问题描述
我有点困惑,因为代码看起来一切都好。
问题是折线不会显示在地图上。
以下是我在每次接收到位置时调用折线的函数
(我以类似的方式添加了标记,并且它们工作得很好)
> Polyline 需要多个点!例如,传递 ArrayList< LatLng> 添加到您的方法中,并使用 addAll(),而不仅仅是 add()。
$ p $ PolylineOptions 文档: LatLng ... points):将顶点添加到正在构建的多段线的末端。
或者,您可以保留对 Polyline 并使用 add()在您收到它时添加点。
将poly添加为实例变量在你的课堂上:
PolylineOptions poly;
然后在 onCreate()你设置了地图):
pre $ code poly = new PolylineOptions()
.color(Color.BLUE)
.width(5)
.visible(true)
.zIndex(30);
googleMap.addPolyline(poly);
然后当您收到更多积分时:
poly.add(newLoc);
I am a little bit confused since everything seems to be alright with the code.The problem is that the polyline won't show up on the map.
Here is the function that I call to place polyline everytime I receive a location
(I added markers in a similar way and they work great)
private void addPolylineLocationOnMap(LatLng newLoc) { PolylineOptions poly = new PolylineOptions() .add(newLoc) .color(Color.BLUE) .width(5) .visible(true) .zIndex(30); googleMap.addPolyline(poly); }
A Polyline needs multiple points!
For example, pass an ArrayList<LatLng> to your method and use addAll() rather than just add().
From the PolylineOptions documentation:
add(LatLng... points) : Adds vertices to the end of the polyline being built.
Alternatively, you can keep a reference to one Polyline and use add() to add points to it as you receive them.
Add poly as an instance variable in your class:
PolylineOptions poly;
Then in onCreate() (or wherever you set up the map):
poly = new PolylineOptions() .color(Color.BLUE) .width(5) .visible(true) .zIndex(30); googleMap.addPolyline(poly);
Then as you receive more points:
poly.add(newLoc);
这篇关于Polyline不可见Android Maps Api v2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!