don't let users edit their name when not connected to radio

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

@@ -29,6 +29,7 @@ import com.geeksville.mesh.MainActivity
 import com.geeksville.mesh.R
 import com.geeksville.mesh.anonymized
 import com.geeksville.mesh.model.UIViewModel
+import com.geeksville.mesh.service.MeshService
 import com.geeksville.mesh.service.RadioInterfaceService
 import com.geeksville.util.exceptionReporter
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
@@ -310,6 +311,11 @@ class SettingsFragment : ScreenFragment("Settings"), Logging {
             usernameEditText.setText(name)
         })
 
+        // Only let user edit their name while connected to a radio
+        model.isConnected.observe(viewLifecycleOwner, Observer { connected ->
+            usernameView.isEnabled = connected == MeshService.ConnectionState.CONNECTED
+        })
+
         usernameEditText.on(EditorInfo.IME_ACTION_DONE) {
             debug("did IME action")
             val n = usernameEditText.text.toString().trim()

app/src/main/res/layout/settings_fragment.xml

@@ -20,7 +20,7 @@
         app:layout_constraintTop_toBottomOf="@+id/deviceRadioGroup" />
 
     <com.google.android.material.textfield.TextInputLayout
-        android:id="@+id/textInputLayout2"
+        android:id="@+id/usernameView"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="16dp"
@@ -49,7 +49,7 @@
         android:text="@string/looking_for_meshtastic_devices"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/textInputLayout2" />
+        app:layout_constraintTop_toBottomOf="@+id/usernameView" />
 
     <ProgressBar
         android:id="@+id/scanProgressBar"