Refactor

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

@@ -14,7 +14,6 @@ import java.io.File;
 
 @ExperimentalGetImage
 public class DetectorService extends LifecycleService {
-
     public ServiceBinder serviceBinder = new ServiceBinder();
     private DetectorService.OnDetectionListener listener;
     private boolean isServiceRunning = false;
@@ -27,6 +26,9 @@ public class DetectorService extends LifecycleService {
     public int onStartCommand(Intent intent, int flags, int startId) {
         if (isServiceRunning)
             return START_NOT_STICKY;
+
+
+        // Setup Service classes:
         videoDetector = new VideoDetector(this);
         videoDetector.setOnDetectionListener(new Detector.OnDetectionListener() {
             @Override
@@ -38,8 +40,8 @@ public class DetectorService extends LifecycleService {
         audioRecorder = new AudioRecorder(this);
 
 
-        isServiceRunning = true;
 
+        isServiceRunning = true;
         return super.onStartCommand(intent, flags, startId);
     }
 

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

@@ -2,7 +2,6 @@ package com.example.ueberwachungssystem.Detection;
 
 import android.Manifest;
 import android.annotation.SuppressLint;
-import android.app.Activity;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.graphics.ImageFormat;
@@ -53,9 +52,6 @@ public class VideoDetector extends Detector {
     // Calling Activity
     private final Context context;
 
-    // Permission handling
-    private static final int PERMISSION_REQUEST_CODE = 3691;
-
     // Camera Provider
     private ProcessCameraProvider cameraProvider;
     private ImageAnalysis imageAnalysis;
@@ -79,9 +75,11 @@ public class VideoDetector extends Detector {
 
 
     // Parameters
-    private static final float ALARM_THRESHOLD = 0.5f;   // Percent of pixels changed
+    private static final float ALARM_THRESHOLD = 0f;   // Percent of pixels changed
+    private static final float AREA_THRESHOLD = 10f;
+    private static final int DILATE_ITERATIONS = 2;
     private static final float START_DELAY = 20000;   // milliseconds
-    private static final android.util.Size IMAGE_RES = new android.util.Size(480, 360);
+    private static final android.util.Size IMAGE_RES = new android.util.Size(640, 480);
 
 
 
@@ -110,11 +108,6 @@ public class VideoDetector extends Detector {
         // Check States
         if (isDetecting)
             return;
-        // Return On Request Permissions
-        if (!hasPermissions()) {
-            getPermissions();
-            return;
-        }
         // Configure Image Analysis
         imageAnalysis = setupImageAnalysis();
         // Open CV startup check
@@ -141,12 +134,6 @@ public class VideoDetector extends Detector {
     public void startRecording() {
         // Check States
         if (isRecording){
-            extendViolation();
-            return;
-        }
-        // Return On Request Permissions
-        if (!hasPermissions()) {
-            getPermissions();
             return;
         }
 
@@ -237,7 +224,7 @@ public class VideoDetector extends Detector {
                 // Violation Condition
                 if (percentChanged * 100 > ALARM_THRESHOLD) {
                     if (allowReportViolation)
-                        reportViolation("Video", n);
+                        reportViolation("Video", percentChanged);
                 }
             }
             imageProxy.close();
@@ -274,9 +261,11 @@ public class VideoDetector extends Detector {
         // Process Image
         Mat processed = preprocessed.clone();
         processed = OpenCVHelper.thresholdPixels(processed, previousImage, 25);
-        processed = OpenCVHelper.dilateBinaryMat(processed, new Size(3,3));
-        processed = OpenCVHelper.dilateBinaryMat(processed, new Size(3,3));
-        processed = OpenCVHelper.thresholdContourArea(processed, 500);
+
+        for(int i = 0; i < DILATE_ITERATIONS; i++)
+            processed = OpenCVHelper.dilateBinaryMat(processed, new Size(3,3));
+
+        processed = OpenCVHelper.thresholdContourArea(processed, AREA_THRESHOLD);
         // Output
         previousImage = preprocessed.clone();
         // Show Output Image
@@ -292,7 +281,6 @@ public class VideoDetector extends Detector {
         this.outputImageView = outputImageView;
     }
 
-
     /**
     private void setPreviewView(@NonNull PreviewView previewView) {
         // Create Preview
@@ -302,7 +290,6 @@ public class VideoDetector extends Detector {
      */
 
 
-
     /** Generate File Name */
     private String generateFileName(){
         // Get the current timestamp
@@ -321,7 +308,6 @@ public class VideoDetector extends Detector {
         return display.getRotation();
     }
 
-
     /** Start delay until Violation Report is allowed */
     private void startViolationTimer(float setupTime) {
         new CountDownTimer((long) (START_DELAY), 100) {
@@ -335,16 +321,6 @@ public class VideoDetector extends Detector {
         }.start();
     }
 
-    /** Permission handling */
-    private boolean hasPermissions() {
-        return ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED &&
-                ContextCompat.checkSelfPermission(context, Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED;
-    }
-    private void getPermissions() {
-        if (!hasPermissions())
-            ActivityCompat.requestPermissions((Activity) context, new String[]{android.Manifest.permission.CAMERA, Manifest.permission.RECORD_AUDIO}, PERMISSION_REQUEST_CODE);
-    }
-
     public void setOutputDir(File outputDir) {
         this.outputDir = outputDir;
     }

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

@@ -30,39 +30,50 @@ public class MainActivity extends AppCompatActivity {
         PreviewView previewView = findViewById(R.id.previewView);
 
 
-        VideoDetector vd = new VideoDetector(this);
-        //vd.setPreviewView(previewView);
-        vd.debugProcessing(inputImageView, outputImageView);
-        vd.setOnDetectionListener(new Detector.OnDetectionListener() {
-            @Override
-            public void onDetection(@NonNull DetectionReport detectionReport) {
-                Log.d("onDetection", detectionReport.toString());
-            }
-        });
-        vd.startDetection();
+        PermissionHandler permissionHandler = new PermissionHandler(this);
 
 
-        AudioRecorder audioRecorder = new AudioRecorder(this);
+        permissionHandler.getPermissions();
 
-
-
-        ToggleButton toggleButton = findViewById(R.id.toggleButton);
-        toggleButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                if (toggleButton.isChecked())
-                {
-                    //vd.startDetection();
-                    //vd.stopDetection();
-                    vd.startRecording();
-                    audioRecorder.startRecording();
+        if (permissionHandler.hasPermissions()) {
+            AudioRecorder audioRecorder = new AudioRecorder(this);
+            VideoDetector vd = new VideoDetector(this);
+            //vd.setPreviewView(previewView);
+            vd.debugProcessing(inputImageView, outputImageView);
+            vd.setOnDetectionListener(new Detector.OnDetectionListener() {
+                @Override
+                public void onDetection(@NonNull DetectionReport detectionReport) {
+                    Log.d("onDetection", detectionReport.toString());
                 }
-                else {
-                    //vd.stopDetection();
-                    vd.stopRecording();
-                    audioRecorder.stopRecording();
+            });
+            vd.startDetection();
+
+            ToggleButton toggleButton = findViewById(R.id.toggleButton);
+            toggleButton.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    if (toggleButton.isChecked())
+                    {
+                        //vd.startDetection();
+                        //vd.stopDetection();
+                        vd.startRecording();
+                        audioRecorder.startRecording();
+                    }
+                    else {
+                        //vd.stopDetection();
+                        vd.stopRecording();
+                        audioRecorder.stopRecording();
+                    }
                 }
-            }
-        });
+            });
+
+
+
+
+
+
+
+        }
+
     }
 }

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

@@ -0,0 +1,43 @@
+package com.example.ueberwachungssystem;
+
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.widget.Toast;
+
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+
+public class PermissionHandler {
+    private final Context context;
+    private static final int PERMISSION_REQUEST_CODE = 23409;
+    private static final String[] permissions = new String[]{
+            android.Manifest.permission.CAMERA,
+            android.Manifest.permission.RECORD_AUDIO
+    };
+
+    public PermissionHandler(Context context) {
+        this.context = context;
+    }
+
+    public boolean hasPermissions() {
+        boolean permissionState = true;
+        for (String permission: permissions) {
+            permissionState = permissionState && ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED;
+        }
+        return permissionState;
+    }
+
+    public void getPermissions() {
+        if (!hasPermissions())
+            ActivityCompat.requestPermissions((Activity) context, permissions, PERMISSION_REQUEST_CODE);
+    }
+
+    public void showPermissionToast() {
+        if (hasPermissions())
+            Toast.makeText(context, "permissions available", Toast.LENGTH_SHORT).show();
+        else
+            Toast.makeText(context, "permissions missing", Toast.LENGTH_SHORT).show();
+    }
+}