Preserve selected map type across app restarts

app/src/main/java/net/vonforst/evmap/fragment/MapFragment.kt

@@ -729,6 +729,7 @@ class MapFragment : Fragment(), OnMapReadyCallback, MapsActivity.FragmentCallbac
                 backPressedCallback.handleOnBackPressed()
             }
         }
+        map.setMapType(vm.mapType.value)
 
         // set padding so that compass is not obstructed by toolbar
         map.setPadding(0, binding.toolbarContainer.height, 0, 0)

app/src/main/java/net/vonforst/evmap/storage/PreferenceDataSource.kt

@@ -2,6 +2,7 @@ package net.vonforst.evmap.storage
 
 import android.content.Context
 import androidx.preference.PreferenceManager
+import com.car2go.maps.AnyMap
 import net.vonforst.evmap.R
 import net.vonforst.evmap.viewmodel.FILTERS_CUSTOM
 import net.vonforst.evmap.viewmodel.FILTERS_DISABLED
@@ -73,6 +74,12 @@ class PreferenceDataSource(val context: Context) {
             context.getString(R.string.pref_map_provider_default)
         )!!
 
+    var mapType: AnyMap.Type
+        get() = AnyMap.Type.valueOf(sp.getString("map_type", null) ?: AnyMap.Type.NORMAL.toString())
+        set(type) {
+            sp.edit().putString("map_type", type.toString()).apply()
+        }
+
     var welcomeDialogShown: Boolean
         get() = sp.getBoolean("welcome_dialog_shown", false)
         set(value) {

app/src/main/java/net/vonforst/evmap/viewmodel/MapViewModel.kt

@@ -210,7 +210,10 @@ class MapViewModel(application: Application, geApiKey: String) : AndroidViewMode
 
     val mapType: MutableLiveData<AnyMap.Type> by lazy {
         MutableLiveData<AnyMap.Type>().apply {
-            value = AnyMap.Type.NORMAL
+            value = prefs.mapType
+            observeForever {
+                prefs.mapType = it
+            }
         }
     }