Added Accelerometer to Project

app/build.gradle

@@ -25,7 +25,6 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
-    namespace 'com.example.greenwatch'
 }
 
 dependencies {
@@ -36,10 +35,4 @@ dependencies {
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.5'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
-
-    def camerax_version = "1.2.3"
-    implementation "androidx.camera:camera-camera2:${camerax_version}"
-    implementation "androidx.camera:camera-lifecycle:${camerax_version}"
-    implementation "androidx.camera:camera-view:${camerax_version}"
-
 }

app/src/main/AndroidManifest.xml

@@ -1,15 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-
+    package="com.example.greenwatch">
-    <uses-permission android:name="android.permission.RECORD_AUDIO"/>
-    <uses-permission android:name="android.permission.CAMERA"/>
-    <uses-permission android:name="android.permission.BLUETOOTH"/>
-    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
-    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
-    <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
-
-    <uses-feature android:name="android.hardware.camera"/>
 
     <application
         android:allowBackup="true"
@@ -18,6 +9,24 @@
         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">
@@ -27,10 +36,6 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-
-        <activity android:name=".KameraAktivitaet" />
-        <activity android:name=".Kamera_Beschleunigungssensor" />
-
     </application>
 
 </manifest>

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

@@ -0,0 +1,137 @@
+package com.example.greenwatch;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProvider;
+
+import android.hardware.Sensor;
+import android.hardware.SensorEvent;
+import android.hardware.SensorEventListener;
+import android.hardware.SensorManager;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.example.greenwatch.models.Device;
+import com.example.greenwatch.viewmodels.AccelerometerViewModel;
+
+import java.util.List;
+
+public class AccelerometerActivity extends AppCompatActivity implements SensorEventListener {
+
+    private SensorManager accelerometerManager;
+    private Sensor accelerometerSensor;
+    private TextView accelerometerStatusMessage;
+    private TextView accelerometerDataTV;
+    private TextView accelerometerWarningTV;
+    private Button backToMainActivityButton;
+    private AccelerometerViewModel mAccelerometerViewModel;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_accelerometer);
+
+        accelerometerStatusMessage = (TextView) findViewById(R.id.tvAccelerometerStatusmessage);
+        accelerometerDataTV = (TextView) findViewById(R.id.tvAccelerometerData);
+        accelerometerWarningTV = (TextView) findViewById(R.id.tvAccelerometerWarning);
+        backToMainActivityButton = (Button) findViewById(R.id.accelerometerBackToMainActivity);
+
+        backToMainActivityButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                finish();
+            }
+        });
+
+        mAccelerometerViewModel = new ViewModelProvider(this).get(AccelerometerViewModel.class);
+        mAccelerometerViewModel.init();
+        mAccelerometerViewModel.getConnectedDeviceList().observe(this, new Observer<List<Device>>() {
+            @Override
+            public void onChanged(List<Device> devices) {
+                StringBuilder sb = new StringBuilder();
+                sb.append("Time Stamp: ");
+                sb.append(mAccelerometerViewModel.getTimeStamp(mAccelerometerViewModel.getLocalDeviceUUID()));
+                sb.append(";\n");
+                sb.append("DeviceID: ");
+                sb.append(mAccelerometerViewModel.getDeviceID(mAccelerometerViewModel.getLocalDeviceUUID()));
+                sb.append(";\n");
+                sb.append("Sensor Status: ");
+                sb.append(mAccelerometerViewModel.getSensorStatus(mAccelerometerViewModel.getLocalDeviceUUID()));
+                sb.append(";\n");
+                sb.append("Sensor Type: ");
+                sb.append(mAccelerometerViewModel.getSensorType(mAccelerometerViewModel.getLocalDeviceUUID()));
+                sb.append(";\n");
+                sb.append("Sensor Massage: ");
+                sb.append(mAccelerometerViewModel.getSensorMassage(mAccelerometerViewModel.getLocalDeviceUUID()));
+                accelerometerStatusMessage.setText(sb);
+                Toast.makeText(AccelerometerActivity.this, "onChanged", Toast.LENGTH_LONG).show();
+            }
+        });
+
+        mAccelerometerViewModel.getMovementDetectedValue().observe(this, new Observer<Boolean>() {
+            @Override
+            public void onChanged(Boolean aBoolean) {
+                if (aBoolean) {
+                    mAccelerometerViewModel.setDevice(mAccelerometerViewModel.getLocalDeviceUUID(), mAccelerometerViewModel.getSystemTimeStamp(), mAccelerometerViewModel.getLocalDeviceUUID(), true, "Accelerometer", 10);
+                }
+                else {
+                    mAccelerometerViewModel.setDevice(mAccelerometerViewModel.getLocalDeviceUUID(), mAccelerometerViewModel.getSystemTimeStamp(), mAccelerometerViewModel.getLocalDeviceUUID(), false, "Accelerometer", 0);
+                }
+
+            }
+        });
+
+        accelerometerManager = (SensorManager) getSystemService(SENSOR_SERVICE);
+        if (accelerometerManager.getSensorList(Sensor.TYPE_GYROSCOPE).size() == 0) {
+            accelerometerSensor = null;
+            Toast.makeText(AccelerometerActivity.this, "No accelerometer sensor available", Toast.LENGTH_LONG).show();
+        }
+        else {
+            accelerometerSensor = accelerometerManager.getSensorList(Sensor.TYPE_GYROSCOPE).get(0);
+        }
+    }
+
+    @Override
+    public void onSensorChanged(SensorEvent event) {
+        StringBuilder sb = new StringBuilder();
+        sb.append("x=")
+                .append(event.values[0])
+                .append("\ny=")
+                .append(event.values[1])
+                .append("\nz=")
+                .append(event.values[2]);
+        accelerometerDataTV.setText(sb.toString());
+        mAccelerometerViewModel.addValueToGesamtBE(event.values[0] + event.values[1] + event.values[2]);
+        mAccelerometerViewModel.meanValueCalculation();
+        mAccelerometerViewModel.calibrateAccelerometerSensor();
+        mAccelerometerViewModel.checkAlarmCondition();
+
+    }
+
+    @Override
+    public void onAccuracyChanged(Sensor sensor, int accuracy) {
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        if (accelerometerSensor != null) {
+            if (accelerometerManager.registerListener(this, accelerometerSensor, SensorManager.SENSOR_DELAY_GAME)) {
+                Toast.makeText(AccelerometerActivity.this, "We registered to the sensor", Toast.LENGTH_LONG).show();
+            } else {
+                Toast.makeText(AccelerometerActivity.this, "Registration did not work", Toast.LENGTH_LONG).show();
+            }
+        }
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        if (accelerometerSensor != null) {
+            accelerometerManager.unregisterListener(this, accelerometerSensor);
+        }
+    }
+}

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

@@ -0,0 +1,27 @@
+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

@@ -0,0 +1,27 @@
+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

@@ -0,0 +1,27 @@
+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/Kamera.java

@@ -0,0 +1,4 @@
+package com.example.greenwatch;
+
+public class Kamera {
+}

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

@@ -1,205 +0,0 @@
-package com.example.greenwatch;
-
-import android.graphics.ImageFormat;
-import android.media.Image;
-import android.os.Bundle;
-import android.os.Handler;
-import android.util.Size;
-
-import android.widget.TextView;
-
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.camera.core.CameraSelector;
-import androidx.camera.core.ImageAnalysis;
-import androidx.camera.lifecycle.ProcessCameraProvider;
-// PREVIEW
-//import androidx.camera.view.PreviewView;
-import androidx.core.content.ContextCompat;
-
-import com.google.common.util.concurrent.ListenableFuture;
-
-import java.nio.ByteBuffer;
-import java.util.concurrent.ExecutionException;
-
-public class KameraAktivitaet extends AppCompatActivity {
-
-    // PREVIEW
-    // private PreviewView previewView;
-    private boolean isMotionDetected;
-    private boolean camera_alarm = false;
-    private TextView alarm;
-
-    // Bildverarbeitung Variablen
-    private ByteBuffer previousBuffer;
-    private int previousWidth;
-    private int previousHeight;
-    private final int threshold = 50;
-    private int startX;
-    private int startY;
-    private int endX;
-    private int endY;
-
-    private static final long ALARM_RESET_DELAY = 5000;
-    private Runnable alarmResetRunnable;
-    private final Handler alarmResetHandler = new Handler();
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_main);
-
-        // NUR FÜR TESTS
-        alarm = findViewById(R.id.textView);
-
-        // previewView = findViewById(R.id.previewView);
-
-        final ListenableFuture<ProcessCameraProvider> cameraProviderFuture = ProcessCameraProvider.getInstance(this);
-        cameraProviderFuture.addListener(() -> {
-            try {
-                bindImageAnalysis(cameraProviderFuture.get());
-            } catch (ExecutionException | InterruptedException e) {
-                e.printStackTrace();
-            }
-        }, ContextCompat.getMainExecutor(this));
-    }
-
-    private void bindImageAnalysis(ProcessCameraProvider cameraProvider) {
-        ImageAnalysis.Builder builder = new ImageAnalysis.Builder();
-        builder.setTargetResolution(new Size(640, 480));
-        builder.setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST);
-        ImageAnalysis imageAnalysis = builder.build();
-        imageAnalysis.setAnalyzer(
-                ContextCompat.getMainExecutor(this),
-                imageProxy -> {
-
-                    int imageFormat = imageProxy.getFormat();
-
-                    if (imageFormat == ImageFormat.YUV_420_888) {
-
-                        Image currentImage = imageProxy.getImage();
-
-                        if (previousHeight != 0) {
-                            assert currentImage != null;
-                            isMotionDetected = compareFrames(currentImage);
-                        }
-
-                        assert currentImage != null;
-                        Image.Plane[] planes = currentImage.getPlanes();
-                        ByteBuffer buffer = planes[0].getBuffer().duplicate();
-                        previousBuffer = ByteBuffer.allocateDirect(buffer.remaining());
-                        previousBuffer.put(buffer);
-                        previousWidth = currentImage.getWidth();
-                        previousHeight = currentImage.getHeight();
-
-                        currentImage.close();
-
-                        if (isMotionDetected) {
-
-                            alarm.setText("ALARM");
-                            camera_alarm = true;
-
-                            if(alarmResetRunnable != null) {
-                                alarmResetHandler.removeCallbacks(alarmResetRunnable);
-                            }
-
-                            alarmResetRunnable = this::resetAlarmStatus;
-                            alarmResetHandler.postDelayed(alarmResetRunnable, ALARM_RESET_DELAY);
-                        }
-                    }
-
-                    imageProxy.close();
-                });
-
-        // Preview preview = new Preview.Builder().build();
-
-        CameraSelector cameraSelector = new CameraSelector.Builder().requireLensFacing(CameraSelector.LENS_FACING_BACK).build();
-
-        // PREVIEW //
-        // preview.setSurfaceProvider(previewView.getSurfaceProvider());
-
-        cameraProvider.bindToLifecycle(this, cameraSelector, imageAnalysis);
-
-    }
-
-    // Bildverarbeitung zur Bewegungserkennung
-    private boolean compareFrames(Image currentImage) {
-        Image.Plane[] planes = currentImage.getPlanes();
-        ByteBuffer currentBuffer = planes[0].getBuffer();
-        int currentWidth = currentImage.getWidth();
-        int currentHeight = currentImage.getHeight();
-        int yRowStride = planes[0].getRowStride();
-        int yPixelStride = planes[0].getPixelStride();
-
-
-        //System.out.println("Höhe: " + currentHeight + "   Breite: " + currentWidth);
-
-        if (previousWidth != currentWidth || previousHeight != currentHeight) {
-            return false;
-        }
-
-        // Blöcke weiter verkleinern
-        int blockSize = kleinstesQuadrat(previousHeight, previousWidth) / 8;
-
-        //System.out.println(blockSize);
-
-        int numBlocksX = currentWidth / blockSize;
-        int numBlocksY = currentHeight / blockSize;
-
-        for (int blockY = 0; blockY < numBlocksY; blockY++) {
-            for (int blockX = 0; blockX < numBlocksX; blockX++) {
-                startX = blockX * blockSize;
-                startY = blockY * blockSize;
-                endX = startX + blockSize;
-                endY = startY + blockSize;
-
-                float currentLuminance = berechneMittlereLuminanz(currentBuffer, yRowStride, yPixelStride);
-                float previousLuminance = berechneMittlereLuminanz(previousBuffer, yRowStride, yPixelStride);
-
-                int pixelDifference = Math.abs((int) previousLuminance - (int) currentLuminance);
-
-                //System.out.println(pixelDifference);
-
-                if (pixelDifference > threshold) {
-                    System.out.println(pixelDifference);
-                    return true;
-                }
-            }
-        }
-
-        return false;
-    }
-
-    private float berechneMittlereLuminanz(ByteBuffer buffer, int rowStride, int pixelStride) {
-        int sumLuminance = 0;
-        int countPixels = 0;
-
-        for (int row = startY; row < endY; row++) {
-            for (int col = startX; col < endX; col++) {
-                int bufferIndex = row * rowStride + col * pixelStride;
-                int currentPixel = buffer.get(bufferIndex) & 0xFF;
-
-                sumLuminance += currentPixel;
-                countPixels++;
-            }
-        }
-
-        return (float) sumLuminance / countPixels;
-    }
-
-    private int kleinstesQuadrat(int height, int width) {
-        if (height == width) {
-            return height;
-        } else if (height > width) {
-            return kleinstesQuadrat(height - width, width);
-        } else {
-            return kleinstesQuadrat(height, width - height);
-        }
-    }
-
-    private void resetAlarmStatus() {
-        camera_alarm = false;
-        alarm.setText("OK");
-        alarmResetRunnable = null;
-    }
-}
-

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

@@ -1,320 +0,0 @@
-package com.example.greenwatch;
-
-import android.graphics.ImageFormat;
-import android.hardware.Sensor;
-import android.hardware.SensorEvent;
-import android.hardware.SensorEventListener;
-import android.hardware.SensorManager;
-import android.media.Image;
-import android.os.Bundle;
-import android.os.Handler;
-import android.os.HandlerThread;
-import android.os.Looper;
-import android.util.Size;
-
-import android.widget.TextView;
-
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.camera.core.CameraSelector;
-import androidx.camera.core.ImageAnalysis;
-import androidx.camera.lifecycle.ProcessCameraProvider;
-// PREVIEW
-//import androidx.camera.view.PreviewView;
-import androidx.core.content.ContextCompat;
-
-import com.google.common.util.concurrent.ListenableFuture;
-
-import java.nio.ByteBuffer;
-import java.text.SimpleDateFormat;
-import java.util.ArrayList;
-import java.util.Date;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.Executor;
-
-public class Kamera_Beschleunigungssensor extends AppCompatActivity implements SensorEventListener {
-
-    private HandlerThread cameraThread;
-    private Handler cameraHandler;
-    // PREVIEW
-    // private PreviewView previewView;
-    private boolean isMotionDetected;
-    private boolean camera_alarm;
-    private TextView alarm;
-    private ByteBuffer previousBuffer;
-    private int previousWidth;
-    private int previousHeight;
-
-    /////////////////////////////////////
-
-    private SensorManager bsmanager;
-    private ArrayList<Float> Gesamt_be;
-    private int sensorType = Sensor.TYPE_GYROSCOPE, zaehler_runde =0, listen_groesse = 500, kalibrieren, Offset_shared = 0, shared_merk, mittelwertsumme_shared;
-    private Sensor sens, sensor_l;
-    private float x_value = 0, y_value, z_value, Vorbesetzung = 0, gesamt_runde =0;
-    private double Schwellwert = 0.15, mittelwertsumme = 0.0, Offset = 0.1;
-    String Daten, Warnung, Zeitstempel, Array_shared;
-    private final static String KEY_kalibirieren = "KEY_KALIBRIEREN_"+Beschleunigungssensor.class.getSimpleName();
-    private final static String KEY_Gesamt_be = "KEY_GESAMT_BE_"+Beschleunigungssensor.class.getSimpleName();
-    private final static String KEY_Offset = "KEY_OFFSET_"+Beschleunigungssensor.class.getSimpleName();
-    private final static String KEY_Mittelwertsumme = "KEY_MITTELWERTSUMME_"+Beschleunigungssensor.class.getSimpleName();
-    TextView Daten_Bsensor, Warnung_Bsensor, test;
-    private boolean toggle = true, ts_setzen = true, start_messen;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_beschleunigung_kamera);
-        ////////
-        Daten_Bsensor = (TextView) findViewById(R.id.DatenBsensor);
-        Warnung_Bsensor = (TextView) findViewById(R.id.WarnungBsensor);
-        test = (TextView) findViewById(R.id.test);
-
-        bsmanager = (SensorManager) getSystemService(SENSOR_SERVICE);
-        if (bsmanager.getSensorList(Sensor.TYPE_GYROSCOPE).size() == 0) {
-            sens = null;
-            Daten = "kein B Sensor voranden";
-        } else {
-            sens = bsmanager.getSensorList(sensorType).get(0);
-        }
-        Gesamt_be = new ArrayList<Float>();
-        for (int i = 0; i < listen_groesse ; i++){
-            Gesamt_be.add(Vorbesetzung);
-        }
-        kalibrieren = 0;
-        start_messen = false;
-
-        ///////
-        // NUR FÜR TESTS
-        alarm = findViewById(R.id.Alarm_Kamera);
-
-        // PREVIEW //
-        // previewView = findViewById(R.id.previewView);
-
-        final ListenableFuture<ProcessCameraProvider> cameraProviderFuture = ProcessCameraProvider.getInstance(this);
-        cameraProviderFuture.addListener(() -> {
-            try {
-                bindImageAnalysis(cameraProviderFuture.get());
-            } catch (ExecutionException | InterruptedException e) {
-                e.printStackTrace();
-            }
-        }, ContextCompat.getMainExecutor(this));
-    }
-
-    public static String getTimestamp(){
-        Long tslong = System.currentTimeMillis();
-        SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
-        Date date = new Date(tslong);
-        String result = sdf.format(date);
-
-        return result;
-    }
-
-    @Override
-    public void onSensorChanged(SensorEvent event) {
-        StringBuilder sb = new StringBuilder();
-        sb.append("x=").append(event.values[0])//.append(event.timestamp)
-                .append("\ny=").append(event.values[1])
-                .append("\nz=").append(event.values[2]);
-        Daten = sb.toString();
-        Daten_Bsensor.setText(Daten);
-        gesamt_runde = event.values[0] + event.values[1] + event.values[2];
-        Gesamt_be.remove(zaehler_runde);
-        Gesamt_be.add(zaehler_runde, gesamt_runde);
-        mittelwertsumme = 0.0;
-
-        //Mittelwert des Arrays berechnen
-        for (int i = 0; i < listen_groesse; i++){
-            if (Gesamt_be.get(i) < 0){
-                mittelwertsumme += (Gesamt_be.get(i) * (-1));
-            }else {
-                mittelwertsumme += Gesamt_be.get(i);
-            }
-        }
-        mittelwertsumme = mittelwertsumme/listen_groesse;
-        if (kalibrieren < listen_groesse){
-            Offset = mittelwertsumme;
-            kalibrieren++;
-        }else {
-            start_messen = true;
-        }
-        StringBuilder testsb = new StringBuilder();
-        testsb.append(mittelwertsumme);
-        String tests = testsb.toString();
-        test.setText(tests);
-
-        if((mittelwertsumme > (Schwellwert+Offset) ) & (ts_setzen == true) &(start_messen == true)){
-            Zeitstempel = getTimestamp();
-            StringBuilder ts = new StringBuilder();
-            ts.append(Zeitstempel)
-                    .append(", Gruppe3")
-                    .append(", An")
-                    .append(", Bewegung, ")
-                    .append(mittelwertsumme);
-            Warnung = ts.toString();
-            Warnung_Bsensor.setText(Warnung);
-            ts_setzen = false;
-        }else if((mittelwertsumme > (Schwellwert+Offset)) & (ts_setzen == false)){
-        } else if ((mittelwertsumme < (Schwellwert+Offset)) & (ts_setzen == false)) {
-            Warnung_Bsensor.setText("");
-            ts_setzen = true;
-        }
-
-        if (zaehler_runde < (listen_groesse -1)){
-            zaehler_runde++;
-        }else {
-            zaehler_runde = 0;
-        }
-    }
-    //mittelwertsumme ist kein int in diesem programm
-    //shared prefenrences: bei Kippen speichern -> nochmal neu klalibrieren? -> eig ja, weil neuer Standort
-    //Vorbelegung nicht nochmal neu vornehmen -> aus onCreate Funktion raus -> hilfsvariablen auch in shared preferences speichern
-    @Override
-    public void onAccuracyChanged(Sensor sensor, int accuracy) {}
-
-    @Override
-    protected void onResume() {
-        super.onResume();
-        if (sens != null) {
-            if (bsmanager.registerListener(this, sens, SensorManager.SENSOR_DELAY_GAME)) {
-                Daten = "Wir haben uns beim Sensor angemeldet";
-            } else {
-                Daten = "Das anmelden hat nicht geklappt";
-            }
-        }
-        //SharedPreferences p = getPreferences(Context.MODE_PRIVATE);
-        //mittelwertsumme_shared = p.getInt(KEY_Mittelwertsumme, 0);
-        //kalibrieren = p.getInt(KEY_kalibirieren, 0);
-        //Offset_shared = p.getInt(KEY_Offset, 0 );
-        //Array_shared = p.getString(KEY_Gesamt_be, "");
-
-        //mittelwertsumme = (double) mittelwertsumme_shared;
-        //mittelwertsumme /= 1000000.0;
-
-        //Offset = (double) Offset_shared;
-        //Offset /= 1000000.0;
-
-        //String zw[] = Array_shared.split(";", listen_groesse);
-
-        //if(shared_merk == 2){
-        //for (int i=0; i<listen_groesse; i++){
-        //float wert = Float.valueOf(zw[i]);
-        //Gesamt_be.add(i, wert);
-        //}}
-
-    }
-
-
-    @Override
-    protected void onPause () {
-        super.onPause();
-        if (sens != null) {
-            bsmanager.unregisterListener(this, sens);
-        }
-        //shared_merk = 2;
-        // Offset_shared = (int) (Offset * 1000000.0);
-        //mittelwertsumme_shared = (int) (mittelwertsumme * 1000000.0);
-
-        //StringBuilder ar = new StringBuilder();
-        //for (int z=0; z < listen_groesse; z++){
-        //ar.append(Gesamt_be.get(z)).append(";");
-        //}
-        //Array_shared = ar.toString();
-
-        //SharedPreferences p = getPreferences(Context.MODE_PRIVATE);
-        //SharedPreferences.Editor editor = p.edit();
-        //editor.putInt(KEY_Mittelwertsumme, mittelwertsumme_shared);
-        //editor.putInt(KEY_kalibirieren, kalibrieren);
-        //editor.putInt(KEY_Offset, Offset_shared);
-        //editor.putString(KEY_Gesamt_be, Array_shared);
-        //editor.commit();
-    }
-
-    // KAMERA //
-    private void bindImageAnalysis(ProcessCameraProvider cameraProvider) {
-        ImageAnalysis.Builder builder = new ImageAnalysis.Builder();
-        builder.setTargetResolution(new Size(640, 480));
-        builder.setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST);
-        ImageAnalysis imageAnalysis = builder.build();
-        imageAnalysis.setAnalyzer(
-                ContextCompat.getMainExecutor(this),
-                imageProxy -> {
-
-                    int imageFormat = imageProxy.getFormat();
-
-                    if (imageFormat == ImageFormat.YUV_420_888) {
-
-                        Image currentImage = imageProxy.getImage();
-
-                        if (previousHeight != 0) {
-                            assert currentImage != null;
-                            isMotionDetected = compareFrames(currentImage);
-                        }
-
-                        assert currentImage != null;
-                        Image.Plane[] planes = currentImage.getPlanes();
-                        ByteBuffer buffer = planes[0].getBuffer().duplicate();
-                        previousBuffer = ByteBuffer.allocateDirect(buffer.remaining());
-                        previousBuffer.put(buffer);
-                        previousWidth = currentImage.getWidth();
-                        previousHeight = currentImage.getHeight();
-
-                        currentImage.close();
-
-                        if (isMotionDetected) {
-                            alarm.setText("ALARM");
-                            camera_alarm = true;
-                        } else {
-                            camera_alarm = false;
-                            alarm.setText("OK");
-                        }
-
-                    }
-
-                    imageProxy.close();
-                });
-
-        // Preview preview = new Preview.Builder().build();
-
-        CameraSelector cameraSelector = new CameraSelector.Builder().requireLensFacing(CameraSelector.LENS_FACING_BACK).build();
-
-        // PREVIEW //
-        // preview.setSurfaceProvider(previewView.getSurfaceProvider());
-
-        cameraProvider.bindToLifecycle(this, cameraSelector, imageAnalysis);
-
-    }
-
-    // Bildverarbeitung zur Bewegungserkennung
-    private boolean compareFrames(Image currentImage) {
-
-        ByteBuffer currentBuffer = currentImage.getPlanes()[0].getBuffer();
-
-        int currentWidth = currentImage.getWidth();
-        int currentHeight = currentImage.getHeight();
-
-        if (previousWidth != currentWidth || previousHeight != currentHeight) {
-            return false;
-        }
-
-        for (int row = 0; row < previousHeight; row++) {
-            for (int col = 0; col < previousWidth; col++) {
-
-                int previousIndex = row * previousWidth + col;
-                int currentIndex = row * currentWidth + col;
-
-                int previousPixel = previousBuffer.get(previousIndex) & 0xFF;
-                int currentPixel = currentBuffer.get(currentIndex) & 0xFF;
-
-                int pixelDifference = Math.abs(previousPixel - currentPixel);
-                int threshold = 120;
-
-                if (pixelDifference > threshold) {
-                    // Testzwecke
-                    //String text = String.valueOf(pixelDifference);
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-}

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

@@ -1,40 +1,138 @@
 package com.example.greenwatch;
 
-import android.content.Intent;
-import android.content.pm.PackageManager;
-import android.os.Bundle;
-import android.widget.Button;
-
 import androidx.appcompat.app.AppCompatActivity;
-import androidx.core.app.ActivityCompat;
+import androidx.lifecycle.Observer;
-import androidx.core.content.ContextCompat;
+import androidx.lifecycle.ViewModelProvider;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.example.greenwatch.models.Device;
+import com.example.greenwatch.viewmodels.MainActivityViewModel;
+
+import java.util.List;
 
 public class MainActivity extends AppCompatActivity {
-    private static final int RECHTEANFORDERUNG_KAMERA = 10;
+
+    private TextView tvstatusmessage;
+    private Button audiodetectionButton;
+    private Button videodetectionButton;
+    private Button accelerometerButton;
+    private Button audiodetectionAndAccelerometerButton;
+    private Button videodetectionAndAccelerometerButton;
+    private Button connectionButton;
+    private MainActivityViewModel mMainActivityViewModel;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
-        Button kameraStarten = findViewById(R.id.button_camera);
+
-        kameraStarten.setOnClickListener(v -> {
+        tvstatusmessage = (TextView) findViewById(R.id.tvStatusmessage);
-            if (istZugriffAufKameraErlaubt()) {
+        audiodetectionButton = (Button) findViewById(R.id.audiodetectionButton);
-                starteKameraAktivitaet();
+        videodetectionButton = (Button) findViewById(R.id.videodetectionButton);
-            } else {
+        accelerometerButton = (Button) findViewById(R.id.accelerometerButton);
-                zugriffAufKameraAnfordern();
+        audiodetectionAndAccelerometerButton = (Button) findViewById(R.id.audiodetectionAndAccelerometerButton);
+        videodetectionAndAccelerometerButton = (Button) findViewById(R.id.videodetectionAndAccelerometerButton);
+        connectionButton = (Button) findViewById(R.id.connectionButton);
+
+        mMainActivityViewModel = new ViewModelProvider(this).get(MainActivityViewModel.class);
+        mMainActivityViewModel.init();
+        mMainActivityViewModel.getConnectedDeviceList().observe(this, new Observer<List<Device>>() {
+            @Override
+            public void onChanged(List<Device> devices) {
+                StringBuilder sb = new StringBuilder();
+                sb.append("Time Stamp: ");
+                sb.append(mMainActivityViewModel.getTimeStamp(mMainActivityViewModel.getLocalDeviceUUID()));
+                sb.append(";\n");
+                sb.append("DeviceID: ");
+                sb.append(mMainActivityViewModel.getDeviceID(mMainActivityViewModel.getLocalDeviceUUID()));
+                sb.append(";\n");
+                sb.append("Sensor Status: ");
+                sb.append(mMainActivityViewModel.getSensorStatus(mMainActivityViewModel.getLocalDeviceUUID()));
+                sb.append(";\n");
+                sb.append("Sensor Type: ");
+                sb.append(mMainActivityViewModel.getSensorType(mMainActivityViewModel.getLocalDeviceUUID()));
+                sb.append(";\n");
+                sb.append("Sensor Massage: ");
+                sb.append(mMainActivityViewModel.getSensorMassage(mMainActivityViewModel.getLocalDeviceUUID()));
+                tvstatusmessage.setText(sb);
+                Toast.makeText(MainActivity.this, "onChanged", Toast.LENGTH_LONG).show();
+            }
+        });
+
+        audiodetectionButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                //openAudiodetectionActivity();
+                mMainActivityViewModel.setDevice(mMainActivityViewModel.getLocalDeviceUUID(), "10:51", "12345", false, "Audio", 10);
+            }
+        });
+        videodetectionButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                //openVideodetectionActivity();
+                mMainActivityViewModel.setSensorType(mMainActivityViewModel.getLocalDeviceUUID(), "Video");
+                mMainActivityViewModel.setTimeStamp(mMainActivityViewModel.getLocalDeviceUUID(), "12:50");
+                mMainActivityViewModel.setDeviceID(mMainActivityViewModel.getLocalDeviceUUID(), mMainActivityViewModel.getLocalDeviceUUID());
+            }
+        });
+        accelerometerButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                openAccelerometerActivity();
+                mMainActivityViewModel.setSensorType(mMainActivityViewModel.getLocalDeviceUUID(), "Accelerometer");
+            }
+        });
+        audiodetectionAndAccelerometerButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                //openAudiodetectionAndAccelerometerActivity();
+                mMainActivityViewModel.setSensorType(mMainActivityViewModel.getLocalDeviceUUID(), "AudiodetectionAndAccelerometer");
+                mMainActivityViewModel.setTimeStamp(mMainActivityViewModel.getLocalDeviceUUID(), "00:00");
+                mMainActivityViewModel.setDeviceID(mMainActivityViewModel.getLocalDeviceUUID(), "6789");
+            }
+        });
+        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(){
-    private boolean istZugriffAufKameraErlaubt() {
+        Intent intent = new Intent(this, AudiodetectionActivity.class);
-        return ContextCompat.checkSelfPermission(this, android.Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED;
+        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);
     }
 
-    private void zugriffAufKameraAnfordern() {
-        ActivityCompat.requestPermissions(this,new String[]{android.Manifest.permission.CAMERA}, RECHTEANFORDERUNG_KAMERA);
-    }
-
-    private void starteKameraAktivitaet() {
-        startActivity(new Intent(this, KameraAktivitaet.class));
-    }
 }

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

@@ -0,0 +1,27 @@
+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

@@ -0,0 +1,27 @@
+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/models/Device.java

@@ -0,0 +1,57 @@
+package com.example.greenwatch.models;
+
+
+public class Device {
+
+    private String timeStamp;
+    private String deviceID;
+    private boolean sensorStatus;
+    private String sensorType;
+    private int sensorMassage;
+
+    public Device(String timeStamp, String deviceID, boolean sensorStatus, String sensorType, int sensorMassage) {
+        this.timeStamp = timeStamp;
+        this.deviceID = deviceID;
+        this.sensorStatus = sensorStatus;
+        this.sensorType = sensorType;
+        this.sensorMassage = sensorMassage;
+    }
+    public void setTimeStamp(String timeStamp) {
+        this.timeStamp = timeStamp;
+    }
+
+    public String getTimeStamp() {
+        return timeStamp;
+    }
+
+    public void setDeviceID(String deviceID) {
+        this.deviceID = deviceID;
+    }
+
+    public String getDeviceID() {
+        return deviceID;
+    }
+    public void setSensorType(String sensorType) {
+        this.sensorType = sensorType;
+    }
+
+    public String getSensorType() {
+        return sensorType;
+    }
+
+    public void setSensorStatus(boolean sensorStatus) {
+        this.sensorStatus = sensorStatus;
+    }
+
+    public Boolean getSensorStatus() {
+        return sensorStatus;
+    }
+
+    public void setSensorMassage(int sensorMassage) {
+        this.sensorMassage = sensorMassage;
+    }
+
+    public int getSensorMassage() {
+        return sensorMassage;
+    }
+}

app/src/main/java/com/example/greenwatch/repositories/DeviceRepository.java

@@ -0,0 +1,216 @@
+package com.example.greenwatch.repositories;
+
+
+import androidx.lifecycle.MutableLiveData;
+
+import com.example.greenwatch.models.Device;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.UUID;
+
+public class DeviceRepository {
+
+    private String delimiter = ", ";
+    private String deviceUUID;
+    private static DeviceRepository deviceRepositoryInstance;
+    private MutableLiveData<List<Device>> deviceList = new MutableLiveData<>();
+    private HashMap<String, Device> connectedDevicesList = new HashMap<>();
+    private HashMap<String, String> deviceIDMapper = new HashMap<>();
+
+    public static synchronized DeviceRepository getInstance() {
+        if (deviceRepositoryInstance == null){
+            deviceRepositoryInstance = new DeviceRepository();
+            deviceRepositoryInstance.setDeviceUUID();
+        }
+        return deviceRepositoryInstance;
+    }
+
+    public MutableLiveData<List<Device>> getConnectedDeviceList() {
+        setMutableLiveDataValue();
+        return deviceList;
+    }
+
+    public void createNewDevice(String timeStamp, String deviceID, boolean sensorStatus, String sensorType, int sensorMassage){
+        Device newDevice = new Device(timeStamp, deviceID, sensorStatus, sensorType, sensorMassage);
+        addToConnectedDeviceList(newDevice.getDeviceID(), newDevice);
+        setMutableLiveDataValue();
+    }
+
+    public void createNewRemoteDevice(String message) {
+        String[] messageString = messageStringSplitter(message);
+        String timeStamp = messageString[0];
+        String deviceID = messageString[1];
+        boolean sensorStatus = Boolean.valueOf(messageString[1]);
+        String sensorType = messageString[3];
+        int sensorMassage = Integer.valueOf(messageString[4]);
+
+        if(!connectedDevicesList.containsKey(deviceID)) {
+            createNewDevice(timeStamp, deviceID, sensorStatus, sensorType, sensorMassage);
+        }
+    }
+
+    public String messageStringBuilder(String deviceID) {
+        StringBuilder message = new StringBuilder();
+        Device device = connectedDevicesList.get(deviceID);
+        if(device != null) {
+            message.append(device.getTimeStamp())
+                    .append(delimiter)
+                    .append(device.getDeviceID())
+                    .append(delimiter)
+                    .append(device.getSensorStatus())
+                    .append(delimiter)
+                    .append(device.getSensorType())
+                    .append(delimiter)
+                    .append(device.getSensorMassage());
+            return message.toString();
+        }
+        return message.toString();
+    }
+
+    public String getLocalDeviceUUID() {
+        return deviceUUID;
+    }
+
+    public void setDevice(String deviceID, String timeStamp, String newDeviceID, boolean sensorStatus, String sensorType, int sensorMassage) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            device.setTimeStamp(timeStamp);
+            device.setDeviceID(newDeviceID);
+            device.setSensorStatus(sensorStatus);
+            device.setSensorType(sensorType);
+            device.setSensorMassage(sensorMassage);
+            setDeviceIDMapper(newDeviceID);
+            connectedDevicesList.remove(checkedDeviceID);
+            addToConnectedDeviceList(newDeviceID, device);
+            setMutableLiveDataValue();
+        }
+    }
+
+    public void setTimeStamp(String deviceID, String timeStamp) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            device.setTimeStamp(timeStamp);
+            addToConnectedDeviceList(checkedDeviceID, device);
+            setMutableLiveDataValue();
+        }
+    }
+
+    public String getTimeStamp(String deviceID) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            return device.getTimeStamp();
+        }
+        return "";
+    }
+
+    public void setDeviceID(String deviceID, String newDeviceID) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            device.setDeviceID(newDeviceID);
+            setDeviceIDMapper(newDeviceID);
+            connectedDevicesList.remove(checkedDeviceID);
+            addToConnectedDeviceList(newDeviceID, device);
+            setMutableLiveDataValue();
+        }
+    }
+
+    public String getDeviceID(String deviceID) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            return device.getDeviceID();
+        }
+        return "";
+    }
+
+    public void setSensorStatus(String deviceID, boolean sensorStatus) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            device.setSensorStatus(sensorStatus);
+            addToConnectedDeviceList(checkedDeviceID, device);
+            setMutableLiveDataValue();
+        }
+    }
+
+    public boolean getSensorStatus(String deviceID) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            return device.getSensorStatus();
+        }
+        return false;
+    }
+
+    public void setSensorType(String deviceID, String sensorType) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            device.setSensorType(sensorType);
+            addToConnectedDeviceList(checkedDeviceID, device);
+            setMutableLiveDataValue();
+        }
+    }
+
+    public String getSensorType(String deviceID) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            return device.getSensorType();
+        }
+        return "";
+    }
+
+    public void setSensorMassage(String deviceID, int sensorMessage) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            device.setSensorMassage(sensorMessage);
+            addToConnectedDeviceList(checkedDeviceID, device);
+            setMutableLiveDataValue();
+        }
+    }
+
+    public int getSensorMassage(String deviceID) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            return device.getSensorMassage();
+        }
+        return 0;
+    }
+
+    private void setMutableLiveDataValue() {
+        List<Device> list = new ArrayList<>(connectedDevicesList.values());
+        deviceList.setValue(list);
+    }
+
+    private void addToConnectedDeviceList(String key, Device device) {
+        connectedDevicesList.put(key, device);
+    }
+
+    private String checkDeviceID(String deviceID) {
+        if(!deviceIDMapper.isEmpty() && deviceID.equals(deviceUUID)) {
+            return deviceIDMapper.get(deviceID);
+        }
+        return deviceID;
+    }
+
+    private void setDeviceIDMapper(String deviceID) {
+        deviceIDMapper.put(deviceUUID, deviceID);
+    }
+
+    private void setDeviceUUID(){
+        this.deviceUUID = UUID.randomUUID().toString();
+    }
+
+    private String[] messageStringSplitter(String message) {
+        return message.split(delimiter);
+    }
+}

app/src/main/java/com/example/greenwatch/viewmodels/AccelerometerViewModel.java

@@ -0,0 +1,143 @@
+package com.example.greenwatch.viewmodels;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+import com.example.greenwatch.models.Device;
+import com.example.greenwatch.repositories.DeviceRepository;
+
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+public class AccelerometerViewModel extends ViewModel {
+
+    private MutableLiveData<List<Device>> mDeviceList;
+    private MutableLiveData<Boolean> mMovementDetected = new MutableLiveData<>();
+    private DeviceRepository mDeviceRepository;
+    private ArrayList<Float> Gesamt_be;
+    int arraySize = 500;
+    int functionCallCount;
+    float meanValue;
+    float offsetValue;
+    float thresholdValue;
+    boolean startMeasuring;
+
+    public void init() {
+        if (mDeviceList == null) {
+            mDeviceRepository = DeviceRepository.getInstance();
+            mDeviceList = mDeviceRepository.getConnectedDeviceList();
+        }
+        initGesamtBE();
+        mMovementDetected.setValue(false);
+        functionCallCount = 0;
+        meanValue = 0f;
+        offsetValue = 0.1f;
+        thresholdValue = 0.15f;
+        startMeasuring = false;
+    }
+
+    public void initGesamtBE() {
+        Gesamt_be = new ArrayList<>(arraySize);
+        for (int i = 0; i < arraySize; i++) {
+            Gesamt_be.add(0f);
+        }
+    }
+
+    public void addValueToGesamtBE(float newValue) {
+        if (Gesamt_be.size() == arraySize) {
+            Gesamt_be.remove(Gesamt_be.size() -1);
+        }
+        Gesamt_be.add(0, newValue);
+        functionCallCount++;
+    }
+
+    public void meanValueCalculation() {
+        for (float element : Gesamt_be) {
+            meanValue += Math.abs(element);
+        }
+        meanValue = meanValue/arraySize;
+    }
+
+    public void calibrateAccelerometerSensor() {
+        if (functionCallCount <= arraySize) {
+            offsetValue = meanValue;
+        }
+        else {
+            startMeasuring = true;
+        }
+    }
+
+    public void checkAlarmCondition() {
+        if (meanValue > (thresholdValue + offsetValue) && startMeasuring && !mMovementDetected.getValue()) {
+            mMovementDetected.setValue(true);
+        }
+        else if (meanValue < (thresholdValue + offsetValue) && mMovementDetected.getValue()){
+            mMovementDetected.setValue(false);
+        }
+    }
+
+    public String getSystemTimeStamp() {
+        SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");
+        Date date = new Date(System.currentTimeMillis());
+        return formatter.format(date);
+    }
+
+    public LiveData<Boolean> getMovementDetectedValue() {
+        return mMovementDetected;
+    }
+
+    public LiveData<List<Device>> getConnectedDeviceList() {
+        return mDeviceList;
+    }
+
+    public void setDevice(String deviceID, String timeStamp, String newDeviceID, boolean sensorStatus, String sensorType, int sensorMassage) {
+        mDeviceRepository.setDevice(deviceID, timeStamp,newDeviceID, sensorStatus, sensorType, sensorMassage);
+    }
+
+    public void setTimeStamp(String deviceID, String timeStamp) {
+        mDeviceRepository.setTimeStamp(deviceID, timeStamp);
+    }
+
+    public String getTimeStamp(String deviceID) {
+        return mDeviceRepository.getTimeStamp(deviceID);
+    }
+
+    public void setDeviceID(String deviceID, String newDeviceID) {
+        mDeviceRepository.setDeviceID(deviceID, newDeviceID);
+    }
+
+    public String getDeviceID(String deviceID) {
+        return mDeviceRepository.getDeviceID(deviceID);
+    }
+
+    public void setSensorStatus(String deviceID, boolean sensorStatus) {
+        mDeviceRepository.setSensorStatus(deviceID, sensorStatus);
+    }
+
+    public boolean getSensorStatus(String deviceID) {
+        return mDeviceRepository.getSensorStatus(deviceID);
+    }
+
+    public void setSensorType(String deviceID, String sensorType) {
+        mDeviceRepository.setSensorType(deviceID, sensorType);
+    }
+
+    public String getSensorType(String deviceID) {
+        return mDeviceRepository.getSensorType(deviceID);
+    }
+
+    public void setSensorMassage(String deviceID, int sensorMessage) {
+        mDeviceRepository.setSensorMassage(deviceID, sensorMessage);
+    }
+
+    public int getSensorMassage(String deviceID) {
+        return mDeviceRepository.getSensorMassage(deviceID);
+    }
+
+    public String getLocalDeviceUUID() {
+        return mDeviceRepository.getLocalDeviceUUID();
+    }
+}

app/src/main/java/com/example/greenwatch/viewmodels/MainActivityViewModel.java

@@ -0,0 +1,77 @@
+package com.example.greenwatch.viewmodels;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+import com.example.greenwatch.models.Device;
+import com.example.greenwatch.repositories.DeviceRepository;
+
+import java.util.List;
+
+public class MainActivityViewModel extends ViewModel {
+
+    private MutableLiveData<List<Device>> mDeviceList;
+    private DeviceRepository mDeviceRepository;
+
+    public void init() {
+        if(mDeviceList != null) {
+            return;
+        }
+        mDeviceRepository = DeviceRepository.getInstance();
+        mDeviceRepository.createNewDevice("", mDeviceRepository.getLocalDeviceUUID(), false, "", 0);
+        mDeviceList = mDeviceRepository.getConnectedDeviceList();
+    }
+
+    public LiveData<List<Device>> getConnectedDeviceList() {
+        return mDeviceList;
+    }
+
+    public void setDevice(String deviceID, String timeStamp, String newDeviceID, boolean sensorStatus, String sensorType, int sensorMassage) {
+        mDeviceRepository.setDevice(deviceID, timeStamp,newDeviceID, sensorStatus, sensorType, sensorMassage);
+    }
+
+    public void setTimeStamp(String deviceID, String timeStamp) {
+        mDeviceRepository.setTimeStamp(deviceID, timeStamp);
+    }
+
+    public String getTimeStamp(String deviceID) {
+        return mDeviceRepository.getTimeStamp(deviceID);
+    }
+
+    public void setDeviceID(String deviceID, String newDeviceID) {
+        mDeviceRepository.setDeviceID(deviceID, newDeviceID);
+    }
+
+    public String getDeviceID(String deviceID) {
+        return mDeviceRepository.getDeviceID(deviceID);
+    }
+
+    public void setSensorStatus(String deviceID, boolean sensorStatus) {
+        mDeviceRepository.setSensorStatus(deviceID, sensorStatus);
+    }
+
+    public boolean getSensorStatus(String deviceID) {
+        return mDeviceRepository.getSensorStatus(deviceID);
+    }
+
+    public void setSensorType(String deviceID, String sensorType) {
+        mDeviceRepository.setSensorType(deviceID, sensorType);
+    }
+
+    public String getSensorType(String deviceID) {
+        return mDeviceRepository.getSensorType(deviceID);
+    }
+
+    public void setSensorMassage(String deviceID, int sensorMessage) {
+        mDeviceRepository.setSensorMassage(deviceID, sensorMessage);
+    }
+
+    public int getSensorMassage(String deviceID) {
+        return mDeviceRepository.getSensorMassage(deviceID);
+    }
+
+    public String getLocalDeviceUUID() {
+        return mDeviceRepository.getLocalDeviceUUID();
+    }
+}

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

@@ -0,0 +1,39 @@
+<?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="">
+    </TextView>
+
+    <TextView
+        android:id="@+id/tvAccelerometerData"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="">
+    </TextView>
+
+    <TextView
+        android:id="@+id/tvAccelerometerWarning"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="">
+    </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

@@ -0,0 +1,25 @@
+<?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

@@ -0,0 +1,25 @@
+<?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_beschleunigung_kamera.xml

@@ -1,38 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<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"
-    tools:context=".Beschleunigungssensor">
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:orientation="vertical">
-
-        <TextView
-            android:id="@+id/DatenBsensor"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="" />
-
-        <TextView
-            android:id="@+id/WarnungBsensor"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="" />
-
-        <TextView
-            android:id="@+id/test"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="" />
-
-        <TextView
-            android:id="@+id/Alarm_Kamera"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="OK" />
-    </LinearLayout>
-</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,25 @@
+<?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_demo_kamera2_nebenaktivitaet.xml

@@ -1,54 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<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"
-    tools:context=".KameraAktivitaet">
-
-    <FrameLayout
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:id="@+id/erklaerung">
-
-        <Button
-            android:id="@+id/button2"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:text="Button" />
-
-        <androidx.camera.view.PreviewView
-            android:id="@+id/previewView"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent">
-
-        </androidx.camera.view.PreviewView>
-    </FrameLayout>
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:orientation="vertical">
-
-        <TextView
-            android:id="@+id/alarm"
-            android:layout_width="match_parent"
-            android:layout_height="0dp"
-            android:layout_weight="1"
-            android:layout_gravity="center"
-            android:gravity="center"
-            android:text=""
-            android:textSize="100sp"
-            android:textColor="#9999ff"/>
-        <TextView
-            android:id="@+id/threshold_test"
-            android:layout_width="match_parent"
-            android:layout_height="0dp"
-            android:layout_weight="1"
-            android:layout_gravity="center"
-            android:gravity="center"
-            android:text=""
-            android:textSize="100sp"
-            android:textColor="#9999ff"/>
-    </LinearLayout>
-
-</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -1,44 +1,75 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<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=".MainActivity">
 
-    <Button
-        android:id="@+id/button_camera"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Kamera starten"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.129"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintVertical_bias="0.931" />
-
     <TextView
-        android:id="@+id/textView"
+        android:id="@+id/tvStatusmessage"
-        android:layout_width="wrap_content"
+        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
+        android:layout_height="match_parent"
-        android:text=" "
+        android:text="Hello World!"
-        app:layout_constraintBottom_toBottomOf="parent"
+        android:layout_weight="1">
-        app:layout_constraintEnd_toEndOf="parent"
+    </TextView>
-        app:layout_constraintHorizontal_bias="0.498"
+    
-        app:layout_constraintStart_toStartOf="parent"
+    <LinearLayout
-        app:layout_constraintTop_toTopOf="parent"
+        android:layout_width="match_parent"
-        app:layout_constraintVertical_bias="0.247" />
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:layout_weight="1">
 
-    <TextView
+        <Button
-        android:id="@+id/textView2"
+            android:id="@+id/audiodetectionButton"
-        android:layout_width="wrap_content"
+            android:layout_width="match_parent"
-        android:layout_height="wrap_content"
+            android:layout_height="wrap_content"
-        android:text="TextView"
+            android:layout_weight="1"
-        app:layout_constraintBottom_toBottomOf="parent"
+            android:text="Audiodetection">
-        app:layout_constraintEnd_toEndOf="parent"
+        </Button>
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="@+id/textView" />
 
+        <Button
+            android:id="@+id/videodetectionButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="Videodetection">
+        </Button>
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+        <Button
+            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

@@ -0,0 +1,25 @@
+<?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

@@ -0,0 +1,25 @@
+<?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>

build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
-    id 'com.android.application' version '8.0.0' apply false
+    id 'com.android.application' version '7.1.3' apply false
-    id 'com.android.library' version '8.0.0' apply false
+    id 'com.android.library' version '7.1.3' apply false
 }
 
 task clean(type: Delete) {

gradle.properties

@@ -18,6 +18,4 @@ android.useAndroidX=true
 # Enables namespacing of each library's R class so that its R class includes only the
 # resources declared in the library itself and none from the library's dependencies,
 # thereby reducing the size of the R class for that library
-android.nonTransitiveRClass=true
+android.nonTransitiveRClass=true
-android.defaults.buildfeatures.buildconfig=true
-android.nonFinalResIds=false

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Thu May 11 14:50:16 CEST 2023
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.0-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME