Add Microfon and Accelerometer Aktivity to Project

app/src/main/AndroidManifest.xml

@@ -3,11 +3,8 @@
     package="com.example.greenwatch">
 
     <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.CAMERA"/>
-    <uses-permission android:name="android.permission.READ_MEDIA_AUDIO" />
-    <uses-permission android:name="android.permission.READ_MEDIA_VIDEO" />
     <uses-permission android:name="android.permission.RECORD_AUDIO" />
-    <uses-permission android:name="android.permission.CAMERA" />
 
     <uses-feature android:name="android.hardware.camera"/>
 

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

@@ -11,7 +11,6 @@ import android.hardware.SensorEvent;
 import android.hardware.SensorEventListener;
 import android.hardware.SensorManager;
 import android.os.Bundle;
-import android.view.SurfaceView;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;
@@ -28,7 +27,6 @@ public class AccelerometerActivity extends AppCompatActivity implements SensorEv
 
     private SensorManager accelerometerManager;
     private Sensor accelerometerSensor;
-    private SurfaceView surfaceView;
     private TextView accelerometerStatusMessage;
     private TextView accelerometerDataTV;
     private TextView accelerometerWarningTV;
@@ -40,7 +38,6 @@ public class AccelerometerActivity extends AppCompatActivity implements SensorEv
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_accelerometer);
 
-        surfaceView = (SurfaceView) findViewById(R.id.surfaceViewAccelerometer);
         accelerometerStatusMessage = (TextView) findViewById(R.id.tvAccelerometerStatusmessage);
         accelerometerDataTV = (TextView) findViewById(R.id.tvAccelerometerData);
         accelerometerWarningTV = (TextView) findViewById(R.id.tvAccelerometerWarning);
@@ -68,7 +65,7 @@ public class AccelerometerActivity extends AppCompatActivity implements SensorEv
         });
 
         mAccelerometerViewModel = new ViewModelProvider(this).get(AccelerometerViewModel.class);
-        mAccelerometerViewModel.init(surfaceView.getHolder());
+        mAccelerometerViewModel.init();
         mAccelerometerViewModel.getConnectedDeviceList().observe(this, new Observer<List<Device>>() {
             @Override
             public void onChanged(List<Device> devices) {
@@ -87,11 +84,9 @@ public class AccelerometerActivity extends AppCompatActivity implements SensorEv
             @Override
             public void onChanged(Boolean aBoolean) {
                 if (aBoolean) {
-                    mAccelerometerViewModel.startAlarmRecording();
                     Toast.makeText(AccelerometerActivity.this, "Start Alarm Recording", Toast.LENGTH_LONG).show();
                 }
                 else {
-                    mAccelerometerViewModel.stopAlarmRecording(AccelerometerActivity.this);
                     Toast.makeText(AccelerometerActivity.this, "Stop Alarm Recording", Toast.LENGTH_LONG).show();
                 }
             }

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

@@ -8,7 +8,6 @@ import androidx.recyclerview.widget.RecyclerView;
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.view.SurfaceView;
 import android.view.View;
 import android.widget.Button;
 import android.widget.Toast;
@@ -28,7 +27,6 @@ public class MainActivity extends AppCompatActivity {
     private Button audiodetectionAndAccelerometerButton;
     private Button videodetectionAndAccelerometerButton;
     private Button connectionButton;
-    private SurfaceView surfaceView;
     private MainActivityViewModel mMainActivityViewModel;
 
     @Override
@@ -36,7 +34,6 @@ public class MainActivity extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        surfaceView = (SurfaceView) findViewById(R.id.surfaceViewMainActivity);
         audiodetectionButton = (Button) findViewById(R.id.audiodetectionButton);
         videodetectionButton = (Button) findViewById(R.id.videodetectionButton);
         accelerometerButton = (Button) findViewById(R.id.accelerometerButton);
@@ -59,10 +56,9 @@ public class MainActivity extends AppCompatActivity {
         alarmHistoryListRecyclerView.setAdapter(alarmHistoryListAdapter);
 
         mMainActivityViewModel = new ViewModelProvider(this).get(MainActivityViewModel.class);
-        mMainActivityViewModel.init(surfaceView.getHolder());
+        mMainActivityViewModel.init();
         mMainActivityViewModel.accessRequestCamera(this);
-        mMainActivityViewModel.accessRequestAudioRecording(this);
+        mMainActivityViewModel.accessRequestMicrofon(this);
-        mMainActivityViewModel.accessRequestWriteExternalStorage(this);
         mMainActivityViewModel.getConnectedDeviceList().observe(this, new Observer<List<Device>>() {
             @Override
             public void onChanged(List<Device> devices) {
@@ -81,11 +77,9 @@ public class MainActivity extends AppCompatActivity {
             @Override
             public void onChanged(Boolean aBoolean) {
                 if (aBoolean) {
-                    mMainActivityViewModel.startAlarmRecording();
                     Toast.makeText(MainActivity.this, "Start Alarm Recording", Toast.LENGTH_LONG).show();
                 }
                 else {
-                    mMainActivityViewModel.stopAlarmRecording(MainActivity.this);
                     Toast.makeText(MainActivity.this, "Stop Alarm Recording", Toast.LENGTH_LONG).show();
                 }
             }
@@ -94,8 +88,12 @@ public class MainActivity extends AppCompatActivity {
         audiodetectionButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                //openAudiodetectionActivity();
+                if (mMainActivityViewModel.isMicrofonAccessAllowed(MainActivity.this)) {
-                mMainActivityViewModel.updateDevice(mMainActivityViewModel.getLocalDeviceUUID(), "10:51",  false, "Audio", 10);
+                    openAudiodetectionActivity();
+                }
+                else {
+                    mMainActivityViewModel.accessRequestMicrofon(MainActivity.this);
+                }
             }
         });
         videodetectionButton.setOnClickListener(new View.OnClickListener() {
@@ -119,10 +117,12 @@ public class MainActivity extends AppCompatActivity {
         audiodetectionAndAccelerometerButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                //openAudiodetectionAndAccelerometerActivity();
+                if (mMainActivityViewModel.isMicrofonAccessAllowed(MainActivity.this)) {
-                mMainActivityViewModel.setSensorType(mMainActivityViewModel.getLocalDeviceUUID(), "AudiodetectionAndAccelerometer");
+                    openAudiodetectionAndAccelerometerActivity();
-                mMainActivityViewModel.setTimeStamp(mMainActivityViewModel.getLocalDeviceUUID(), "00:00");
+                }
-                mMainActivityViewModel.setDeviceID(mMainActivityViewModel.getLocalDeviceUUID(), "6789");
+                else {
+                    mMainActivityViewModel.accessRequestMicrofon(MainActivity.this);
+                }
             }
         });
         videodetectionAndAccelerometerButton.setOnClickListener(new View.OnClickListener() {
@@ -155,8 +155,8 @@ public class MainActivity extends AppCompatActivity {
         startActivity(intent);
     }
     public void openVideodetectionAndAccelerometerActivity(){
-        //Intent intent = new Intent(this, VideodetectionAndAccelerometerActivity.class);
+        Intent intent = new Intent(this, VideodetectionAndAccelerometerActivity.class);
-        //startActivity(intent);
+        startActivity(intent);
     }
     public void openConnectionActivity(){
         //Intent intent = new Intent(this, ConnectionActivity.class);

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

@@ -9,7 +9,6 @@ import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
 import android.os.Bundle;
-import android.view.SurfaceView;
 import android.view.View;
 import android.widget.Button;
 import android.widget.Toast;
@@ -27,7 +26,6 @@ import java.util.concurrent.ExecutionException;
 public class VideodetectionActivity extends AppCompatActivity {
 
     private Button backToMainActivity;
-    private SurfaceView surfaceView;
     private VideodetectionViewModel mVideoDetectionViewModel;
 
     @Override
@@ -35,7 +33,6 @@ public class VideodetectionActivity extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_videodetection);
 
-        surfaceView = (SurfaceView) findViewById(R.id.surfaceViewVideodetection);
         backToMainActivity = (Button) findViewById(R.id.videodetectorBackToMainActivity);
 
         RecyclerView recyclerView = findViewById(R.id.deviceListRecyclerView);
@@ -60,7 +57,7 @@ public class VideodetectionActivity extends AppCompatActivity {
         });
 
         mVideoDetectionViewModel = new ViewModelProvider(this).get(VideodetectionViewModel.class);
-        mVideoDetectionViewModel.init(surfaceView.getHolder());
+        mVideoDetectionViewModel.init();
         mVideoDetectionViewModel.getConnectedDeviceList().observe(this, new Observer<List<Device>>() {
             @Override
             public void onChanged(List<Device> devices) {
@@ -79,11 +76,9 @@ public class VideodetectionActivity extends AppCompatActivity {
             @Override
             public void onChanged(Boolean aBoolean) {
                 if (aBoolean) {
-                    mVideoDetectionViewModel.startAlarmRecording();
                     Toast.makeText(VideodetectionActivity.this, "Start Alarm Recording", Toast.LENGTH_LONG).show();
                 }
                 else {
-                    mVideoDetectionViewModel.stopAlarmRecording(VideodetectionActivity.this);
                     Toast.makeText(VideodetectionActivity.this, "Stop Alarm Recording", Toast.LENGTH_LONG).show();
                 }
             }

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

@@ -1,4 +1,4 @@
-/*package com.example.greenwatch;
+package com.example.greenwatch;
 
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.camera.lifecycle.ProcessCameraProvider;
@@ -168,4 +168,4 @@ public class VideodetectionAndAccelerometerActivity extends AppCompatActivity im
             accelerometerManager.unregisterListener(this, accelerometerSensor);
         }
     }
-}*/
+}

app/src/main/java/com/example/greenwatch/alarmrecorder/AlarmRecorder.java

@@ -1,251 +0,0 @@
-package com.example.greenwatch.alarmrecorder;
-
-import android.app.Activity;
-import android.content.Context;
-import android.media.MediaCodec;
-import android.media.MediaExtractor;
-import android.media.MediaFormat;
-import android.media.MediaMuxer;
-import android.media.MediaRecorder;
-import android.os.Environment;
-import android.view.SurfaceHolder;
-import android.widget.Toast;
-
-import com.example.greenwatch.MainActivity;
-import com.example.greenwatch.alarmrecorder.runnables.AudioRecorder;
-import com.example.greenwatch.alarmrecorder.runnables.VideoRecorder;
-import com.example.greenwatch.sensors.AccelerometerSensor;
-import com.example.greenwatch.sensors.CameraSensor;
-
-import java.io.File;
-import java.io.IOException;
-import java.nio.ByteBuffer;
-
-public class AlarmRecorder {
-    private static AlarmRecorder alarmRecorderInstance;
-    private boolean isRecording;
-    private String videoPath;
-    private String audioPath;
-    private MediaFormat videoFormat;
-    private MediaFormat audioFormat;
-    private MediaExtractor videoExtractor;
-    private MediaExtractor audioExtractor;
-    private Runnable audioRecorderRunnable;
-    private Runnable videoRecorderRunnable;
-    private SurfaceHolder previewHolder;
-    private MediaRecorder videoRecorder;
-    private MediaRecorder audioRecorder;
-    private Thread videoThread; // Video-Thread als Instanzvariable
-    private Thread audioThread; // Audio-Thread als Instanzvariable
-
-    private AlarmRecorder() {
-        audioRecorder = new MediaRecorder();
-        videoRecorder = new MediaRecorder();
-        videoExtractor = new MediaExtractor();
-        audioExtractor = new MediaExtractor();
-    }
-
-    public static synchronized AlarmRecorder getInstance() {
-        if (alarmRecorderInstance == null){
-            alarmRecorderInstance = new AlarmRecorder();
-        }
-        return alarmRecorderInstance;
-    }
-
-    public void setPreviewHolder(SurfaceHolder previewHolder) {
-        this.previewHolder = previewHolder;
-    }
-
-    public void startRecording() {
-        createStoragePaths(); //Speicherort und -namen für Audio- und Video-Datei
-
-        audioRecorderRunnable = new AudioRecorder(audioRecorder, audioPath);
-        videoRecorderRunnable = new VideoRecorder(videoRecorder, videoPath, previewHolder);
-        audioThread = new Thread(audioRecorderRunnable);
-        videoThread = new Thread(videoRecorderRunnable);
-
-        //Threads starten
-        videoThread.start();
-        audioThread.start();
-    }
-
-    public void stopRecording(Context context) {
-        isRecording = false;
-        try {
-            stopVideoRecording();
-            stopAudioRecording();
-
-            Toast.makeText(context, "Video- und Audioaufzeichnung beendet", Toast.LENGTH_SHORT).show();
-
-            waitTillThreadsStopped();
-            File videoFile = new File(videoPath); //Speichere das aufgenommene Video
-            File audioFile = new File(audioPath); //Speichere die aufgenommene Audio
-
-            if (videoFile.exists() && audioFile.exists()) {
-                //Wenn Video- und Audioaufzeichnung gestoppt und abgespeichert sind, beginne mit dem Mergeprozess der beiden
-                mergeVideoWithAudio();
-                Toast.makeText(context, "Video und Audio erfolgreich zusammengeführt", Toast.LENGTH_SHORT).show();
-            } else {
-                Toast.makeText(context, "Dateien wurden nicht gefunden!", Toast.LENGTH_SHORT).show();
-            }
-        } catch (RuntimeException stopException) {
-            stopException.printStackTrace();
-        }
-    }
-
-    private void createStoragePaths(){
-        //Pfade zum Zwischenspeichern der aufgenommenen Audio und Video-Datei
-        isRecording = true;
-        String externalStorageDirectory = Environment.getExternalStorageDirectory().getAbsolutePath();
-        String dcimDirectory = externalStorageDirectory + "/DCIM";
-        videoPath = dcimDirectory + "/video.mp4";
-        audioPath = dcimDirectory + "/audio.mp3";
-    }
-
-    private void stopVideoRecording(){
-        if (videoRecorder != null) {
-            videoRecorder.stop();
-            videoRecorder.release();
-            videoRecorder = null;
-        }
-    }
-
-    private void stopAudioRecording(){
-        if (audioRecorder != null) {
-            audioRecorder.stop();
-            audioRecorder.release();
-            audioRecorder = null;
-        }
-    }
-
-    private void waitTillThreadsStopped(){
-        try {
-            videoThread.join();
-            audioThread.join();
-        } catch (InterruptedException e) {
-            e.printStackTrace();
-        }
-    }
-
-    private void mergeVideoWithAudio() {
-        try {
-            setVideoExtractorDataSource(); //extrahieren der Video Datei, die zuvor zwischengespeichert wurde
-            setAudioExtractorDataSource(); //extrahieren der Audio Datei, die zuvor zwischengespeichert wurde
-
-            //Speicherort der später zusammengeführten Datei
-            String outputFilePath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES).getAbsolutePath() + "/merged_video.mp4";
-            //MediaMuxer zum Zusammenführen einer Audio- und einer Videodatei
-            MediaMuxer muxer = new MediaMuxer(outputFilePath, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);
-            int videoTrack = muxer.addTrack(videoFormat);
-            int audioTrack = muxer.addTrack(audioFormat);
-            muxer.start();
-
-            ByteBuffer buffer = ByteBuffer.allocate(1024 * 1024);
-            MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo();
-
-            videoExtraction(buffer, videoTrack, bufferInfo, muxer);
-            audioExtraction(buffer, audioTrack, bufferInfo, muxer);
-
-            muxer.stop();
-            muxer.release();
-
-            // Löschen der separaten Video- und Audio-Dateien
-            deleteVideoFile();
-            deleteAudioFile();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-    }
-
-    private void setVideoExtractorDataSource() {
-        try {
-            videoExtractor.setDataSource(videoPath);
-            int videoTrackIndex = getTrackIndex(videoExtractor, "video/");
-            if (videoTrackIndex < 0) {
-                // Video-Track nicht gefunden
-                return;
-            }
-            videoExtractor.selectTrack(videoTrackIndex);
-            videoFormat = videoExtractor.getTrackFormat(videoTrackIndex);
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    private void setAudioExtractorDataSource() {
-        try {
-            audioExtractor.setDataSource(audioPath);
-            int audioTrackIndex = getTrackIndex(audioExtractor, "audio/");
-            if (audioTrackIndex < 0) {
-                // Audio-Track nicht gefunden
-                return;
-            }
-            audioExtractor.selectTrack(audioTrackIndex);
-            audioFormat = audioExtractor.getTrackFormat(audioTrackIndex);
-
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    private int getTrackIndex(MediaExtractor extractor, String mimeType) {
-        int trackCount = extractor.getTrackCount();
-        for (int i = 0; i < trackCount; i++) {
-            MediaFormat format = extractor.getTrackFormat(i);
-            String trackMimeType = format.getString(MediaFormat.KEY_MIME);
-            if (trackMimeType.startsWith(mimeType)) {
-                return i;
-            }
-        }
-        return -1;
-    }
-
-    private void videoExtraction(ByteBuffer buffer, int videoTrack, MediaCodec.BufferInfo bufferInfo, MediaMuxer muxer) {
-        videoExtractor.seekTo(0, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
-        while (true) {
-            int sampleSize = videoExtractor.readSampleData(buffer, 0);
-            if (sampleSize < 0) {
-                break;
-            }
-            long presentationTimeUs = videoExtractor.getSampleTime();
-            bufferInfo.offset = 0;
-            bufferInfo.size = sampleSize;
-            bufferInfo.flags = MediaCodec.BUFFER_FLAG_KEY_FRAME;
-            bufferInfo.presentationTimeUs = presentationTimeUs;
-            muxer.writeSampleData(videoTrack, buffer, bufferInfo);
-            videoExtractor.advance();
-        }
-    }
-
-    private void audioExtraction(ByteBuffer buffer, int audioTrack, MediaCodec.BufferInfo bufferInfo, MediaMuxer muxer) {
-        audioExtractor.seekTo(0, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
-        while (true) {
-            int sampleSize = audioExtractor.readSampleData(buffer, 0);
-            if (sampleSize < 0) {
-                break;
-            }
-            long presentationTimeUs = audioExtractor.getSampleTime();
-            bufferInfo.offset = 0;
-            bufferInfo.size = sampleSize;
-            bufferInfo.flags = 0; // or MediaCodec.BUFFER_FLAG_KEY_FRAME
-            bufferInfo.presentationTimeUs = presentationTimeUs;
-            muxer.writeSampleData(audioTrack, buffer, bufferInfo);
-            audioExtractor.advance();
-        }
-    }
-
-
-    private void deleteVideoFile(){
-        File videoFile = new File(videoPath);
-        if (videoFile.exists()) {
-            videoFile.delete();
-        }
-    }
-
-    private void deleteAudioFile(){
-        File audioFile = new File(audioPath);
-        if (audioFile.exists()) {
-            audioFile.delete();
-        }
-    }
-}

app/src/main/java/com/example/greenwatch/alarmrecorder/runnables/AudioRecorder.java

@@ -1,33 +0,0 @@
-package com.example.greenwatch.alarmrecorder.runnables;
-
-import android.media.MediaRecorder;
-import android.widget.Toast;
-
-import com.example.greenwatch.MainActivity;
-
-import java.io.IOException;
-
-public class AudioRecorder implements Runnable {
-
-    private final MediaRecorder audioRecorder;
-    private final String audioPath;
-    public AudioRecorder(MediaRecorder audioRecorder, String audioPath) {
-        this.audioRecorder = audioRecorder;
-        this.audioPath = audioPath;
-    }
-    @Override
-    public void run() {
-        audioRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
-        audioRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
-        audioRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
-        audioRecorder.setOutputFile(audioPath);
-
-        try {
-            audioRecorder.prepare();
-            audioRecorder.start();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-    }
-
-}

app/src/main/java/com/example/greenwatch/alarmrecorder/runnables/VideoRecorder.java

@@ -1,38 +0,0 @@
-package com.example.greenwatch.alarmrecorder.runnables;
-
-import android.media.MediaRecorder;
-import android.view.SurfaceHolder;
-
-import com.example.greenwatch.viewmodels.ViewModelInterface;
-
-import java.io.IOException;
-
-public class VideoRecorder implements Runnable{
-    private final MediaRecorder videoRecorder;
-    private final String videoPath;
-    private SurfaceHolder previewHolder;
-
-    public VideoRecorder(MediaRecorder videoRecorder, String videoPath, SurfaceHolder previewHolder) {
-        this.videoRecorder = videoRecorder;
-        this.videoPath = videoPath;
-        this.previewHolder = previewHolder;
-    }
-    @Override
-    public void run() {
-        videoRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
-        videoRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
-        videoRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
-        videoRecorder.setOutputFile(videoPath);
-        videoRecorder.setOrientationHint(90);
-        //todo find solution for videoView
-        videoRecorder.setPreviewDisplay(previewHolder.getSurface());
-
-        try {
-            videoRecorder.prepare();
-            videoRecorder.start();
-
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-    }
-}

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

@@ -1,13 +1,9 @@
 package com.example.greenwatch.viewmodels;
 
-import android.content.Context;
-import android.view.SurfaceHolder;
-
 import androidx.lifecycle.LiveData;
 import androidx.lifecycle.MutableLiveData;
 import androidx.lifecycle.ViewModel;
 
-import com.example.greenwatch.alarmrecorder.AlarmRecorder;
 import com.example.greenwatch.models.Device;
 import com.example.greenwatch.repositories.DeviceRepository;
 import com.example.greenwatch.sensors.AccelerometerSensor;
@@ -15,26 +11,21 @@ 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;
     private MutableLiveData<Boolean> mStartAlarmRecording;
     private AccelerometerSensor mAccelerometerSensor;
-    private AlarmRecorder mAlarmRecorder;
     private DeviceRepository mDeviceRepository;
 
     @Override
-    public void init(SurfaceHolder previewHolder) {
+    public void init() {
         if (mDeviceRepository == null) {
             mDeviceRepository = DeviceRepository.getInstance();
         }
         if (mAccelerometerSensor == null) {
             mAccelerometerSensor = AccelerometerSensor.getInstance();
         }
-        if (mAlarmRecorder == null) {
-            mAlarmRecorder = AlarmRecorder.getInstance();
-        }
         if (mDeviceList == null) {
             mDeviceList = mDeviceRepository.getConnectedDeviceList();
         }
@@ -47,7 +38,6 @@ public class AccelerometerViewModel extends ViewModel implements ViewModelInterf
         if (mAccelerometerAlarmDetected == null) {
             mAccelerometerAlarmDetected = mAccelerometerSensor.getAccelerometerAlarmDetected();
         }
-        setAlarmRecordingPreviewHolder(previewHolder);
     }
 
     public void addValueToGesamtBE(float newValue) {
@@ -149,19 +139,4 @@ public class AccelerometerViewModel extends ViewModel implements ViewModelInterf
     public String getSystemTimeStamp() {
         return mDeviceRepository.getSystemTimeStamp();
     }
-
-    @Override
-    public void startAlarmRecording() {
-        mAlarmRecorder.startRecording();
-    }
-
-    @Override
-    public void stopAlarmRecording(Context context) {
-        mAlarmRecorder.stopRecording(context);
-    }
-
-    @Override
-    public void setAlarmRecordingPreviewHolder(SurfaceHolder previewHolder) {
-        mAlarmRecorder.setPreviewHolder(previewHolder);
-    }
 }

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

@@ -4,7 +4,6 @@ import android.Manifest;
 import android.app.Activity;
 import android.content.Context;
 import android.content.pm.PackageManager;
-import android.view.SurfaceHolder;
 
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
@@ -12,7 +11,6 @@ import androidx.lifecycle.LiveData;
 import androidx.lifecycle.MutableLiveData;
 import androidx.lifecycle.ViewModel;
 
-import com.example.greenwatch.alarmrecorder.AlarmRecorder;
 import com.example.greenwatch.communication.WiFiCommunication;
 import com.example.greenwatch.models.Device;
 import com.example.greenwatch.repositories.DeviceRepository;
@@ -25,29 +23,32 @@ public class MainActivityViewModel extends ViewModel implements ViewModelInterfa
     private MutableLiveData<List<Device>> mAlarmHistoryList;
     private MutableLiveData<Boolean> mStartAlarmRecording;
     private DeviceRepository mDeviceRepository;
-    private AlarmRecorder mAlarmRecorder;
     private static final int RIGHTS_REQUEST_CAMERA = 10;
-    private static final int REQUEST_PERMISSION = 200;
+    private static final int RIGHTS_REQUEST_CAMERA_MICROFON = 1;
 
     @Override
-    public void init(SurfaceHolder previewHolder) {
+    public void init() {
         WiFiCommunication mWiFiCommunication;
         if(mDeviceList != null) {
             return;
         }
-        if (mAlarmRecorder == null) {
-            mAlarmRecorder = AlarmRecorder.getInstance();
-        }
         //todo: check if WiFi instanz can be hold only by the repository
         mDeviceRepository = DeviceRepository.getInstance();
         mWiFiCommunication = WiFiCommunication.getInstance();
         mDeviceRepository.setWiFiCommunication(mWiFiCommunication);
         mWiFiCommunication.setDeviceRepository(mDeviceRepository);
-        //mDeviceRepository.createNewDevice(mDeviceRepository.getSystemTimeStamp(), mDeviceRepository.getLocalDeviceUUID(), false, "No Sensor selected", 0);
+        mDeviceRepository.createNewDevice(mDeviceRepository.getSystemTimeStamp(), mDeviceRepository.getLocalDeviceUUID(), false, "No Sensor selected", 0);
         mDeviceList = mDeviceRepository.getConnectedDeviceList();
         mAlarmHistoryList = mDeviceRepository.getAlarmHistoryDeviceList();
         mStartAlarmRecording = mDeviceRepository.getStartAlarmRecording();
-        setAlarmRecordingPreviewHolder(previewHolder);
+    }
+
+    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) {
@@ -58,22 +59,6 @@ public class MainActivityViewModel extends ViewModel implements ViewModelInterfa
         ActivityCompat.requestPermissions(activity, new String[]{android.Manifest.permission.CAMERA}, RIGHTS_REQUEST_CAMERA);
     }
 
-    public boolean isAudioRecordingAccessAllowed(Context context) {
-        return ContextCompat.checkSelfPermission(context, Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED;
-    }
-
-    public void accessRequestAudioRecording(Activity activity) {
-        ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.RECORD_AUDIO}, REQUEST_PERMISSION);
-    }
-
-    public boolean isWriteExternalStorageAccessAllowed(Context context) {
-        return ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;
-    }
-
-    public void accessRequestWriteExternalStorage(Activity activity) {
-        ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_PERMISSION);
-    }
-
     @Override
     public LiveData<List<Device>> getConnectedDeviceList() {
         return mDeviceList;
@@ -153,19 +138,4 @@ public class MainActivityViewModel extends ViewModel implements ViewModelInterfa
     public String getSystemTimeStamp() {
         return null;
     }
-
-    @Override
-    public void startAlarmRecording() {
-        mAlarmRecorder.startRecording();
-    }
-
-    @Override
-    public void stopAlarmRecording(Context context) {
-        mAlarmRecorder.stopRecording(context);
-    }
-
-    @Override
-    public void setAlarmRecordingPreviewHolder(SurfaceHolder previewHolder) {
-        mAlarmRecorder.setPreviewHolder(previewHolder);
-    }
 }

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/java/com/example/greenwatch/viewmodels/VideodetectionAndAccelerometerViewModel.java

@@ -16,7 +16,7 @@ import com.example.greenwatch.sensors.CameraSensor;
 
 import java.util.List;
 
-/*public class VideodetectionAndAccelerometerViewModel extends ViewModel implements ViewModelInterface{
+public class VideodetectionAndAccelerometerViewModel extends ViewModel implements ViewModelInterface{
     private MutableLiveData<List<Device>> mDeviceList;
     private MutableLiveData<Boolean> mAccelerometerAlarmDetected;
     private MutableLiveData<Boolean> mVideoAlarmDetected;
@@ -193,4 +193,4 @@ import java.util.List;
     public String getSystemTimeStamp() {
         return mDeviceRepository.getSystemTimeStamp();
     }
-}*/
+}

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

@@ -1,7 +1,6 @@
 package com.example.greenwatch.viewmodels;
 
 import android.content.Context;
-import android.view.SurfaceHolder;
 
 import androidx.camera.lifecycle.ProcessCameraProvider;
 import androidx.lifecycle.LifecycleOwner;
@@ -9,7 +8,6 @@ import androidx.lifecycle.LiveData;
 import androidx.lifecycle.MutableLiveData;
 import androidx.lifecycle.ViewModel;
 
-import com.example.greenwatch.alarmrecorder.AlarmRecorder;
 import com.example.greenwatch.models.Device;
 import com.example.greenwatch.repositories.DeviceRepository;
 import com.example.greenwatch.sensors.CameraSensor;
@@ -23,7 +21,6 @@ public class VideodetectionViewModel extends ViewModel implements ViewModelInter
     private MutableLiveData<List<Device>> mAlarmHistoryList;
     private MutableLiveData<Boolean> mStartAlarmRecording;
     private DeviceRepository mDeviceRepository;
-    private AlarmRecorder mAlarmRecorder;
     private CameraSensor mCameraSensor;
 
 
@@ -32,16 +29,13 @@ public class VideodetectionViewModel extends ViewModel implements ViewModelInter
     }
 
     @Override
-    public void init(SurfaceHolder previewHolder) {
+    public void init() {
         if (mDeviceRepository == null) {
             mDeviceRepository = DeviceRepository.getInstance();
         }
         if (mCameraSensor == null) {
             mCameraSensor = CameraSensor.getInstance();
         }
-        if (mAlarmRecorder == null) {
-            mAlarmRecorder = AlarmRecorder.getInstance();
-        }
         if (mDeviceList == null) {
             mDeviceList = mDeviceRepository.getConnectedDeviceList();
         }
@@ -54,7 +48,6 @@ public class VideodetectionViewModel extends ViewModel implements ViewModelInter
         if (mVideoAlarmDetected == null) {
             mVideoAlarmDetected = mCameraSensor.getVideoAlarmDetectedValue();
         }
-        setAlarmRecordingPreviewHolder(previewHolder);
     }
 
     public void bindImageAnalysis(ProcessCameraProvider cameraProvider, LifecycleOwner lifecycleOwner, Context context) {
@@ -144,19 +137,4 @@ public class VideodetectionViewModel extends ViewModel implements ViewModelInter
     public String getSystemTimeStamp() {
         return mDeviceRepository.getSystemTimeStamp();
     }
-
-    @Override
-    public void startAlarmRecording() {
-        mAlarmRecorder.startRecording();
-    }
-
-    @Override
-    public void stopAlarmRecording(Context context) {
-        mAlarmRecorder.stopRecording(context);
-    }
-
-    @Override
-    public void setAlarmRecordingPreviewHolder(SurfaceHolder previewHolder) {
-        mAlarmRecorder.setPreviewHolder(previewHolder);
-    }
 }

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

@@ -1,8 +1,5 @@
 package com.example.greenwatch.viewmodels;
 
-import android.content.Context;
-import android.view.SurfaceHolder;
-
 import androidx.lifecycle.LiveData;
 
 import com.example.greenwatch.models.Device;
@@ -10,7 +7,7 @@ import com.example.greenwatch.models.Device;
 import java.util.List;
 
 public interface ViewModelInterface {
-    void init(SurfaceHolder previewHolder);
+    void init();
     LiveData<List<Device>> getConnectedDeviceList();
     LiveData<List<Device>> getAlarmHistoryList();
     LiveData<Boolean> getStartAlarmRecording();
@@ -27,7 +24,4 @@ public interface ViewModelInterface {
     int getSensorMassage(String deviceID);
     String getLocalDeviceUUID();
     String getSystemTimeStamp();
-    void startAlarmRecording();
-    void stopAlarmRecording(Context context);
-    void setAlarmRecordingPreviewHolder(SurfaceHolder previewHolder);
 }

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

@@ -8,13 +8,6 @@
     android:padding="10dp"
     tools:context=".AccelerometerActivity">
 
-    <SurfaceView
-        android:id="@+id/surfaceViewAccelerometer"
-        android:layout_width="1dp"
-        android:layout_height="1dp"
-        android:visibility="visible">
-    </SurfaceView>
-
     <TextView
         android:id="@+id/tvAccelerometerStatusmessage"
         android:layout_width="match_parent"

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

@@ -12,7 +12,7 @@
         android:id="@+id/alarmHistoryListRecyclerView"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:layout_weight="4"
+        android:layout_weight="3"
         tools:listitem="@layout/alarm_history_item">
     </androidx.recyclerview.widget.RecyclerView>
 
@@ -20,15 +20,9 @@
         android:id="@+id/deviceListRecyclerView"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:layout_weight="4"
+        android:layout_weight="3"
         tools:listitem="@layout/device_item">
     </androidx.recyclerview.widget.RecyclerView>
-
-    <SurfaceView
-        android:id="@+id/surfaceViewMainActivity"
-        android:layout_width="1dp"
-        android:layout_height="1dp">
-    </SurfaceView>
     
     <LinearLayout
         android:layout_width="match_parent"

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

@@ -8,13 +8,6 @@
     android:padding="10dp"
     tools:context=".VideodetectionActivity">
 
-    <SurfaceView
-        android:id="@+id/surfaceViewVideodetection"
-        android:layout_width="1dp"
-        android:layout_height="1dp"
-        android:visibility="visible">
-    </SurfaceView>
-
     <TextView
         android:id="@+id/tvVideodetectionStatusmessage"
         android:layout_width="match_parent"