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

@@ -34,7 +34,6 @@ public class MainActivity extends AppCompatActivity {
         TextView textView = findViewById(R.id.textView);
         PreviewView previewView = findViewById(R.id.previewView);
 
-        getCameraAccess();
 
         VideoDetector vd = new VideoDetector(this);
         vd.setPreviewView(previewView);
@@ -42,11 +41,27 @@ public class MainActivity extends AppCompatActivity {
             @Override
             public void onDetection(@NonNull DetectionReport detectionReport) {
                 detectionReport.log("OnDetection");
-                textView.setText("Alarm:\t[" + String.valueOf(detectionReport.detectedValue) + "]");
+                textView.setText(detectionReport.toString());
             }
         });
-        vd.startDetection();
+        //vd.startDetection();
 
+
+        ToggleButton toggleButton = findViewById(R.id.previewButton);
+        toggleButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                getCameraAccess();
+                if (isCameraAccessAllowed() && toggleButton.isChecked())
+                {
+                    vd.startDetection();
+                }
+                else {
+                    vd.stopDetection();
+                    textView.setText("");
+                }
+            }
+        });
     }
 
     private boolean isCameraAccessAllowed() {

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

@@ -33,7 +33,7 @@ public class VideoDetector extends Detector {
     private PreviewView previewView = null;
     // Detect Violation
     private static final float PIXEL_THRESHOLD = 30f;  // Luminosity (brightness channel of YUV_420_888)
-    private static final float ALARM_THRESHOLD = 0.5f;   // Percent of pixels changed
+    private static final float ALARM_THRESHOLD = 1f;   // Percent of pixels changed
     private ByteBuffer previousBuffer = null;
 
 

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

@@ -14,13 +14,18 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text=""
-        android:textSize="30sp"
+        android:textSize="20dp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
 
+    <ToggleButton
+        android:id="@+id/previewButton"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="ToggleButton" />
 
 
     <androidx.camera.view.PreviewView