Einbinden und Aufruf der Klasse WifiCommunication.java in Zusammenhang mit Eingabe, Sendebutton und Anzeige im Layout. Internet-Permission wurde dafür im Manifest eingetragen.

app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.example.greenwatch">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
@@ -9,24 +11,6 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.GreenWatch">
-        <activity
-            android:name=".ConnectionActivity"
-            android:exported="false" />
-        <activity
-            android:name=".VideodetectionAndAccelerometerActivity"
-            android:exported="false" />
-        <activity
-            android:name=".AudiodetectionAndAccelerometerActivity"
-            android:exported="false" />
-        <activity
-            android:name=".VideodetectionActivity"
-            android:exported="false" />
-        <activity
-            android:name=".AudiodetectionActivity"
-            android:exported="false" />
-        <activity
-            android:name=".AccelerometerActivity"
-            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true">

app/src/main/java/com/example/greenwatch/AccelerometerActivity.java

@@ -1,28 +0,0 @@
-package com.example.greenwatch;
-
-import androidx.appcompat.app.AppCompatActivity;
-
-import android.os.Bundle;
-import android.view.View;
-import android.widget.Button;
-
-public class AccelerometerActivity extends AppCompatActivity {
-
-    private Button backToMainActivityButton;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_accelerometer);
-
-        backToMainActivityButton = (Button) findViewById(R.id.accelerometerBackToMainActivity);
-
-        backToMainActivityButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                finish();
-            }
-        });
-    }
-
-}

app/src/main/java/com/example/greenwatch/AudiodetectionActivity.java

@@ -1,27 +0,0 @@
-package com.example.greenwatch;
-
-import androidx.appcompat.app.AppCompatActivity;
-
-import android.os.Bundle;
-import android.view.View;
-import android.widget.Button;
-
-public class AudiodetectionActivity extends AppCompatActivity {
-
-    private Button backToMainActivityButton;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_audiodetection);
-
-        backToMainActivityButton = (Button) findViewById(R.id.audiodetectorBackToMainActivity);
-
-        backToMainActivityButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                finish();
-            }
-        });
-    }
-}

app/src/main/java/com/example/greenwatch/AudiodetectionAndAccelerometerActivity.java

@@ -1,27 +0,0 @@
-package com.example.greenwatch;
-
-import androidx.appcompat.app.AppCompatActivity;
-
-import android.os.Bundle;
-import android.view.View;
-import android.widget.Button;
-
-public class AudiodetectionAndAccelerometerActivity extends AppCompatActivity {
-
-    private Button backToMainActivity;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_audiodetection_and_accelerometer);
-
-        backToMainActivity = (Button) findViewById(R.id.audiodetectionAndAccelerometerBackToMainActivity);
-
-        backToMainActivity.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                finish();
-            }
-        });
-    }
-}

app/src/main/java/com/example/greenwatch/ConnectionActivity.java

@@ -1,27 +0,0 @@
-package com.example.greenwatch;
-
-import androidx.appcompat.app.AppCompatActivity;
-
-import android.os.Bundle;
-import android.view.View;
-import android.widget.Button;
-
-public class ConnectionActivity extends AppCompatActivity {
-
-    private Button backToMainActivity;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_connection);
-
-        backToMainActivity = (Button) findViewById(R.id.connectionBackToMainActivity);
-
-        backToMainActivity.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                finish();
-            }
-        });
-    }
-}

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

@@ -2,91 +2,55 @@ package com.example.greenwatch;
 
 import androidx.appcompat.app.AppCompatActivity;
 
-import android.content.Intent;
+import android.annotation.SuppressLint;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.Button;
+import android.widget.EditText;
+import android.widget.TextView;
+import java.net.SocketException;
 
 public class MainActivity extends AppCompatActivity {
+    WifiCommunication communication; //Member WifiCommunication
+    TextView tvReceivedData; //Test Textview um empfangene Daten anzuzeigen -> Gegen finale Textview in der Anzeige austauschen
+    //ToDo: Falls finale Textview zum Anzeigen der Nachricht anders heißt, muss das in der Klasse WifiCommunication.java angepasst werden!
+    // Wo anpassen: Receive Thread, Zeile 58
+    private EditText etSendMessage; //Test Edittext um eine Nachricht zu senden -> gegen Nachricht von den Sensoren austauschen
+    private Button btnSend; //Test Sendebutton
 
-    private Button audiodetectionButton;
+    private String sendmsg = "default";
-    private Button videodetectionButton;
-    private Button accelerometerButton;
-    private Button audiodetectionAndAccelerometerButton;
-    private Button videodetectionAndAccelerometerButton;
-    private Button connectionButton;
 
+    @SuppressLint("MissingInflatedId")
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        audiodetectionButton = (Button) findViewById(R.id.audiodetectionButton);
+        xmlToJava(); //Funktionsaufruf, wo die Testbuttons etc angelegt sind
-        videodetectionButton = (Button) findViewById(R.id.videodetectionButton);
-        accelerometerButton = (Button) findViewById(R.id.accelerometerButton);
-        audiodetectionAndAccelerometerButton = (Button) findViewById(R.id.audiodetectionAndAccelerometerButton);
-        videodetectionAndAccelerometerButton = (Button) findViewById(R.id.videodetectionAndAccelerometerButton);
-        connectionButton = (Button) findViewById(R.id.connectionButton);
-        audiodetectionButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                openAudiodetectionActivity();
-            }
-        });
-        videodetectionButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                openVideodetectionActivity();
-            }
-        });
-        accelerometerButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                openAccelerometerActivity();
-            }
-        });
-        audiodetectionAndAccelerometerButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                openAudiodetectionAndAccelerometerActivity();
-            }
-        });
-        videodetectionAndAccelerometerButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                openVideodetectionAndAccelerometerActivity();
-            }
-        });
-        connectionButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                openConnectionActivity();
-            }
-        });
-    }
-    public void openAudiodetectionActivity(){
-        Intent intent = new Intent(this, AudiodetectionActivity.class);
-        startActivity(intent);
-    }
-    public void openVideodetectionActivity(){
-        Intent intent =  new Intent(this, VideodetectionActivity.class);
-        startActivity(intent);
-    }
-    public void openAccelerometerActivity(){
-        Intent intent = new Intent(this, AccelerometerActivity.class);
-        startActivity(intent);
-    }
-    public void openAudiodetectionAndAccelerometerActivity(){
-        Intent intent = new Intent(this, AudiodetectionAndAccelerometerActivity.class);
-        startActivity(intent);
-    }
-    public void openVideodetectionAndAccelerometerActivity(){
-        Intent intent = new Intent(this, VideodetectionAndAccelerometerActivity.class);
-        startActivity(intent);
-    }
-    public void openConnectionActivity(){
-        Intent intent = new Intent(this, ConnectionActivity.class);
-        startActivity(intent);
     }
 
+    public void xmlToJava(){
+        tvReceivedData = findViewById(R.id.tvRecTxt);       //Test Textview
+        etSendMessage = findViewById(R.id.sendMessage);     //Test Nachricht
+        btnSend = findViewById(R.id.btnSend);               //Test Sendebefehl
+    }
+
+    public void onClickSend(View view) throws SocketException{  //ToDo: Sendebefehl mit boolscher Variable lösen --> wo setzen?
+        sendmsg = etSendMessage.getText().toString();           //ToDo: hier String von Sensoren übergeben
+        communication.setMessage(sendmsg, true);    //übergibt zu sendenden String und setzt die entscheidende Boolsche Variable fürs Senden
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        //Erstellen des Members
+        communication = new WifiCommunication(MainActivity.this, MainActivity.this, 1234);
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        //schließt socket
+        communication.stopCommunication();
+    }
 }

app/src/main/java/com/example/greenwatch/VideodetectionActivity.java

@@ -1,27 +0,0 @@
-package com.example.greenwatch;
-
-import androidx.appcompat.app.AppCompatActivity;
-
-import android.os.Bundle;
-import android.view.View;
-import android.widget.Button;
-
-public class VideodetectionActivity extends AppCompatActivity {
-
-    private Button backToMainActivity;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_videodetection);
-
-        backToMainActivity = (Button) findViewById(R.id.videodetectorBackToMainActivity);
-
-        backToMainActivity.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                finish();
-            }
-        });
-    }
-}

app/src/main/java/com/example/greenwatch/VideodetectionAndAccelerometerActivity.java

@@ -1,27 +0,0 @@
-package com.example.greenwatch;
-
-import androidx.appcompat.app.AppCompatActivity;
-
-import android.os.Bundle;
-import android.view.View;
-import android.widget.Button;
-
-public class VideodetectionAndAccelerometerActivity extends AppCompatActivity {
-
-    private Button backToMainActivity;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_videodetection_and_accelerometer);
-
-        backToMainActivity = (Button) findViewById(R.id.videodetectionAndAccelerometerBackToMainActivity);
-
-        backToMainActivity.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                finish();
-            }
-        });
-    }
-}

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

@@ -0,0 +1,124 @@
+package com.example.greenwatch;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+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.util.Enumeration;
+
+public class WifiCommunication {
+    private final MainActivity mainActivity;
+    private final InetAddress address;
+    private final int port;
+    private final Context context;
+    private boolean newMsg;
+    private String rxString;
+    private String sendMsg;
+    //private String sendMsg = "default";
+    private final DatagramSocket socket;
+    volatile private boolean running;
+    @SuppressLint("SetTextI18n")
+    public WifiCommunication(MainActivity mainActivity, Context context, int port) {
+        this.mainActivity = mainActivity;
+        this.port = port;
+        this.context = context;
+        try {
+            socket = new DatagramSocket(this.port);
+            socket.setBroadcast(true);
+            address = InetAddress.getByName("255.255.255.255");
+            running = true;
+            new ReceiveThread().start();
+            new SendThread().start();
+        } catch (SocketException | UnknownHostException e) {
+            throw new RuntimeException(e);
+        }
+        mainActivity.runOnUiThread(() -> Toast.makeText(context,"Communication running", Toast.LENGTH_SHORT).show());
+    }
+    private class ReceiveThread extends Thread {
+        private String rxString = "";
+        private String previousRxString = "";
+        @Override
+        public void run() {
+            try {
+                do {
+
+                    byte[] rxBuffer = new byte[1024];
+                    DatagramPacket packet = new DatagramPacket(rxBuffer, rxBuffer.length);
+                    socket.receive(packet);
+                    rxString = new String(packet.getData(), 0, packet.getLength());
+
+                    if(!previousRxString.equals(rxString))
+                        mainActivity.runOnUiThread(() -> mainActivity.tvReceivedData.setText(rxString));
+
+                    previousRxString = rxString;
+
+                } while (running);
+            }
+            catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    public String showMessage(){
+        return rxString;
+    }
+    public void setMessage(String message, boolean newMsg){
+        this.sendMsg=message;
+        this.newMsg = newMsg;
+    }
+    private class SendThread extends Thread {
+        private int tmpCnt = 0;
+        @Override
+        public void run() {
+            try {
+                do {
+
+                    if(newMsg == true)
+                    {
+                        newMsg = false;
+
+                        String txString = getLocalIpAddress() + " sends. #" + tmpCnt++ + sendMsg;
+                        byte[] txBuffer = txString.getBytes();
+
+                        DatagramPacket txPacket = new DatagramPacket(txBuffer, txBuffer.length, address, port);
+
+                        for(int i = 0; i < 20; 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 stopCommunication() {
+        running = false;
+        socket.close();
+    }
+}

app/src/main/java/com/example/greenwatch/mvc/Device.java

@@ -1,29 +0,0 @@
-package com.example.greenwatch.mvc;
-
-
-public class Device {
-
-    private String sensor;
-    private Boolean isActive;
-
-    public Device(String Sensor, Boolean Status) {
-        this.sensor = Sensor;
-        this.isActive = Status;
-    }
-
-    public void setSensor(String Sensor) {
-        this.sensor = Sensor;
-    }
-
-    public String getSensor() {
-        return sensor;
-    }
-
-    public void setIsActive(Boolean Status) {
-        this.isActive = Status;
-    }
-
-    public Boolean getIsActive() {
-        return isActive;
-    }
-}

app/src/main/java/com/example/greenwatch/mvc/DeviceController.java

@@ -1,33 +0,0 @@
-package com.example.greenwatch.mvc;
-
-public class DeviceController {
-
-    private DeviceModel deviceModel;
-    private DeviceView deviceView;
-
-    public DeviceController(DeviceView view) {
-        this.deviceModel = DeviceModel.getInstance();
-        this.deviceView = view;
-    }
-
-    public void createDevice(String Sensor, Boolean Status) {
-        Device device = new Device(Sensor, Status);
-        deviceModel.addDevice(device);
-        // todo: Inform view and sender about changes
-    }
-    public void setDeviceSensor(String UUID, String Sensor) {
-       deviceModel.setDeviceSensor(UUID, Sensor);
-    }
-
-    public String  getDeviceSensor(String UUID) {
-        return deviceModel.getDeviceSensor(UUID);
-    }
-
-    public void setDeviceStatus(String UUID, Boolean Status) {
-        deviceModel.setDeviceStatus(UUID, Status);
-    }
-
-    public Boolean getDeviceStatus(String UUID) {
-        return deviceModel.getDeviceStatus(UUID);
-    }
-}

app/src/main/java/com/example/greenwatch/mvc/DeviceModel.java

@@ -1,47 +0,0 @@
-package com.example.greenwatch.mvc;
-
-import java.util.Vector;
-
-public class DeviceModel {
-    private static DeviceModel itemModelInstance;
-    // todo: should be a hashmap with UUID Keys
-    private Vector<Device> connectetDevicesList;
-
-    private DeviceModel() {
-        connectetDevicesList = new Vector<Device>();
-    }
-
-    public static synchronized DeviceModel getInstance() {
-        if (itemModelInstance == null){
-            itemModelInstance = new DeviceModel();
-        }
-        return itemModelInstance;
-    }
-
-    public void addDevice(Device device) {
-        // todo: Check if divece already exist
-        connectetDevicesList.add(device);
-    }
-
-    public Vector<Device> getConnectetDevicesList() {
-        return connectetDevicesList;
-    }
-
-    public void setDeviceSensor(String UUID, String Sensor) {
-        // todo: iterate through HashMap and find Divece for UUID
-    }
-
-    public String  getDeviceSensor(String UUID) {
-        // todo: iterate through HashMap and find Divece for UUID
-        return "hasToBeDone";
-    }
-
-    public void setDeviceStatus(String UUID, Boolean Status) {
-        // todo: iterate through HashMap and find Divece for UUID
-    }
-
-    public Boolean getDeviceStatus(String UUID) {
-        // todo: iterate through HashMap and find Divece for UUID
-        return false;
-    }
-}

app/src/main/java/com/example/greenwatch/mvc/DeviceView.java

@@ -1,10 +0,0 @@
-package com.example.greenwatch.mvc;
-
-import java.util.Vector;
-
-public class DeviceView {
-
-    public void updateView(Vector<Device> deviceVector) {
-        // todo: what should be displayed
-    }
-}

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

@@ -1,25 +0,0 @@
-<?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"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:orientation="vertical"
-    android:padding="10dp"
-    tools:context=".AccelerometerActivity">
-
-    <TextView
-        android:id="@+id/tvAccelerometerStatusmessage"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Accelerometer Activity">
-    </TextView>
-
-    <Button
-        android:id="@+id/accelerometerBackToMainActivity"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Back to MainActivity">
-    </Button>
-
-</LinearLayout>

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

@@ -1,25 +0,0 @@
-<?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"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:orientation="vertical"
-    android:padding="10dp"
-    tools:context=".AudiodetectionActivity">
-
-    <TextView
-        android:id="@+id/tvAudiodetectionStatusmessage"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Audiodetection Activity">
-    </TextView>
-
-    <Button
-        android:id="@+id/audiodetectorBackToMainActivity"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Back to MainActivity">
-    </Button>
-
-</LinearLayout>

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

@@ -1,25 +0,0 @@
-<?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"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:orientation="vertical"
-    android:padding="10dp"
-    tools:context=".AudiodetectionAndAccelerometerActivity">
-
-    <TextView
-        android:id="@+id/tvAudiodetectionAndAccelerometerStatusmessage"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Audiodetection + Accelerometer Activity">
-    </TextView>
-
-    <Button
-        android:id="@+id/audiodetectionAndAccelerometerBackToMainActivity"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Back to MainActivity">
-    </Button>
-
-</LinearLayout>

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

@@ -1,25 +0,0 @@
-<?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"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:orientation="vertical"
-    android:padding="10dp"
-    tools:context=".ConnectionActivity">
-
-    <TextView
-        android:id="@+id/tvConnectionStatusmessage"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Connection Activity">
-    </TextView>
-
-    <Button
-        android:id="@+id/connectionBackToMainActivity"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Back to MainActivity">
-    </Button>
-
-</LinearLayout>

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

@@ -1,75 +1,36 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout 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"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:orientation="vertical"
-    android:padding="10dp"
     tools:context=".MainActivity">
 
     <TextView
-        android:id="@+id/tvStatusmessage"
+        android:id="@+id/tvRecTxt"
-        android:layout_width="match_parent"
+        android:layout_width="wrap_content"
-        android:layout_height="match_parent"
+        android:layout_height="wrap_content"
-        android:text="Hello World!"
+        android:text="Received Message"
-        android:layout_weight="1">
+        app:layout_constraintTop_toBottomOf="@id/sendMessage"
-    </TextView>
+        app:layout_constraintStart_toStartOf="parent"/>
-    
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:orientation="vertical"
-        android:layout_weight="1">
 
-        <Button
+    <EditText
-            android:id="@+id/audiodetectionButton"
+        android:id="@+id/sendMessage"
-            android:layout_width="match_parent"
+        android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
+        android:layout_height="50dp"
-            android:layout_weight="1"
+        android:ems="10"
-            android:text="Audiodetection">
+        android:inputType="textPersonName"
-        </Button>
+        android:text="Send Message"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintStart_toStartOf="parent"/>
 
-        <Button
+    <Button
-            android:id="@+id/videodetectionButton"
+        android:id="@+id/btnSend"
-            android:layout_width="match_parent"
+        android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
+        android:layout_height="wrap_content"
-            android:layout_weight="1"
+        android:text="Send"
-            android:text="Videodetection">
+        android:onClick="onClickSend"
-        </Button>
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintStart_toEndOf="@id/sendMessage"/>
 
-        <Button
+</androidx.constraintlayout.widget.ConstraintLayout>
-            android:id="@+id/accelerometerButton"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Accelerometer">
-        </Button>
-
-        <Button
-            android:id="@+id/audiodetectionAndAccelerometerButton"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Audiodetection + Accelerometer">
-        </Button>
-
-        <Button
-            android:id="@+id/videodetectionAndAccelerometerButton"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Videodetection + Accelerometer">
-        </Button>
-
-        <Button
-            android:id="@+id/connectionButton"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Connect to Devices">
-        </Button>
-
-    </LinearLayout>
-
-</LinearLayout>

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

@@ -1,25 +0,0 @@
-<?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"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:orientation="vertical"
-    android:padding="10dp"
-    tools:context=".VideodetectionActivity">
-
-    <TextView
-        android:id="@+id/tvVideodetectionStatusmessage"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Videodetection Activity">
-    </TextView>
-
-    <Button
-        android:id="@+id/videodetectorBackToMainActivity"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Back to MainActivity">
-    </Button>
-
-</LinearLayout>

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

@@ -1,25 +0,0 @@
-<?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"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:orientation="vertical"
-    android:padding="10dp"
-    tools:context=".VideodetectionAndAccelerometerActivity">
-
-    <TextView
-        android:id="@+id/tvVideodetectionAndAccelerometerStatusmessage"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Videodetection + Accelerometer Activity">
-    </TextView>
-
-    <Button
-        android:id="@+id/videodetectionAndAccelerometerBackToMainActivity"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Back to MainActivity">
-    </Button>
-
-</LinearLayout>