new notification status stuff seems to work

app/src/main/java/com/geeksville/mesh/service/MeshService.kt

@@ -268,8 +268,7 @@ class MeshService : Service(), Logging {
         chan.lightColor = Color.BLUE
         chan.importance = NotificationManager.IMPORTANCE_NONE
         chan.lockscreenVisibility = Notification.VISIBILITY_PRIVATE
-        val service = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
-        service.createNotificationChannel(chan)
+        notificationManager.createNotificationChannel(chan)
         return channelId
     }
 
@@ -278,7 +277,8 @@ class MeshService : Service(), Logging {
         getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
     }
 
-    val channelId =
+    /// This must be lazy because we use Context
+    private val channelId: String by lazy() {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             createNotificationChannel()
         } else {
@@ -286,10 +286,11 @@ class MeshService : Service(), Logging {
             // https://developer.android.com/reference/android/support/v4/app/NotificationCompat.Builder.html#NotificationCompat.Builder(android.content.Context)
             ""
         }
+    }
 
-    private val mainAppIntent = Intent(this, MainActivity::class.java)
-    private val openAppIntent = PendingIntent.getActivity(this, 0, mainAppIntent, 0)
-    private val notificationBuilder = NotificationCompat.Builder(this, channelId)
+    private val openAppIntent: PendingIntent by lazy() {
+        PendingIntent.getActivity(this, 0, Intent(this, MainActivity::class.java), 0)
+    }
 
     /// A text message that has a arrived since the last notification update
     private var recentReceivedText: TextMessage? = null
@@ -298,7 +299,7 @@ class MeshService : Service(), Logging {
         get() = if (!isConnected)
             "No radio connected"
         else
-            "Connected $numOnlineNodes / $numNodes online"
+            "Connected: $numOnlineNodes of $numNodes online"
 
     override fun toString() = summaryString
 
@@ -307,11 +308,13 @@ class MeshService : Service(), Logging {
      */
     private fun createNotification(): Notification {
 
+        val notificationBuilder = NotificationCompat.Builder(this, channelId)
+
         val builder = notificationBuilder.setOngoing(true)
             .setPriority(PRIORITY_MIN)
             .setCategory(if (recentReceivedText != null) Notification.CATEGORY_SERVICE else Notification.CATEGORY_MESSAGE)
             .setSmallIcon(android.R.drawable.stat_sys_data_bluetooth)
-            .setContentTitle("Meshtastic: $summaryString") // leave this off for now so our notification looks smaller
+            .setContentTitle(summaryString) // leave this off for now so our notification looks smaller
             .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
             .setContentIntent(openAppIntent)
 
@@ -643,7 +646,7 @@ class MeshService : Service(), Logging {
     /// If we just changed our nodedb, we might want to do somethings
     private fun onNodeDBChanged() {
         updateNotification()
-        
+
         // we don't ask for GPS locations from android if our device has a built in GPS
         if (!myNodeInfo!!.hasGPS) {
             // If we have at least one other person in the mesh, send our GPS position otherwise stop listening to GPS

app/src/main/java/com/geeksville/mesh/ui/BTScanScreen.kt

@@ -7,8 +7,10 @@ import android.os.ParcelUuid
 import androidx.compose.*
 import androidx.compose.frames.modelMapOf
 import androidx.ui.core.ContextAmbient
+import androidx.ui.core.LayoutModifier
 import androidx.ui.core.Text
 import androidx.ui.layout.Column
+import androidx.ui.layout.LayoutGravity
 import androidx.ui.material.CircularProgressIndicator
 import androidx.ui.material.EmphasisLevels
 import androidx.ui.material.ProvideEmphasis
@@ -136,7 +138,7 @@ fun BTScanScreen() {
             Text("An unexpected error was encountered.  Please file a bug on our github: ${ScanUIState.errorText}")
         } else {
             if (ScanUIState.devices.isEmpty()) {
-                Text("Looking for Meshtastic devices... (zero found)")
+                Text(text = "Looking for Meshtastic devices... (zero found)", modifier = LayoutGravity.Center)
 
                 CircularProgressIndicator() // Show that we are searching still
             } else {

app/src/main/res/drawable/ic_baseline_settings_input_antenna_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M12,5c-3.87,0 -7,3.13 -7,7h2c0,-2.76 2.24,-5 5,-5s5,2.24 5,5h2c0,-3.87 -3.13,-7 -7,-7zM13,14.29c0.88,-0.39 1.5,-1.26 1.5,-2.29 0,-1.38 -1.12,-2.5 -2.5,-2.5S9.5,10.62 9.5,12c0,1.02 0.62,1.9 1.5,2.29v3.3L7.59,21 9,22.41l3,-3 3,3L16.41,21 13,17.59v-3.3zM12,1C5.93,1 1,5.93 1,12h2c0,-4.97 4.03,-9 9,-9s9,4.03 9,9h2c0,-6.07 -4.93,-11 -11,-11z"/>
+</vector>