Kamera implementiert und Preview im Interface

Zusätzlich eintragen der Berechtigungen und der extra Klasse KameraAktivitaet im Manifest eingetragen

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

-package com.example.greenwatch;
-
-public class Kamera {
-}

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

 import android.media.Image;
 import android.os.Bundle;
 import android.util.Size;
+import android.widget.TextView;
 
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.camera.core.CameraSelector;
 
 import com.google.common.util.concurrent.ListenableFuture;
 
+import java.nio.ByteBuffer;
 import java.util.concurrent.ExecutionException;
 
 public class KameraAktivitaet extends AppCompatActivity {
     private PreviewView previewView;
+    private TextView alarm;
+    private TextView alarm2;
+    private boolean isMotionDetected;
+
+    private ByteBuffer previousBuffer;
+    private int previousWidth;
+    private int previousHeight;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_demo_kamera2_nebenaktivitaet);
+        alarm = findViewById(R.id.luminanz);
+        alarm2 = findViewById(R.id.orientierung);
         previewView = findViewById(R.id.previewView);
         final ListenableFuture<ProcessCameraProvider> cameraProviderFuture = ProcessCameraProvider.getInstance(this);
         cameraProviderFuture.addListener(() -> {
         imageAnalysis.setAnalyzer(
                 ContextCompat.getMainExecutor(this),
                 imageProxy -> {
+
                     int imageFormat = imageProxy.getFormat();
+
                     if (imageFormat == ImageFormat.YUV_420_888) {
-                        Image image = imageProxy.getImage();
+
+                        Image currentImage = imageProxy.getImage();
+
+                        if (previousHeight != 0) {
+                            assert currentImage != null;
+                            isMotionDetected = compareFrames(currentImage);
+                        }
+
+                        assert currentImage != null;
+                        Image.Plane[] planes = currentImage.getPlanes();
+                        ByteBuffer buffer = planes[0].getBuffer().duplicate();
+                        previousBuffer = ByteBuffer.allocateDirect(buffer.remaining());
+                        previousBuffer.put(buffer);
+                        previousWidth = currentImage.getWidth();
+                        previousHeight = currentImage.getHeight();
+
+                        currentImage.close();
+
+                        if (isMotionDetected) {
+
+                            alarm.setText("ALARM");
+                            runOnUiThread(() -> {
+                                    // Hier kannst du den Code für die Videoaufzeichnung oder andere Aktionen einfügen
+                                    // Beispiel: starteVideoAufzeichnung();
+                                });
+                            } else {
+                            alarm.setText("OK");
+                        }
                     }
                     imageProxy.close();
                 });
         CameraSelector cameraSelector = new CameraSelector.Builder().requireLensFacing(CameraSelector.LENS_FACING_BACK).build();
         preview.setSurfaceProvider(previewView.getSurfaceProvider());
         cameraProvider.bindToLifecycle(this, cameraSelector, imageAnalysis, preview);
+
+
+    }
+
+    private boolean compareFrames(Image currentImage) {
+
+        ByteBuffer currentBuffer = currentImage.getPlanes()[0].getBuffer();
+
+        int currentWidth = currentImage.getWidth();
+        int currentHeight = currentImage.getHeight();
+
+        // Überprüfe, ob die Größe der beiden Bilder übereinstimmt
+        if (previousWidth != currentWidth || previousHeight != currentHeight) {
+            return false;
+        }
+
+        // Überprüfe die Pixelwerte für jede Zeile und Spalte
+        for (int row = 0; row < previousHeight; row++) {
+            for (int col = 0; col < previousWidth; col++) {
+                // Berechne den Index des aktuellen Pixels im ByteBuffer
+                int previousIndex = row * previousWidth + col;
+                int currentIndex = row * currentWidth + col;
+
+                // Lese die Pixelwerte für den aktuellen Pixel
+                int previousPixel = previousBuffer.get(previousIndex) & 0xFF;
+                int currentPixel = currentBuffer.get(currentIndex) & 0xFF;
+
+                // Vergleiche die Pixelwerte und prüfe auf einen signifikanten Unterschied
+                int pixelDifference = Math.abs(previousPixel - currentPixel);
+                int threshold = 120;
+
+                if (pixelDifference > threshold) {
+                    String text = String.valueOf(pixelDifference);
+                    alarm2.setText(text);
+                    return true;
+                }
+            }
+        }
+
+        return false;
     }
 }
 

app/src/main/res/layout/activity_demo_kamera2_nebenaktivitaet.xml

         android:orientation="vertical">
 
         <TextView
-            android:id="@+id/alarm"
+            android:id="@+id/luminanz"
             android:layout_width="match_parent"
             android:layout_height="0dp"
             android:layout_weight="1"
-            android:text="" />
-
+            android:layout_gravity="center"
+            android:gravity="center"
+            android:text=""
+            android:textSize="100sp"
+            android:textColor="#9999ff"/>
         <TextView
-            android:id="@+id/luminanz"
+            android:id="@+id/orientierung"
             android:layout_width="match_parent"
             android:layout_height="0dp"
             android:layout_weight="1"
             android:layout_gravity="center"
             android:gravity="center"
+            android:text=""
             android:textSize="100sp"
             android:textColor="#9999ff"/>
     </LinearLayout>