Add Microfon Sensor to Project

app/src/main/AndroidManifest.xml

 
     <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"/>
 

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

 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;
 
-public class AudiodetectionActivity 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.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/MainActivity.java

         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) {
         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() {

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

+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

+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

+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

+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

 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/MainActivityViewModel.java

 package com.example.greenwatch.viewmodels;
 
+import android.Manifest;
 import android.app.Activity;
 import android.content.Context;
 import android.content.pm.PackageManager;
     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() {
         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

+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

         android:id="@+id/tvAudiodetectionStatusmessage"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="Audiodetection Activity">
+        android:text="">
     </TextView>
 
     <Button
         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>