Add Microfon and Accelerometer Aktivity to Project

app/src/main/AndroidManifest.xml

@@ -4,6 +4,7 @@
 
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.CAMERA"/>
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
 
     <uses-feature android:name="android.hardware.camera"/>
 
@@ -29,9 +30,6 @@
         <activity
             android:name=".AccelerometerActivity"
             android:exported="false" />
-        <activity
-            android:name=".VideoPreviewActivity"
-            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true">

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

@@ -1,27 +1,111 @@
 package com.example.greenwatch;
 
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
 
+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.adapters.AlarmHistoryListAdapter;
+import com.example.greenwatch.adapters.DeviceListAdapter;
+import com.example.greenwatch.models.Device;
+import com.example.greenwatch.viewmodels.AccelerometerViewModel;
+import com.example.greenwatch.viewmodels.MicrofonViewModel;
+
+import java.util.List;
 
 public class AudiodetectionActivity extends AppCompatActivity {
-
+    private TextView microfonStatusMessage;
     private Button backToMainActivityButton;
+    private MicrofonViewModel mMicrofonViewModel;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_audiodetection);
 
+        microfonStatusMessage = (TextView) findViewById(R.id.tvAudiodetectionStatusmessage);
         backToMainActivityButton = (Button) findViewById(R.id.audiodetectorBackToMainActivity);
 
+        RecyclerView recyclerView = findViewById(R.id.deviceListRecyclerView);
+        recyclerView.setLayoutManager(new LinearLayoutManager(this));
+        recyclerView.setHasFixedSize(true);
+
+        final DeviceListAdapter deviceListAdapter = new DeviceListAdapter();
+        recyclerView.setAdapter(deviceListAdapter);
+
+        RecyclerView alarmHistoryListRecyclerView = findViewById(R.id.alarmHistoryListRecyclerView);
+        alarmHistoryListRecyclerView.setLayoutManager(new LinearLayoutManager(this));
+        alarmHistoryListRecyclerView.setHasFixedSize(true);
+
+        final AlarmHistoryListAdapter alarmHistoryListAdapter  = new AlarmHistoryListAdapter();
+        alarmHistoryListRecyclerView.setAdapter(alarmHistoryListAdapter);
+
         backToMainActivityButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 finish();
             }
         });
+
+        mMicrofonViewModel = new ViewModelProvider(this).get(MicrofonViewModel.class);
+        mMicrofonViewModel.init();
+        mMicrofonViewModel.getConnectedDeviceList().observe(this, new Observer<List<Device>>() {
+            @Override
+            public void onChanged(List<Device> devices) {
+                deviceListAdapter.setDevices(devices);
+            }
+        });
+
+        mMicrofonViewModel.getAlarmHistoryList().observe(this, new Observer<List<Device>>() {
+            @Override
+            public void onChanged(List<Device> devices) {
+                alarmHistoryListAdapter.setAlarmHistoryList(devices);
+            }
+        });
+
+        mMicrofonViewModel.getStartAlarmRecording().observe(this, new Observer<Boolean>() {
+            @Override
+            public void onChanged(Boolean aBoolean) {
+                if (aBoolean) {
+                    Toast.makeText(AudiodetectionActivity.this, "Start Alarm Recording", Toast.LENGTH_LONG).show();
+                }
+                else {
+                    Toast.makeText(AudiodetectionActivity.this, "Stop Alarm Recording", Toast.LENGTH_LONG).show();
+                }
+            }
+        });
+
+        mMicrofonViewModel.getMicrofonAlarmDetected().observe(this, new Observer<Boolean>() {
+            @Override
+            public void onChanged(Boolean aBoolean) {
+                if (aBoolean) {
+                    mMicrofonViewModel.updateDevice(mMicrofonViewModel.getLocalDeviceUUID(), mMicrofonViewModel.getSystemTimeStamp(), true, "Microfon", (int) mMicrofonViewModel.getAmplitudeInDB());
+                }
+                else {
+                    mMicrofonViewModel.updateDevice(mMicrofonViewModel.getLocalDeviceUUID(), mMicrofonViewModel.getSystemTimeStamp(), false, "Microfon", (int) mMicrofonViewModel.getAmplitudeInDB());
+                }
+
+            }
+        });
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        mMicrofonViewModel.startMicrofonSensor();
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        mMicrofonViewModel.stopMicrofonSensor();
     }
 }

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

@@ -1,13 +1,34 @@
 package com.example.greenwatch;
 
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
 
+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;
 
-public class AudiodetectionAndAccelerometerActivity extends AppCompatActivity {
+import com.example.greenwatch.adapters.AlarmHistoryListAdapter;
+import com.example.greenwatch.adapters.DeviceListAdapter;
+import com.example.greenwatch.models.Device;
+import com.example.greenwatch.viewmodels.AudiodetectionAndAccelerometerViewModel;
+import com.example.greenwatch.viewmodels.VideodetectionAndAccelerometerViewModel;
 
+import java.util.List;
+
+public class AudiodetectionAndAccelerometerActivity extends AppCompatActivity implements SensorEventListener {
+    private SensorManager accelerometerManager;
+    private Sensor accelerometerSensor;
+    private TextView audiodetectionAndAccelerometerStatusMessage;
+    private AudiodetectionAndAccelerometerViewModel mAudiodetectionAndAccelerometerViewModel;
     private Button backToMainActivity;
 
     @Override
@@ -15,13 +36,126 @@ public class AudiodetectionAndAccelerometerActivity extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_audiodetection_and_accelerometer);
 
+        audiodetectionAndAccelerometerStatusMessage = (TextView) findViewById(R.id.tvAudiodetectionAndAccelerometerStatusmessage);
         backToMainActivity = (Button) findViewById(R.id.audiodetectionAndAccelerometerBackToMainActivity);
 
+        RecyclerView recyclerView = findViewById(R.id.deviceListRecyclerView);
+        recyclerView.setLayoutManager(new LinearLayoutManager(this));
+        recyclerView.setHasFixedSize(true);
+
+        final DeviceListAdapter deviceListAdapter = new DeviceListAdapter();
+        recyclerView.setAdapter(deviceListAdapter);
+
+        RecyclerView alarmHistoryListRecyclerView = findViewById(R.id.alarmHistoryListRecyclerView);
+        alarmHistoryListRecyclerView.setLayoutManager(new LinearLayoutManager(this));
+        alarmHistoryListRecyclerView.setHasFixedSize(true);
+
+        final AlarmHistoryListAdapter alarmHistoryListAdapter  = new AlarmHistoryListAdapter();
+        alarmHistoryListRecyclerView.setAdapter(alarmHistoryListAdapter);
+
         backToMainActivity.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 finish();
             }
         });
+
+        mAudiodetectionAndAccelerometerViewModel = new ViewModelProvider(this).get(AudiodetectionAndAccelerometerViewModel.class);
+        mAudiodetectionAndAccelerometerViewModel.init();
+        mAudiodetectionAndAccelerometerViewModel.getConnectedDeviceList().observe(this, new Observer<List<Device>>() {
+            @Override
+            public void onChanged(List<Device> devices) {
+                deviceListAdapter.setDevices(devices);
+            }
+        });
+
+        mAudiodetectionAndAccelerometerViewModel.getAlarmHistoryList().observe(this, new Observer<List<Device>>() {
+            @Override
+            public void onChanged(List<Device> devices) {
+                alarmHistoryListAdapter.setAlarmHistoryList(devices);
+            }
+        });
+
+        mAudiodetectionAndAccelerometerViewModel.getStartAlarmRecording().observe(this, new Observer<Boolean>() {
+            @Override
+            public void onChanged(Boolean aBoolean) {
+                if (aBoolean) {
+                    Toast.makeText(AudiodetectionAndAccelerometerActivity.this, "Start Alarm Recording", Toast.LENGTH_LONG).show();
+                }
+                else {
+                    Toast.makeText(AudiodetectionAndAccelerometerActivity.this, "Stop Alarm Recording", Toast.LENGTH_LONG).show();
+                }
+            }
+        });
+
+        mAudiodetectionAndAccelerometerViewModel.getAudiodetectionAndAccelerometerAlarmDetected().observe(this, new Observer<Boolean>() {
+            @Override
+            public void onChanged(Boolean aBoolean) {
+                if (aBoolean) {
+                    if (mAudiodetectionAndAccelerometerViewModel.getAccelerometerAlarmDetected()) {
+                        mAudiodetectionAndAccelerometerViewModel.updateDevice(mAudiodetectionAndAccelerometerViewModel.getLocalDeviceUUID(), mAudiodetectionAndAccelerometerViewModel.getSystemTimeStamp(), true, "Accelerometer", 10);
+                    }
+                    else if (mAudiodetectionAndAccelerometerViewModel.getMicrofonAlarmDetected()) {
+                        mAudiodetectionAndAccelerometerViewModel.updateDevice(mAudiodetectionAndAccelerometerViewModel.getLocalDeviceUUID(), mAudiodetectionAndAccelerometerViewModel.getSystemTimeStamp(), true, "Microfon", (int) mAudiodetectionAndAccelerometerViewModel.getAmplitudeInDB());
+                    }
+                }
+                else {
+                    mAudiodetectionAndAccelerometerViewModel.updateDevice(mAudiodetectionAndAccelerometerViewModel.getLocalDeviceUUID(), mAudiodetectionAndAccelerometerViewModel.getSystemTimeStamp(), false, "AudioAndAccelerometer", 0);
+                }
+
+            }
+        });
+
+        accelerometerManager = (SensorManager) getSystemService(SENSOR_SERVICE);
+        if (accelerometerManager.getSensorList(Sensor.TYPE_GYROSCOPE).size() == 0) {
+            accelerometerSensor = null;
+            Toast.makeText(AudiodetectionAndAccelerometerActivity.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]);
+        audiodetectionAndAccelerometerStatusMessage.setText(sb.toString());
+        mAudiodetectionAndAccelerometerViewModel.addValueToGesamtBE(event.values[0] + event.values[1] + event.values[2]);
+        mAudiodetectionAndAccelerometerViewModel.meanValueCalculation();
+        mAudiodetectionAndAccelerometerViewModel.calibrateAccelerometerSensor();
+        mAudiodetectionAndAccelerometerViewModel.checkAlarmCondition();
+    }
+
+    @Override
+    public void onAccuracyChanged(Sensor sensor, int accuracy) {
+
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        mAudiodetectionAndAccelerometerViewModel.startMicrofonSensor();
+        if (accelerometerSensor != null) {
+            if (accelerometerManager.registerListener(this, accelerometerSensor, SensorManager.SENSOR_DELAY_GAME)) {
+                Toast.makeText(AudiodetectionAndAccelerometerActivity.this, "We registered to the sensor", Toast.LENGTH_LONG).show();
+            } else {
+                Toast.makeText(AudiodetectionAndAccelerometerActivity.this, "Registration did not work", Toast.LENGTH_LONG).show();
+            }
+        }
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        mAudiodetectionAndAccelerometerViewModel.stopMicrofonSensor();
+        if (accelerometerSensor != null) {
+            accelerometerManager.unregisterListener(this, accelerometerSensor);
+        }
     }
 }

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

@@ -27,7 +27,6 @@ public class MainActivity extends AppCompatActivity {
     private Button audiodetectionAndAccelerometerButton;
     private Button videodetectionAndAccelerometerButton;
     private Button connectionButton;
-    private Button prewview_kamera;
     private MainActivityViewModel mMainActivityViewModel;
 
     @Override
@@ -41,7 +40,6 @@ public class MainActivity extends AppCompatActivity {
         audiodetectionAndAccelerometerButton = (Button) findViewById(R.id.audiodetectionAndAccelerometerButton);
         videodetectionAndAccelerometerButton = (Button) findViewById(R.id.videodetectionAndAccelerometerButton);
         connectionButton = (Button) findViewById(R.id.connectionButton);
-        prewview_kamera = (Button) findViewById(R.id.preview_kamera);
 
         RecyclerView deviceListRecyclerView = findViewById(R.id.deviceListRecyclerView);
         deviceListRecyclerView.setLayoutManager(new LinearLayoutManager(this));
@@ -60,6 +58,7 @@ public class MainActivity extends AppCompatActivity {
         mMainActivityViewModel = new ViewModelProvider(this).get(MainActivityViewModel.class);
         mMainActivityViewModel.init();
         mMainActivityViewModel.accessRequestCamera(this);
+        mMainActivityViewModel.accessRequestMicrofon(this);
         mMainActivityViewModel.getConnectedDeviceList().observe(this, new Observer<List<Device>>() {
             @Override
             public void onChanged(List<Device> devices) {
@@ -86,22 +85,15 @@ public class MainActivity extends AppCompatActivity {
             }
         });
 
-        prewview_kamera.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                if (mMainActivityViewModel.isCameraAccessAllowed(MainActivity.this)) {
-                    openVideoPrewvoewActivity();
-                }
-                else {
-                    mMainActivityViewModel.accessRequestCamera(MainActivity.this);
-                }
-            }
-        });
         audiodetectionButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                //openAudiodetectionActivity();
-                mMainActivityViewModel.updateDevice(mMainActivityViewModel.getLocalDeviceUUID(), "10:51",  false, "Audio", 10);
+                if (mMainActivityViewModel.isMicrofonAccessAllowed(MainActivity.this)) {
+                    openAudiodetectionActivity();
+                }
+                else {
+                    mMainActivityViewModel.accessRequestMicrofon(MainActivity.this);
+                }
             }
         });
         videodetectionButton.setOnClickListener(new View.OnClickListener() {
@@ -125,10 +117,12 @@ public class MainActivity extends AppCompatActivity {
         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");
+                if (mMainActivityViewModel.isMicrofonAccessAllowed(MainActivity.this)) {
+                    openAudiodetectionAndAccelerometerActivity();
+                }
+                else {
+                    mMainActivityViewModel.accessRequestMicrofon(MainActivity.this);
+                }
             }
         });
         videodetectionAndAccelerometerButton.setOnClickListener(new View.OnClickListener() {
@@ -144,10 +138,6 @@ public class MainActivity extends AppCompatActivity {
             }
         });
     }
-    public void openVideoPrewvoewActivity() {
-        Intent intent = new Intent(this, VideoPreviewActivity.class);
-        startActivity(intent);
-    }
     public void openAudiodetectionActivity(){
         Intent intent = new Intent(this, AudiodetectionActivity.class);
         startActivity(intent);

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

@@ -1,61 +0,0 @@
-package com.example.greenwatch;
-
-import android.os.Bundle;
-import android.util.Size;
-import android.widget.Button;
-
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.camera.core.CameraSelector;
-import androidx.camera.core.ImageAnalysis;
-import androidx.camera.core.ImageProxy;
-import androidx.camera.core.Preview;
-import androidx.camera.lifecycle.ProcessCameraProvider;
-import androidx.camera.view.PreviewView;
-import androidx.core.content.ContextCompat;
-import androidx.lifecycle.LifecycleOwner;
-
-import com.google.common.util.concurrent.ListenableFuture;
-
-import java.util.concurrent.ExecutionException;
-
-public class VideoPreviewActivity extends AppCompatActivity {
-
-    private Button backToMainActivity;
-    private PreviewView previewView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_preview_kamera);
-
-        backToMainActivity = (Button) findViewById(R.id.videodetectorBackToMainActivity);
-        previewView = findViewById(R.id.previewView);
-
-        backToMainActivity.setOnClickListener(v -> finish());
-
-
-        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::close);
-
-        Preview preview = new Preview.Builder().build();
-        CameraSelector cameraSelector = new CameraSelector.Builder().requireLensFacing(CameraSelector.LENS_FACING_BACK).build();
-        preview.setSurfaceProvider(previewView.getSurfaceProvider());
-        cameraProvider.bindToLifecycle((LifecycleOwner) this, cameraSelector, imageAnalysis, preview);
-    }
-}

app/src/main/java/com/example/greenwatch/sensors/MicrofonHelperClasses/GleitenderMittelwert.java

@@ -0,0 +1,23 @@
+package com.example.greenwatch.sensors.MicrofonHelperClasses;
+
+public class GleitenderMittelwert {
+    private final float wichtungNeuerWert;
+    private final float wichtungAlterWert;
+    private float mittelwert = 0;
+
+    private boolean istMittelwertGesetzt = false;
+
+    public GleitenderMittelwert(float wichtungNeuerWert) {
+        this.wichtungNeuerWert = wichtungNeuerWert;
+        this.wichtungAlterWert = 1 - this.wichtungNeuerWert;
+    }
+
+    public float mittel(float wert) {
+        if (istMittelwertGesetzt) {
+            mittelwert = wert * wichtungNeuerWert + mittelwert * wichtungAlterWert;
+        } else {
+            mittelwert = wert;
+            istMittelwertGesetzt = true;
+        }
+        return mittelwert;
+    }}

app/src/main/java/com/example/greenwatch/sensors/MicrofonHelperClasses/RingPuffer.java

@@ -0,0 +1,38 @@
+package com.example.greenwatch.sensors.MicrofonHelperClasses;
+
+public class RingPuffer {
+
+    private short[] puffer;
+    private final int laenge;
+    private int anzahlEnthaltenerDaten;
+    private int position;
+
+
+    public RingPuffer(int n) {
+        laenge = n;
+        anzahlEnthaltenerDaten = 0;
+        position = 0;
+        puffer = new short[laenge];
+    }
+
+    public void hinzufuegen(short wert) {
+        puffer[position] = wert;
+        position++;
+        if (position >= laenge) {
+            position = 0;
+        }
+        if (anzahlEnthaltenerDaten < laenge) {
+            anzahlEnthaltenerDaten++;
+        }
+    }
+
+    public short maximum() {
+        short max = 0;
+        for (int i = 0; i < anzahlEnthaltenerDaten; i++) {
+            if (puffer[i] > max) {
+                max = puffer[i];
+            }
+        }
+        return max;
+    }
+}

app/src/main/java/com/example/greenwatch/sensors/MicrofonHelperClasses/Verarbeitungsergebnis.java

@@ -0,0 +1,37 @@
+package com.example.greenwatch.sensors.MicrofonHelperClasses;
+
+public class Verarbeitungsergebnis {
+    private String status;
+    private short maxAmp;
+    private float db;
+    //
+    public Verarbeitungsergebnis(String status, short maxAmp, int db) {
+        this.status = status;
+        this.maxAmp = maxAmp;
+        this.db = db;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+
+    public short getMaxAmp() {
+        return maxAmp;
+    }
+
+    public void setMaxAmp(short maxAmp) {
+        this.maxAmp = maxAmp;
+    }
+
+    public float getDB() {
+        return db;
+    }
+
+    public void setDB(float db) {
+        this.db = db;
+    }
+}

app/src/main/java/com/example/greenwatch/sensors/MicrofonSensor.java

@@ -0,0 +1,202 @@
+package com.example.greenwatch.sensors;
+
+import android.media.AudioFormat;
+import android.media.AudioRecord;
+import android.media.MediaRecorder;
+import android.os.AsyncTask;
+
+import androidx.lifecycle.MutableLiveData;
+
+import com.example.greenwatch.sensors.MicrofonHelperClasses.GleitenderMittelwert;
+import com.example.greenwatch.sensors.MicrofonHelperClasses.RingPuffer;
+import com.example.greenwatch.sensors.MicrofonHelperClasses.Verarbeitungsergebnis;
+
+ public class MicrofonSensor {
+
+     private MutableLiveData<Boolean> mMicrofonAlarmDetected = new MutableLiveData<>();
+     private AufnahmeTask aufnahmeTask;
+     private static MicrofonSensor microfonSensorInstance;
+     private boolean microfonAlarmDetected = false;
+     private boolean kalibrierung_do = true;
+     private float threshold = 40;
+     private float sensitivity = 5;
+
+     private float amplitudeInDB = 0;
+
+     private RingPuffer ringPuffer = new RingPuffer(10);
+
+     private MicrofonSensor() {
+     }
+
+     public static synchronized MicrofonSensor getInstance() {
+         if (microfonSensorInstance == null){
+             microfonSensorInstance = new MicrofonSensor();
+         }
+         return microfonSensorInstance;
+     }
+
+     public void start() {
+         aufnahmeTask = new AufnahmeTask();
+         aufnahmeTask.execute();
+     }
+
+     public void stop() {
+         if(aufnahmeTask !=null) {
+             aufnahmeTask.cancel(true);
+             aufnahmeTask = null;
+         }
+     }
+
+     public void doRecalibration() {
+         stop();
+         microfonAlarmDetected = false;
+         kalibrierung_do = true;
+         threshold = 40;
+         sensitivity = 5;
+         amplitudeInDB = 0;
+         start();
+     }
+
+     public float getAmplitudeInDB() {
+         return amplitudeInDB;
+     }
+
+     private void setAmplitudeInDB(float amplitudeInDB) {
+         this.amplitudeInDB = amplitudeInDB;
+     }
+
+     public MutableLiveData<Boolean> getAccelerometerAlarmDetected() {
+         setMutableLiveDataMicrofonAlarmDetected();
+         return mMicrofonAlarmDetected;
+     }
+
+     private void setMutableLiveDataMicrofonAlarmDetected() {
+         mMicrofonAlarmDetected.setValue(microfonAlarmDetected);
+     }
+
+     class AufnahmeTask extends AsyncTask<Long, Verarbeitungsergebnis, Void> {
+         private AudioRecord recorder;
+         private final int sampleRateInHz = 44100;
+         private final int channelConfig = AudioFormat.CHANNEL_IN_MONO;
+         private final int audioFormat = AudioFormat.ENCODING_PCM_16BIT;
+         private int minPufferGroesseInBytes;
+         private int pufferGroesseInBytes;
+         public AufnahmeTask() {
+             minPufferGroesseInBytes = AudioRecord.getMinBufferSize(sampleRateInHz, channelConfig, audioFormat);
+             pufferGroesseInBytes = minPufferGroesseInBytes * 2;
+             recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRateInHz, channelConfig, audioFormat, pufferGroesseInBytes);
+         }
+         public float kalibrieren(short[] puffer){
+             try {
+                 Thread.sleep(3000);
+
+             } catch (InterruptedException e) {
+                 e.printStackTrace();
+             }
+             int anzahlIterationen = 100;
+             float sum = 0.0f;
+             for(int i = 0; i < anzahlIterationen; i++){
+                 int z = recorder.read(puffer, 0, puffer.length);
+                 Verarbeitungsergebnis kalibrierung = verarbeiten(puffer, z);
+                 sum += kalibrierung.getDB();
+             }
+             return sum/anzahlIterationen;
+         }
+
+         public void Detektion(Verarbeitungsergebnis ergebnis){
+             if(ergebnis.getDB() >= (threshold+sensitivity)){
+                 microfonAlarmDetected = true;
+             }
+             else if (ergebnis.getDB() <= (threshold)) {
+                 microfonAlarmDetected = false;
+             }
+         }
+
+         @Override
+         protected Void doInBackground(Long... params) {
+
+             recorder.startRecording();
+             short[] puffer = new short[pufferGroesseInBytes / 2];
+             GleitenderMittelwert gleitenderMittelwertdB = new GleitenderMittelwert(0.2f);
+             float db = 0.0f;
+
+             //kalibrierung
+             if(kalibrierung_do){
+                 threshold = kalibrieren(puffer);
+                 kalibrierung_do = false;
+             }
+
+
+             for (; ; ) {
+                 if (isCancelled()) {
+                     break;
+                 }
+                 else {
+                     //ergebnis ermitteln
+                     int n = recorder.read(puffer, 0, puffer.length);
+                     Verarbeitungsergebnis ergebnis = verarbeiten(puffer, n);
+
+                     //Mittelwertberechnnung
+                     db = ergebnis.getDB();
+                     db = gleitenderMittelwertdB.mittel(db);
+                     ergebnis.setDB(db);
+
+                     //Db Wert mit Schwellwert vergleichen und Warnung setzen
+                     Detektion(ergebnis);
+                     publishProgress(ergebnis);
+
+                     try {
+                         Thread.sleep(10);
+                     } catch (InterruptedException e) {
+                         e.printStackTrace();
+                     }
+                 }
+             }
+             recorder.release();
+             return null;
+         }
+
+         private Verarbeitungsergebnis verarbeiten(short[] daten, int n) {
+             String status;
+             short maxAmp = -1;
+             int db = 0, db_wert = 0;
+
+             if (n == AudioRecord.ERROR_INVALID_OPERATION) {
+                 status = "ERROR_INVALID_OPERATION";
+             } else if (n == AudioRecord.ERROR_BAD_VALUE) {
+                 status = "ERROR_BAD_VALUE";
+             } else {
+                 status = "OK";
+                 short max = 0;
+                 for (int i = 0; i < n; i++) {
+                     if (daten[i] > max) {
+                         max = daten[i];
+                     }
+                 }
+                 ringPuffer.hinzufuegen(max);
+                 maxAmp = ringPuffer.maximum();
+             }
+             //Umwandlung Amplitudenwert in dB
+             db_wert = (int) (20*Math.log10(maxAmp));
+             if (db_wert > 0){
+                 db = db_wert;
+             }
+
+
+             return new Verarbeitungsergebnis(status, maxAmp, db);
+         }
+         @Override
+         protected void onProgressUpdate(Verarbeitungsergebnis... progress) {
+             super.onProgressUpdate(progress);
+
+             setAmplitudeInDB(progress[0].getDB());
+
+             if (microfonAlarmDetected != mMicrofonAlarmDetected.getValue()){
+                 setMutableLiveDataMicrofonAlarmDetected();
+             }
+             //textViewMaxAmpdb.setText("" + progress[0].db);
+         }
+
+     }
+}
+

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

@@ -11,7 +11,6 @@ import com.example.greenwatch.sensors.AccelerometerSensor;
 import java.util.List;
 
 public class AccelerometerViewModel extends ViewModel implements ViewModelInterface {
-
     private MutableLiveData<List<Device>> mDeviceList;
     private MutableLiveData<Boolean> mAccelerometerAlarmDetected;
     private MutableLiveData<List<Device>> mAlarmHistoryList;

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

@@ -0,0 +1,226 @@
+package com.example.greenwatch.viewmodels;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModel;
+
+import com.example.greenwatch.models.Device;
+import com.example.greenwatch.repositories.DeviceRepository;
+import com.example.greenwatch.sensors.AccelerometerSensor;
+import com.example.greenwatch.sensors.MicrofonSensor;
+
+import java.util.List;
+
+public class AudiodetectionAndAccelerometerViewModel extends ViewModel implements ViewModelInterface {
+    private MutableLiveData<List<Device>> mDeviceList;
+    private MutableLiveData<Boolean> mAccelerometerAlarmDetected;
+    private MutableLiveData<Boolean> mMicrofonAlarmDetected;
+    private MutableLiveData<Boolean> mAudiodetectionAndAccelerometerAlarmDetected = new MutableLiveData<>();
+    private MutableLiveData<List<Device>> mAlarmHistoryList;
+    private MutableLiveData<Boolean> mStartAlarmRecording;
+    private AccelerometerSensor mAccelerometerSensor;
+    private MicrofonSensor mMicrofonSensor;
+    private DeviceRepository mDeviceRepository;
+    private boolean microfonAlarmDetected;
+    private boolean accelerometerAlarmDetected;
+    private boolean microfondetectionAndAccelerometerAlarmDetected;
+
+    @Override
+    public void init() {
+        if (mDeviceRepository == null) {
+            mDeviceRepository = DeviceRepository.getInstance();
+        }
+        if (mAccelerometerSensor == null) {
+            mAccelerometerSensor = AccelerometerSensor.getInstance();
+        }
+        if (mMicrofonSensor == null) {
+            mMicrofonSensor = MicrofonSensor.getInstance();
+        }
+        if (mDeviceList == null) {
+            mDeviceList = mDeviceRepository.getConnectedDeviceList();
+        }
+        if (mAlarmHistoryList == null) {
+            mAlarmHistoryList = mDeviceRepository.getAlarmHistoryDeviceList();
+        }
+        if (mStartAlarmRecording == null) {
+            mStartAlarmRecording = mDeviceRepository.getStartAlarmRecording();
+        }
+        if (mAccelerometerAlarmDetected == null) {
+            mAccelerometerAlarmDetected = mAccelerometerSensor.getAccelerometerAlarmDetected();
+        }
+        if (mMicrofonAlarmDetected == null) {
+            mMicrofonAlarmDetected = mMicrofonSensor.getAccelerometerAlarmDetected();
+        }
+        microfondetectionAndAccelerometerAlarmDetected = false;
+        accelerometerAlarmDetected = false;
+        microfonAlarmDetected = false;
+        registerAlarmObserver();
+    }
+
+    public void addValueToGesamtBE(float newValue) {
+        mAccelerometerSensor.addValueToGesamtBE(newValue);
+    }
+
+    public void meanValueCalculation() {
+        mAccelerometerSensor.meanValueCalculation();
+    }
+
+    public void calibrateAccelerometerSensor() {
+        mAccelerometerSensor.calibrateAccelerometerSensor();
+    }
+
+    public void checkAlarmCondition() {
+        mAccelerometerSensor.checkAlarmCondition();
+    }
+
+    public LiveData<Boolean> getAudiodetectionAndAccelerometerAlarmDetected() {
+        setMutableLiveDataMicrofondetectionAndAccelerometerAlarmDetected();
+        return mAudiodetectionAndAccelerometerAlarmDetected;
+    }
+
+    public void startMicrofonSensor() {
+        mMicrofonSensor.start();
+    }
+
+    public void stopMicrofonSensor() {
+        mMicrofonSensor.stop();
+    }
+
+    public void recalibrationMicrofonSensor() {
+        mMicrofonSensor.doRecalibration();
+    }
+
+    public float getAmplitudeInDB() {
+        return mMicrofonSensor.getAmplitudeInDB();
+    }
+
+    private void setMutableLiveDataMicrofondetectionAndAccelerometerAlarmDetected() {
+        mAudiodetectionAndAccelerometerAlarmDetected.setValue(microfondetectionAndAccelerometerAlarmDetected);
+    }
+
+    private void setAccelerometerAlarmDetected(boolean accelerometerAlarmDetected) {
+        this.accelerometerAlarmDetected = accelerometerAlarmDetected;
+    }
+
+    public boolean getAccelerometerAlarmDetected() {
+        return accelerometerAlarmDetected;
+    }
+
+    private void setMicrofonAlarmDetected(boolean microfonAlarmDetected) {
+        this.microfonAlarmDetected = microfonAlarmDetected;
+    }
+
+    public boolean getMicrofonAlarmDetected() {
+        return microfonAlarmDetected;
+    }
+
+    Observer<Boolean> observer = new Observer<Boolean>() {
+        @Override
+        public void onChanged(Boolean aBoolean) {
+            setAccelerometerAlarmDetected(mAccelerometerAlarmDetected.getValue());
+            setMicrofonAlarmDetected(mMicrofonAlarmDetected.getValue());
+            if (microfonAlarmDetected || accelerometerAlarmDetected && !microfondetectionAndAccelerometerAlarmDetected) {
+                microfondetectionAndAccelerometerAlarmDetected = true;
+                setMutableLiveDataMicrofondetectionAndAccelerometerAlarmDetected();
+
+            }
+            else if (!microfonAlarmDetected && !accelerometerAlarmDetected && microfondetectionAndAccelerometerAlarmDetected) {
+                microfondetectionAndAccelerometerAlarmDetected = false;
+                setMutableLiveDataMicrofondetectionAndAccelerometerAlarmDetected();
+            }
+        }
+    };
+
+    private void registerAlarmObserver() {
+        mMicrofonAlarmDetected.observeForever(observer);
+        mAccelerometerAlarmDetected.observeForever(observer);
+    }
+
+    @Override
+    protected void onCleared() {
+        super.onCleared();
+        mMicrofonAlarmDetected.removeObserver(observer);
+        mAccelerometerAlarmDetected.removeObserver(observer);
+    }
+
+    @Override
+    public LiveData<List<Device>> getConnectedDeviceList() {
+        return mDeviceList;
+    }
+
+    @Override
+    public LiveData<List<Device>> getAlarmHistoryList() {
+        return mAlarmHistoryList;
+    }
+
+    @Override
+    public LiveData<Boolean> getStartAlarmRecording() {
+        return mStartAlarmRecording;
+    }
+
+    @Override
+    public void updateDevice(String deviceID, String timeStamp, boolean sensorStatus, String sensorType, int sensorMassage) {
+        mDeviceRepository.updateDevice(deviceID, timeStamp, sensorStatus, sensorType, sensorMassage);
+    }
+
+    @Override
+    public void setTimeStamp(String deviceID, String timeStamp) {
+        mDeviceRepository.setTimeStamp(deviceID, timeStamp);
+    }
+
+    @Override
+    public String getTimeStamp(String deviceID) {
+        return mDeviceRepository.getTimeStamp(deviceID);
+    }
+
+    @Override
+    public void setDeviceID(String deviceID, String newDeviceID) {
+        mDeviceRepository.setDeviceID(deviceID, newDeviceID);
+    }
+
+    @Override
+    public String getDeviceID(String deviceID) {
+        return mDeviceRepository.getDeviceID(deviceID);
+    }
+
+    @Override
+    public void setSensorStatus(String deviceID, boolean sensorStatus) {
+        mDeviceRepository.setSensorStatus(deviceID, sensorStatus);
+    }
+
+    @Override
+    public boolean getSensorStatus(String deviceID) {
+        return mDeviceRepository.getSensorStatus(deviceID);
+    }
+
+    @Override
+    public void setSensorType(String deviceID, String sensorType) {
+        mDeviceRepository.setSensorType(deviceID, sensorType);
+    }
+
+    @Override
+    public String getSensorType(String deviceID) {
+        return mDeviceRepository.getSensorType(deviceID);
+    }
+
+    @Override
+    public void setSensorMassage(String deviceID, int sensorMessage) {
+        mDeviceRepository.setSensorMassage(deviceID, sensorMessage);
+    }
+
+    @Override
+    public int getSensorMassage(String deviceID) {
+        return mDeviceRepository.getSensorMassage(deviceID);
+    }
+
+    @Override
+    public String getLocalDeviceUUID() {
+        return mDeviceRepository.getLocalDeviceUUID();
+    }
+
+    @Override
+    public String getSystemTimeStamp() {
+        return mDeviceRepository.getSystemTimeStamp();
+    }
+}

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

@@ -1,5 +1,6 @@
 package com.example.greenwatch.viewmodels;
 
+import android.Manifest;
 import android.app.Activity;
 import android.content.Context;
 import android.content.pm.PackageManager;
@@ -23,6 +24,7 @@ public class MainActivityViewModel extends ViewModel implements ViewModelInterfa
     private MutableLiveData<Boolean> mStartAlarmRecording;
     private DeviceRepository mDeviceRepository;
     private static final int RIGHTS_REQUEST_CAMERA = 10;
+    private static final int RIGHTS_REQUEST_CAMERA_MICROFON = 1;
 
     @Override
     public void init() {
@@ -41,6 +43,14 @@ public class MainActivityViewModel extends ViewModel implements ViewModelInterfa
         mStartAlarmRecording = mDeviceRepository.getStartAlarmRecording();
     }
 
+    public boolean isMicrofonAccessAllowed(Context context) {
+        return ContextCompat.checkSelfPermission(context, android.Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED;
+    }
+
+    public void accessRequestMicrofon(Activity activity) {
+        ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.RECORD_AUDIO}, RIGHTS_REQUEST_CAMERA_MICROFON);
+    }
+
     public boolean isCameraAccessAllowed(Context context) {
         return ContextCompat.checkSelfPermission(context, android.Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED;
     }

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

@@ -0,0 +1,142 @@
+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 com.example.greenwatch.sensors.MicrofonSensor;
+
+import java.util.List;
+
+public class MicrofonViewModel extends ViewModel implements ViewModelInterface {
+    private MutableLiveData<List<Device>> mDeviceList;
+    private MutableLiveData<Boolean> mMicrofonAlarmDetected;
+    private MutableLiveData<List<Device>> mAlarmHistoryList;
+    private MutableLiveData<Boolean> mStartAlarmRecording;
+    private MicrofonSensor mMicrofonSensor;
+    private DeviceRepository mDeviceRepository;
+
+    @Override
+    public void init() {
+        if (mDeviceRepository == null) {
+            mDeviceRepository = DeviceRepository.getInstance();
+        }
+        if (mMicrofonSensor == null) {
+            mMicrofonSensor = MicrofonSensor.getInstance();
+        }
+        if (mDeviceList == null) {
+            mDeviceList = mDeviceRepository.getConnectedDeviceList();
+        }
+        if (mAlarmHistoryList == null) {
+            mAlarmHistoryList = mDeviceRepository.getAlarmHistoryDeviceList();
+        }
+        if (mStartAlarmRecording == null) {
+            mStartAlarmRecording = mDeviceRepository.getStartAlarmRecording();
+        }
+        if (mMicrofonAlarmDetected == null) {
+            mMicrofonAlarmDetected = mMicrofonSensor.getAccelerometerAlarmDetected();
+        }
+    }
+
+    public void startMicrofonSensor() {
+        mMicrofonSensor.start();
+    }
+
+    public void stopMicrofonSensor() {
+        mMicrofonSensor.stop();
+    }
+
+    public void recalibrationMicrofonSensor() {
+        mMicrofonSensor.doRecalibration();
+    }
+
+    public float getAmplitudeInDB() {
+        return mMicrofonSensor.getAmplitudeInDB();
+    }
+
+    public LiveData<Boolean> getMicrofonAlarmDetected() {
+        return mMicrofonAlarmDetected;
+    }
+
+    @Override
+    public LiveData<List<Device>> getConnectedDeviceList() {
+        return mDeviceList;
+    }
+
+    @Override
+    public LiveData<List<Device>> getAlarmHistoryList() {
+        return mAlarmHistoryList;
+    }
+
+    @Override
+    public LiveData<Boolean> getStartAlarmRecording() {
+        return mStartAlarmRecording;
+    }
+
+    @Override
+    public void updateDevice(String deviceID, String timeStamp, boolean sensorStatus, String sensorType, int sensorMassage) {
+        mDeviceRepository.updateDevice(deviceID, timeStamp, sensorStatus, sensorType, sensorMassage);
+    }
+
+    @Override
+    public void setTimeStamp(String deviceID, String timeStamp) {
+        mDeviceRepository.setTimeStamp(deviceID, timeStamp);
+    }
+
+    @Override
+    public String getTimeStamp(String deviceID) {
+        return mDeviceRepository.getTimeStamp(deviceID);
+    }
+
+    @Override
+    public void setDeviceID(String deviceID, String newDeviceID) {
+        mDeviceRepository.setDeviceID(deviceID, newDeviceID);
+    }
+
+    @Override
+    public String getDeviceID(String deviceID) {
+        return mDeviceRepository.getDeviceID(deviceID);
+    }
+
+    @Override
+    public void setSensorStatus(String deviceID, boolean sensorStatus) {
+        mDeviceRepository.setSensorStatus(deviceID, sensorStatus);
+    }
+
+    @Override
+    public boolean getSensorStatus(String deviceID) {
+        return mDeviceRepository.getSensorStatus(deviceID);
+    }
+
+    @Override
+    public void setSensorType(String deviceID, String sensorType) {
+        mDeviceRepository.setSensorType(deviceID, sensorType);
+    }
+
+    @Override
+    public String getSensorType(String deviceID) {
+        return mDeviceRepository.getSensorType(deviceID);
+    }
+
+    @Override
+    public void setSensorMassage(String deviceID, int sensorMessage) {
+        mDeviceRepository.setSensorMassage(deviceID, sensorMessage);
+    }
+
+    @Override
+    public int getSensorMassage(String deviceID) {
+        return mDeviceRepository.getSensorMassage(deviceID);
+    }
+
+    @Override
+    public String getLocalDeviceUUID() {
+        return mDeviceRepository.getLocalDeviceUUID();
+    }
+
+    @Override
+    public String getSystemTimeStamp() {
+        return mDeviceRepository.getSystemTimeStamp();
+    }
+}

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

@@ -12,7 +12,7 @@
         android:id="@+id/tvAudiodetectionStatusmessage"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="Audiodetection Activity">
+        android:text="">
     </TextView>
 
     <Button
@@ -22,4 +22,27 @@
         android:text="Back to MainActivity">
     </Button>
 
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/deviceListRecyclerView"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            tools:listitem="@layout/device_item"
+            android:layout_weight="1">
+        </androidx.recyclerview.widget.RecyclerView>
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/alarmHistoryListRecyclerView"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            tools:listitem="@layout/alarm_history_item"
+            android:layout_weight="1">
+        </androidx.recyclerview.widget.RecyclerView>
+
+    </LinearLayout>
+
 </LinearLayout>

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

@@ -22,4 +22,27 @@
         android:text="Back to MainActivity">
     </Button>
 
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/deviceListRecyclerView"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            tools:listitem="@layout/device_item"
+            android:layout_weight="1">
+        </androidx.recyclerview.widget.RecyclerView>
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/alarmHistoryListRecyclerView"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            tools:listitem="@layout/alarm_history_item"
+            android:layout_weight="1">
+        </androidx.recyclerview.widget.RecyclerView>
+
+    </LinearLayout>
+
 </LinearLayout>

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

@@ -8,12 +8,6 @@
     android:padding="10dp"
     tools:context=".MainActivity">
 
-    <Button
-        android:id="@+id/preview_kamera"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="PrewView Kamera" />
-
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/alarmHistoryListRecyclerView"
         android:layout_width="match_parent"
@@ -28,7 +22,6 @@
         android:layout_height="match_parent"
         android:layout_weight="3"
         tools:listitem="@layout/device_item">
-
     </androidx.recyclerview.widget.RecyclerView>
     
     <LinearLayout

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

@@ -1,31 +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="">
-
-    <Button
-        android:id="@+id/videodetectorBackToMainActivity"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Back to MainActivity">
-    </Button>
-
-    <FrameLayout
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:id="@+id/erklaerung">
-
-        <androidx.camera.view.PreviewView
-            android:id="@+id/previewView"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"/>
-    </FrameLayout>
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:orientation="vertical"/>
-
-</androidx.constraintlayout.widget.ConstraintLayout>