manifest.permission.INTERNET;
+import static android.Manifest.permission.CAMERA;
+import static android.Manifest.permission.RECORD_AUDIO;
+
+import android.content.pm.PackageManager;
+import android.os.Handler;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.content.ContextCompat;
+
+public class PermissionRequest extends AppCompatActivity{
+    private static final int PERMISSION_REQUEST_CODE = 123;
+    private final MainActivity mainActivity;
+
+    Handler handler = new Handler();
+
+    public PermissionRequest(MainActivity mainActivity) {
+        this.mainActivity = mainActivity;
+    }
+
+    public StringBuilder rechtePruefen() {
+        boolean rechtKamera = ContextCompat.checkSelfPermission(mainActivity, CAMERA) == PackageManager.PERMISSION_GRANTED;
+        boolean rechtMikrofon = ContextCompat.checkSelfPermission(mainActivity, RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED;
+        boolean rechtInternet = ContextCompat.checkSelfPermission(mainActivity, INTERNET) == PackageManager.PERMISSION_GRANTED;
+        StringBuilder sb = new StringBuilder();
+        sb.append("Rechte prüfen:")
+                .append("\nKamera: ").append(rechtKamera)
+                .append("\nMikrofon: ").append(rechtMikrofon)
+                .append("\nInternet: ").append(rechtInternet);
+        //mainActivity.runOnUiThread(() -> mainActivity.tvMessages.setText(sb));
+        if (!(rechtKamera && rechtMikrofon && rechtInternet)){
+            handler.post(new Runnable() {
+                @Override
+                public void run() {
+                    Toast.makeText(mainActivity.getApplicationContext(),"Es werden Rechte benötigt", Toast.LENGTH_LONG).show();
+                }
+            });
+        }
+        return sb;
+    }
+
+    public void rechteAnfordern() {
+        mainActivity.requestPermissions(new String[]{CAMERA, RECORD_AUDIO, INTERNET}, PERMISSION_REQUEST_CODE);
+    }
+}

app/src/main/java/com/example/ueberwachungssystem/PopUpClass.java

@@ -0,0 +1,86 @@
+package com.example.ueberwachungssystem;
+
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.MotionEvent;
+import android.view.View;
+import android.widget.Button;
+import android.widget.LinearLayout;
+import android.widget.PopupWindow;
+import android.widget.TextView;
+
+public class PopUpClass {
+    private final MainActivity mainActivity;
+
+    PermissionRequest permission;
+    TextView PopUpText;
+
+
+    public PopUpClass(MainActivity mainActivity) {
+        this.mainActivity = mainActivity;
+        permission = new PermissionRequest(mainActivity);
+    }
+
+    //PopupWindow display method
+
+    public void showPopupWindow(final View view) {
+
+
+        //Create a View object yourself through inflater
+        LayoutInflater inflater = (LayoutInflater) view.getContext().getSystemService(view.getContext().LAYOUT_INFLATER_SERVICE);
+        View popupView = inflater.inflate(R.layout.popup_window, null);
+
+        //Specify the length and width through constants
+        int width = LinearLayout.LayoutParams.WRAP_CONTENT;
+        int height = LinearLayout.LayoutParams.WRAP_CONTENT;
+
+        //Make Inactive Items Outside Of PopupWindow
+        boolean focusable = true;
+
+        //Create a window with our parameters
+        final PopupWindow popupWindow = new PopupWindow(popupView,width*1, height*1, focusable);
+
+        //Set the location of the window on the screen
+        popupWindow.showAtLocation(view, Gravity.CENTER, 0, 0);
+
+        //Initialize the elements of our window, install the handler
+
+        PopUpText = popupView.findViewById(R.id.titleText);
+
+        Button buttonEdit = popupView.findViewById(R.id.RechteAnfordern);
+        buttonEdit.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                RechteAnfordern();
+            }
+        });
+
+        //Handler for clicking on the inactive zone of the window
+
+        popupView.setOnTouchListener(new View.OnTouchListener() {
+            @Override
+            public boolean onTouch(View v, MotionEvent event) {
+
+                //Close the window when clicked
+                popupWindow.dismiss();
+                return true;
+            }
+        });
+    }
+    public void RechtePrüfen(){
+        StringBuilder Text = permission.rechtePruefen();
+        PopUpText.setText(Text);
+    }
+    public void RechteAnfordern(){
+        permission.rechteAnfordern();
+        StringBuilder Text = permission.rechtePruefen();
+        PopUpText.setText(Text);
+    }
+    public void Sensoren(){
+        PopUpText.setText("Es können 3 verschiedene Sensoren verwendet werden \n -1. Beschleunigungssensor\n -2. Mikrofon\n -3. Kamera");
+    }
+    public void Impressum(){
+        PopUpText.setText("Die Ueberwachungsapp wurde im Rahmen eines Praktikums der TH-Nürnberg programmiert");
+    }
+
+}

app/src/main/java/com/example/ueberwachungssystem/WifiCommunication.java

@@ -0,0 +1,124 @@
+package com.example.ueberwachungssystem;
+import android.annotation.SuppressLint;
+import android.widget.Toast;
+
+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);
+        }
+        Toast.makeText(mainActivity.getApplicationContext(),"Communication running", Toast.LENGTH_SHORT).show();
+
+        //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];
+                    DatagramPacket rxPacket = new DatagramPacket(receiveData, receiveData.length);
+                    socket.receive(rxPacket);
+                    rxString = new String(rxPacket.getData());
+                    String[] splitrxString = rxString.split(",");
+                    if(!previousRxString.equals(rxString) && splitrxString[0].equals("1") && splitrxString.length==7) {
+                        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 = ("1," +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);
+                        }
+                    }
+                } 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();
+    }
+}

app/src/main/res/layout/activity_main.xml

@@ -1,18 +1,37 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version = "1.0" encoding = "utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout xmlns:android = "http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools = "http://schemas.android.com/tools"
-    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width = "match_parent"
-    android:layout_width="match_parent"
+    android:layout_height = "match_parent"
-    android:layout_height="match_parent"
+    android:layout_margin = "16dp"
-    tools:context=".MainActivity">
+    tools:context = ".MainActivity">
-
     <TextView
+        android:id = "@+id/tvConnectionInfos"
+        android:layout_width = "match_parent"
+        android:layout_height = "wrap_content"
+        android:inputType = "textMultiLine"
+        android:hint="ConnectionInfos"
+        android:textAppearance = "@style/Base.TextAppearance.AppCompat.Medium" />
+
+    <Button
+        android:id="@+id/btnSend"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Hello World!"
+        android:layout_below="@id/scrollView"
-        app:layout_constraintBottom_toBottomOf="parent"
+        android:layout_centerHorizontal="true"
-        app:layout_constraintEnd_toEndOf="parent"
+        android:text="SEND" />
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+    <ScrollView
+        android:id="@+id/scrollView"
+        android:layout_width="match_parent"
+        android:layout_below="@id/tvConnectionInfos"
+        android:layout_height="300dp">
+        <TextView
+            android:id = "@+id/tvMessages"
+            android:layout_width = "match_parent"
+            android:layout_height = "wrap_content"
+            android:hint="Messages"
+            android:inputType = "textMultiLine"
+            android:textAppearance = "@style/Base.TextAppearance.AppCompat.Medium" />
+    </ScrollView>
+</RelativeLayout>

app/src/main/res/layout/popup_window.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:paddingLeft="10dp"
+    android:paddingRight="10dp"
+    android:gravity="center"
+    android:background="#A5ACB2">
+
+    <TextView
+        android:id="@+id/titleText"
+        android:layout_gravity="center"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="20sp"
+        android:textStyle="italic"
+        android:padding="10dp"/>
+
+    <Button
+        android:id="@+id/RechteAnfordern"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:text="Rechte Anfordern" />
+
+
+
+</LinearLayout>

app/src/main/res/menu/options_menu.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android" >
+    <item android:id="@+id/Rechteverwaltung"
+        android:title="Rechteverwaltung" />
+    <item android:id="@+id/Sensoren"
+        android:title="Sensoren" />
+    <item android:id="@+id/Impressum"
+        android:title="Impressum" />
+</menu>

settings.gradle

@@ -14,3 +14,4 @@ dependencyResolutionManagement {
 }
 rootProject.name = "Ueberwachungssystem"
 include ':app'
+include ':app'