[android] show/hide delete bookmark menu item

2 files changed, 33 insertions, 5 deletions

diff --git a/android/src/com/mapswithme/maps/bookmarks/BookmarkCategoriesFragment.java b/android/src/com/mapswithme/maps/bookmarks/BookmarkCategoriesFragment.java
index 9639127e71..40b5ace3dd 100644
--- a/android/src/com/mapswithme/maps/bookmarks/BookmarkCategoriesFragment.java
+++ b/android/src/com/mapswithme/maps/bookmarks/BookmarkCategoriesFragment.java
@@ -232,12 +232,17 @@ public class BookmarkCategoriesFragment extends BaseMwmRecyclerFragment
     BottomSheetHelper.Builder bs = BottomSheetHelper.create(getActivity(), name)
                                                     .sheet(R.menu.menu_bookmark_categories)
                                                     .listener(this);
-    MenuItem show = bs.getMenu().getItem(0);
+
     final boolean isVisible = bmManager.isVisible(mSelectedCatId);
-    show.setIcon(isVisible ? R.drawable.ic_hide
-                           : R.drawable.ic_show);
-    show.setTitle(isVisible ? R.string.hide
-                            : R.string.show);
+    bs.getItemByIndex(0)
+      .setIcon(isVisible ? R.drawable.ic_hide : R.drawable.ic_show)
+      .setTitle(isVisible ? R.string.hide : R.string.show);
+
+    final boolean deleteIsPossible = bmManager.getCategoriesCount() > 1;
+    bs.getItemById(R.id.set_delete)
+      .setVisible(deleteIsPossible)
+      .setEnabled(deleteIsPossible);
+
     bs.tint().show();
   }
 
diff --git a/android/src/com/mapswithme/util/BottomSheetHelper.java b/android/src/com/mapswithme/util/BottomSheetHelper.java
index 16b938080b..e77ca22afd 100644
--- a/android/src/com/mapswithme/util/BottomSheetHelper.java
+++ b/android/src/com/mapswithme/util/BottomSheetHelper.java
@@ -6,6 +6,7 @@ import android.content.ContextWrapper;
 import android.content.DialogInterface;
 import android.graphics.drawable.Drawable;
 import android.support.annotation.DrawableRes;
+import android.support.annotation.IdRes;
 import android.support.annotation.MenuRes;
 import android.support.annotation.NonNull;
 import android.support.annotation.StringRes;
@@ -157,6 +158,28 @@ public final class BottomSheetHelper
 
       return this;
     }
+
+    @NonNull
+    public MenuItem getItemByIndex(int index)
+    {
+      MenuItem item = getMenu().getItem(index);
+
+      if (item == null)
+        throw new AssertionError("Can not find bottom sheet item with index: " + index);
+
+      return item;
+    }
+
+    @NonNull
+    public MenuItem getItemById(@IdRes int id)
+    {
+      MenuItem item = getMenu().findItem(id);
+
+      if (item == null)
+        throw new AssertionError("Can not find bottom sheet item with id: " + id);
+
+      return item;
+    }
   }