maps intent: preserve zoom and show red pin

Author: savsch

app/src/main/java/fr/free/nrw/commons/Utils.java

@@ -148,13 +148,27 @@ public static void handleWebUrl(Context context, Uri url) {
     }
 
     /**
-     * Util function to handle geo coordinates
-     * It no longer depends on google maps and any app capable of handling the map intent can handle it
-     * @param context
-     * @param latLng
+     * Util function to handle geo coordinates. It no longer depends on google maps and any app
+     * capable of handling the map intent can handle it
+     *
+     * @param context The context for launching intent
+     * @param latLng  The latitude and longitude of the location
+     */
+    public static void handleGeoCoordinates(final Context context, final LatLng latLng) {
+        handleGeoCoordinates(context, latLng, 16);
+    }
+
+    /**
+     * Util function to handle geo coordinates with specified zoom level. It no longer depends on
+     * google maps and any app capable of handling the map intent can handle it
+     *
+     * @param context   The context for launching intent
+     * @param latLng    The latitude and longitude of the location
+     * @param zoomLevel The zoom level
      */
-    public static void handleGeoCoordinates(Context context, LatLng latLng) {
-        Intent mapIntent = new Intent(Intent.ACTION_VIEW, latLng.getGmmIntentUri());
+    public static void handleGeoCoordinates(final Context context, final LatLng latLng,
+        final double zoomLevel) {
+        final Intent mapIntent = new Intent(Intent.ACTION_VIEW, latLng.getGmmIntentUri(zoomLevel));
         if (mapIntent.resolveActivity(context.getPackageManager()) != null) {
             context.startActivity(mapIntent);
         } else {

app/src/main/java/fr/free/nrw/commons/explore/map/ExploreMapFragment.java

@@ -545,8 +545,9 @@ public void hideBottomDetailsSheet() {
      * @param place Place of clicked nearby marker
      */
     private void passInfoToSheet(final Place place) {
-        binding.bottomSheetDetailsBinding.directionsButton.setOnClickListener(view -> Utils.handleGeoCoordinates(getActivity(),
-            place.getLocation()));
+        binding.bottomSheetDetailsBinding.directionsButton.setOnClickListener(
+            view -> Utils.handleGeoCoordinates(getActivity(),
+                place.getLocation(), binding.mapView.getZoomLevelDouble()));
 
         binding.bottomSheetDetailsBinding.commonsButton.setVisibility(place.hasCommonsLink() ? View.VISIBLE : View.GONE);
         binding.bottomSheetDetailsBinding.commonsButton.setOnClickListener(

app/src/main/java/fr/free/nrw/commons/location/LatLng.kt

@@ -123,10 +123,13 @@ data class LatLng(
 
     /**
      * Gets a URI for a Google Maps intent at the location.
+     *
+     * @paraam zoom The zoom level
+     * @return URI for the intent
      */
-    fun getGmmIntentUri(): Uri {
-        return Uri.parse("geo:$latitude,$longitude?z=16")
-    }
+    fun getGmmIntentUri(zoom: Double): Uri = Uri.parse(
+        "geo:$latitude,$longitude?q=$latitude,$longitude&z=${zoom}"
+    )
 
     override fun writeToParcel(parcel: Parcel, flags: Int) {
         parcel.writeDouble(latitude)

app/src/main/java/fr/free/nrw/commons/locationpicker/LocationPickerActivity.kt

@@ -430,7 +430,11 @@ class LocationPickerActivity : BaseActivity(), LocationPermissionCallback {
             else -> null
         }
 
-        position?.let { Utils.handleGeoCoordinates(this, it) }
+        position?.let {
+            mapView?.zoomLevelDouble?.let { zoomLevel ->
+                Utils.handleGeoCoordinates(this, it, zoomLevel)
+            } ?: Utils.handleGeoCoordinates(this, it)
+        }
     }
 
     /**

app/src/main/java/fr/free/nrw/commons/nearby/fragments/NearbyParentFragment.java

@@ -2309,7 +2309,8 @@ public void onBottomSheetItemClick(@Nullable View view, int position) {
                 updateBookmarkButtonImage(selectedPlace);
                 break;
             case R.drawable.ic_directions_black_24dp:
-                Utils.handleGeoCoordinates(this.getContext(), selectedPlace.getLocation());
+                Utils.handleGeoCoordinates(this.getContext(), selectedPlace.getLocation(),
+                    binding.map.getZoomLevelDouble());
                 break;
             case R.drawable.ic_wikidata_logo_24dp:
                 Utils.handleWebUrl(this.getContext(), selectedPlace.siteLinks.getWikidataLink());