From 0f98c4e8bfaedc010b8845470fd3493d28541d5e Mon Sep 17 00:00:00 2001
From: bob joe <matthew@krupczak.org>
Date: Sun, 21 Jul 2024 20:39:29 -0700
Subject: [PATCH] fix null pointer in CoT debug mode for some drone cameras

---
 .../com/openathena/CursorOnTargetSender.java     |  2 ++
 .../main/java/com/openathena/MainActivity.java   | 16 ++++++++++++----
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/app/src/main/java/com/openathena/CursorOnTargetSender.java b/app/src/main/java/com/openathena/CursorOnTargetSender.java
index f911faf..53577a8 100644
--- a/app/src/main/java/com/openathena/CursorOnTargetSender.java
+++ b/app/src/main/java/com/openathena/CursorOnTargetSender.java
@@ -218,6 +218,8 @@ public static String buildCoT(String uid, String imageISO, String nowAsISO, Stri
             detail.appendChild(precisionlocation);
 
             if (!oaInfoMap.isEmpty()) {
+                // Log.d("CursorOnTargetSender", "oaInfoMap keySet: " + oaInfoMap.keySet().toString());
+                // Log.d("CursorOnTargetSender", "oaInfoMap values: " + oaInfoMap.values().toString());
                 Element openAthenaCalculationInfo = doc.createElement("openAthenaCalculationInfo");
                 double theta = Math.toDegrees(Math.atan2(Double.parseDouble(le),Double.parseDouble(ce)));
                 openAthenaCalculationInfo.setAttribute("raySlantAngleDeg", String.valueOf(theta));
diff --git a/app/src/main/java/com/openathena/MainActivity.java b/app/src/main/java/com/openathena/MainActivity.java
index 52c9a4e..caf1a36 100644
--- a/app/src/main/java/com/openathena/MainActivity.java
+++ b/app/src/main/java/com/openathena/MainActivity.java
@@ -220,7 +220,7 @@ protected void onCreate(Bundle savedInstanceState) {
         // Restore the user's custom droneModels.json drone camera intrinsics database (if so configured)
         String storedDroneModelsJsonUriString = sharedPreferences.getString("droneModelsJsonUri", null);
         DroneParametersFromJSON droneModelsParser = MetadataExtractor.parameterProvider;
-        if (storedDroneModelsJsonUriString != null && !storedDroneModelsJsonUriString.isBlank()) {
+        if (storedDroneModelsJsonUriString != null && !storedDroneModelsJsonUriString.isEmpty()) {
             try {
                 droneModelsParser.loadJSONFromUri(Uri.parse(storedDroneModelsJsonUriString));
             } catch (IOException | JSONException e) {
@@ -707,9 +707,9 @@ public void calculateImage(View view, boolean shouldISendCoT)
             // yikes
             if (IS_EXTENDED_COT_MODE_ACTIVE) {
                 openAthenaCalculationInfo.put("focalLength", roundDouble(MetadataExtractor.rationalToFloat(exif.getAttribute(ExifInterface.TAG_FOCAL_LENGTH))));
-                openAthenaCalculationInfo.put("digitalZoomRatio", exif.getAttribute(ExifInterface.TAG_DIGITAL_ZOOM_RATIO));
-                openAthenaCalculationInfo.put("imageWidth", exif.getAttribute(ExifInterface.TAG_IMAGE_WIDTH));
-                openAthenaCalculationInfo.put("imageLength", exif.getAttribute(ExifInterface.TAG_IMAGE_LENGTH));
+                openAthenaCalculationInfo.put("digitalZoomRatio", zeroStringIfNull(exif.getAttribute(ExifInterface.TAG_DIGITAL_ZOOM_RATIO)));
+                openAthenaCalculationInfo.put("imageWidth", zeroStringIfNull(exif.getAttribute(ExifInterface.TAG_IMAGE_WIDTH)));
+                openAthenaCalculationInfo.put("imageLength", zeroStringIfNull(exif.getAttribute(ExifInterface.TAG_IMAGE_LENGTH)));
             }
 
             double[] intrinsics = MetadataExtractor.getIntrinsicMatrixFromExif(exif);
@@ -1165,6 +1165,14 @@ private static String roundDouble(double d) {
         return df.format(d);
     }
 
+    private static String zeroStringIfNull(String s) {
+        if (s == null || s.isEmpty()) {
+            return "0.0";
+        } else {
+            return s;
+        }
+    }
+
     private void appendText(final String aStr) {
         runOnUiThread(new Runnable() {
             @Override