Merge pull request #11438 from osmandapp/route_altitude_slope

Add gradient coloring of route line

OsmAnd-java/src/main/java/net/osmand/router/RouteColorize.java

@@ -186,7 +186,7 @@ public class RouteColorize {
     public List<RouteColorizationPoint> getResult(boolean simplify) {
         List<RouteColorizationPoint> result = new ArrayList<>();
         if (simplify) {
-            result = simplify();
+            result = simplify(zoom);
         } else {
             for (int i = 0; i < latitudes.length; i++) {
                 result.add(new RouteColorizationPoint(i, latitudes[i], longitudes[i], values[i]));
@@ -200,7 +200,7 @@ public class RouteColorize {
 
     public int getColorByValue(double value) {
         if (Double.isNaN(value)) {
-            value = (minValue + maxValue) / 2;
+            value = colorizationType == ColorizationType.SLOPE ? minValue : (minValue + maxValue) / 2;
         }
         for (int i = 0; i < palette.length - 1; i++) {
             if (value == palette[i][VALUE_INDEX])
@@ -242,7 +242,7 @@ public class RouteColorize {
         return rgbaToDecimal(0, 0, 0, 0);
     }
 
-    private List<RouteColorizationPoint> simplify() {
+    public List<RouteColorizationPoint> simplify(int zoom) {
         if (dataList == null) {
             dataList = new ArrayList<>();
             for (int i = 0; i < latitudes.length; i++) {
@@ -266,6 +266,8 @@ public class RouteColorize {
             List<RouteColorizationPoint> sublist = dataList.subList(prevId, currentId);
             simplified.addAll(getExtremums(sublist));
         }
+        Node lastSurvivedPoint = result.get(result.size() - 1);
+        simplified.add(dataList.get((int) lastSurvivedPoint.getId()));
         return simplified;
     }
 

OsmAnd/res/layout/gradient_card.xml

@@ -5,8 +5,10 @@
 	android:layout_width="match_parent"
 	android:layout_height="wrap_content"
 	android:orientation="vertical"
-	android:padding="@dimen/content_padding"
 	android:paddingStart="@dimen/content_padding"
+	android:paddingLeft="@dimen/content_padding"
+	android:paddingTop="@dimen/content_padding"
+	android:paddingRight="@dimen/content_padding"
 	android:paddingEnd="@dimen/content_padding">
 
 	<View
@@ -43,4 +45,9 @@
 
 	</LinearLayout>
 
+	<View
+		android:id="@+id/space"
+		android:layout_width="match_parent"
+		android:layout_height="@dimen/content_padding" />
+
 </LinearLayout>

OsmAnd/res/values/strings.xml

@@ -12,6 +12,9 @@
 
 -->
 
+    <string name="shared_string_max_height">Max. height</string>
+    <string name="shared_string_min_height">Min. height</string>
+    <string name="route_line_use_gradient_coloring">Route line will be colorized depending on the elevation profile of the route.</string>
     <string name="output">Output</string>
     <string name="user_points">User points</string>
     <string name="announce_when_exceeded">Announce when exceeded</string>

OsmAnd/src/net/osmand/plus/helpers/GpxUiHelper.java

@@ -2125,9 +2125,12 @@ public class GpxUiHelper {
 
 
 	public static GPXFile makeGpxFromRoute(RouteCalculationResult route, OsmandApplication app) {
+		return makeGpxFromLocations(route.getRouteLocations(), app);
+	}
+
+	public static GPXFile makeGpxFromLocations(List<Location> locations, OsmandApplication app) {
 		double lastHeight = HEIGHT_UNDEFINED;
 		GPXFile gpx = new GPXUtilities.GPXFile(Version.getFullVersion(app));
-		List<Location> locations = route.getRouteLocations();
 		if (locations != null) {
 			GPXUtilities.Track track = new GPXUtilities.Track();
 			GPXUtilities.TrkSegment seg = new GPXUtilities.TrkSegment();
@@ -2147,6 +2150,8 @@ public class GpxUiHelper {
 						}
 					}
 					lastHeight = h;
+				} else {
+					lastHeight = HEIGHT_UNDEFINED;
 				}
 				seg.points.add(point);
 			}

OsmAnd/src/net/osmand/plus/routing/RouteLineDrawInfo.java

@@ -6,12 +6,14 @@ import androidx.annotation.ColorInt;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import net.osmand.plus.track.GradientScaleType;
 import net.osmand.util.Algorithms;
 
 public class RouteLineDrawInfo {
 
 	private static final String LINE_COLOR_DAY = "line_color_day";
 	private static final String LINE_COLOR_NIGHT = "line_color_night";
+	private static final String LINE_COLOR_GRADIENT = "line_color_gradient";
 	private static final String LINE_WIDTH = "line_width";
 	private static final String NAVIGATION_ICON_ID = "navigation_icon_id";
 	private static final String NAVIGATION_ICON_COLOR = "navigation_icon_color";
@@ -24,6 +26,7 @@ public class RouteLineDrawInfo {
 	@ColorInt
 	private Integer colorDay;
 	private Integer colorNight;
+	private GradientScaleType scaleType;
 	private String width;
 
 	// temporally parameters to show in preview
@@ -37,9 +40,11 @@ public class RouteLineDrawInfo {
 
 	public RouteLineDrawInfo(@Nullable @ColorInt Integer colorDay,
 	                         @Nullable @ColorInt Integer colorNight,
+							 @Nullable GradientScaleType gradientScaleType,
 	                         @Nullable String width) {
 		this.colorDay = colorDay;
 		this.colorNight = colorNight;
+		this.scaleType = gradientScaleType;
 		this.width = width;
 	}
 
@@ -50,6 +55,7 @@ public class RouteLineDrawInfo {
 	public RouteLineDrawInfo(@NonNull RouteLineDrawInfo existed) {
 		this.colorDay = existed.colorDay;
 		this.colorNight = existed.colorNight;
+		this.scaleType = existed.scaleType;
 		this.width = existed.width;
 		this.iconId = existed.iconId;
 		this.iconColor = existed.iconColor;
@@ -71,6 +77,10 @@ public class RouteLineDrawInfo {
 		this.useDefaultColor = useDefaultColor;
 	}
 
+	public void setGradientScaleType(@Nullable GradientScaleType scaleType) {
+		this.scaleType = scaleType;
+	}
+
 	public void setWidth(@Nullable String width) {
 		this.width = width;
 	}
@@ -108,6 +118,11 @@ public class RouteLineDrawInfo {
 		return nightMode ? colorNight : colorDay;
 	}
 
+	@Nullable
+	public GradientScaleType getGradientScaleType() {
+		return scaleType;
+	}
+
 	@Nullable
 	public String getWidth() {
 		return width;
@@ -141,6 +156,9 @@ public class RouteLineDrawInfo {
 		if (bundle.containsKey(LINE_COLOR_NIGHT)) {
 			colorNight = bundle.getInt(LINE_COLOR_NIGHT);
 		}
+		if (bundle.containsKey(LINE_COLOR_GRADIENT)) {
+			scaleType = GradientScaleType.getGradientTypeByName(bundle.getString(LINE_COLOR_GRADIENT));
+		}
 		width = bundle.getString(LINE_WIDTH);
 		iconId = bundle.getInt(NAVIGATION_ICON_ID);
 		iconColor = bundle.getInt(NAVIGATION_ICON_COLOR);
@@ -157,6 +175,9 @@ public class RouteLineDrawInfo {
 		if (colorNight != null) {
 			bundle.putInt(LINE_COLOR_NIGHT, colorNight);
 		}
+		if (scaleType != null) {
+			bundle.putString(LINE_COLOR_GRADIENT, scaleType.getTypeName());
+		}
 		if (width != null) {
 			bundle.putString(LINE_WIDTH, width);
 		}
@@ -177,6 +198,7 @@ public class RouteLineDrawInfo {
 
 		if (!Algorithms.objectEquals(getColor(false), that.getColor(false))) return false;
 		if (!Algorithms.objectEquals(getColor(true), that.getColor(true))) return false;
+		if (!Algorithms.objectEquals(scaleType, that.scaleType)) return false;
 		return Algorithms.objectEquals(width, that.width);
 	}
 
@@ -184,6 +206,7 @@ public class RouteLineDrawInfo {
 	public int hashCode() {
 		int result = colorDay != null ? colorDay.hashCode() : 0;
 		result = 31 * result + (colorNight != null ? colorNight.hashCode() : 0);
+		result = 31 * result + (scaleType != null ? scaleType.getTypeName().hashCode() : 0);
 		result = 31 * result + (width != null ? width.hashCode() : 0);
 		return result;
 	}

OsmAnd/src/net/osmand/plus/routing/cards/RouteLineColorCard.java

@@ -21,6 +21,7 @@ import net.osmand.AndroidUtils;
 import net.osmand.plus.R;
 import net.osmand.plus.UiUtilities;
 import net.osmand.plus.activities.MapActivity;
+import net.osmand.plus.helpers.AndroidUiHelper;
 import net.osmand.plus.helpers.ColorDialogs;
 import net.osmand.plus.helpers.enums.DayNightMode;
 import net.osmand.plus.routepreparationmenu.cards.BaseCard;
@@ -32,6 +33,8 @@ import net.osmand.plus.settings.fragments.HeaderUiAdapter;
 import net.osmand.plus.track.AppearanceViewHolder;
 import net.osmand.plus.track.ColorsCard;
 import net.osmand.plus.track.CustomColorBottomSheet.ColorPickerListener;
+import net.osmand.plus.track.GradientCard;
+import net.osmand.plus.track.GradientScaleType;
 import net.osmand.plus.widgets.multistatetoggle.RadioItem;
 import net.osmand.plus.widgets.multistatetoggle.RadioItem.OnRadioItemClickListener;
 import net.osmand.plus.widgets.multistatetoggle.TextToggleButton;
@@ -51,6 +54,7 @@ public class RouteLineColorCard extends BaseCard implements CardListener, ColorP
 	private HeaderUiAdapter headerUiAdapter;
 
 	private ColorsCard colorsCard;
+	private GradientCard gradientCard;
 	private ColorTypeAdapter colorAdapter;
 	private RecyclerView groupRecyclerView;
 	private TextView tvDescription;
@@ -64,7 +68,9 @@ public class RouteLineColorCard extends BaseCard implements CardListener, ColorP
 
 	private enum ColorMode {
 		DEFAULT(R.string.map_widget_renderer, R.drawable.ic_action_map_style),
-		CUSTOM(R.string.shared_string_custom, R.drawable.ic_action_settings);
+		CUSTOM(R.string.shared_string_custom, R.drawable.ic_action_settings),
+		ALTITUDE(R.string.altitude, R.drawable.ic_action_hillshade_dark),
+		SLOPE(R.string.shared_string_slope, R.drawable.ic_action_altitude_ascent);
 
 		ColorMode(int titleId, int iconId) {
 			this.titleId = titleId;
@@ -108,28 +114,43 @@ public class RouteLineColorCard extends BaseCard implements CardListener, ColorP
 		setupRadioGroup(radioGroup);
 
 		cardsContainer = (ViewGroup) view.findViewById(R.id.colors_card_container);
-		createColorSelector(cardsContainer);
+		createCards(cardsContainer);
 
 		initSelectedMode();
 	}
 
 	private void initSelectedMode() {
-		selectedMode = getRouteLineColor() == null ? ColorMode.DEFAULT : ColorMode.CUSTOM;
+		if (routeLineDrawInfo.getGradientScaleType() == GradientScaleType.ALTITUDE) {
+			selectedMode = ColorMode.ALTITUDE;
+		} else if (routeLineDrawInfo.getGradientScaleType() == GradientScaleType.SLOPE) {
+			selectedMode = ColorMode.SLOPE;
+		} else {
+			selectedMode = getRouteLineColor() == null ? ColorMode.DEFAULT : ColorMode.CUSTOM;
+		}
 		modeChanged();
 	}
 
 	private void modeChanged() {
 		if (selectedMode == ColorMode.DEFAULT) {
 			themeToggleContainer.setVisibility(View.GONE);
-			cardsContainer.setVisibility(View.GONE);
+			AndroidUiHelper.updateVisibility(colorsCard.getView(), false);
+			AndroidUiHelper.updateVisibility(gradientCard.getView(), false);
 			routeLineDrawInfo.setUseDefaultColor(true);
 			changeMapTheme(initMapTheme);
-		} else {
+		} else if (selectedMode == ColorMode.CUSTOM) {
 			themeToggleContainer.setVisibility(View.VISIBLE);
-			cardsContainer.setVisibility(View.VISIBLE);
+			AndroidUiHelper.updateVisibility(colorsCard.getView(), true);
+			AndroidUiHelper.updateVisibility(gradientCard.getView(), false);
 			routeLineDrawInfo.setUseDefaultColor(false);
 			changeMapTheme(isNightMap() ? DayNightMode.NIGHT : DayNightMode.DAY);
+		} else {
+			gradientCard.setSelectedScaleType(getGradientScaleTypeFromMode());
+			AndroidUiHelper.updateVisibility(colorsCard.getView(), false);
+			AndroidUiHelper.updateVisibility(gradientCard.getView(), true);
+			themeToggleContainer.setVisibility(View.GONE);
+			routeLineDrawInfo.setUseDefaultColor(false);
 		}
+		routeLineDrawInfo.setGradientScaleType(getGradientScaleTypeFromMode());
 		updateColorItems();
 		updateDescription();
 	}
@@ -170,7 +191,7 @@ public class RouteLineColorCard extends BaseCard implements CardListener, ColorP
 		}
 	}
 
-	private void createColorSelector(ViewGroup container) {
+	private void createCards(ViewGroup container) {
 		MapActivity mapActivity = getMapActivity();
 		if (mapActivity != null) {
 			List<Integer> colors = new ArrayList<>();
@@ -184,6 +205,9 @@ public class RouteLineColorCard extends BaseCard implements CardListener, ColorP
 			colorsCard = new ColorsCard(mapActivity, selectedColor, targetFragment, colors, preference, null);
 			colorsCard.setListener(this);
 			container.addView(colorsCard.build(mapActivity));
+
+			gradientCard = new GradientCard(mapActivity, routeLineDrawInfo.getGradientScaleType());
+			container.addView(gradientCard.build(mapActivity));
 		}
 	}
 
@@ -212,6 +236,17 @@ public class RouteLineColorCard extends BaseCard implements CardListener, ColorP
 		return routeLineDrawInfo.getColor(isNightMap());
 	}
 
+	@Nullable
+	private GradientScaleType getGradientScaleTypeFromMode() {
+		if (selectedMode == ColorMode.ALTITUDE) {
+			return GradientScaleType.ALTITUDE;
+		} else if (selectedMode == ColorMode.SLOPE) {
+			return GradientScaleType.SLOPE;
+		} else {
+			return null;
+		}
+	}
+
 	private void updateSelectedColor() {
 		int selectedColor = colorsCard.getSelectedColor();
 		routeLineDrawInfo.setColor(selectedColor, isNightMap());
@@ -235,6 +270,8 @@ public class RouteLineColorCard extends BaseCard implements CardListener, ColorP
 		String colorName = "";
 		if (selectedMode == ColorMode.DEFAULT) {
 			colorName = app.getString(R.string.map_widget_renderer);
+		} else if (selectedMode == ColorMode.ALTITUDE || selectedMode == ColorMode.SLOPE) {
+			colorName = app.getString(selectedMode.titleId);
 		} else if (getRouteLineColor() != null) {
 			int colorNameId = ColorDialogs.getColorName(getRouteLineColor());
 			colorName = app.getString(colorNameId);
@@ -248,10 +285,12 @@ public class RouteLineColorCard extends BaseCard implements CardListener, ColorP
 			String pattern = app.getString(R.string.route_line_use_map_style_appearance);
 			String color = app.getString(R.string.shared_string_color).toLowerCase();
 			description = String.format(pattern, color, app.getRendererRegistry().getSelectedRendererName());
-		} else {
+		} else if (selectedMode == ColorMode.CUSTOM) {
 			String pattern = app.getString(R.string.specify_color_for_map_mode);
 			String mapModeTitle = app.getString(isNightMap() ? NIGHT_TITLE_ID : DAY_TITLE_ID);
 			description = String.format(pattern, mapModeTitle.toLowerCase());
+		} else {
+			description = app.getString(R.string.route_line_use_gradient_coloring);
 		}
 		tvDescription.setText(description);
 	}

OsmAnd/src/net/osmand/plus/settings/backend/OsmandSettings.java

@@ -2708,6 +2708,7 @@ public class OsmandSettings {
 	public final ListStringPreference CUSTOM_ROUTE_LINE_COLORS = (ListStringPreference) new ListStringPreference(this, "custom_route_line_colors", null, ",").makeShared().makeGlobal();
 	public final CommonPreference<Integer> ROUTE_LINE_COLOR_DAY = new IntPreference(this, "route_line_color", 0).cache().makeProfile();
 	public final CommonPreference<Integer> ROUTE_LINE_COLOR_NIGHT = new IntPreference(this, "route_line_color_night", 0).cache().makeProfile();
+	public final CommonPreference<GradientScaleType> ROUTE_LINE_GRADIENT = new EnumStringPreference<>(this, "route_line_gradient", null, new GradientScaleType[] {GradientScaleType.ALTITUDE, GradientScaleType.SLOPE}).cache().makeProfile();
 	public final CommonPreference<String> ROUTE_LINE_WIDTH = new StringPreference(this, "route_line_width", null).makeProfile();
 
 	public final OsmandPreference<Boolean> USE_OSM_LIVE_FOR_ROUTING = new BooleanPreference(this, "enable_osmc_routing", true).makeProfile();

OsmAnd/src/net/osmand/plus/settings/fragments/ProfileAppearanceFragment.java

@@ -63,6 +63,7 @@ import net.osmand.plus.settings.backend.backup.SettingsHelper;
 import net.osmand.plus.settings.fragments.RouteLineAppearanceFragment.OnApplyRouteLineListener;
 import net.osmand.plus.track.ColorsCard;
 import net.osmand.plus.track.CustomColorBottomSheet.ColorPickerListener;
+import net.osmand.plus.track.GradientScaleType;
 import net.osmand.plus.widgets.FlowLayout;
 import net.osmand.plus.widgets.OsmandTextFieldBoxes;
 import net.osmand.util.Algorithms;
@@ -1021,8 +1022,9 @@ public class ProfileAppearanceFragment extends BaseSettingsFragment implements O
 	private RouteLineDrawInfo createRouteLineDrawInfo(@NonNull ApplicationMode appMode) {
 		Integer colorDay = getRouteLineColor(appMode, settings.ROUTE_LINE_COLOR_DAY);
 		Integer colorNight = getRouteLineColor(appMode, settings.ROUTE_LINE_COLOR_NIGHT);
+		GradientScaleType scaleType = settings.ROUTE_LINE_GRADIENT.getModeValue(appMode);
 		String widthKey = settings.ROUTE_LINE_WIDTH.getModeValue(appMode);
-		return new RouteLineDrawInfo(colorDay, colorNight, widthKey);
+		return new RouteLineDrawInfo(colorDay, colorNight, scaleType, widthKey);
 	}
 
 	private Integer getRouteLineColor(@NonNull ApplicationMode appMode,
@@ -1035,6 +1037,7 @@ public class ProfileAppearanceFragment extends BaseSettingsFragment implements O
 	                                     @NonNull RouteLineDrawInfo drawInfo) {
 		saveRouteLineColor(appMode, settings.ROUTE_LINE_COLOR_DAY, drawInfo.getColor(false));
 		saveRouteLineColor(appMode, settings.ROUTE_LINE_COLOR_NIGHT, drawInfo.getColor(true));
+		settings.ROUTE_LINE_GRADIENT.setModeValue(appMode, drawInfo.getGradientScaleType());
 		settings.ROUTE_LINE_WIDTH.setModeValue(appMode, drawInfo.getWidth());
 	}
 

OsmAnd/src/net/osmand/plus/track/GradientCard.java

@@ -19,15 +19,24 @@ import androidx.annotation.Nullable;
 
 public class GradientCard extends BaseCard {
 
-	private GPXTrackAnalysis gpxTrackAnalysis;
+	private final GPXTrackAnalysis gpxTrackAnalysis;
 	private GradientScaleType selectedScaleType;
 
+	private final int minSlope = 0;
+	private final int maxSlope = 60;
+
 	public GradientCard(@NonNull MapActivity mapActivity, @NonNull GPXTrackAnalysis gpxTrackAnalysis, @Nullable GradientScaleType selectedScaleType) {
 		super(mapActivity);
 		this.gpxTrackAnalysis = gpxTrackAnalysis;
 		this.selectedScaleType = selectedScaleType;
 	}
 
+	public GradientCard(@NonNull MapActivity mapActivity, @Nullable GradientScaleType scaleType) {
+		super(mapActivity);
+		this.gpxTrackAnalysis = null;
+		this.selectedScaleType = scaleType;
+	}
+
 	@Override
 	public int getCardLayoutId() {
 		return R.layout.gradient_card;
@@ -40,14 +49,27 @@ public class GradientCard extends BaseCard {
 			return;
 		}
 
-		AndroidUiHelper.updateVisibility(view, true);
 		TextView minValue = view.findViewById(R.id.min_value);
 		TextView maxValue = view.findViewById(R.id.max_value);
-		double min = RouteColorize.getMinValue(selectedScaleType.toColorizationType(), gpxTrackAnalysis);
+
-		double max = RouteColorize.getMaxValue(selectedScaleType.toColorizationType(),
+		if (gpxTrackAnalysis != null) {
-				gpxTrackAnalysis, min, app.getSettings().getApplicationMode().getMaxSpeed());
+			AndroidUiHelper.updateVisibility(view, true);
-		minValue.setText(formatValue(min));
+			double min = RouteColorize.getMinValue(selectedScaleType.toColorizationType(), gpxTrackAnalysis);
-		maxValue.setText(formatValue(max));
+			double max = RouteColorize.getMaxValue(selectedScaleType.toColorizationType(),
+					gpxTrackAnalysis, min, app.getSettings().getApplicationMode().getMaxSpeed());
+			minValue.setText(formatValue(min));
+			maxValue.setText(formatValue(max));
+			AndroidUiHelper.updateVisibility(view.findViewById(R.id.space), true);
+		} else {
+			if (selectedScaleType == GradientScaleType.ALTITUDE) {
+				minValue.setText(R.string.shared_string_min_height);
+				maxValue.setText(R.string.shared_string_max_height);
+			} else if (selectedScaleType == GradientScaleType.SLOPE) {
+				minValue.setText(formatValue(minSlope));
+				maxValue.setText(formatValue(maxSlope));
+			}
+			AndroidUiHelper.updateVisibility(view.findViewById(R.id.space), false);
+		}
 	}
 
 	public void setSelectedScaleType(GradientScaleType type) {
@@ -59,7 +81,7 @@ public class GradientCard extends BaseCard {
 		if (selectedScaleType == GradientScaleType.ALTITUDE) {
 			return OsmAndFormatter.getFormattedAlt(value, app);
 		} else if (selectedScaleType == GradientScaleType.SLOPE) {
-			return (int) value + " %";
+			return app.getString(R.string.ltr_or_rtl_combine_via_space, String.valueOf((int) value),  "%");
 		}
 		String speed = OsmAndFormatter.getFormattedSpeed((float) value, app);
 		String speedUnit = app.getSettings().SPEED_SYSTEM.get().toShortString(app);

OsmAnd/src/net/osmand/plus/views/layers/RouteLayer.java

@@ -4,6 +4,7 @@ import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Canvas;
 import android.graphics.Color;
+import android.graphics.LinearGradient;
 import android.graphics.Matrix;
 import android.graphics.Paint;
 import android.graphics.Paint.Cap;
@@ -11,6 +12,7 @@ import android.graphics.Path;
 import android.graphics.PointF;
 import android.graphics.PorterDuff.Mode;
 import android.graphics.PorterDuffColorFilter;
+import android.graphics.Shader;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.LayerDrawable;
 
@@ -44,6 +46,7 @@ import net.osmand.plus.routing.RouteService;
 import net.osmand.plus.routing.RoutingHelper;
 import net.osmand.plus.routing.TransportRoutingHelper;
 import net.osmand.plus.settings.backend.CommonPreference;
+import net.osmand.plus.track.GradientScaleType;
 import net.osmand.plus.views.OsmandMapLayer;
 import net.osmand.plus.views.OsmandMapTileView;
 import net.osmand.plus.views.layers.ContextMenuLayer.IContextMenuProvider;
@@ -54,6 +57,7 @@ import net.osmand.plus.views.layers.geometry.RouteGeometryWayContext;
 import net.osmand.render.RenderingRuleProperty;
 import net.osmand.render.RenderingRuleSearchRequest;
 import net.osmand.render.RenderingRulesStorage;
+import net.osmand.router.RouteColorize;
 import net.osmand.router.TransportRouteResult;
 import net.osmand.util.Algorithms;
 import net.osmand.util.MapUtils;
@@ -109,6 +113,7 @@ public class RouteLayer extends OsmandMapLayer implements IContextMenuProvider {
 
 	private int routeLineColor;
 	private Integer directionArrowsColor;
+	private GradientScaleType gradientScaleType = null;
 
 	public RouteLayer(RoutingHelper helper) {
 		this.helper = helper;
@@ -136,6 +141,8 @@ public class RouteLayer extends OsmandMapLayer implements IContextMenuProvider {
 		attrs.defaultWidth = (int) (12 * density);
 		attrs.defaultWidth3 = (int) (7 * density);
 		attrs.defaultColor = view.getResources().getColor(R.color.nav_track);
+		attrs.shadowPaint.setColor(0x80000000);
+		attrs.shadowPaint.setStrokeCap(Cap.ROUND);
 		attrs.paint3.setStrokeCap(Cap.BUTT);
 		attrs.paint3.setColor(Color.WHITE);
 		attrs.paint2.setStrokeCap(Cap.BUTT);
@@ -331,14 +338,24 @@ public class RouteLayer extends OsmandMapLayer implements IContextMenuProvider {
 	                                  DrawSettings settings,
 	                                  RouteLineDrawInfo drawInfo) {
 		updateAttrs(settings, tileBox);
-		updateRouteColors(nightMode);
-		paintRouteLinePreview.setColor(getRouteLineColor());
 		paintRouteLinePreview.setStrokeWidth(getRouteLineWidth(tileBox));
 
 		int centerX = drawInfo.getCenterX();
 		int centerY = drawInfo.getCenterY();
 		int screenHeight = drawInfo.getScreenHeight();
 
+		updateRouteColors(nightMode);
+		updateRouteGradient();
+
+		LinearGradient gradient = null;
+		if (gradientScaleType == GradientScaleType.ALTITUDE || gradientScaleType == GradientScaleType.SLOPE) {
+			int[] colors = new int[] {RouteColorize.RED, RouteColorize.YELLOW, RouteColorize.GREEN};
+			float[] positions = new float[] {0, 0.5f, 1};
+			gradient = new LinearGradient(centerX, 0, centerX, screenHeight, colors, positions, Shader.TileMode.CLAMP);
+		}
+		paintRouteLinePreview.setShader(gradient);
+		paintRouteLinePreview.setColor(getRouteLineColor());
+
 		canvas.drawLine(centerX, 0, centerX, screenHeight, paintRouteLinePreview);
 
 		if (previewIcon == null) {
@@ -460,6 +477,14 @@ public class RouteLayer extends OsmandMapLayer implements IContextMenuProvider {
 		routeLineColor = color;
 	}
 
+	private void updateRouteGradient() {
+		if (routeLineDrawInfo != null) {
+			gradientScaleType = routeLineDrawInfo.getGradientScaleType();
+		} else {
+			gradientScaleType = view.getSettings().ROUTE_LINE_GRADIENT.getModeValue(helper.getAppMode());
+		}
+	}
+
 	private float getRouteLineWidth(@NonNull RotatedTileBox tileBox) {
 		String widthKey;
 		if (routeLineDrawInfo != null) {
@@ -524,9 +549,10 @@ public class RouteLayer extends OsmandMapLayer implements IContextMenuProvider {
 			boolean directTo = route.getRouteService() == RouteService.DIRECT_TO;
 			boolean straight = route.getRouteService() == RouteService.STRAIGHT;
 			publicTransportRouteGeometry.clearRoute();
-			routeGeometry.updateRoute(tb, route);
 			updateRouteColors(nightMode);
-			routeGeometry.setRouteStyleParams(getRouteLineColor(), getRouteLineWidth(tb), getDirectionArrowsColor());
+			updateRouteGradient();
+			routeGeometry.setRouteStyleParams(getRouteLineColor(), getRouteLineWidth(tb), getDirectionArrowsColor(), gradientScaleType);
+			routeGeometry.updateRoute(tb, route, view.getApplication());
 			if (directTo) {
 				routeGeometry.drawSegments(tb, canvas, topLatitude, leftLongitude, bottomLatitude, rightLongitude,
 						null, 0);

OsmAnd/src/net/osmand/plus/views/layers/geometry/GeometryWay.java

@@ -126,7 +126,7 @@ public abstract class GeometryWay<T extends GeometryWayContext, D extends Geomet
 		zooms.clear();
 	}
 
-	private PathGeometryZoom getGeometryZoom(RotatedTileBox tb) {
+	protected PathGeometryZoom getGeometryZoom(RotatedTileBox tb, Map<Integer, PathGeometryZoom> zooms) {
 		int zoom = tb.getZoom();
 		PathGeometryZoom zm = zooms.size() > zoom ? zooms.get(zoom) : null;
 		if (zm == null) {
@@ -139,6 +139,11 @@ public abstract class GeometryWay<T extends GeometryWayContext, D extends Geomet
 	@NonNull
 	public abstract GeometryWayStyle<?> getDefaultWayStyle();
 
+	@NonNull
+	protected Map<Integer, GeometryWayStyle<?>> getStyleMap() {
+		return styleMap;
+	}
+
 	public Location getNextVisiblePoint() {
 		return null;
 	}
@@ -148,7 +153,7 @@ public abstract class GeometryWay<T extends GeometryWayContext, D extends Geomet
 		if (locationProvider == null || locationProvider.getSize() == 0) {
 			return;
 		}
-		PathGeometryZoom geometryZoom = getGeometryZoom(tb);
+		PathGeometryZoom geometryZoom = getGeometryZoom(tb, zooms);
 		TByteArrayList simplification = geometryZoom.getSimplifyPoints();
 		List<Double> odistances = geometryZoom.getDistances();
 
@@ -168,32 +173,27 @@ public abstract class GeometryWay<T extends GeometryWayContext, D extends Geomet
 		int previous = -1;
 		for (int i = startLocationIndex; i < locationProvider.getSize(); i++) {
 			style = getStyle(i, defaultWayStyle);
-			if (simplification.getQuick(i) == 0 && !styleMap.containsKey(i)) {
+			if (shouldSkipLocation(simplification, styleMap, i)) {
 				continue;
 			}
-			double lat = locationProvider.getLatitude(i);
-			double lon = locationProvider.getLongitude(i);
 			if (shouldAddLocation(simplification, leftLongitude, rightLongitude, bottomLatitude, topLatitude,
 					locationProvider, i)) {
 				double dist = previous == -1 ? 0 : odistances.get(i);
 				if (!previousVisible) {
-					double prevLat = Double.NaN;
-					double prevLon = Double.NaN;
 					if (previous != -1) {
-						prevLat = locationProvider.getLatitude(previous);
+						addLocation(tb, previous, style, tx, ty, angles, distances, dist, styles);
-						prevLon = locationProvider.getLongitude(previous);
 					} else if (lastProjection != null) {
-						prevLat = lastProjection.getLatitude();
+						double prevLat = lastProjection.getLatitude();
-						prevLon = lastProjection.getLongitude();
+						double prevLon = lastProjection.getLongitude();
-					}
+						if (!Double.isNaN(prevLat) && !Double.isNaN(prevLon)) {
-					if (!Double.isNaN(prevLat) && !Double.isNaN(prevLon)) {
+							addLocation(tb, prevLat, prevLon, getStyle(i - 1, style), tx, ty, angles, distances, dist, styles); // first point
-						addLocation(tb, prevLat, prevLon, getStyle(i - 1, style), tx, ty, angles, distances, dist, styles); // first point
+						}
 					}
 				}
-				addLocation(tb, lat, lon, style, tx, ty, angles, distances, dist, styles);
+				addLocation(tb, i, style, tx, ty, angles, distances, dist, styles);
 				previousVisible = true;
 			} else if (previousVisible) {
-				addLocation(tb, lat, lon, style, tx, ty, angles, distances, previous == -1 ? 0 : odistances.get(i), styles);
+				addLocation(tb, i, style, tx, ty, angles, distances, previous == -1 ? 0 : odistances.get(i), styles);
 				double distToFinish = 0;
 				for (int ki = i + 1; ki < odistances.size(); ki++) {
 					distToFinish += odistances.get(ki);
@@ -207,6 +207,10 @@ public abstract class GeometryWay<T extends GeometryWayContext, D extends Geomet
 		drawRouteSegment(tb, canvas, tx, ty, angles, distances, 0, styles);
 	}
 
+	protected boolean shouldSkipLocation(TByteArrayList simplification, Map<Integer, GeometryWayStyle<?>> styleMap, int locationIdx) {
+		return simplification.getQuick(locationIdx) == 0 && !styleMap.containsKey(locationIdx);
+	}
+
 	protected boolean shouldAddLocation(TByteArrayList simplification, double leftLon, double rightLon, double bottomLat,
 										double topLat, GeometryWayProvider provider, int currLocationIdx) {
 		double lat = provider.getLatitude(currLocationIdx);
@@ -214,7 +218,14 @@ public abstract class GeometryWay<T extends GeometryWayContext, D extends Geomet
 		return leftLon <= lon && lon <= rightLon && bottomLat <= lat && lat <= topLat;
 	}
 
-	private void addLocation(RotatedTileBox tb, double latitude, double longitude, GeometryWayStyle<?> style,
+	protected void addLocation(RotatedTileBox tb, int locationIdx, GeometryWayStyle<?> style,
+							   List<Float> tx, List<Float> ty, List<Double> angles, List<Double> distances,
+							   double dist, List<GeometryWayStyle<?>> styles) {
+		addLocation(tb, locationProvider.getLatitude(locationIdx), locationProvider.getLongitude(locationIdx),
+				style, tx, ty, angles, distances, dist, styles);
+	}
+
+	protected void addLocation(RotatedTileBox tb, double latitude, double longitude, GeometryWayStyle<?> style,
 							 List<Float> tx, List<Float> ty, List<Double> angles, List<Double> distances,
 							 double dist, List<GeometryWayStyle<?>> styles) {
 		float x = tb.getPixXFromLatLon(latitude, longitude);
@@ -356,13 +367,26 @@ public abstract class GeometryWay<T extends GeometryWayContext, D extends Geomet
 				List<Pair<Path, GeometryWayStyle<?>>> paths = new ArrayList<>();
 				canvas.rotate(-tb.getRotate(), tb.getCenterPixelX(), tb.getCenterPixelY());
 				calculatePath(tb, tx, ty, styles, paths);
-				for (Pair<Path, GeometryWayStyle<?>> pc : paths) {
+
+				drawer.drawFullBorder(canvas, tb.getZoom(), paths);
+				drawer.drawSegmentBorder(canvas, tb.getZoom(), paths.get(0).first, paths.get(0).second);
+				for (int i = 1; i <= paths.size(); i++) {
+					if (i != paths.size()) {
+						Pair<Path, GeometryWayStyle<?>> prev = paths.get(i);
+						if (prev.second.hasPathLine()) {
+							drawer.drawSegmentBorder(canvas, tb.getZoom(), prev.first, prev.second);
+						}
+					}
+
+					Pair<Path, GeometryWayStyle<?>> pc = paths.get(i - 1);
 					GeometryWayStyle<?> style = pc.second;
 					if (style.hasPathLine()) {
 						drawer.drawPath(canvas, pc.first, style);
 					}
 				}
 				context.clearCustomColor();
+				context.clearCustomShader();
+
 			}
 			drawer.drawArrowsOverPath(canvas, tb, tx, ty, angles, distances, distToFinish, styles);
 		} finally {
@@ -372,7 +396,7 @@ public abstract class GeometryWay<T extends GeometryWayContext, D extends Geomet
 		}
 	}
 
-	private static class PathGeometryZoom {
+	protected static class PathGeometryZoom {
 
 		private static final float EPSILON_IN_DPI = 2;
 
@@ -390,12 +414,7 @@ public abstract class GeometryWay<T extends GeometryWayContext, D extends Geomet
 			angles = new ArrayList<>(size);
 			if (simplify) {
 				simplifyPoints.fill(0, size, (byte) 0);
-				if (size > 0) {
+				simplify(tb, locationProvider, simplifyPoints);
-					simplifyPoints.set(0, (byte) 1);
-				}
-				double distInPix = (tb.getDistance(0, 0, tb.getPixWidth(), 0) / tb.getPixWidth());
-				double cullDistance = (distInPix * (EPSILON_IN_DPI * Math.max(1, tb.getDensity())));
-				cullRamerDouglasPeucker(simplifyPoints, locationProvider, 0, size - 1, cullDistance);
 			} else {
 				simplifyPoints.fill(0, size, (byte) 1);
 			}
@@ -422,6 +441,16 @@ public abstract class GeometryWay<T extends GeometryWayContext, D extends Geomet
 			}
 		}
 
+		protected void simplify(RotatedTileBox tb, GeometryWayProvider locationProvider, TByteArrayList simplifyPoints) {
+			int size = locationProvider.getSize();
+			if (size > 0) {
+				simplifyPoints.set(0, (byte) 1);
+			}
+			double distInPix = (tb.getDistance(0, 0, tb.getPixWidth(), 0) / tb.getPixWidth());
+			double cullDistance = (distInPix * (EPSILON_IN_DPI * Math.max(1, tb.getDensity())));
+			cullRamerDouglasPeucker(simplifyPoints, locationProvider, 0, size - 1, cullDistance);
+		}
+
 		public List<Double> getDistances() {
 			return distances;
 		}

OsmAnd/src/net/osmand/plus/views/layers/geometry/GeometryWayContext.java

@@ -105,6 +105,10 @@ public abstract class GeometryWayContext {
 		attrs.customColor = 0;
 	}
 
+	public void clearCustomShader() {
+		attrs.customColorPaint.setShader(null);
+	}
+
 	public int getStrokeColor(int sourceColor) {
 		return ColorUtils.blendARGB(sourceColor, Color.BLACK, 0.6f);
 	}

OsmAnd/src/net/osmand/plus/views/layers/geometry/GeometryWayDrawer.java

@@ -7,6 +7,7 @@ import android.graphics.Paint;
 import android.graphics.Path;
 import android.graphics.PorterDuff;
 import android.graphics.PorterDuffColorFilter;
+import android.util.Pair;
 
 import net.osmand.data.RotatedTileBox;
 
@@ -89,6 +90,12 @@ public class GeometryWayDrawer<T extends GeometryWayContext> {
 		}
 	}
 
+	protected void drawFullBorder(Canvas canvas, int zoom, List<Pair<Path, GeometryWayStyle<?>>> paths) {
+	}
+
+	protected void drawSegmentBorder(Canvas canvas, int zoom, Path path, GeometryWayStyle<?> style) {
+	}
+
 	protected PathPoint getArrowPathPoint(float iconx, float icony, GeometryWayStyle<?> style, double angle) {
 		return new PathPoint(iconx, icony, angle, style);
 	}

OsmAnd/src/net/osmand/plus/views/layers/geometry/RouteGeometryWay.java

@@ -2,20 +2,32 @@ package net.osmand.plus.views.layers.geometry;
 
 import android.graphics.Bitmap;
 import android.graphics.Paint;
+import android.graphics.PointF;
+
+import net.osmand.GPXUtilities;
+import net.osmand.GPXUtilities.GPXFile;
+import net.osmand.Location;
+import net.osmand.data.RotatedTileBox;
+import net.osmand.plus.OsmandApplication;
+import net.osmand.plus.helpers.GpxUiHelper;
+import net.osmand.plus.routing.RouteCalculationResult;
+import net.osmand.plus.routing.RoutingHelper;
+import net.osmand.plus.track.GradientScaleType;
+import net.osmand.router.RouteColorize;
+import net.osmand.router.RouteColorize.RouteColorizationPoint;
+import net.osmand.util.Algorithms;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
 
 import androidx.annotation.ColorInt;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import gnu.trove.list.array.TByteArrayList;
 
-import net.osmand.Location;
+public class RouteGeometryWay extends GeometryWay<RouteGeometryWayContext, RouteGeometryWayDrawer> {
-import net.osmand.data.RotatedTileBox;
-import net.osmand.plus.routing.RouteCalculationResult;
-import net.osmand.plus.routing.RoutingHelper;
-
-import java.util.Collections;
-import java.util.List;
-
-public class RouteGeometryWay extends GeometryWay<RouteGeometryWayContext, GeometryWayDrawer<RouteGeometryWayContext>> {
 
 	private RoutingHelper helper;
 	private RouteCalculationResult route;
@@ -23,34 +35,101 @@ public class RouteGeometryWay extends GeometryWay<RouteGeometryWayContext, Geome
 	private Integer customColor;
 	private Float customWidth;
 	private Integer customPointColor;
+	private GradientScaleType scaleType;
+	private GradientScaleType prevScaleType;
 
 	public RouteGeometryWay(RouteGeometryWayContext context) {
-		super(context, new GeometryWayDrawer<>(context));
+		super(context, new RouteGeometryWayDrawer(context, true));
 		this.helper = context.getApp().getRoutingHelper();
 	}
 
 	public void setRouteStyleParams(@Nullable @ColorInt Integer color,
 	                                @Nullable Float width,
-	                                @Nullable @ColorInt Integer pointColor) {
+	                                @Nullable @ColorInt Integer pointColor,
+									@Nullable GradientScaleType scaleType) {
+		if (scaleType != null && !Algorithms.objectEquals(customWidth, width)) {
+			for (GeometryWayStyle<?> style : getStyleMap().values()) {
+				style.width = width;
+			}
+		}
 		this.customColor = color;
 		this.customWidth = width;
 		this.customPointColor = pointColor;
+		this.prevScaleType = this.scaleType;
+		this.scaleType = scaleType;
+		if (width != null) {
+			getContext().getAttrs().shadowPaint.setStrokeWidth(width + getContext().getDensity() * 2);
+		}
+		getContext().getAttrs().customColorPaint.setStrokeCap(scaleType != null ? Paint.Cap.ROUND : Paint.Cap.BUTT);
 	}
 
-	@NonNull
+	public void updateRoute(RotatedTileBox tb, RouteCalculationResult route, OsmandApplication app) {
-	@Override
+		if (tb.getMapDensity() != getMapDensity() || this.route != route || prevScaleType != scaleType) {
-	public GeometryWayStyle<RouteGeometryWayContext> getDefaultWayStyle() {
-		Paint paint = getContext().getAttrs().paint;
-		int color = customColor != null ? customColor : paint.getColor();
-		float width = customWidth != null ? customWidth : paint.getStrokeWidth();
-		return new GeometrySolidWayStyle(getContext(), color, width, customPointColor);
-	}
-
-	public void updateRoute(RotatedTileBox tb, RouteCalculationResult route) {
-		if (tb.getMapDensity() != getMapDensity() || this.route != route) {
 			this.route = route;
 			List<Location> locations = route != null ? route.getImmutableAllLocations() : Collections.<Location>emptyList();
-			updateWay(locations, tb);
+
+			if (scaleType == null || locations.size() < 2) {
+				updateWay(locations, tb);
+				return;
+			}
+			GPXFile gpxFile = GpxUiHelper.makeGpxFromLocations(locations, app);
+			if (!gpxFile.hasAltitude) {
+				updateWay(locations, tb);
+				return;
+			}
+
+			// Start point can have wrong zero altitude
+			List<GPXUtilities.WptPt> pts = gpxFile.tracks.get(0).segments.get(0).points;
+			GPXUtilities.WptPt firstPt = pts.get(0);
+			if (firstPt.ele == 0) {
+				firstPt.ele = pts.get(1).ele;
+			}
+
+			RouteColorize routeColorize = new RouteColorize(tb.getZoom(), gpxFile, null, scaleType.toColorizationType(), 0);
+			List<RouteColorizationPoint> points = routeColorize.getResult(false);
+
+			updateWay(new GradientGeometryWayProvider(routeColorize, points), createStyles(points), tb);
+		}
+	}
+
+	private Map<Integer, GeometryWayStyle<?>> createStyles(List<RouteColorizationPoint> points) {
+		Map<Integer, GeometryWayStyle<?>> styleMap = new TreeMap<>();
+		for (int i = 1; i < points.size(); i++) {
+			GeometryGradientWayStyle style = getGradientWayStyle();
+			style.startColor = points.get(i - 1).color;
+			style.endColor = points.get(i).color;
+			styleMap.put(i, style);
+		}
+		return styleMap;
+	}
+
+	@Override
+	protected boolean shouldSkipLocation(TByteArrayList simplification, Map<Integer, GeometryWayStyle<?>> styleMap, int locationIdx) {
+		return scaleType == null ?
+				super.shouldSkipLocation(simplification, styleMap, locationIdx) :
+				simplification.getQuick(locationIdx) == 0;
+	}
+
+	@Override
+	protected void addLocation(RotatedTileBox tb, int locationIdx, GeometryWayStyle<?> style, List<Float> tx, List<Float> ty, List<Double> angles, List<Double> distances, double dist, List<GeometryWayStyle<?>> styles) {
+		super.addLocation(tb, getLocationProvider().getLatitude(locationIdx),
+				getLocationProvider().getLongitude(locationIdx), style, tx, ty, angles, distances, dist, styles);
+		if (scaleType != null && tx.size() - 1 > 0) {
+			int idx = tx.size() - 1;
+			((GeometryGradientWayStyle) style).startXY = new PointF(tx.get(idx - 1), ty.get(idx - 1));
+			((GeometryGradientWayStyle) style).endXY = new PointF(tx.get(idx), ty.get(idx));
+ 		}
+	}
+
+	@Override
+	protected void addLocation(RotatedTileBox tb, double latitude, double longitude, GeometryWayStyle<?> style, List<Float> tx, List<Float> ty, List<Double> angles, List<Double> distances, double dist, List<GeometryWayStyle<?>> styles) {
+		super.addLocation(tb, latitude, longitude, style, tx, ty, angles, distances, dist, styles);
+		if (scaleType != null) {
+			int lastIdx = tx.size() - 1;
+			((GeometryGradientWayStyle) style).startXY = new PointF(tx.get(lastIdx), ty.get(lastIdx));
+			((GeometryGradientWayStyle) style).endXY = new PointF(tx.get(lastIdx), ty.get(lastIdx));
+			((GeometryGradientWayStyle) style).startColor = getGradientLocationProvider().getColor(0);
+			((GeometryGradientWayStyle) style).endColor = getGradientLocationProvider().getColor(0);
 		}
 	}
 
@@ -61,17 +140,125 @@ public class RouteGeometryWay extends GeometryWay<RouteGeometryWayContext, Geome
 		}
 	}
 
+	@NonNull
+	@Override
+	public GeometryWayStyle<RouteGeometryWayContext> getDefaultWayStyle() {
+		Paint paint = getContext().getAttrs().paint;
+		int color = customColor != null ? customColor : paint.getColor();
+		float width = customWidth != null ? customWidth : paint.getStrokeWidth();
+		return scaleType == null ?
+				new GeometrySolidWayStyle(getContext(), color, width, customPointColor) :
+				new GeometryGradientWayStyle(getContext(), color, width);
+	}
+
+	private GeometryGradientWayStyle getGradientWayStyle() {
+		return (GeometryGradientWayStyle) getDefaultWayStyle();
+	}
+
 	@Override
 	public Location getNextVisiblePoint() {
 		return helper.getRoute().getCurrentStraightAnglePoint();
 	}
 
+	private GradientGeometryWayProvider getGradientLocationProvider() {
+		return (GradientGeometryWayProvider) getLocationProvider();
+	}
+
+	@Override
+	protected PathGeometryZoom getGeometryZoom(RotatedTileBox tb, Map<Integer, PathGeometryZoom> zooms) {
+		if (scaleType == null) {
+			return super.getGeometryZoom(tb, zooms);
+		}
+		int zoom = tb.getZoom();
+		PathGeometryZoom zm = zooms.get(zoom);
+		if (zm == null) {
+			zm = new GradientPathGeometryZoom(getLocationProvider(), tb, true);
+			zooms.put(zoom, zm);
+		}
+		return zm;
+	}
+
+	private static class GradientGeometryWayProvider implements GeometryWayProvider {
+
+		private final RouteColorize routeColorize;
+		private final List<RouteColorizationPoint> locations;
+
+		public GradientGeometryWayProvider(RouteColorize routeColorize, List<RouteColorizationPoint> locations) {
+			this.routeColorize = routeColorize;
+			this.locations = locations;
+		}
+
+		public List<RouteColorizationPoint> simplify(int zoom) {
+			return routeColorize.simplify(zoom);
+		}
+
+		public int getColor(int index) {
+			return locations.get(index).color;
+		}
+
+		@Override
+		public double getLatitude(int index) {
+			return locations.get(index).lat;
+		}
+
+		@Override
+		public double getLongitude(int index) {
+			return locations.get(index).lon;
+		}
+
+		@Override
+		public int getSize() {
+			return locations.size();
+		}
+	}
+
+	private static class GradientPathGeometryZoom extends PathGeometryZoom {
+
+		public GradientPathGeometryZoom(GeometryWayProvider locationProvider, RotatedTileBox tb, boolean simplify) {
+			super(locationProvider, tb, simplify);
+		}
+
+		@Override
+		protected void simplify(RotatedTileBox tb, GeometryWayProvider locationProvider, TByteArrayList simplifyPoints) {
+			if (locationProvider instanceof GradientGeometryWayProvider) {
+				GradientGeometryWayProvider provider = (GradientGeometryWayProvider) locationProvider;
+				List<RouteColorizationPoint> simplified = provider.simplify(tb.getZoom());
+				for (RouteColorizationPoint location : simplified) {
+					simplifyPoints.set(location.id, (byte) 1);
+				}
+			}
+		}
+	}
+
+	public static class GeometryGradientWayStyle extends GeometryWayStyle<RouteGeometryWayContext> {
+
+		public int startColor;
+		public int endColor;
+
+		public PointF startXY;
+		public PointF endXY;
+
+		public GeometryGradientWayStyle(RouteGeometryWayContext context, Integer color, Float width) {
+			super(context, color, width);
+		}
+
+		@Override
+		public Bitmap getPointBitmap() {
+			return getContext().getArrowBitmap();
+		}
+
+		@Override
+		public boolean equals(Object other) {
+			return this == other;
+		}
+	}
+
 	private static class GeometrySolidWayStyle extends GeometryWayStyle<RouteGeometryWayContext> {
 
 		private Integer pointColor;
 
 		GeometrySolidWayStyle(RouteGeometryWayContext context, Integer color, Float width,
-		                      Integer pointColor) {
+							  Integer pointColor) {
 			super(context, color, width);
 			this.pointColor = pointColor;
 		}

OsmAnd/src/net/osmand/plus/views/layers/geometry/RouteGeometryWayDrawer.java

@@ -0,0 +1,57 @@
+package net.osmand.plus.views.layers.geometry;
+
+import android.graphics.Canvas;
+import android.graphics.LinearGradient;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.Shader;
+import android.util.Pair;
+
+import net.osmand.plus.views.MapTileLayer;
+import net.osmand.plus.views.layers.geometry.RouteGeometryWay.GeometryGradientWayStyle;
+
+import java.util.List;
+
+public class RouteGeometryWayDrawer extends GeometryWayDrawer<RouteGeometryWayContext> {
+
+	private static final int BORDER_TYPE_ZOOM_THRESHOLD = MapTileLayer.DEFAULT_MAX_ZOOM + MapTileLayer.OVERZOOM_IN;
+
+	private final boolean drawBorder;
+
+	public RouteGeometryWayDrawer(RouteGeometryWayContext context, boolean drawBorder) {
+		super(context);
+		this.drawBorder = drawBorder;
+	}
+
+	@Override
+	protected void drawFullBorder(Canvas canvas, int zoom, List<Pair<Path, GeometryWayStyle<?>>> paths) {
+		if (drawBorder && zoom < BORDER_TYPE_ZOOM_THRESHOLD) {
+			Paint borderPaint = getContext().getAttrs().shadowPaint;
+			Path fullPath = new Path();
+			for (Pair<Path, GeometryWayStyle<?>> path : paths) {
+				if (path.second instanceof GeometryGradientWayStyle) {
+					fullPath.addPath(path.first);
+				}
+			}
+			canvas.drawPath(fullPath, borderPaint);
+		}
+	}
+
+	@Override
+	public void drawPath(Canvas canvas, Path path, GeometryWayStyle<?> s) {
+		if (s instanceof GeometryGradientWayStyle) {
+			GeometryGradientWayStyle style = (GeometryGradientWayStyle) s;
+			LinearGradient gradient = new LinearGradient(style.startXY.x, style.startXY.y, style.endXY.x, style.endXY.y,
+					style.startColor, style.endColor, Shader.TileMode.CLAMP);
+			getContext().getAttrs().customColorPaint.setShader(gradient);
+		}
+		super.drawPath(canvas, path, s);
+	}
+
+	@Override
+	protected void drawSegmentBorder(Canvas canvas, int zoom, Path path, GeometryWayStyle<?> style) {
+		if (drawBorder && zoom >= BORDER_TYPE_ZOOM_THRESHOLD) {
+			canvas.drawPath(path, getContext().getAttrs().shadowPaint);
+		}
+	}
+}