feat: show number of retrieved measurements

app/src/main/java/com/example/sensortestingapp/KirbyDevice.kt

@@ -176,7 +176,6 @@ class KirbyDevice(
     override var hasRunningOp: Boolean = false
 
     override var rssi: Int? = null
-    
 
     private fun addMeasurement(characteristic: BluetoothGattCharacteristic) {
         if (characteristic.service.uuid == DEMO_SERVICE_UUID && characteristic.uuid == DEMO_CHAR_UUID) {
@@ -211,7 +210,21 @@ class KirbyDevice(
             return emptyList()
         }
         val latest = measurements.last()
-        return demoPayloadToMeasurements(latest)
+        val result = mutableListOf<Measurement>(object : Measurement {
+            override fun getLabel(): String {
+                return "Index"
+            }
+
+            override fun getIcon(): Int {
+                return R.drawable.baseline_numbers_24
+            }
+
+            override fun getFormattedValue(): String {
+                return measurements.size.toString()
+            }
+        })
+        result.addAll(demoPayloadToMeasurements(latest))
+        return result
     }
 
     override fun getActions(): List<Action> {

app/src/main/res/drawable/baseline_numbers_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M20.5,10L21,8h-4l1,-4h-2l-1,4h-4l1,-4h-2L9,8H5l-0.5,2h4l-1,4h-4L3,16h4l-1,4h2l1,-4h4l-1,4h2l1,-4h4l0.5,-2h-4l1,-4H20.5zM13.5,14h-4l1,-4h4L13.5,14z"/>
+</vector>