✨ [android] add handleOnPause and handleOnResume methods

android/src/main/java/com/dutchconcepts/capacitor/barcodescanner/BarcodeScanner.java

@@ -33,6 +33,7 @@ public class BarcodeScanner extends Plugin implements BarcodeCallback {
     private boolean didRunCameraSetup = false;
     private boolean didRunCameraPrepare = false;
     private boolean isBackgroundHidden = false;
+    private String actionOnResume = null;
 
     private boolean hasCamera() {
         // @TODO(): check: https://stackoverflow.com/a/57974578/8634342
@@ -82,7 +83,7 @@ private void setupCamera() {
         didRunCameraSetup = true;
     }
 
-    private void dismantleCamera() {
+    private void dismantleCamera(Boolean freeSavedCallFlag) {
         // opposite of setupCamera
 
         getActivity()
@@ -101,15 +102,15 @@ private void dismantleCamera() {
         didRunCameraPrepare = false;
 
         // If a call is saved and a scan will not run, free the saved call
-        if (getSavedCall() != null && !shouldRunScan) {
+        if (freeSavedCallFlag && getSavedCall() != null && !shouldRunScan) {
             freeSavedCall();
         }
     }
 
     private void prepare() {
         // undo previous setup
         // because it may be prepared with a different config
-        dismantleCamera();
+        dismantleCamera(true);
 
         // setup camera with new config
         setupCamera();
@@ -125,7 +126,7 @@ private void prepare() {
     private void destroy() {
         showBackground();
 
-        dismantleCamera();
+        dismantleCamera(true);
     }
 
     private void scan() {
@@ -200,6 +201,25 @@ public void barcodeResult(BarcodeResult barcodeResult) {
         destroy();
     }
 
+    @Override
+    public void handleOnPause() {
+        if (isScanning) {
+            actionOnResume = "scan";
+        } else {
+            actionOnResume = null;
+        }
+        dismantleCamera(false);
+    }
+
+    @Override
+    public void handleOnResume() {
+        if (actionOnResume != null) {
+            if (actionOnResume.equals("scan")) {
+                scan();
+            }
+        }
+    }
+
     @Override
     public void possibleResultPoints(List<ResultPoint> resultPoints) {}