在Android地图中使用Polygon自定义TileProvider [英] Custom TileProvider with Polygon in Android maps

问题描述

我在绘制Android地图上的多边形时遇到问题。
问题是我有TileOverlay，所以多边形还是在叠加层下。

I'm having problems drawing a polygon on Android map. The problem is that I have TileOverlays so the polygon is kinda under the overlays.

我在GoogleMap上绘制多边形，如下所示：

I'm drawing a polygon on GoogleMap like this:

map.addPolygon(new PolygonOptions().add(points).strokeColor(Color.RED).strokeWidth(3f));
map.animateCamera(CameraUpdateFactory.newLatLngZoom(points[0], 18));

在瓷砖开始加载之前，我可以看到多边形，但它不见了。我想实现多边形绘制在TileProvider上。

I can see the polygon before the tiles are starting to load but then it's gone. I would like to achieve that the polygon is drawn over the TileProvider.

我有一个自定义TileProvider，它有三层：缓存层，自定义地图层和数据层，它是部分透明。

I have a custom TileProvider which does three layers: cached layer, custom map layer and data layer which is partly transparent.

加载地图时，我创建了所有三层：

When map loads, I create all three layers:

cacheLayer = map.addTileOverlay(new TileOverlayOptions().tileProvider(addCache()));
mapLayer = map.addTileOverlay(new TileOverlayOptions().tileProvider(addMap()));
dataLayer = map.addTileOverlay(new TileOverlayOptions().tileProvider(addData()));

我怎么能达到多边形在它们之上？或者至少在地图图层之上？我应该为多边形创建另一个覆盖层吗？如果是这样，我如何在TileProvider上绘制多边形？如果可能的话，我可以在dataLayer上绘制它？

How could I achieve that the polygon is above them all? Or at least above the map layer? Should I create another overlay just for the polygon? If so, how can I draw a polygon on the TileProvider? If that is possible, I could just draw it on the dataLayer?

推荐答案

哦，这个解决方案非常简单，如果有人否则将来会遇到问题：

Oh well, the solution is pretty simple, if anyone else will have the problem in the future:

cacheLayer = map.addTileOverlay(new TileOverlayOptions().tileProvider(addCache()).zIndex(1));
mapLayer = map.addTileOverlay(new TileOverlayOptions().tileProvider(addMap()).zIndex(2));
dataLayer = map.addTileOverlay(new TileOverlayOptions().tileProvider(addData()).zIndex(3));

而对于多边形：

map.addPolygon(new PolygonOptions().add(points).strokeColor(Color.RED).strokeWidth(3f).zIndex(4));
map.animateCamera(CameraUpdateFactory.newLatLngZoom(points[0], 18));

这篇关于在Android地图中使用Polygon自定义TileProvider的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！