channel uncompose kinda works

app/src/main/java/com/geeksville/mesh/model/UIState.kt

@@ -7,6 +7,8 @@ import android.os.Bundle
 import android.os.RemoteException
 import androidx.compose.mutableStateOf
 import androidx.core.content.edit
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
 import com.geeksville.android.BuildUtils.isEmulator
 import com.geeksville.android.Logging
 import com.geeksville.mesh.IMeshService
@@ -14,6 +16,55 @@ import com.geeksville.mesh.MeshProtos
 import com.geeksville.mesh.service.MeshService
 import com.geeksville.mesh.ui.getInitials
 
+class UIViewModel : ViewModel(), Logging {
+    init {
+        debug("ViewModel created")
+    }
+
+    companion object {
+        /**
+         * Return the current channel info
+         * FIXME, we should sim channels at the MeshService level if we are running on an emulator,
+         * for now I just fake it by returning a canned channel.
+         */
+        fun getChannel(c: MeshProtos.RadioConfig?): Channel? {
+            val channel = c?.channelSettings?.let { Channel(it) }
+
+            return if (channel == null && isEmulator)
+                Channel.emulated
+            else
+                channel
+        }
+
+        fun getPreferences(context: Context): SharedPreferences =
+            context.getSharedPreferences("ui-prefs", Context.MODE_PRIVATE)
+    }
+
+    override fun onCleared() {
+        super.onCleared()
+        debug("ViewModel cleared")
+    }
+
+    var meshService: IMeshService? = null
+
+    /// Are we connected to our radio device
+    val isConnected = MutableLiveData(MeshService.ConnectionState.DISCONNECTED)
+
+    /// various radio settings (including the channel)
+    val radioConfig = MutableLiveData<MeshProtos.RadioConfig?>(null)
+
+    /// Set the radio config (also updates our saved copy in preferences)
+    fun setRadioConfig(context: Context, c: MeshProtos.RadioConfig) {
+        debug("Setting new radio config!")
+        meshService?.radioConfig = c.toByteArray()
+        radioConfig.value = c
+
+        getPreferences(context).edit(commit = true) {
+            this.putString("channel-url", UIState.getChannel()!!.getChannelUrl().toString())
+        }
+    }
+}
+
 /// FIXME - figure out how to merge this staate with the AppStatus Model
 object UIState : Logging {
 

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

@@ -5,7 +5,11 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.ArrayAdapter
+import android.widget.AutoCompleteTextView
 import androidx.compose.Composable
+import androidx.fragment.app.activityViewModels
+import androidx.lifecycle.Observer
 import androidx.ui.core.ContextAmbient
 import androidx.ui.foundation.Text
 import androidx.ui.input.ImeAction
@@ -19,22 +23,48 @@ import com.geeksville.android.GeeksvilleApplication
 import com.geeksville.android.Logging
 import com.geeksville.mesh.R
 import com.geeksville.mesh.model.Channel
+import com.geeksville.mesh.model.UIViewModel
 import com.geeksville.mesh.model.toHumanString
-
+import com.google.android.material.textfield.TextInputEditText
 
 object ChannelLog : Logging
 
 
 class ChannelFragment : ScreenFragment("Channel"), Logging {
 
+    private val model: UIViewModel by activityViewModels()
+
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
-    ): View? = inflater.inflate(R.layout.channel_fragment, container, false)
-
+    ): View? {
+        return inflater.inflate(R.layout.channel_fragment, container, false)
+    }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+
+        model.radioConfig.observe(viewLifecycleOwner, Observer { config ->
+            val channel = UIViewModel.getChannel(config)
+            val channelNameEdit = view.findViewById<TextInputEditText>(R.id.channelNameEdit)
+
+            if (channel != null) {
+                channelNameEdit.visibility = View.VISIBLE
+                channelNameEdit.setText(channel.name)
+            } else {
+                channelNameEdit.visibility = View.INVISIBLE
+            }
+
+            val adapter = ArrayAdapter(
+                requireContext(),
+                R.layout.dropdown_menu_popup_item,
+                arrayOf("Item 1", "Item 2", "Item 3", "Item 4")
+            )
+
+            val editTextFilledExposedDropdown =
+                view.findViewById<AutoCompleteTextView>(R.id.filled_exposed_dropdown)
+            editTextFilledExposedDropdown.setAdapter(adapter)
+        })
     }
 }