Added fundamentals of the Model View Controler Structure of the device handling

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

+package com.example.greenwatch.mvc;
+
+
+public class Device {
+
+    private String sensor;
+    private Boolean isActive;
+
+    public Device(String Sensor, Boolean Status) {
+        this.sensor = Sensor;
+        this.isActive = Status;
+    }
+
+    public void setSensor(String Sensor) {
+        this.sensor = Sensor;
+    }
+
+    public String getSensor() {
+        return sensor;
+    }
+
+    public void setIsActive(Boolean Status) {
+        this.isActive = Status;
+    }
+
+    public Boolean getIsActive() {
+        return isActive;
+    }
+}

app/src/main/java/com/example/greenwatch/mvc/DeviceController.java

+package com.example.greenwatch.mvc;
+
+public class DeviceController {
+
+    private DeviceModel deviceModel;
+    private DeviceView deviceView;
+
+    public DeviceController(DeviceView view) {
+        this.deviceModel = DeviceModel.getInstance();
+        this.deviceView = view;
+    }
+
+    public void createDevice(String Sensor, Boolean Status) {
+        Device device = new Device(Sensor, Status);
+        deviceModel.addDevice(device);
+        // todo: Inform view and sender about changes
+    }
+    public void setDeviceSensor(String UUID, String Sensor) {
+       deviceModel.setDeviceSensor(UUID, Sensor);
+    }
+
+    public String  getDeviceSensor(String UUID) {
+        return deviceModel.getDeviceSensor(UUID);
+    }
+
+    public void setDeviceStatus(String UUID, Boolean Status) {
+        deviceModel.setDeviceStatus(UUID, Status);
+    }
+
+    public Boolean getDeviceStatus(String UUID) {
+        return deviceModel.getDeviceStatus(UUID);
+    }
+}

app/src/main/java/com/example/greenwatch/mvc/DeviceModel.java

+package com.example.greenwatch.mvc;
+
+import java.util.Vector;
+
+public class DeviceModel {
+    private static DeviceModel itemModelInstance;
+    // todo: should be a hashmap with UUID Keys
+    private Vector<Device> connectetDevicesList;
+
+    private DeviceModel() {
+        connectetDevicesList = new Vector<Device>();
+    }
+
+    public static synchronized DeviceModel getInstance() {
+        if (itemModelInstance == null){
+            itemModelInstance = new DeviceModel();
+        }
+        return itemModelInstance;
+    }
+
+    public void addDevice(Device device) {
+        // todo: Check if divece already exist
+        connectetDevicesList.add(device);
+    }
+
+    public Vector<Device> getConnectetDevicesList() {
+        return connectetDevicesList;
+    }
+
+    public void setDeviceSensor(String UUID, String Sensor) {
+        // todo: iterate through HashMap and find Divece for UUID
+    }
+
+    public String  getDeviceSensor(String UUID) {
+        // todo: iterate through HashMap and find Divece for UUID
+        return "hasToBeDone";
+    }
+
+    public void setDeviceStatus(String UUID, Boolean Status) {
+        // todo: iterate through HashMap and find Divece for UUID
+    }
+
+    public Boolean getDeviceStatus(String UUID) {
+        // todo: iterate through HashMap and find Divece for UUID
+        return false;
+    }
+}

app/src/main/java/com/example/greenwatch/mvc/DeviceView.java

+package com.example.greenwatch.mvc;
+
+import java.util.Vector;
+
+public class DeviceView {
+
+    public void updateView(Vector<Device> deviceVector) {
+        // todo: what should be displayed
+    }
+}