V4.2.4 - fault rather than crash if bluetooth system crashes.

CHANGELOG.md

@@ -1,6 +1,7 @@
 	OpenSeizureDetector Android App - Change Log
 	============================================
 
+    V4.2.4 - Added checks and a FAULT condition for Bluetooth errors in Bluetooth Data Source
     V4.2.3 - Uses 3d accelerometer data to calculate magnitude if vector magnitude is not sent from data source.
            - fixed latched alarms (Issue #146)
            - fixed HR alarms selection issue (#153)

app/src/main/AndroidManifest.xml

@@ -2,7 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:versionCode="138"
-    android:versionName="4.2.4b">
+    android:versionName="4.2.4">
     <!-- android:allowBackup="false" -->
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />

app/src/main/java/uk/org/openseizuredetector/SdDataSourceBLE.java

@@ -368,7 +368,20 @@ public class SdDataSourceBLE extends SdDataSource {
          * @param gattCharacteristic - the characteristic to be read.
          */
         private void executeReadCharacteristic(BluetoothGattCharacteristic gattCharacteristic) {
-            if (gattCharacteristic != null) {
+            if (gattCharacteristic == null) {
+                Log.i(TAG, "ExecuteReadCharacteristic() - gatCharacteristic is null, so not doing anything");
+                mUtil.showToast("ERROR: gatCharacteristic is null - this should not happen");
+                mSdDataReceiver.onSdDataFault(mSdData);
+                return;
+            }
+            if (mBluetoothGatt == null) {
+                Log.e(TAG, "executeReadCharacteristic() - mBluetoothGatt is null - Characteristic=" + gattCharacteristic.getUuid().toString());
+                mUtil.showToast("ERROR: mGatCharacteristic is null - this should not happen");
+                mSdDataReceiver.onSdDataFault(mSdData);
+                return;
+            }
+
+            // To get here both gatCharacteristic and mBluetoothGatt must be non-null
             boolean retVal = mBluetoothGatt.readCharacteristic(gattCharacteristic);
             if (retVal) {
                 Log.d(TAG, "executeReadCharacteristic - read initiated successfully");
@@ -381,9 +394,6 @@ public class SdDataSourceBLE extends SdDataSource {
                     }
                 }, 100);
             }
-            } else {
-                Log.i(TAG,"ExecuteReadCharacteristic() - gatCharacteristic is null, so not doing anything");
-            }
         }
 
         /**
@@ -391,12 +401,26 @@ public class SdDataSourceBLE extends SdDataSource {
          * of a given characteristic.
          * Because only one BLE operation can be taking place at a time, it may fail, in which case
          * the read is re-tried after a 100ms delay.
+         *
          * @param gattCharacteristic - the characteristic to be read.
          * @param valBytes[]         - array of bytes to send
          * @param nBytes             - number of bytes to send.
          */
         private void executeWriteCharacteristic(BluetoothGattCharacteristic gattCharacteristic, byte[] valBytes) {
-            if (gattCharacteristic != null) {
+            if (gattCharacteristic == null) {
+                Log.i(TAG, "ExecuteWriteCharacteristic() - gatCharacteristic is null, so not doing anything");
+                mUtil.showToast("ERROR: gatCharacteristic is null - this should not happen");
+                mSdDataReceiver.onSdDataFault(mSdData);
+                return;
+            }
+            if (mBluetoothGatt == null) {
+                Log.e(TAG, "executeWriteCharacteristic() - mBluetoothGatt is null - Characteristic=" + gattCharacteristic.getUuid().toString());
+                mUtil.showToast("ERROR: mGatCharacteristic is null - this should not happen");
+                mSdDataReceiver.onSdDataFault(mSdData);
+                return;
+            }
+
+            // To get here both gatCharacteristic and mBluetoothGatt must be non-null
             gattCharacteristic.setValue(valBytes);
             boolean retVal = mBluetoothGatt.writeCharacteristic(gattCharacteristic);
             if (retVal) {
@@ -410,9 +434,6 @@ public class SdDataSourceBLE extends SdDataSource {
                     }
                 }, 100);
             }
-            } else {
-                Log.i(TAG,"ExecuteWriteCharacteristic() - gatCharacteristic is null, so not doing anything");
-            }
         }
 
 

app/src/main/res/values/strings.xml

@@ -2,8 +2,9 @@
 <resources>
     <string name="app_name">OpenSeizureDetector</string>
     <string name="changelog">
-        "\n
+        "\nV4.2.4 - Fault alarm rather than crash if bluetooth system crashes.
-        \nV4.2.1 - Added support for PineTime Watches using Bluetooth data source.
+        \nV4.2.3 - Bug Fixes (heart rate alarm and latched alarm issues)
+        \nV4.2   - Added support for PineTime Watches using Bluetooth data source.
         \n       - Added new, swipeable user interface to simplify the main screen..
           "</string>
     <string name="UpgradeMsg">