Merge pull request #8831 from osmandapp/custom_downloads_improvements

Custom downloads improvements first part

OsmAnd-java/src/main/java/net/osmand/util/Algorithms.java

@@ -49,7 +49,7 @@ public class Algorithms {
 		return map == null || map.size() == 0;
 	}
 
-	public static boolean isEmpty(String s) {
+	public static boolean isEmpty(CharSequence s) {
 		return s == null || s.length() == 0;
 	}
 

OsmAnd/res/layout/download_description_button.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<net.osmand.plus.widgets.TextViewEx xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/button_text"
+	android:layout_width="wrap_content"
+	android:layout_height="wrap_content"
+	android:background="?attr/selectableItemBackground"
+	android:letterSpacing="@dimen/description_letter_spacing"
+	android:paddingLeft="@dimen/content_padding_half"
+	android:paddingTop="@dimen/content_padding_half"
+	android:paddingRight="@dimen/content_padding_half"
+	android:paddingBottom="@dimen/content_padding_half"
+	android:textColor="?attr/active_color_basic"
+	android:textSize="@dimen/default_desc_text_size"
+	app:typeface="@string/font_roboto_medium"
+	tools:text="@string/read_more" />

OsmAnd/res/layout/group_description_item.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="wrap_content"
+	android:background="?attr/card_and_list_background_basic">
+
+	<LinearLayout
+		android:id="@+id/container"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:orientation="vertical"
+		android:paddingBottom="@dimen/list_header_settings_top_margin">
+
+		<net.osmand.plus.LockableViewPager
+			android:id="@+id/images_pager"
+			android:layout_width="match_parent"
+			android:layout_height="132dp" />
+
+		<net.osmand.plus.widgets.TextViewEx
+			android:id="@+id/description"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:letterSpacing="@dimen/text_button_letter_spacing"
+			android:paddingLeft="@dimen/content_padding"
+			android:paddingTop="@dimen/list_header_settings_top_margin"
+			android:paddingRight="@dimen/content_padding"
+			android:textColor="?android:textColorPrimary"
+			android:textSize="@dimen/default_list_text_size"
+			app:typeface="@string/font_roboto_regular"
+			tools:text="@string/plugin_disabled_descr" />
+
+		<LinearLayout
+			android:id="@+id/buttons_container"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:layout_marginLeft="@dimen/content_padding_half"
+			android:layout_marginTop="@dimen/list_header_settings_top_margin"
+			android:layout_marginRight="@dimen/content_padding_half"
+			android:orientation="vertical" />
+
+	</LinearLayout>
+
+</LinearLayout>

OsmAnd/res/layout/plugin.xml

@@ -15,7 +15,7 @@
 
         <ImageView
             android:id="@+id/plugin_image"
-            android:layout_width="wrap_content"
+            android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_gravity="center_horizontal"
             android:adjustViewBounds="true"

OsmAnd/res/values/strings.xml

@@ -11,6 +11,7 @@
 	Thx - Hardy
 
 -->
+    <string name="download_unsupported_action">Unsupported action %1$s</string>
     <string name="extra_maps_menu_group">Extra maps</string>
     <string name="custom_color">Custom color</string>
     <string name="lang_lmo">Lombard</string>

OsmAnd/src/net/osmand/JsonUtils.java

@@ -44,12 +44,16 @@ public class JsonUtils {
 	}
 
 	public static Map<String, String> getLocalizedMapFromJson(String key, JSONObject json) throws JSONException {
-		Map<String, String> localizedMap = new HashMap<>();
 		JSONObject jsonObject = json.optJSONObject(key);
-		if (jsonObject != null) {
+		return getLocalizedMapFromJson(jsonObject);
-			for (Iterator<String> it = jsonObject.keys(); it.hasNext(); ) {
+	}
+
+	public static Map<String, String> getLocalizedMapFromJson(JSONObject json) throws JSONException {
+		Map<String, String> localizedMap = new HashMap<>();
+		if (json != null) {
+			for (Iterator<String> it = json.keys(); it.hasNext(); ) {
 				String localeKey = it.next();
-				String name = jsonObject.getString(localeKey);
+				String name = json.getString(localeKey);
 				localizedMap.put(localeKey, name);
 			}
 		}

OsmAnd/src/net/osmand/plus/CustomOsmandPlugin.java

@@ -3,6 +3,7 @@ package net.osmand.plus;
 import android.app.Activity;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
+import android.text.Html;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -86,8 +87,9 @@ public class CustomOsmandPlugin extends OsmandPlugin {
 	}
 
 	@Override
-	public String getDescription() {
+	public CharSequence getDescription() {
-		return JsonUtils.getLocalizedResFromMap(app, descriptions, null);
+		String description = JsonUtils.getLocalizedResFromMap(app, descriptions, null);
+		return description != null ? Html.fromHtml(description) : null;
 	}
 
 	public String getResourceDirName() {

OsmAnd/src/net/osmand/plus/CustomRegion.java

@@ -1,6 +1,7 @@
 package net.osmand.plus;
 
 import androidx.annotation.ColorInt;
+import androidx.annotation.Nullable;
 
 import net.osmand.JsonUtils;
 import net.osmand.PlatformUtil;
@@ -8,6 +9,7 @@ import net.osmand.map.WorldRegion;
 import net.osmand.plus.download.CustomIndexItem;
 import net.osmand.plus.download.DownloadActivityType;
 import net.osmand.plus.download.IndexItem;
+import net.osmand.plus.download.ui.DownloadDescriptionInfo;
 import net.osmand.util.Algorithms;
 
 import org.apache.commons.logging.Log;
@@ -31,10 +33,11 @@ public class CustomRegion extends WorldRegion {
 	private String parentPath;
 	private String type;
 	private String subfolder;
-	private String headerButton;
 
 	private JSONArray downloadItemsJson;
 
+	private DownloadDescriptionInfo descriptionInfo;
+
 	private Map<String, String> names = new HashMap<>();
 	private Map<String, String> icons = new HashMap<>();
 	private Map<String, String> headers = new HashMap<>();
@@ -66,6 +69,11 @@ public class CustomRegion extends WorldRegion {
 		return headerColor;
 	}
 
+	@Nullable
+	public DownloadDescriptionInfo getDescriptionInfo() {
+		return descriptionInfo;
+	}
+
 	public static CustomRegion fromJson(JSONObject object) throws JSONException {
 		String scopeId = object.optString("scope-id", null);
 		String path = object.optString("path", null);
@@ -90,7 +98,6 @@ public class CustomRegion extends WorldRegion {
 		region.icons = JsonUtils.getLocalizedMapFromJson("icon", object);
 		region.headers = JsonUtils.getLocalizedMapFromJson("header", object);
 
-		region.headerButton = object.optString("header-button", null);
 		region.downloadItemsJson = object.optJSONArray("items");
 
 		String headerColor = object.optString("header-color", null);
@@ -99,10 +106,31 @@ public class CustomRegion extends WorldRegion {
 		} catch (IllegalArgumentException e) {
 			region.headerColor = 0;
 		}
+		region.descriptionInfo = DownloadDescriptionInfo.fromJson(object.optJSONObject("description"));
 
 		return region;
 	}
 
+	public JSONObject toJson() throws JSONException {
+		JSONObject jsonObject = new JSONObject();
+
+		jsonObject.putOpt("scope-id", scopeId);
+		jsonObject.putOpt("path", path);
+		jsonObject.putOpt("type", type);
+		jsonObject.putOpt("subfolder", subfolder);
+
+		JsonUtils.writeLocalizedMapToJson("name", jsonObject, names);
+		JsonUtils.writeLocalizedMapToJson("icon", jsonObject, icons);
+		JsonUtils.writeLocalizedMapToJson("header", jsonObject, headers);
+
+		if (descriptionInfo != null) {
+			jsonObject.putOpt("description", descriptionInfo.toJson());
+		}
+		jsonObject.putOpt("items", downloadItemsJson);
+
+		return jsonObject;
+	}
+
 	public List<IndexItem> loadIndexItems() {
 		List<IndexItem> items = new ArrayList<>();
 		if (downloadItemsJson != null) {
@@ -152,22 +180,4 @@ public class CustomRegion extends WorldRegion {
 		}
 		return items;
 	}
-
-	public JSONObject toJson() throws JSONException {
-		JSONObject jsonObject = new JSONObject();
-
-		jsonObject.putOpt("scope-id", scopeId);
-		jsonObject.putOpt("path", path);
-		jsonObject.putOpt("type", type);
-		jsonObject.putOpt("subfolder", subfolder);
-		jsonObject.putOpt("header-button", headerButton);
-
-		JsonUtils.writeLocalizedMapToJson("name", jsonObject, names);
-		JsonUtils.writeLocalizedMapToJson("icon", jsonObject, icons);
-		JsonUtils.writeLocalizedMapToJson("header", jsonObject, headers);
-
-		jsonObject.putOpt("items", downloadItemsJson);
-
-		return jsonObject;
-	}
 }

OsmAnd/src/net/osmand/plus/OsmAndAppCustomization.java

@@ -67,8 +67,6 @@ public class OsmAndAppCustomization {
 
 	private Map<String, Bitmap> navDrawerLogos = new HashMap<>();
 
-	private ArrayList<String> navDrawerParams;
-
 	private String navDrawerFooterIntent;
 	private String navDrawerFooterAppName;
 	private String navDrawerFooterPackageName;
@@ -254,8 +252,8 @@ public class OsmAndAppCustomization {
 	}
 
 	@Nullable
-	public ArrayList<String> getNavDrawerLogoParams() {
+	public String getNavDrawerLogoUrl() {
-		return navDrawerParams;
+		return app.getSettings().NAV_DRAWER_URL.get();
 	}
 
 	public boolean setNavDrawerLogo(String uri, @Nullable String packageName, @Nullable String intent) {
@@ -300,10 +298,8 @@ public class OsmAndAppCustomization {
 			} catch (IOException e) {
 				LOG.error("Failed to write file", e);
 			}
-			if (packageName != null && intent != null) {
+			if (!Algorithms.isEmpty(intent)) {
-				navDrawerParams = new ArrayList<>();
+				app.getSettings().NAV_DRAWER_LOGO.set(intent);
-				navDrawerParams.add(packageName);
-				navDrawerParams.add(intent);
 			}
 		}
 		return true;

OsmAnd/src/net/osmand/plus/OsmandPlugin.java

@@ -85,7 +85,7 @@ public abstract class OsmandPlugin {
 
 	public abstract String getName();
 
-	public abstract String getDescription();
+	public abstract CharSequence getDescription();
 
 	@Nullable
 	public Drawable getAssetResourceImage() {

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

@@ -1453,7 +1453,8 @@ public class OsmandSettings {
 
 	public final CommonPreference<String> API_NAV_DRAWER_ITEMS_JSON = new StringPreference("api_nav_drawer_items_json", "{}").makeGlobal();
 	public final CommonPreference<String> API_CONNECTED_APPS_JSON = new StringPreference("api_connected_apps_json", "[]").makeGlobal();
-	public final CommonPreference<String> NAV_DRAWER_LOGO = new StringPreference("nav_drawer_logo", "").makeProfile();
+	public final CommonPreference<String> NAV_DRAWER_LOGO = new StringPreference("drawer_logo", "").makeProfile();
+	public final CommonPreference<String> NAV_DRAWER_URL = new StringPreference("drawer_url", "").makeProfile();
 
 	public final CommonPreference<Integer> NUMBER_OF_STARTS_FIRST_XMAS_SHOWN = new IntPreference("number_of_starts_first_xmas_shown", 0).makeGlobal();
 

OsmAnd/src/net/osmand/plus/SettingsHelper.java

@@ -981,8 +981,9 @@ public class SettingsHelper {
 
 		@Override
 		void readItemsFromJson(@NonNull JSONObject json) throws IllegalArgumentException {
+			JSONObject prefsJson = json.optJSONObject("prefs");
 			try {
-				JSONObject drawerLogoJson = json.has("drawerLogo") ? json.getJSONObject("drawerLogo") : null;
+				JSONObject drawerLogoJson = prefsJson.optJSONObject("drawer_logo");
 				if (drawerLogoJson != null) {
 					for (Iterator<String> it = drawerLogoJson.keys(); it.hasNext(); ) {
 						String localeKey = it.next();

OsmAnd/src/net/osmand/plus/activities/MapActivityActions.java

@@ -6,6 +6,7 @@ import android.app.Dialog;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.graphics.Bitmap;
+import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.view.View;
@@ -55,6 +56,7 @@ import net.osmand.plus.dialogs.FavoriteDialogs;
 import net.osmand.plus.download.IndexItem;
 import net.osmand.plus.liveupdates.OsmLiveActivity;
 import net.osmand.plus.mapcontextmenu.AdditionalActionsBottomSheetDialogFragment;
+import net.osmand.plus.mapcontextmenu.AdditionalActionsBottomSheetDialogFragment.ContextMenuItemClickListener;
 import net.osmand.plus.mapmarkers.MapMarkersDialogFragment;
 import net.osmand.plus.mapmarkers.MarkersPlanRouteContext;
 import net.osmand.plus.measurementtool.MeasurementToolFragment;
@@ -64,11 +66,11 @@ import net.osmand.plus.routepreparationmenu.WaypointsFragment;
 import net.osmand.plus.routing.RouteProvider.GPXRouteParamsBuilder;
 import net.osmand.plus.routing.RoutingHelper;
 import net.osmand.plus.settings.BaseSettingsFragment;
-import net.osmand.plus.mapcontextmenu.AdditionalActionsBottomSheetDialogFragment.ContextMenuItemClickListener;
 import net.osmand.plus.views.BaseMapLayer;
 import net.osmand.plus.views.MapControlsLayer;
 import net.osmand.plus.views.MapTileLayer;
 import net.osmand.plus.views.OsmandMapTileView;
+import net.osmand.plus.wikipedia.WikipediaDialogFragment;
 import net.osmand.plus.wikivoyage.WikivoyageWelcomeDialogFragment;
 import net.osmand.plus.wikivoyage.data.TravelDbHelper;
 import net.osmand.plus.wikivoyage.explore.WikivoyageExploreActivity;
@@ -1144,28 +1146,8 @@ public class MapActivityActions implements DialogProvider {
 		menu.show();
 	}
 
-	public void restoreOrReturnDialog(final String packageName) {
-        AlertDialog.Builder builder = new AlertDialog.Builder(mapActivity);
-        builder.setTitle("Restore OsmAnd");
-        builder.setMessage("Do you want to Restore OsmAnd or get back to the Client App?");
-        builder.setPositiveButton("Restore", new DialogInterface.OnClickListener() {
-            @Override
-            public void onClick(DialogInterface dialogInterface, int i) {
-                restoreOsmand();
-            }
-        });
-        builder.setNeutralButton("Return", new DialogInterface.OnClickListener() {
-            @Override
-            public void onClick(DialogInterface dialogInterface, int i) {
-                executeHeadersIntent(packageName);
-            }
-        });
-        builder.setNegativeButton("Cancel", null);
-        builder.show();
-    }
-
 	protected void updateDrawerMenu() {
-		boolean nightMode = getMyApplication().getDaynightHelper().isNightModeForMapControls();
+		final boolean nightMode = getMyApplication().getDaynightHelper().isNightModeForMapControls();
 		final ListView menuItemsListView = (ListView) mapActivity.findViewById(R.id.menuItems);
 		if (nightMode) {
 			menuItemsListView.setBackgroundColor(ContextCompat.getColor(mapActivity, R.color.list_background_color_dark));
@@ -1174,7 +1156,6 @@ public class MapActivityActions implements DialogProvider {
 		}
 		menuItemsListView.removeHeaderView(drawerLogoHeader);
 		Bitmap navDrawerLogo = getMyApplication().getAppCustomization().getNavDrawerLogo();
-		final ArrayList<String> navDrawerLogoParams = getMyApplication().getAppCustomization().getNavDrawerLogoParams();
 
 		if (navDrawerLogo != null) {
 			drawerLogoHeader.setImageBitmap(navDrawerLogo);
@@ -1193,8 +1174,9 @@ public class MapActivityActions implements DialogProvider {
 				boolean hasHeader = menuItemsListView.getHeaderViewsCount() > 0;
 				boolean hasFooter = menuItemsListView.getFooterViewsCount() > 0;
 				if (hasHeader && position == 0 || (hasFooter && position == menuItemsListView.getCount() - 1)) {
-					if (navDrawerLogoParams != null) {
+					String drawerLogoParams = getMyApplication().getAppCustomization().getNavDrawerLogoUrl();
-						executeHeadersIntent(navDrawerLogoParams.get(0));
+					if (!Algorithms.isEmpty(drawerLogoParams)) {
+						WikipediaDialogFragment.showFullArticle(mapActivity, Uri.parse(drawerLogoParams), nightMode);
 					}
 				} else {
 					position -= menuItemsListView.getHeaderViewsCount();
@@ -1209,20 +1191,4 @@ public class MapActivityActions implements DialogProvider {
 
 		});
 	}
-
-	private void executeHeadersIntent(String packageName) {
-		Intent launchIntent = mapActivity.getPackageManager().getLaunchIntentForPackage(packageName);
-		if(launchIntent!=null) mapActivity.startActivity(launchIntent);
-		mapActivity.closeDrawer();
-	}
-
-	private void showReturnConfirmationDialog(String packageName) {
-		restoreOrReturnDialog(packageName);
-	    mapActivity.closeDrawer();
-	}
-
-	private void restoreOsmand(){
-		getMyApplication().getAppCustomization().restoreOsmand();
-		mapActivity.closeDrawer();
-	}
 }

OsmAnd/src/net/osmand/plus/activities/PluginActivity.java

@@ -7,6 +7,7 @@ import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
+import android.text.method.LinkMovementMethod;
 import android.util.Log;
 import android.view.MenuItem;
 import android.view.View;
@@ -15,9 +16,11 @@ import android.widget.CompoundButton;
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import androidx.core.content.ContextCompat;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
 
+import net.osmand.AndroidUtils;
 import net.osmand.plus.OsmandApplication;
 import net.osmand.plus.OsmandPlugin;
 import net.osmand.plus.R;
@@ -74,6 +77,14 @@ public class PluginActivity extends OsmandActionBarActivity  implements Download
 		TextView descriptionView = (TextView) findViewById(R.id.plugin_description);
 		descriptionView.setText(plugin.getDescription());
 
+		boolean light = getMyApplication().getSettings().isLightContent();
+		int linkTextColor = ContextCompat.getColor(this,
+				light ? R.color.ctx_menu_bottom_view_url_color_light : R.color.ctx_menu_bottom_view_url_color_dark);
+
+		descriptionView.setLinkTextColor(linkTextColor);
+		descriptionView.setMovementMethod(LinkMovementMethod.getInstance());
+		AndroidUtils.removeLinkUnderline(descriptionView);
+
 		Button settingsButton = (Button) findViewById(R.id.plugin_settings);
 		settingsButton.setOnClickListener(new View.OnClickListener() {
 			@Override

OsmAnd/src/net/osmand/plus/activities/PluginsActivity.java

@@ -5,6 +5,7 @@ import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.res.TypedArray;
 import android.os.Bundle;
+import android.text.method.LinkMovementMethod;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
@@ -17,6 +18,7 @@ import android.widget.TextView;
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.widget.PopupMenu;
+import androidx.core.content.ContextCompat;
 import androidx.fragment.app.Fragment;
 
 import net.osmand.AndroidUtils;
@@ -182,6 +184,14 @@ public class PluginsActivity extends OsmandListActivity implements DownloadIndex
 				name = plugin.getName();
 				pluginDescription.setText(plugin.getDescription());
 
+				boolean light = getMyApplication().getSettings().isLightContent();
+				int linkTextColor = ContextCompat.getColor(PluginsActivity.this,
+						light ? R.color.ctx_menu_bottom_view_url_color_light : R.color.ctx_menu_bottom_view_url_color_dark);
+
+				pluginDescription.setLinkTextColor(linkTextColor);
+				pluginDescription.setMovementMethod(LinkMovementMethod.getInstance());
+				AndroidUtils.removeLinkUnderline(pluginDescription);
+
 				OsmandApplication app = getMyApplication();
 				int color = AndroidUtils.getColorFromAttr(app, R.attr.list_background_color);
 				pluginLogo.setImageDrawable(UiUtilities.tintDrawable(plugin.getLogoResource(), color));

OsmAnd/src/net/osmand/plus/base/bottomsheetmenu/BottomSheetItemWithDescription.java

@@ -110,8 +110,9 @@ public class BottomSheetItemWithDescription extends SimpleBottomSheetItem {
 			return this;
 		}
 
-		public void setDescriptionLinksClickable(boolean descriptionLinksClickable) {
+		public Builder setDescriptionLinksClickable(boolean descriptionLinksClickable) {
 			this.descriptionLinksClickable = descriptionLinksClickable;
+			return this;
 		}
 
 		public BottomSheetItemWithDescription create() {

OsmAnd/src/net/osmand/plus/dialogs/PluginInstalledBottomSheetDialog.java

@@ -109,6 +109,7 @@ public class PluginInstalledBottomSheetDialog extends MenuBottomSheetDialogFragm
 						setupHeightAndBackground(getView());
 					}
 				})
+				.setDescriptionLinksClickable(true)
 				.setDescription(plugin.getDescription())
 				.setDescriptionMaxLines(COLLAPSED_DESCRIPTION_LINES)
 				.setLayoutId(R.layout.bottom_sheet_item_with_expandable_descr)

OsmAnd/src/net/osmand/plus/download/DownloadResources.java

@@ -470,7 +470,7 @@ public class DownloadResources extends DownloadResourceGroup {
 					mainGrp.addGroup(flatFiles);
 				}
 			}
-			DownloadResourceGroup subRegions = new DownloadResourceGroup(mainGrp, DownloadResourceGroupType.SUBREGIONS);
+			DownloadResourceGroup subRegions = new DownloadResourceGroup(mainGrp, DownloadResourceGroupType.EXTRA_MAPS);
 			mainGrp.addGroup(subRegions);
 			// add to processing queue
 			for (WorldRegion rg : subregions) {

OsmAnd/src/net/osmand/plus/download/ui/DownloadDescriptionInfo.java

@@ -0,0 +1,112 @@
+package net.osmand.plus.download.ui;
+
+import android.content.Context;
+import android.text.Html;
+
+import net.osmand.JsonUtils;
+import net.osmand.PlatformUtil;
+
+import org.apache.commons.logging.Log;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+public class DownloadDescriptionInfo {
+
+	private static final Log LOG = PlatformUtil.getLog(DownloadDescriptionInfo.class);
+
+	private JSONArray buttonsJson;
+	private List<String> imageUrls;
+	private Map<String, String> texts;
+
+	public List<String> getImageUrls() {
+		return imageUrls;
+	}
+
+	public CharSequence getLocalizedDescription(Context ctx) {
+		String description = JsonUtils.getLocalizedResFromMap(ctx, texts, null);
+		return description != null ? Html.fromHtml(description) : null;
+	}
+
+	public List<ActionButton> getActionButtons(Context ctx) {
+		List<ActionButton> actionButtons = new ArrayList<>();
+		if (buttonsJson != null) {
+			try {
+				for (int i = 0; i < buttonsJson.length(); i++) {
+					String url = null;
+					String actionType = null;
+
+					JSONObject object = buttonsJson.getJSONObject(i);
+					if (object.has("url")) {
+						url = object.optString("url");
+					} else if (object.has("action")) {
+						actionType = object.optString("action");
+					}
+					Map<String, String> localizedMap = JsonUtils.getLocalizedMapFromJson(object);
+					String name = JsonUtils.getLocalizedResFromMap(ctx, localizedMap, null);
+
+					ActionButton actionButton = new ActionButton(actionType, name, url);
+					actionButtons.add(actionButton);
+				}
+			} catch (JSONException e) {
+				e.printStackTrace();
+			}
+		}
+		return actionButtons;
+	}
+
+	public static DownloadDescriptionInfo fromJson(JSONObject json) {
+		if (json != null) {
+			DownloadDescriptionInfo downloadDescriptionInfo = new DownloadDescriptionInfo();
+			try {
+				downloadDescriptionInfo.texts = JsonUtils.getLocalizedMapFromJson("text", json);
+				downloadDescriptionInfo.imageUrls = JsonUtils.jsonArrayToList("image", json);
+				downloadDescriptionInfo.buttonsJson = json.optJSONArray("button");
+			} catch (JSONException e) {
+				LOG.error(e);
+			}
+			return downloadDescriptionInfo;
+		}
+		return null;
+	}
+
+	public JSONObject toJson() throws JSONException {
+		JSONObject descrJson = new JSONObject();
+
+		JsonUtils.writeLocalizedMapToJson("text", descrJson, texts);
+		JsonUtils.writeStringListToJson("image", descrJson, imageUrls);
+
+		descrJson.putOpt("button", buttonsJson);
+
+		return descrJson;
+	}
+
+	public static class ActionButton {
+
+		private String actionType;
+		private String name;
+		private String url;
+
+		public ActionButton(String actionType, String name, String url) {
+			this.actionType = actionType;
+			this.name = name;
+			this.url = url;
+		}
+
+		public String getActionType() {
+			return actionType;
+		}
+
+		public String getName() {
+			return name;
+		}
+
+		public String getUrl() {
+			return url;
+		}
+	}
+}

OsmAnd/src/net/osmand/plus/download/ui/DownloadResourceGroupFragment.java

@@ -5,6 +5,7 @@ import android.app.ProgressDialog;
 import android.content.DialogInterface;
 import android.content.res.Resources;
 import android.graphics.drawable.Drawable;
+import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.util.TypedValue;
@@ -21,15 +22,22 @@ import android.widget.ExpandableListView.OnChildClickListener;
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.widget.Toolbar;
 import androidx.core.view.MenuItemCompat;
 import androidx.fragment.app.DialogFragment;
+import androidx.viewpager.widget.PagerAdapter;
+
+import com.squareup.picasso.Callback;
+import com.squareup.picasso.Picasso;
 
 import net.osmand.AndroidNetworkUtils;
 import net.osmand.AndroidUtils;
+import net.osmand.PicassoUtils;
+import net.osmand.plus.CustomRegion;
+import net.osmand.plus.LockableViewPager;
 import net.osmand.plus.OsmandApplication;
-import net.osmand.plus.OsmandSettings;
 import net.osmand.plus.R;
 import net.osmand.plus.UiUtilities;
 import net.osmand.plus.activities.OsmandBaseExpandableListAdapter;
@@ -43,9 +51,12 @@ import net.osmand.plus.download.DownloadResourceGroup.DownloadResourceGroupType;
 import net.osmand.plus.download.DownloadResources;
 import net.osmand.plus.download.DownloadValidationManager;
 import net.osmand.plus.download.IndexItem;
+import net.osmand.plus.download.ui.DownloadDescriptionInfo.ActionButton;
+import net.osmand.plus.helpers.AndroidUiHelper;
 import net.osmand.plus.inapp.InAppPurchaseHelper;
 import net.osmand.plus.inapp.InAppPurchaseHelper.InAppPurchaseListener;
 import net.osmand.plus.inapp.InAppPurchaseHelper.InAppPurchaseTaskType;
+import net.osmand.plus.wikipedia.WikipediaDialogFragment;
 import net.osmand.util.Algorithms;
 
 import org.json.JSONException;
@@ -77,13 +88,15 @@ public class DownloadResourceGroupFragment extends DialogFragment implements Dow
 	private View searchView;
 	private View restorePurchasesView;
 	private View subscribeEmailView;
+	private View descriptionView;
+	private boolean nightMode;
 
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		purchaseHelper = getDownloadActivity().getPurchaseHelper();
-		boolean isLightTheme = getMyApplication().getSettings().OSMAND_THEME.get() == OsmandSettings.OSMAND_LIGHT_THEME;
+		nightMode = !getMyApplication().getSettings().isLightContent();
-		int themeId = isLightTheme ? R.style.OsmandLightTheme : R.style.OsmandDarkTheme;
+		int themeId = nightMode ? R.style.OsmandDarkTheme : R.style.OsmandLightTheme;
 		setStyle(STYLE_NO_FRAME, themeId);
 		setHasOptionsMenu(true);
 	}
@@ -133,6 +146,7 @@ public class DownloadResourceGroupFragment extends DialogFragment implements Dow
 		addSubscribeEmailRow();
 		addSearchRow();
 		addRestorePurchasesRow();
+		addDescriptionRow();
 		listView.setOnChildClickListener(this);
 		listAdapter = new DownloadResourceGroupAdapter(activity);
 		listView.setAdapter(listAdapter);
@@ -180,6 +194,11 @@ public class DownloadResourceGroupFragment extends DialogFragment implements Dow
 		}
 	}
 
+	private void addDescriptionRow() {
+		descriptionView = activity.getLayoutInflater().inflate(R.layout.group_description_item, listView, false);
+		listView.addHeaderView(descriptionView);
+	}
+
 	private void addSearchRow() {
 		if (!openAsDialog() ) {
 			searchView = activity.getLayoutInflater().inflate(R.layout.simple_list_menu_item, null);
@@ -231,6 +250,53 @@ public class DownloadResourceGroupFragment extends DialogFragment implements Dow
 		}
 	}
 
+	private void updateDescriptionView() {
+		if (descriptionView != null) {
+			if (group != null && group.getRegion() instanceof CustomRegion) {
+				CustomRegion customRegion = (CustomRegion) group.getRegion();
+				DownloadDescriptionInfo downloadDescriptionInfo = customRegion.getDescriptionInfo();
+				if (downloadDescriptionInfo != null) {
+					TextView description = descriptionView.findViewById(R.id.description);
+					CharSequence descr = downloadDescriptionInfo.getLocalizedDescription(activity);
+					description.setText(descr);
+					AndroidUiHelper.updateVisibility(description, !Algorithms.isEmpty(descr));
+
+					ViewGroup buttonsContainer = descriptionView.findViewById(R.id.buttons_container);
+					buttonsContainer.removeAllViews();
+					for (final ActionButton actionButton : downloadDescriptionInfo.getActionButtons(activity)) {
+						String name = actionButton.getName();
+						if (!Algorithms.isEmpty(name)) {
+							TextView buttonText = (TextView) activity.getLayoutInflater().inflate(R.layout.download_description_button, buttonsContainer, false);
+							buttonText.setText(name);
+							buttonText.setOnClickListener(new OnClickListener() {
+								@Override
+								public void onClick(View v) {
+									if (actionButton.getUrl() != null) {
+										WikipediaDialogFragment.showFullArticle(activity, Uri.parse(actionButton.getUrl()), nightMode);
+									} else {
+										activity.getMyApplication().showShortToastMessage(R.string.download_unsupported_action, actionButton.getActionType());
+									}
+								}
+							});
+							buttonsContainer.addView(buttonText);
+						}
+					}
+					LockableViewPager viewPager = descriptionView.findViewById(R.id.images_pager);
+					if (!Algorithms.isEmpty(downloadDescriptionInfo.getImageUrls())) {
+						ImagesPagerAdapter adapter = new ImagesPagerAdapter(downloadDescriptionInfo.getImageUrls());
+						viewPager.setAdapter(adapter);
+					} else {
+						viewPager.setVisibility(View.GONE);
+					}
+
+					descriptionView.findViewById(R.id.container).setVisibility(View.VISIBLE);
+					return;
+				}
+			}
+			descriptionView.findViewById(R.id.container).setVisibility(View.GONE);
+		}
+	}
+
 	private void hideSubscribeEmailView() {
 		if (subscribeEmailView != null && subscribeEmailView.findViewById(R.id.container).getVisibility() == View.VISIBLE) {
 			subscribeEmailView.findViewById(R.id.container).setVisibility(View.GONE);
@@ -389,12 +455,15 @@ public class DownloadResourceGroupFragment extends DialogFragment implements Dow
 	}
 
 	private void reloadData() {
+		DownloadResources indexes = activity.getDownloadThread().getIndexes();
+		group = indexes.getGroupById(groupId);
+
 		if (!openAsDialog()) {
 			updateSearchView();
 		}
 		updateSubscribeEmailView();
-		DownloadResources indexes = activity.getDownloadThread().getIndexes();
+		updateDescriptionView();
-		group = indexes.getGroupById(groupId);
+
 		if (group != null) {
 			listAdapter.update(group);
 			toolbar.setTitle(group.getName(activity));
@@ -729,4 +798,60 @@ public class DownloadResourceGroupFragment extends DialogFragment implements Dow
 			return true;
 		}
 	}
+
+	private class ImagesPagerAdapter extends PagerAdapter {
+
+		private PicassoUtils picassoUtils;
+
+		private List<String> imageUrls;
+
+		public ImagesPagerAdapter(List<String> imageUrls) {
+			this.imageUrls = imageUrls;
+			picassoUtils = PicassoUtils.getPicasso(getMyApplication());
+		}
+
+		@Override
+		public int getCount() {
+			return imageUrls.size();
+		}
+
+		@Override
+		public Object instantiateItem(ViewGroup container, int position) {
+			View view = createImageView(position);
+			container.addView(view, 0);
+
+			return view;
+		}
+
+		@Override
+		public void destroyItem(ViewGroup collection, int position, @NonNull Object view) {
+			collection.removeView((View) view);
+		}
+
+		@Override
+		public boolean isViewFromObject(@NonNull View view, @NonNull Object object) {
+			return view == object;
+		}
+
+		private View createImageView(int position) {
+			final ImageView imageView = new ImageView(getContext());
+			imageView.setScaleType(ImageView.ScaleType.FIT_XY);
+
+			final String imageUrl = imageUrls.get(position);
+			Picasso.get().load(imageUrl).into(imageView, new Callback() {
+				@Override
+				public void onSuccess() {
+					imageView.setVisibility(View.VISIBLE);
+					picassoUtils.setResultLoaded(imageUrl, true);
+				}
+
+				@Override
+				public void onError(Exception e) {
+					imageView.setVisibility(View.INVISIBLE);
+					picassoUtils.setResultLoaded(imageUrl, false);
+				}
+			});
+			return imageView;
+		}
+	}
 }