feat: add action icons

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

@@ -14,7 +14,7 @@ import androidx.recyclerview.widget.RecyclerView
 
 interface Action {
     fun getLabel(): String
-    fun getIcon(): String
+    fun getIcon(): Int?
     fun execute(): Unit
 }
 
@@ -70,6 +70,7 @@ class DeviceListAdapter(
             deviceActions = view.findViewById(R.id.device_actions)
         }
 
+        @SuppressLint("RestrictedApi")
         fun bind(result: DeviceListEntry) {
             deviceNameView.text = result.name ?: "<N/A>"
             macAddressView.text = result.address
@@ -90,13 +91,18 @@ class DeviceListAdapter(
             deviceActions.setOnClickListener {
                 val popup = PopupMenu(context, deviceActions)
                 result.getActions().forEach { action ->
-                    popup.menu.add(action.getLabel())
-                        .setOnMenuItemClickListener { menuItem ->
-                            action.execute()
-                            true
-                        }
+                    val menuItem = popup.menu.add(action.getLabel())
+                    menuItem.setOnMenuItemClickListener { item ->
+                        action.execute()
+                        true
+                    }
+                    val menuIcon = action.getIcon()
+                    if (menuIcon != null) {
+                        menuItem.setIcon(menuIcon)
+                    }
                 }
                 val inflater = popup.menuInflater
+                popup.setForceShowIcon(true)
                 inflater.inflate(R.menu.device_menu, popup.menu)
                 popup.show()
             }

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

@@ -195,8 +195,8 @@ class KirbyDevice(
                     return "Connect"
                 }
 
-                override fun getIcon(): String {
-                    return ""
+                override fun getIcon(): Int {
+                    return R.drawable.action_icon_connect
                 }
 
                 override fun execute() {
@@ -213,8 +213,8 @@ class KirbyDevice(
                     return "Disconnect"
                 }
 
-                override fun getIcon(): String {
-                    return ""
+                override fun getIcon(): Int {
+                    return R.drawable.action_icon_disconnect
                 }
 
                 override fun execute() {
@@ -227,8 +227,8 @@ class KirbyDevice(
                     return "Fetch Measurement"
                 }
 
-                override fun getIcon(): String {
-                    TODO("Not yet implemented")
+                override fun getIcon(): Int {
+                    return R.drawable.action_icon_fetch_measurement
                 }
 
                 override fun execute() {
@@ -242,8 +242,8 @@ class KirbyDevice(
                         return "Subscribe"
                     }
 
-                    override fun getIcon(): String {
-                        return ""
+                    override fun getIcon(): Int {
+                        return R.drawable.action_icon_subscribe
                     }
 
                     override fun execute() {
@@ -261,8 +261,8 @@ class KirbyDevice(
                     return "Unsubscribe"
                 }
 
-                override fun getIcon(): String {
-                    return ""
+                override fun getIcon(): Int {
+                    return R.drawable.action_icon_subscribe_disable
                 }
 
                 override fun execute() {

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

@@ -121,6 +121,9 @@ class MainActivity : AppCompatActivity() {
             override fun onScanningStateChange(isScanning: Boolean) {
                 runOnUiThread {
                     binding.fab.setText(if (isScanning) "Stop Scan" else "Start Scan")
+                    binding.fab.setIconResource(
+                        if (isScanning) R.drawable.action_icon_disconnect else R.drawable.action_icon_scan
+                    )
                 }
             }
 
@@ -338,8 +341,8 @@ class DummyListEntry(override val address: String) : DeviceListEntry {
                 return "Test action 1"
             }
 
-            override fun getIcon(): String {
-                return ""
+            override fun getIcon(): Int? {
+                return R.drawable.action_icon_disconnect
             }
 
             override fun execute() {
@@ -350,8 +353,8 @@ class DummyListEntry(override val address: String) : DeviceListEntry {
                 return "Test action 2"
             }
 
-            override fun getIcon(): String {
-                return ""
+            override fun getIcon(): Int? {
+                return R.drawable.action_icon_connect
             }
 
             override fun execute() {