Changde Detector class

app/src/main/java/com/example/ueberwachungssystem/Detection/DetectionReport.java

     public String detectionType;
     public float detectedValue;
     public boolean detectionState;
-    //public String detectorID;
 
     public DetectionReport(boolean detectionState, String detectionType, float detectedAmplitude) {
         this.timeStamp = String.valueOf(Calendar.getInstance().getTime());
 
     /** Get Detection Report in String format */
     public String toString() {
+        String state = "State: " + "[" + this.detectionState + "]";
         String time = "Time: " + "[" + this.timeStamp + "]";
         String type = "Type: " + "[" + this.detectionType + "]";
         String value = "Value: " + "[" + this.detectedValue + "]";
-        //String id = "ID: " + "[" + this.detectorID + "]";
 
-        return String.join("\t", time, type, value);
+        return String.join("\t", state, time, type, value);
     }
 
     /** Debug Report */

app/src/main/java/com/example/ueberwachungssystem/Detection/Detector.java

 package com.example.ueberwachungssystem.Detection;
 
+import android.os.CountDownTimer;
+
 import androidx.annotation.NonNull;
 
 
 abstract public class Detector {
     private OnDetectionListener listener;
+    private boolean isDetecting = false;
+    private boolean extendDetection = false;
+
+    // Countdown parameters
+    private int COUNTDOWN_TIME = 1000;          // milliseconds
+    private int COUNTDOWN_POLLING_TIME = 100;   // milliseconds
 
     /** Constructor - takes context of current activity */
     public Detector() {}
         this.listener = listener;
     }
 
-
     /** Triggers onDetectionListener - call this to trigger violation/alarm */
     public void reportViolation(String detectionType, float amplitude) {
         if (listener != null) {
-            DetectionReport detectionReport = new DetectionReport(true, detectionType, amplitude);
-            listener.onDetection(detectionReport);
+            if (!isDetecting) {
+                isDetecting = true;
+                DetectionReport detectionReport = new DetectionReport(true, detectionType, amplitude);
+                listener.onDetection(detectionReport);
+                startDetectionTimer(detectionType, amplitude);
+            } else {
+                extendDetection = true;
+            }
         } else {
+            isDetecting = false;
+            extendDetection = false;
             throw new IllegalStateException("No listener set for violation reporting");
         }
     }
 
+    private void startDetectionTimer(String detectionType, float amplitude) {
+        isDetecting = true;
+        new CountDownTimer((long) COUNTDOWN_TIME, COUNTDOWN_POLLING_TIME) {
+            @Override
+            public void onTick(long millisUntilFinished) {
+                if (extendDetection) {
+                    extendDetection = false;
+                    startDetectionTimer(detectionType, amplitude);
+                    this.cancel();
+                }
+            }
+            @Override
+            public void onFinish() {
+                isDetecting = false;
+                DetectionReport detectionReport = new DetectionReport(false, detectionType, amplitude);
+                listener.onDetection(detectionReport);
+            }
+        }.start();
+    }
+
     /** Starts Detection (abstract method: needs to be overridden in child class) */
     public abstract void startDetection();
 

app/src/main/java/com/example/ueberwachungssystem/Detection/VideoDetector.java

     private static final int DILATE_KERNEL_SIZE = 5;
     private static final float CONTOUR_THRESHOLD = 100;
     private static final float ALARM_THRESHOLD = 0.2f;   // Percent of pixels changed
-    private static final long START_DELAY = 1;   // milliseconds
+    private static final long START_DELAY = 1000;   // milliseconds
     private static final android.util.Size IMAGE_RES = new android.util.Size(640, 480);
 
 
                 //mat = alternativeProcessImage(mat);
                 mat = processImage(mat);
                 debugMat(mat, imageView1);
+
+                if (frameCnt <= 5) {
+                   reportViolation("Video", 0);
+                   frameCnt++;
+                }
             }
             imageProxy.close();
         });
+
+
         // Create Preview
         Preview preview = new Preview.Builder().build();
         // Specify which Camera to use
         CameraSelector cameraSelector = new CameraSelector.Builder().requireLensFacing(CameraSelector.LENS_FACING_BACK).build();
         // Delay till start
-        new CountDownTimer((long)(START_DELAY * 1000), 1000){
+        new CountDownTimer((long)(START_DELAY), 1000){
             @Override
             public void onTick(long millisUntilFinished) {}
             @Override

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

         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
+        getCameraAccess();
+
         ImageView imageView = findViewById(R.id.imageView);
         ImageView ogiv = findViewById(R.id.ogiv);