bugfix: getSupportedFlashModes returns array empty in Android 14 SDK 34

#345

Changes:
- implemented the fix to flip/switch between the main front and back cameras and avoid switching to additional cameras

android/src/main/java/com/ahm/capacitor/camera/preview/CameraActivity.java

@@ -427,6 +427,42 @@ public Camera getCamera() {
         return mCamera;
     }
 
+    /**
+     * Method to get the front camera id if the current camera is back and visa versa
+     *
+     * @return front or back camera id depending on the currently active camera
+     */
+    private int getNextCameraId() {
+        int nextCameraId = 0;
+
+        // Find the total number of cameras available
+        // NOTE: The getNumberOfCameras() method in Android's android.hardware.camera API returns the total
+        // number of cameras available on the device. The number might not be limited to just the front
+        // and back cameras because modern smartphones often come with more than two cameras.
+        // For example, devices might have:
+        // - a main (back) camera.
+        // - a wide-angle camera.
+        // - a telephoto camera.
+        // - a depth-sensing camera.
+        // - an ultrawide camera.
+        // - a macro camera.
+        // etc.
+        numberOfCameras = Camera.getNumberOfCameras();
+
+        int nextFacing = cameraCurrentlyLocked == Camera.CameraInfo.CAMERA_FACING_BACK ? Camera.CameraInfo.CAMERA_FACING_FRONT : Camera.CameraInfo.CAMERA_FACING_BACK;
+
+        // Find the next ID of the camera to switch to (front if the current is back and visa versa)
+        Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
+        for (int i = 0; i < numberOfCameras; i++) {
+            Camera.getCameraInfo(i, cameraInfo);
+            if (cameraInfo.facing == nextFacing) {
+                nextCameraId = i;
+                break;
+            }
+        }
+        return nextCameraId;
+    }
+
     public void switchCamera() {
         // check for availability of multiple cameras
         if (numberOfCameras == 1) {
@@ -444,7 +480,7 @@ public void switchCamera() {
 
             Log.d(TAG, "cameraCurrentlyLocked := " + Integer.toString(cameraCurrentlyLocked));
             try {
-                cameraCurrentlyLocked = (cameraCurrentlyLocked + 1) % numberOfCameras;
+                cameraCurrentlyLocked = getNextCameraId();
                 Log.d(TAG, "cameraCurrentlyLocked new: " + cameraCurrentlyLocked);
             } catch (Exception exception) {
                 Log.d(TAG, exception.getMessage());