From 467fd0cc7fcd2e3eba17b06685f4b8ce2e6199c2 Mon Sep 17 00:00:00 2001
From: Graham Jones <grahamjones139@gmail.com>
Date: Fri, 3 Feb 2023 21:57:12 +0000
Subject: [PATCH] Fixed crash on devices without Google Play Services installed
 (which provides TensorFlowLite)

---
 app/src/main/java/uk/org/openseizuredetector/SdAlgNn.java | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/uk/org/openseizuredetector/SdAlgNn.java b/app/src/main/java/uk/org/openseizuredetector/SdAlgNn.java
index a03fcff..a6e4d6e 100644
--- a/app/src/main/java/uk/org/openseizuredetector/SdAlgNn.java
+++ b/app/src/main/java/uk/org/openseizuredetector/SdAlgNn.java
@@ -63,7 +63,9 @@ public class SdAlgNn {
 
     public void close() {
         Log.d(TAG,"close()");
-        interpreter.close();
+        if (interpreter != null) {
+            interpreter.close();
+        }
     }
 
     public float getPseizure(SdData sdData) {
@@ -73,6 +75,10 @@ public class SdAlgNn {
         for (int j = 0; j < 125; j++) {
             modelInput[0][j][0] = (float)sdData.rawData[j];
         }
+        if (interpreter == null) {
+            Log.d(TAG,"getPSeizure() - interpreter is null - returning zero seizure probability");
+            return (0.0f);
+        }
         interpreter.run(modelInput, modelOutput);
         Log.d(TAG,"run - pSeizure="+modelOutput[0][1]);
         return(modelOutput[0][1]);