如何在osmdroid中的折线中间添加下方/上方的文本 [英] How to add text below/above in the middle of the polyline in osmdroid

问题描述

如何在osmdroid的折线中间添加下方/上方文本?setTitle() 不起作用，setSubDescription() 也不起作用.
以及如何添加按钮叠加层.

How to add text below/above in the middle of the polyline in osmdroid? setTitle() does not work neither is setSubDescription().
And also how to add button overlays.

推荐答案

有一种方法可以做到这一点，它是 Marker 类的一个选择功能.查找示例的最简单方法是使用 LatLonGridOverlay.我将在下面将逻辑简化为易于理解的内容.关键是code的顺序，看标题，然后把icon设置为null，然后添加到地图中.您必须根据折线的坐标确定您希望标记的位置，但它确实有效.

There is a way to do it and it's an opt in feature of the Marker class. The easiest way to find an example is with the LatLonGridOverlay. I'll reduce the logic to something simple to understand below. The key is the order of code, see the title, then set the icon to null, then add to the map. You'll have to figure out where you want the Marker to be based on the coordinates of the polyline but it does work.

Polyline p = new Polyline();
List<GeoPoint> pts = new ArrayList<GeoPoint>();
//add your points here
p.setPoints(pts);

//add to map

Marker m = new Marker(mapView);
m.setTitle("Some text here");
//must set the icon last
m.setIcon(null);
m.setPosition(new GeoPoint(marker location here));

//add to map

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