Runnable test implementation

app/src/main/AndroidManifest.xml

@@ -16,6 +16,21 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.GreenWatch">
+        <activity
+            android:name=".VideodetectionAndAccelerometerActivity"
+            android:exported="false" />
+        <activity
+            android:name=".AudiodetectionAndAccelerometerActivity"
+            android:exported="false" />
+        <activity
+            android:name=".VideodetectionActivity"
+            android:exported="false" />
+        <activity
+            android:name=".AudiodetectionActivity"
+            android:exported="false" />
+        <activity
+            android:name=".AccelerometerActivity"
+            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true">

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

@@ -0,0 +1,147 @@
+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;
+
+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 java.util.List;
+
+public class AccelerometerActivity extends AppCompatActivity implements SensorEventListener {
+
+    private SensorManager accelerometerManager;
+    private Sensor accelerometerSensor;
+    private TextView accelerometerStatusMessage;
+    private TextView accelerometerDataTV;
+    private TextView accelerometerWarningTV;
+    private Button backToMainActivityButton;
+    private AccelerometerViewModel mAccelerometerViewModel;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_accelerometer);
+
+        accelerometerStatusMessage = (TextView) findViewById(R.id.tvAccelerometerStatusmessage);
+        accelerometerDataTV = (TextView) findViewById(R.id.tvAccelerometerData);
+        accelerometerWarningTV = (TextView) findViewById(R.id.tvAccelerometerWarning);
+        backToMainActivityButton = (Button) findViewById(R.id.accelerometerBackToMainActivity);
+
+        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();
+            }
+        });
+
+        mAccelerometerViewModel = new ViewModelProvider(this).get(AccelerometerViewModel.class);
+        mAccelerometerViewModel.init();
+        mAccelerometerViewModel.getConnectedDeviceList().observe(this, new Observer<List<Device>>() {
+            @Override
+            public void onChanged(List<Device> devices) {
+                deviceListAdapter.setDevices(devices);
+                Toast.makeText(AccelerometerActivity.this, "onChanged", Toast.LENGTH_LONG).show();
+            }
+        });
+
+        mAccelerometerViewModel.getAlarmHistoryList().observe(this, new Observer<List<Device>>() {
+            @Override
+            public void onChanged(List<Device> devices) {
+                alarmHistoryListAdapter.setAlarmHistoryList(devices);
+            }
+        });
+
+        mAccelerometerViewModel.getMovementDetectedValue().observe(this, new Observer<Boolean>() {
+            @Override
+            public void onChanged(Boolean aBoolean) {
+                if (aBoolean) {
+                    mAccelerometerViewModel.updateDevice(mAccelerometerViewModel.getLocalDeviceUUID(), mAccelerometerViewModel.getSystemTimeStamp(), true, "Accelerometer", 10);
+                }
+                else {
+                    mAccelerometerViewModel.updateDevice(mAccelerometerViewModel.getLocalDeviceUUID(), mAccelerometerViewModel.getSystemTimeStamp(), false, "Accelerometer", 0);
+                }
+
+            }
+        });
+
+        accelerometerManager = (SensorManager) getSystemService(SENSOR_SERVICE);
+        if (accelerometerManager.getSensorList(Sensor.TYPE_GYROSCOPE).size() == 0) {
+            accelerometerSensor = null;
+            Toast.makeText(AccelerometerActivity.this, "No accelerometer sensor available", Toast.LENGTH_LONG).show();
+        }
+        else {
+            accelerometerSensor = accelerometerManager.getSensorList(Sensor.TYPE_GYROSCOPE).get(0);
+        }
+    }
+
+    @Override
+    public void onSensorChanged(SensorEvent event) {
+        StringBuilder sb = new StringBuilder();
+        sb.append("x=")
+                .append(event.values[0])
+                .append("\ny=")
+                .append(event.values[1])
+                .append("\nz=")
+                .append(event.values[2]);
+        accelerometerDataTV.setText(sb.toString());
+        mAccelerometerViewModel.addValueToGesamtBE(event.values[0] + event.values[1] + event.values[2]);
+        mAccelerometerViewModel.meanValueCalculation();
+        mAccelerometerViewModel.calibrateAccelerometerSensor();
+        mAccelerometerViewModel.checkAlarmCondition();
+
+    }
+
+    @Override
+    public void onAccuracyChanged(Sensor sensor, int accuracy) {
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        if (accelerometerSensor != null) {
+            if (accelerometerManager.registerListener(this, accelerometerSensor, SensorManager.SENSOR_DELAY_GAME)) {
+                Toast.makeText(AccelerometerActivity.this, "We registered to the sensor", Toast.LENGTH_LONG).show();
+            } else {
+                Toast.makeText(AccelerometerActivity.this, "Registration did not work", Toast.LENGTH_LONG).show();
+            }
+        }
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        if (accelerometerSensor != null) {
+            accelerometerManager.unregisterListener(this, accelerometerSensor);
+        }
+    }
+}

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

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

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

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

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

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

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

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

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

@@ -1,101 +1,147 @@
 package com.example.greenwatch;
 
-import android.Manifest;
-import android.content.pm.PackageManager;
-import android.graphics.SurfaceTexture;
+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.content.Intent;
 import android.os.Bundle;
-import android.view.TextureView;
 import android.view.View;
 import android.widget.Button;
 import android.widget.Toast;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.core.app.ActivityCompat;
-import androidx.core.content.ContextCompat;
+import com.example.greenwatch.adapters.AlarmHistoryListAdapter;
+import com.example.greenwatch.adapters.DeviceListAdapter;
+import com.example.greenwatch.models.Device;
+import com.example.greenwatch.viewmodels.MainActivityViewModel;
 
-public class MainActivity extends AppCompatActivity implements TextureView.SurfaceTextureListener{
+import java.util.List;
 
-    private boolean isRecording = false;
-    private static final int REQUEST_PERMISSION = 200;
-    private Button button;
-    private TextureView textureView;
-    private AlarmRecorder alarmRecorder;
+public class MainActivity extends AppCompatActivity {
+
+    private Button audiodetectionButton;
+    private Button videodetectionButton;
+    private Button accelerometerButton;
+    private Button audiodetectionAndAccelerometerButton;
+    private Button videodetectionAndAccelerometerButton;
+    private Button connectionButton;
+    private MainActivityViewModel mMainActivityViewModel;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        button = findViewById(R.id.button);
-        textureView = findViewById(R.id.textureView);
-        textureView.setSurfaceTextureListener(this);
+        audiodetectionButton = (Button) findViewById(R.id.audiodetectionButton);
+        videodetectionButton = (Button) findViewById(R.id.videodetectionButton);
+        accelerometerButton = (Button) findViewById(R.id.accelerometerButton);
+        audiodetectionAndAccelerometerButton = (Button) findViewById(R.id.audiodetectionAndAccelerometerButton);
+        videodetectionAndAccelerometerButton = (Button) findViewById(R.id.videodetectionAndAccelerometerButton);
+        connectionButton = (Button) findViewById(R.id.connectionButton);
 
-        button.setOnClickListener(new View.OnClickListener() {
+        RecyclerView deviceListRecyclerView = findViewById(R.id.deviceListRecyclerView);
+        deviceListRecyclerView.setLayoutManager(new LinearLayoutManager(this));
+        deviceListRecyclerView.setHasFixedSize(true);
+
+        final DeviceListAdapter deviceListAdapter = new DeviceListAdapter();
+        deviceListRecyclerView.setAdapter(deviceListAdapter);
+
+        RecyclerView alarmHistoryListRecyclerView = findViewById(R.id.alarmHistoryListRecyclerView);
+        alarmHistoryListRecyclerView.setLayoutManager(new LinearLayoutManager(this));
+        alarmHistoryListRecyclerView.setHasFixedSize(true);
+
+        final AlarmHistoryListAdapter alarmHistoryListAdapter  = new AlarmHistoryListAdapter();
+        alarmHistoryListRecyclerView.setAdapter(alarmHistoryListAdapter);
+
+        mMainActivityViewModel = new ViewModelProvider(this).get(MainActivityViewModel.class);
+        mMainActivityViewModel.init();
+        mMainActivityViewModel.getConnectedDeviceList().observe(this, new Observer<List<Device>>() {
+            @Override
+            public void onChanged(List<Device> devices) {
+                deviceListAdapter.setDevices(devices);
+                Toast.makeText(MainActivity.this, "onChanged", Toast.LENGTH_LONG).show();
+            }
+        });
+
+        mMainActivityViewModel.getAlarmHistoryList().observe(this, new Observer<List<Device>>() {
+            @Override
+            public void onChanged(List<Device> devices) {
+                alarmHistoryListAdapter.setAlarmHistoryList(devices);
+            }
+        });
+
+        audiodetectionButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                if (!isRecording) {
-                    if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA)
-                            != PackageManager.PERMISSION_GRANTED
-                            || ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
-                            != PackageManager.PERMISSION_GRANTED
-                            || ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.RECORD_AUDIO)
-                            != PackageManager.PERMISSION_GRANTED) {
-                        ActivityCompat.requestPermissions(MainActivity.this,
-                                new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.RECORD_AUDIO},
-                                REQUEST_PERMISSION);
-                    } else {
-                        isRecording = true;
-                        alarmRecorder.startRecording();
-                    }
-                } else {
-                    isRecording = false;
-                    alarmRecorder.stopRecording();
-                }
+                //openAudiodetectionActivity();
+                mMainActivityViewModel.updateDevice(mMainActivityViewModel.getLocalDeviceUUID(), "10:51",  false, "Audio", 10);
+            }
+        });
+        videodetectionButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                //openVideodetectionActivity();
+                mMainActivityViewModel.setSensorType(mMainActivityViewModel.getLocalDeviceUUID(), "Video");
+                mMainActivityViewModel.setTimeStamp(mMainActivityViewModel.getLocalDeviceUUID(), "12:50");
+                mMainActivityViewModel.setDeviceID(mMainActivityViewModel.getLocalDeviceUUID(), "12345");
+            }
+        });
+        accelerometerButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                openAccelerometerActivity();
+                mMainActivityViewModel.setSensorType(mMainActivityViewModel.getLocalDeviceUUID(), "Accelerometer");
+            }
+        });
+        audiodetectionAndAccelerometerButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                //openAudiodetectionAndAccelerometerActivity();
+                mMainActivityViewModel.setSensorType(mMainActivityViewModel.getLocalDeviceUUID(), "AudiodetectionAndAccelerometer");
+                mMainActivityViewModel.setTimeStamp(mMainActivityViewModel.getLocalDeviceUUID(), "00:00");
+                mMainActivityViewModel.setDeviceID(mMainActivityViewModel.getLocalDeviceUUID(), "6789");
+            }
+        });
+        videodetectionAndAccelerometerButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                openVideodetectionAndAccelerometerActivity();
+            }
+        });
+        connectionButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                openConnectionActivity();
             }
         });
     }
-
-    @Override
-    public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
-        alarmRecorder = new AlarmRecorder(surfaceTexture);
+    public void openAudiodetectionActivity(){
+        Intent intent = new Intent(this, AudiodetectionActivity.class);
+        startActivity(intent);
+    }
+    public void openVideodetectionActivity(){
+        Intent intent =  new Intent(this, VideodetectionActivity.class);
+        startActivity(intent);
+    }
+    public void openAccelerometerActivity(){
+        Intent intent = new Intent(this, AccelerometerActivity.class);
+        startActivity(intent);
+    }
+    public void openAudiodetectionAndAccelerometerActivity(){
+        Intent intent = new Intent(this, AudiodetectionAndAccelerometerActivity.class);
+        startActivity(intent);
+    }
+    public void openVideodetectionAndAccelerometerActivity(){
+        //Intent intent = new Intent(this, VideodetectionAndAccelerometerActivity.class);
+        //startActivity(intent);
+        mMainActivityViewModel.updateDevice(mMainActivityViewModel.getLocalDeviceUUID(), "24:00",  false, "Video", 0);
+    }
+    public void openConnectionActivity(){
+        //Intent intent = new Intent(this, ConnectionActivity.class);
+        //startActivity(intent);
+        mMainActivityViewModel.updateDevice(mMainActivityViewModel.getLocalDeviceUUID(), "10:51",  true, "Audio", 10);
     }
 
-    @Override
-    public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
-        // Die Größe der SurfaceTexture hat sich geändert
-        // Hier können entsprechende Anpassungen vorgenommen werden
-    }
-
-    @Override
-    public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
-        // SurfaceTexture wurde zerstört
-        // Hier können entsprechende Bereinigungen durchgeführt werden
-        return true;
-    }
-
-    @Override
-    public void onSurfaceTextureUpdated(SurfaceTexture surface) {
-        // SurfaceTexture wurde aktualisiert
-        // Hier können entsprechende Aktionen ausgeführt werden, wenn gewünscht
-    }
-
-    private SurfaceTexture getSurfaceTexture() {
-        return textureView.getSurfaceTexture();
-    }
-
-    @Override
-    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
-        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
-        if (requestCode == REQUEST_PERMISSION) {
-            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
-                // Berechtigungen wurden gewährt
-                Toast.makeText(this, "Berechtigungen gewährt", Toast.LENGTH_SHORT).show();
-                isRecording = true;
-                alarmRecorder.startRecording();
-            } else {
-                // Berechtigungen wurden nicht gewährt
-                Toast.makeText(this, "Berechtigungen nicht gewährt", Toast.LENGTH_SHORT).show();
-            }
-        }
-    }
 }

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

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

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

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

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

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

app/src/main/java/com/example/greenwatch/adapters/AlarmHistoryListAdapter.java

@@ -0,0 +1,62 @@
+package com.example.greenwatch.adapters;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.example.greenwatch.R;
+import com.example.greenwatch.models.Device;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class AlarmHistoryListAdapter extends RecyclerView.Adapter<AlarmHistoryListAdapter.AlarmHistoryListHolder> {
+    private List<Device> alarmHistoryList = new ArrayList<>();
+
+
+    @NonNull
+    @Override
+    public AlarmHistoryListHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        View itemView = LayoutInflater.from(parent.getContext())
+                .inflate(R.layout.alarm_history_item, parent, false);
+        return new AlarmHistoryListHolder(itemView);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull AlarmHistoryListHolder holder, int position) {
+        Device currentDevice = alarmHistoryList.get(position);
+        holder.textViewSensorType.setText(holder.itemView.getContext().getString(R.string.sensor_type_placeholder, currentDevice.getSensorType()));
+        holder.textViewDeviceID.setText(holder.itemView.getContext().getString(R.string.deviceID_placeholder, currentDevice.getDeviceID()));
+        holder.textViewTimeStamp.setText(holder.itemView.getContext().getString(R.string.sensor_time_stamp_placeholder, currentDevice.getTimeStamp()));
+        holder.textViewSensorMessage.setText(holder.itemView.getContext().getString(R.string.sensor_message_placeholder, currentDevice.getSensorMassage()));
+    }
+
+    @Override
+    public int getItemCount() {
+        return alarmHistoryList.size();
+    }
+
+    public void setAlarmHistoryList(List<Device> alarmHistoryList) {
+        this.alarmHistoryList = alarmHistoryList;
+        notifyDataSetChanged();
+    }
+
+    class AlarmHistoryListHolder extends RecyclerView.ViewHolder {
+        private TextView textViewSensorType;
+        private TextView textViewDeviceID;
+        private TextView textViewTimeStamp;
+        private TextView textViewSensorMessage;
+
+        public AlarmHistoryListHolder(View itemView) {
+            super(itemView);
+            textViewSensorType = (TextView) itemView.findViewById(R.id.tvAlarmHistoryDeviceSensorType);
+            textViewDeviceID = (TextView) itemView.findViewById(R.id.tvAlarmHistoryDeviceID);
+            textViewTimeStamp = (TextView) itemView.findViewById(R.id.tvAlarmHistoryDeviceTimeStamp);
+            textViewSensorMessage = (TextView) itemView.findViewById(R.id.tvAlarmHistoryDeviceSensorMassage);
+        }
+    }
+}

app/src/main/java/com/example/greenwatch/adapters/DeviceListAdapter.java

@@ -0,0 +1,92 @@
+package com.example.greenwatch.adapters;
+
+import android.graphics.Color;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.example.greenwatch.R;
+import com.example.greenwatch.models.Device;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+public class DeviceListAdapter extends RecyclerView.Adapter<DeviceListAdapter.DeviceListHolder> {
+    private List<Device> devices = new ArrayList<>();
+
+
+    @NonNull
+    @Override
+    public DeviceListHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        View itemView = LayoutInflater.from(parent.getContext())
+                .inflate(R.layout.device_item, parent, false);
+        return new DeviceListHolder(itemView);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull DeviceListHolder holder, int position) {
+        Device currentDevice = devices.get(position);
+        holder.textViewSensorType.setText(holder.itemView.getContext().getString(R.string.sensor_type_placeholder, currentDevice.getSensorType()));
+        holder.textViewDeviceID.setText(holder.itemView.getContext().getString(R.string.deviceID_placeholder, currentDevice.getDeviceID()));
+        holder.textViewTimeStamp.setText(holder.itemView.getContext().getString(R.string.sensor_time_stamp_placeholder, currentDevice.getTimeStamp()));
+        holder.textViewSensorMessage.setText(holder.itemView.getContext().getString(R.string.sensor_message_placeholder, currentDevice.getSensorMassage()));
+        holder.setDeviceSensorStatus(currentDevice);
+    }
+
+    @Override
+    public int getItemCount() {
+        return devices.size();
+    }
+
+    public void setDevices(List<Device> devices) {
+        this.devices = devices;
+        Collections.sort(this.devices, new Comparator<Device>() {
+
+            @Override
+            public int compare(Device device1, Device device2) {
+                if (device1.getSensorStatus() && !device2.getSensorStatus()) {
+                    return -1;
+                } else if (!device1.getSensorStatus() && device2.getSensorStatus()) {
+                    return 1;
+                } else {
+                    return 0;
+                }
+            }
+        });
+        notifyDataSetChanged();
+    }
+
+    class DeviceListHolder extends RecyclerView.ViewHolder {
+        private TextView textViewSensorType;
+        private TextView textViewSensorStatus;
+        private TextView textViewDeviceID;
+        private TextView textViewTimeStamp;
+        private TextView textViewSensorMessage;
+
+        public DeviceListHolder(View itemView) {
+            super(itemView);
+            textViewSensorType = (TextView) itemView.findViewById(R.id.tvDeviceSensorType);
+            textViewSensorStatus = (TextView) itemView.findViewById(R.id.tvDeviceSensorStatus);
+            textViewDeviceID = (TextView) itemView.findViewById(R.id.tvDeviceID);
+            textViewTimeStamp = (TextView) itemView.findViewById(R.id.tvDeviceTimeStamp);
+            textViewSensorMessage = (TextView) itemView.findViewById(R.id.tvDeviceSensorMassage);
+        }
+
+        public void setDeviceSensorStatus(Device device) {
+            if (device.getSensorStatus()) {
+                textViewSensorStatus.setText(itemView.getContext().getString(R.string.sensor_status_placeholder, "AN"));
+                itemView.setBackgroundColor(Color.RED);
+            }
+            else {
+                textViewSensorStatus.setText(itemView.getContext().getString(R.string.sensor_status_placeholder, "AUS"));
+                itemView.setBackgroundColor(Color.WHITE);
+            }
+        }
+    }
+}

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

@@ -1,20 +1,24 @@
-package com.example.greenwatch;
+package com.example.greenwatch.alarmrecorder;
 
-import android.graphics.SurfaceTexture;
 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.Surface;
-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 java.io.File;
 import java.io.IOException;
 import java.nio.ByteBuffer;
 
 public class AlarmRecorder {
+
+    private boolean isRecording;
     private String videoPath;
     private String audioPath;
     private MediaFormat videoFormat;
@@ -25,24 +29,22 @@ public class AlarmRecorder {
     private Runnable videoRecorderRunnable;
     private MediaRecorder videoRecorder;
     private MediaRecorder audioRecorder;
-    //private SurfaceHolder previewHolder;
-    private Surface surface;
     private Thread videoThread; // Video-Thread als Instanzvariable
     private Thread audioThread; // Audio-Thread als Instanzvariable
 
-    public AlarmRecorder(SurfaceTexture surfaceTexture) {
+    public AlarmRecorder() {
         audioRecorder = new MediaRecorder();
         videoRecorder = new MediaRecorder();
         videoExtractor = new MediaExtractor();
         audioExtractor = new MediaExtractor();
-        this.surface = new Surface(surfaceTexture);
     }
 
-    public void startRecording() {
+
+    private void startRecording() {
         createStoragePaths(); //Speicherort und -namen für Audio- und Video-Datei
 
         audioRecorderRunnable = new AudioRecorder(audioRecorder, audioPath);
-        videoRecorderRunnable = new VideoRecorder(videoRecorder, videoPath, surface);
+        videoRecorderRunnable = new VideoRecorder(videoRecorder, videoPath);
         audioThread = new Thread(audioRecorderRunnable);
         videoThread = new Thread(videoRecorderRunnable);
 
@@ -51,11 +53,19 @@ public class AlarmRecorder {
         audioThread.start();
     }
 
-    public void stopRecording() {
+    private void stopRecording() {
+        isRecording = false;
         try {
             stopVideoRecording();
             stopAudioRecording();
 
+            runOnUiThread(new Runnable() {
+                @Override
+                public void run() {
+                    Toast.makeText(MainActivity.this, "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
@@ -63,6 +73,8 @@ public class AlarmRecorder {
             if (videoFile.exists() && audioFile.exists()) {
                 //Wenn Video- und Audioaufzeichnung gestoppt und abgespeichert sind, beginne mit dem Mergeprozess der beiden
                 mergeVideoWithAudio();
+            } else {
+                Toast.makeText(MainActivity.this, "Dateien wurden nicht gefunden!", Toast.LENGTH_SHORT).show();
             }
         } catch (RuntimeException stopException) {
             stopException.printStackTrace();
@@ -71,6 +83,7 @@ public class AlarmRecorder {
 
     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";
@@ -124,6 +137,13 @@ public class AlarmRecorder {
             muxer.stop();
             muxer.release();
 
+            runOnUiThread(new Runnable() {
+                @Override
+                public void run() {
+                    Toast.makeText(MainActivity.this, "Video und Audio erfolgreich zusammengeführt", Toast.LENGTH_SHORT).show();
+                }
+            });
+
             // Löschen der separaten Video- und Audio-Dateien
             deleteVideoFile();
             deleteAudioFile();
@@ -209,6 +229,7 @@ public class AlarmRecorder {
         }
     }
 
+
     private void deleteVideoFile(){
         File videoFile = new File(videoPath);
         if (videoFile.exists()) {

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

@@ -1,6 +1,9 @@
-package com.example.greenwatch;
+package com.example.greenwatch.alarmrecorder.runnables;
 
 import android.media.MediaRecorder;
+import android.widget.Toast;
+
+import com.example.greenwatch.MainActivity;
 
 import java.io.IOException;
 

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

@@ -1,22 +1,18 @@
-package com.example.greenwatch;
+package com.example.greenwatch.alarmrecorder.runnables;
 
 import android.media.MediaRecorder;
-import android.view.Surface;
-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;
-    private Surface surface;
 
-
-    public VideoRecorder(MediaRecorder videoRecorder, String videoPath, Surface surface) {
+    public VideoRecorder(MediaRecorder videoRecorder, String videoPath) {
         this.videoRecorder = videoRecorder;
         this.videoPath = videoPath;
-        this.surface = surface;
     }
     @Override
     public void run() {
@@ -25,7 +21,8 @@ public class VideoRecorder implements Runnable{
         videoRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
         videoRecorder.setOutputFile(videoPath);
         videoRecorder.setOrientationHint(90);
-        videoRecorder.setPreviewDisplay(surface);
+        //todo find solution for videoView
+        videoRecorder.setPreviewDisplay(videoView.getHolder().getSurface());
 
         try {
             videoRecorder.prepare();
@@ -36,4 +33,3 @@ public class VideoRecorder implements Runnable{
         }
     }
 }
-

app/src/main/java/com/example/greenwatch/communication/WiFiCommunication.java

@@ -0,0 +1,133 @@
+package com.example.greenwatch.communication;
+
+import com.example.greenwatch.repositories.DeviceRepository;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.Inet4Address;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.net.UnknownHostException;
+import java.util.Enumeration;
+
+public class WiFiCommunication {
+
+    private final InetAddress address;
+    private final DatagramSocket socket;
+    private final int port;
+    private String rxString;
+    private String sendMessage;
+    //private String sendMsg = "default";
+    private boolean isNewMessage;
+    volatile private boolean running;
+    private static WiFiCommunication wifiCommunicationInstance;
+    private DeviceRepository mDeviceRepository;
+
+    private WiFiCommunication() {
+        port = 1234;
+        try {
+            socket = new DatagramSocket(port);
+            socket.setBroadcast(true);
+            address = InetAddress.getByName("255.255.255.255");
+            running = true;
+            isNewMessage = false;
+            new ReceiveThread().start();
+            new SendThread().start();
+        } catch (SocketException | UnknownHostException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static synchronized WiFiCommunication getInstance() {
+        if (wifiCommunicationInstance == null){
+            wifiCommunicationInstance = new WiFiCommunication();
+        }
+        return wifiCommunicationInstance;
+    }
+
+    public void setDeviceRepository(DeviceRepository deviceRepository) {
+        this.mDeviceRepository = deviceRepository;
+    }
+
+    public void setNewMessage(String newMessage, boolean isNewMessage){
+        this.sendMessage = newMessage;
+        this.isNewMessage = isNewMessage;
+    }
+
+    public static String getLocalIpAddress() {
+        try {
+            for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
+                NetworkInterface networkInterface = (NetworkInterface) ((Enumeration<?>) en).nextElement();
+                for (Enumeration<InetAddress> addresses = networkInterface.getInetAddresses(); addresses.hasMoreElements();) {
+                    InetAddress inetAddress = addresses.nextElement();
+                    if (!inetAddress.isLoopbackAddress() && inetAddress instanceof Inet4Address) {
+                        return inetAddress.getHostAddress();
+                    }
+                }
+            }
+        } catch (SocketException ex) {
+            ex.printStackTrace();
+        }
+        return null;
+    }
+
+    public void stopCommunication() {
+        running = false;
+        socket.close();
+    }
+
+    private class SendThread extends Thread {
+        private int tmpCnt = 0;
+        @Override
+        public void run() {
+            try {
+                do {
+
+                    if(isNewMessage)
+                    {
+                        isNewMessage = false;
+                        //todo: adapt send String
+                        String txString = getLocalIpAddress() + " sends. #" + tmpCnt++ + sendMessage;
+                        byte[] txBuffer = txString.getBytes();
+
+                        DatagramPacket txPacket = new DatagramPacket(txBuffer, txBuffer.length, address, port);
+
+                        for(int i = 0; i < 20; i++) {
+                            socket.send(txPacket);
+                        }
+                    }
+                } while (running);
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private class ReceiveThread extends Thread {
+        private String rxString = "";
+        private String previousRxString = "";
+        @Override
+        public void run() {
+            try {
+                do {
+                    byte[] rxBuffer = new byte[1024];
+                    DatagramPacket packet = new DatagramPacket(rxBuffer, rxBuffer.length);
+                    socket.receive(packet);
+                    rxString = new String(packet.getData(), 0, packet.getLength());
+
+                    if(!previousRxString.equals(rxString)){
+                        mDeviceRepository.getNewReceivedMessage(rxString);
+
+                    }
+                    previousRxString = rxString;
+
+                } while (running);
+            }
+            catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}

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

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

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

@@ -0,0 +1,286 @@
+package com.example.greenwatch.repositories;
+
+
+import androidx.lifecycle.MutableLiveData;
+
+import com.example.greenwatch.models.Device;
+import com.example.greenwatch.communication.WiFiCommunication;
+
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.UUID;
+
+public class DeviceRepository {
+
+    private final int maxAlarmHistoryListSize = 20;
+    private final String delimiter = ", ";
+    private final String SensorStatusKey = "An";
+    private String localDeviceUUID;
+    private static DeviceRepository deviceRepositoryInstance;
+    private WiFiCommunication mWiFiCommunication;
+    private MutableLiveData<List<Device>> deviceList = new MutableLiveData<>();
+    private MutableLiveData<List<Device>> alarmHistoryList = new MutableLiveData<>();
+    private HashMap<String, Device> connectedDevicesList = new HashMap<>();
+    private HashMap<String, String> deviceIDMapper = new HashMap<>();
+    private List<Device> alarmHistoryDeviceList = new ArrayList<>();
+
+    private DeviceRepository() {
+        setLocalDeviceUUID();
+    }
+
+    public static synchronized DeviceRepository getInstance() {
+        if (deviceRepositoryInstance == null){
+            deviceRepositoryInstance = new DeviceRepository();
+        }
+        return deviceRepositoryInstance;
+    }
+
+    public void setWiFiCommunication(WiFiCommunication wiFiCommunication) {
+        this.mWiFiCommunication = wiFiCommunication;
+    }
+
+    public MutableLiveData<List<Device>> getConnectedDeviceList() {
+        setMutableLiveDataDeviceList();
+        return deviceList;
+    }
+
+    public MutableLiveData<List<Device>> getAlarmHistoryDeviceList() {
+        setMutableLiveDataAlarmHistoryList();
+        return alarmHistoryList;
+    }
+
+    public void createNewDevice(String timeStamp, String deviceID, boolean sensorStatus, String sensorType, int sensorMassage){
+        Device newDevice = new Device(timeStamp, deviceID, sensorStatus, sensorType, sensorMassage);
+        if (sensorStatus) {
+            setAlarmHistoryDeviceList(newDevice);
+        }
+        addToConnectedDeviceList(newDevice.getDeviceID(), newDevice);
+        setMutableLiveDataDeviceList();
+    }
+
+    public void getNewReceivedMessage(String newMessage) {
+        String[] messageString = messageStringSplitter(newMessage);
+        String timeStamp = messageString[0];
+        String deviceID = messageString[1];
+        boolean sensorStatus = convertSensorStatus(messageString[2]);
+        String sensorType = messageString[3];
+        int sensorMassage = Integer.valueOf(messageString[4]);
+
+        if (deviceID.equals(checkDeviceID(localDeviceUUID))) {
+            return;
+        }
+
+        if(!connectedDevicesList.containsKey(deviceID)) {
+            createNewDevice(timeStamp, deviceID, sensorStatus, sensorType, sensorMassage);
+        }
+        else {
+            updateDevice(deviceID, timeStamp, sensorStatus, sensorType, sensorMassage);
+        }
+    }
+
+    private String messageStringBuilder(String deviceID) {
+        StringBuilder message = new StringBuilder();
+        Device device = connectedDevicesList.get(deviceID);
+        if(device != null) {
+            message.append(device.getTimeStamp())
+                    .append(delimiter)
+                    .append(device.getDeviceID())
+                    .append(delimiter)
+                    .append(device.getSensorStatus())
+                    .append(delimiter)
+                    .append(device.getSensorType())
+                    .append(delimiter)
+                    .append(device.getSensorMassage());
+        }
+        else {
+            message.append("")
+                    .append(delimiter)
+                    .append("")
+                    .append(delimiter)
+                    .append("")
+                    .append(delimiter)
+                    .append("")
+                    .append(delimiter)
+                    .append("");
+        }
+        return message.toString();
+    }
+
+    public String getLocalDeviceUUID() {
+        return localDeviceUUID;
+    }
+
+    public void updateDevice(String deviceID, String timeStamp, boolean sensorStatus, String sensorType, int sensorMassage) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            device.setTimeStamp(timeStamp);
+            device.setSensorType(sensorType);
+            device.setSensorMassage(sensorMassage);
+            if (!device.getSensorStatus() && sensorStatus) {
+                setAlarmHistoryDeviceList(device);
+            }
+            device.setSensorStatus(sensorStatus);
+            addToConnectedDeviceList(checkedDeviceID, device);
+            setMutableLiveDataDeviceList();
+        }
+    }
+
+    public void setTimeStamp(String deviceID, String timeStamp) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            device.setTimeStamp(timeStamp);
+            addToConnectedDeviceList(checkedDeviceID, device);
+            setMutableLiveDataDeviceList();
+        }
+    }
+
+    public String getTimeStamp(String deviceID) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            return device.getTimeStamp();
+        }
+        return "";
+    }
+
+    public void setDeviceID(String deviceID, String newDeviceID) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            device.setDeviceID(newDeviceID);
+            setDeviceIDMapper(newDeviceID);
+            connectedDevicesList.remove(checkedDeviceID);
+            addToConnectedDeviceList(newDeviceID, device);
+            setMutableLiveDataDeviceList();
+        }
+    }
+
+    public String getDeviceID(String deviceID) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            return device.getDeviceID();
+        }
+        return "";
+    }
+
+    public void setSensorStatus(String deviceID, boolean sensorStatus) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            if (!device.getSensorStatus() && sensorStatus) {
+                setAlarmHistoryDeviceList(device);
+            }
+            device.setSensorStatus(sensorStatus);
+            addToConnectedDeviceList(checkedDeviceID, device);
+            setMutableLiveDataDeviceList();
+
+        }
+    }
+
+    public boolean getSensorStatus(String deviceID) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            return device.getSensorStatus();
+        }
+        return false;
+    }
+
+    public void setSensorType(String deviceID, String sensorType) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            device.setSensorType(sensorType);
+            addToConnectedDeviceList(checkedDeviceID, device);
+            setMutableLiveDataDeviceList();
+        }
+    }
+
+    public String getSensorType(String deviceID) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            return device.getSensorType();
+        }
+        return "";
+    }
+
+    public void setSensorMassage(String deviceID, int sensorMessage) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            device.setSensorMassage(sensorMessage);
+            addToConnectedDeviceList(checkedDeviceID, device);
+            setMutableLiveDataDeviceList();
+        }
+    }
+
+    public int getSensorMassage(String deviceID) {
+        String checkedDeviceID = checkDeviceID(deviceID);
+        Device device = connectedDevicesList.get(checkedDeviceID);
+        if(device != null) {
+            return device.getSensorMassage();
+        }
+        return 0;
+    }
+
+    public String getSystemTimeStamp() {
+        SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");
+        Date date = new Date(System.currentTimeMillis());
+        return formatter.format(date);
+    }
+
+    private void setMutableLiveDataDeviceList() {
+        List<Device> list = new ArrayList<>(connectedDevicesList.values());
+        deviceList.setValue(list);
+    }
+
+    private void setMutableLiveDataAlarmHistoryList() {
+        alarmHistoryList.setValue(alarmHistoryDeviceList);
+    }
+
+    private void addToConnectedDeviceList(String key, Device device) {
+        connectedDevicesList.put(key, device);
+        if (key.equals(checkDeviceID(localDeviceUUID))) {
+            mWiFiCommunication.setNewMessage(messageStringBuilder(device.getDeviceID()),true);
+        }
+    }
+
+    private String checkDeviceID(String deviceID) {
+        if(!deviceIDMapper.isEmpty() && deviceID.equals(localDeviceUUID)) {
+            return deviceIDMapper.get(deviceID);
+        }
+        return deviceID;
+    }
+
+    private void setDeviceIDMapper(String deviceID) {
+        deviceIDMapper.put(localDeviceUUID, deviceID);
+    }
+
+    private void setLocalDeviceUUID(){
+        this.localDeviceUUID = UUID.randomUUID().toString();
+    }
+
+    private String[] messageStringSplitter(String message) {
+        return message.split(delimiter);
+    }
+
+    private boolean convertSensorStatus(String status) {
+        return status.equals(SensorStatusKey);
+    }
+
+    private void setAlarmHistoryDeviceList(Device device) {
+        if (alarmHistoryDeviceList.size() == maxAlarmHistoryListSize) {
+            alarmHistoryDeviceList.remove(alarmHistoryDeviceList.size() -1);
+        }
+        Device alarmHistoryDevice = new Device(device.getTimeStamp(), device.getDeviceID(), device.getSensorStatus(), device.getSensorType(), device.getSensorMassage());
+        alarmHistoryDeviceList.add(0, alarmHistoryDevice);
+        setMutableLiveDataAlarmHistoryList();
+    }
+}

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

@@ -0,0 +1,162 @@
+package com.example.greenwatch.viewmodels;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+import com.example.greenwatch.models.Device;
+import com.example.greenwatch.repositories.DeviceRepository;
+
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+public class AccelerometerViewModel extends ViewModel implements ViewModelInterface {
+
+    private MutableLiveData<List<Device>> mDeviceList;
+    private MutableLiveData<Boolean> mMovementDetected = new MutableLiveData<>();
+    private MutableLiveData<List<Device>> mAlarmHistoryList;
+    private DeviceRepository mDeviceRepository;
+    private ArrayList<Float> Gesamt_be;
+    int arraySize = 500;
+    int functionCallCount;
+    float meanValue;
+    float offsetValue;
+    float thresholdValue;
+    boolean startMeasuring;
+
+    @Override
+    public void init() {
+        if (mDeviceList == null) {
+            mDeviceRepository = DeviceRepository.getInstance();
+            mDeviceList = mDeviceRepository.getConnectedDeviceList();
+            mAlarmHistoryList = mDeviceRepository.getAlarmHistoryDeviceList();
+        }
+        initGesamtBE();
+        mMovementDetected.setValue(false);
+        functionCallCount = 0;
+        meanValue = 0f;
+        offsetValue = 0.1f;
+        thresholdValue = 0.15f;
+        startMeasuring = false;
+    }
+
+    public void initGesamtBE() {
+        Gesamt_be = new ArrayList<>(arraySize);
+        for (int i = 0; i < arraySize; i++) {
+            Gesamt_be.add(0f);
+        }
+    }
+
+    public void addValueToGesamtBE(float newValue) {
+        if (Gesamt_be.size() == arraySize) {
+            Gesamt_be.remove(Gesamt_be.size() -1);
+        }
+        Gesamt_be.add(0, newValue);
+        functionCallCount++;
+    }
+
+    public void meanValueCalculation() {
+        for (float element : Gesamt_be) {
+            meanValue += Math.abs(element);
+        }
+        meanValue = meanValue/arraySize;
+    }
+
+    public void calibrateAccelerometerSensor() {
+        if (functionCallCount <= arraySize) {
+            offsetValue = meanValue;
+        }
+        else {
+            startMeasuring = true;
+        }
+    }
+
+    public void checkAlarmCondition() {
+        if (meanValue > (thresholdValue + offsetValue) && startMeasuring && !mMovementDetected.getValue()) {
+            mMovementDetected.setValue(true);
+        }
+        else if (meanValue < (thresholdValue + offsetValue) && mMovementDetected.getValue()){
+            mMovementDetected.setValue(false);
+        }
+    }
+
+    public String getSystemTimeStamp() {
+        return mDeviceRepository.getSystemTimeStamp();
+    }
+
+    public LiveData<Boolean> getMovementDetectedValue() {
+        return mMovementDetected;
+    }
+
+    @Override
+    public LiveData<List<Device>> getConnectedDeviceList() {
+        return mDeviceList;
+    }
+
+    @Override
+    public LiveData<List<Device>> getAlarmHistoryList() {
+        return mAlarmHistoryList;
+    }
+
+    @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();
+    }
+}

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

@@ -0,0 +1,105 @@
+package com.example.greenwatch.viewmodels;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+import com.example.greenwatch.communication.WiFiCommunication;
+import com.example.greenwatch.models.Device;
+import com.example.greenwatch.repositories.DeviceRepository;
+
+import java.util.List;
+
+public class MainActivityViewModel extends ViewModel implements ViewModelInterface {
+
+    private MutableLiveData<List<Device>> mDeviceList;
+    private MutableLiveData<List<Device>> mAlarmHistoryList;
+    private DeviceRepository mDeviceRepository;
+
+    @Override
+    public void init() {
+        WiFiCommunication mWiFiCommunication;
+        if(mDeviceList != null) {
+            return;
+        }
+        //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("00:00", "1234", true, "Test", 21);
+        mDeviceList = mDeviceRepository.getConnectedDeviceList();
+        mAlarmHistoryList = mDeviceRepository.getAlarmHistoryDeviceList();
+    }
+
+    @Override
+    public LiveData<List<Device>> getConnectedDeviceList() {
+        return mDeviceList;
+    }
+
+    @Override
+    public LiveData<List<Device>> getAlarmHistoryList() {
+        return mAlarmHistoryList;
+    }
+
+    @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();
+    }
+}

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

@@ -0,0 +1,25 @@
+package com.example.greenwatch.viewmodels;
+
+import androidx.lifecycle.LiveData;
+
+import com.example.greenwatch.models.Device;
+
+import java.util.List;
+
+public interface ViewModelInterface {
+    void init();
+    LiveData<List<Device>> getConnectedDeviceList();
+    LiveData<List<Device>> getAlarmHistoryList();
+    void updateDevice(String deviceID, String timeStamp, boolean sensorStatus, String sensorType, int sensorMassage);
+    void setTimeStamp(String deviceID, String timeStamp);
+    String getTimeStamp(String deviceID);
+    void setDeviceID(String deviceID, String newDeviceID);
+    String getDeviceID(String deviceID);
+    void setSensorStatus(String deviceID, boolean sensorStatus);
+    boolean getSensorStatus(String deviceID);
+    void setSensorType(String deviceID, String sensorType);
+    String getSensorType(String deviceID);
+    void setSensorMassage(String deviceID, int sensorMessage);
+    int getSensorMassage(String deviceID);
+    String getLocalDeviceUUID();
+}

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

@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="10dp"
+    tools:context=".AccelerometerActivity">
+
+    <TextView
+        android:id="@+id/tvAccelerometerStatusmessage"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="">
+    </TextView>
+
+    <TextView
+        android:id="@+id/tvAccelerometerData"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="">
+    </TextView>
+
+    <TextView
+        android:id="@+id/tvAccelerometerWarning"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="">
+    </TextView>
+
+    <Button
+        android:id="@+id/accelerometerBackToMainActivity"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Back to MainActivity">
+    </Button>
+
+    <LinearLayout
+        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.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="10dp"
+    tools:context=".AudiodetectionActivity">
+
+    <TextView
+        android:id="@+id/tvAudiodetectionStatusmessage"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Audiodetection Activity">
+    </TextView>
+
+    <Button
+        android:id="@+id/audiodetectorBackToMainActivity"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Back to MainActivity">
+    </Button>
+
+</LinearLayout>

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

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="10dp"
+    tools:context=".AudiodetectionAndAccelerometerActivity">
+
+    <TextView
+        android:id="@+id/tvAudiodetectionAndAccelerometerStatusmessage"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Audiodetection + Accelerometer Activity">
+    </TextView>
+
+    <Button
+        android:id="@+id/audiodetectionAndAccelerometerBackToMainActivity"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Back to MainActivity">
+    </Button>
+
+</LinearLayout>

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

@@ -1,31 +1,83 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="10dp"
     tools:context=".MainActivity">
 
-    <TextureView
-        android:id="@+id/textureView"
-        android:layout_width="1sp"
-        android:layout_height="1sp"
-        android:visibility="visible"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="1.0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/button"
-        app:layout_constraintVertical_bias="0.0" />
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/alarmHistoryListRecyclerView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="3"
+        tools:listitem="@layout/alarm_history_item">
+    </androidx.recyclerview.widget.RecyclerView>
 
-    <Button
-        android:id="@+id/button"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginEnd="339dp"
-        android:text="Record Video"
-        app:layout_constraintHorizontal_bias="0.5"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"/>
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/deviceListRecyclerView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="3"
+        tools:listitem="@layout/device_item">
+    </androidx.recyclerview.widget.RecyclerView>
     
-</androidx.constraintlayout.widget.ConstraintLayout>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:layout_weight="3">
+
+        <Button
+            android:id="@+id/audiodetectionButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="Audiodetection">
+        </Button>
+
+        <Button
+            android:id="@+id/videodetectionButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="Videodetection">
+        </Button>
+
+        <Button
+            android:id="@+id/accelerometerButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="Accelerometer">
+        </Button>
+
+        <Button
+            android:id="@+id/audiodetectionAndAccelerometerButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="Audiodetection + Accelerometer">
+        </Button>
+
+        <Button
+            android:id="@+id/videodetectionAndAccelerometerButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="Videodetection + Accelerometer">
+        </Button>
+
+        <Button
+            android:id="@+id/connectionButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="Connect to Devices">
+        </Button>
+
+    </LinearLayout>
+
+</LinearLayout>

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

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="10dp"
+    tools:context=".VideodetectionActivity">
+
+    <TextView
+        android:id="@+id/tvVideodetectionStatusmessage"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Videodetection Activity">
+    </TextView>
+
+    <Button
+        android:id="@+id/videodetectorBackToMainActivity"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Back to MainActivity">
+    </Button>
+
+</LinearLayout>

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

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="10dp"
+    tools:context=".VideodetectionAndAccelerometerActivity">
+
+    <TextView
+        android:id="@+id/tvVideodetectionAndAccelerometerStatusmessage"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Videodetection + Accelerometer Activity">
+    </TextView>
+
+    <Button
+        android:id="@+id/videodetectionAndAccelerometerBackToMainActivity"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Back to MainActivity">
+    </Button>
+
+</LinearLayout>

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

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginEnd="8dp"
+    android:layout_marginStart="8dp"
+    android:layout_marginTop="8dp">
+
+    <RelativeLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:padding="8dp">
+
+        <TextView
+            android:id="@+id/tvAlarmHistoryDeviceSensorType"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/sensor_type_placeholder"
+            android:textAppearance="@style/TextAppearance.AppCompat.Large"
+            android:maxLines="1"
+            android:layout_alignParentStart="true"
+            android:ellipsize="end">
+        </TextView>
+
+        <TextView
+            android:id="@+id/tvAlarmHistoryDeviceID"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/tvAlarmHistoryDeviceSensorType"
+            android:text="@string/deviceID_placeholder">
+        </TextView>
+
+        <TextView
+            android:id="@+id/tvAlarmHistoryDeviceTimeStamp"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/tvAlarmHistoryDeviceID"
+            android:text="@string/sensor_time_stamp_placeholder">
+        </TextView>
+
+        <TextView
+            android:id="@+id/tvAlarmHistoryDeviceSensorMassage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/tvAlarmHistoryDeviceTimeStamp"
+            android:text="@string/sensor_message_placeholder">
+        </TextView>
+
+    </RelativeLayout>
+
+</androidx.cardview.widget.CardView>

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

@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginEnd="8dp"
+    android:layout_marginStart="8dp"
+    android:layout_marginTop="8dp">
+    
+    <RelativeLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:padding="8dp">
+        
+        <TextView
+            android:id="@+id/tvDeviceSensorStatus"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentEnd="true"
+            android:text="@string/sensor_status_placeholder"
+            android:textAppearance="@style/TextAppearance.AppCompat.Large">
+        </TextView>
+
+        <TextView
+            android:id="@+id/tvDeviceSensorType"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/sensor_type_placeholder"
+            android:textAppearance="@style/TextAppearance.AppCompat.Large"
+            android:maxLines="1"
+            android:layout_toStartOf="@id/tvDeviceSensorStatus"
+            android:layout_alignParentStart="true"
+            android:ellipsize="end">
+        </TextView>
+
+        <TextView
+            android:id="@+id/tvDeviceID"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/tvDeviceSensorType"
+            android:text="@string/deviceID_placeholder">
+        </TextView>
+
+        <TextView
+            android:id="@+id/tvDeviceTimeStamp"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/tvDeviceID"
+            android:text="@string/sensor_time_stamp_placeholder">
+        </TextView>
+
+        <TextView
+            android:id="@+id/tvDeviceSensorMassage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/tvDeviceTimeStamp"
+            android:text="@string/sensor_message_placeholder">
+        </TextView>
+
+    </RelativeLayout>
+
+</androidx.cardview.widget.CardView>

app/src/main/res/values/strings.xml

@@ -1,3 +1,8 @@
 <resources>
     <string name="app_name">GreenWatch</string>
+    <string name="sensor_type_placeholder">Sensortyp: %s</string>
+    <string name="sensor_status_placeholder">Sensorstatus: %s</string>
+    <string name="deviceID_placeholder">Sensor-ID: %s</string>
+    <string name="sensor_time_stamp_placeholder">Timestamp: %s</string>
+    <string name="sensor_message_placeholder">Sensormessage: %d</string>
 </resources>