add setting for how to open Maps app

app/src/main/java/net/vonforst/evmap/MapsActivity.kt

@@ -13,6 +13,7 @@ import androidx.navigation.ui.setupWithNavController
 import com.google.android.material.navigation.NavigationView
 import com.google.android.material.snackbar.Snackbar
 import net.vonforst.evmap.api.goingelectric.ChargeLocation
+import net.vonforst.evmap.storage.PreferenceDataSource
 
 const val REQUEST_LOCATION_PERMISSION = 1
 
@@ -26,6 +27,7 @@ class MapsActivity : AppCompatActivity() {
     private lateinit var navController: NavController
     lateinit var appBarConfiguration: AppBarConfiguration
     var fragmentCallback: FragmentCallback? = null
+    private lateinit var prefs: PreferenceDataSource
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -42,6 +44,8 @@ class MapsActivity : AppCompatActivity() {
             findViewById<DrawerLayout>(R.id.drawer_layout)
         )
         findViewById<NavigationView>(R.id.nav_view).setupWithNavController(navController)
+
+        prefs = PreferenceDataSource(this)
     }
 
     override fun onBackPressed() {
@@ -56,11 +60,11 @@ class MapsActivity : AppCompatActivity() {
         // google maps navigation
         intent.data = Uri.parse("google.navigation:q=${coord.lat},${coord.lng}")
         val pm = packageManager
-        if (intent.resolveActivity(pm) != null) {
+        if (intent.resolveActivity(pm) != null && prefs.navigateUseMaps) {
             startActivity(intent);
         } else {
             // fallback: generic geo intent
-            intent.data = Uri.parse("geo:${coord.lat},${coord.lng}")
+            intent.data = Uri.parse("geo:0,0?q=${coord.lat},${coord.lng}(${charger.name})")
             if (intent.resolveActivity(pm) != null) {
                 startActivity(intent);
             } else {

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

@@ -0,0 +1,36 @@
+package net.vonforst.evmap.fragment
+
+import android.os.Bundle
+import android.view.View
+import androidx.appcompat.widget.Toolbar
+import androidx.navigation.fragment.findNavController
+import androidx.navigation.ui.setupWithNavController
+import androidx.preference.Preference
+import androidx.preference.PreferenceFragmentCompat
+import net.vonforst.evmap.MapsActivity
+import net.vonforst.evmap.R
+
+
+class SettingsFragment : PreferenceFragmentCompat() {
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        val toolbar = view.findViewById(R.id.toolbar) as Toolbar
+
+        val navController = findNavController()
+        toolbar.setupWithNavController(
+            navController,
+            (requireActivity() as MapsActivity).appBarConfiguration
+        )
+    }
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        setPreferencesFromResource(R.xml.settings, rootKey)
+    }
+
+    override fun onPreferenceTreeClick(preference: Preference?): Boolean {
+        return when (preference?.key) {
+            else -> super.onPreferenceTreeClick(preference)
+        }
+    }
+
+}

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

@@ -0,0 +1,14 @@
+package net.vonforst.evmap.storage
+
+import android.content.Context
+import androidx.preference.PreferenceManager
+
+class PreferenceDataSource(context: Context) {
+    val sp = PreferenceManager.getDefaultSharedPreferences(context)
+
+    var navigateUseMaps: Boolean
+        get() = sp.getBoolean("navigate_use_maps", true)
+        set(value) {
+            sp.edit().putBoolean("navigate_use_maps", value).apply()
+        }
+}