android - 通过OnPolylineClickListener更改多条折线的颜色

Question

我在谷歌地图中有多条折线。当用户单击每条折线时，它必须将其颜色更改为蓝色，其他折线应为灰色。

我已将折线添加到列表中，如下所示...

polylinePaths = new ArrayList<>();

polylinePaths.add(mMap.addPolyline(polylineOption1));
polylinePaths.add(mMap.addPolyline(polylineOption2));
polylinePaths.add(mMap.addPolyline(polylineOption3));

通过使用 OnPolylineClickListener 我尝试处理每条折线，但无法做到这一点..

mMap.setOnPolylineClickListener(new GoogleMap.OnPolylineClickListener()
    {
        @Override
        public void onPolylineClick(Polyline polyline)
        {

        }
    });

我的方法正确吗？有人可以帮忙完成这项任务吗？

Answer 1

您可以使用Polyline.setZindex()为此:例如，将 Z-index 设置为 1f(对于未单击的折线)，并将 Z-index 设置为大于 1f(例如 2f)对于点击的。类似这样的事情:

mGoogleMap.setOnPolylineClickListener(new GoogleMap.OnPolylineClickListener() {
    @Override
    public void onPolylineClick(Polyline polyline) {
        // set settings (color, z-index) for all polylines
        polyline1.setColor(Color.RED);
        polyline1.setZIndex(1f);

        polyline2.setColor(Color.RED);
        polyline2.setZIndex(1f);

        polyline3.setColor(Color.RED);
        polyline3.setZIndex(1f);

        // set settings (color, z-index) for CLICKED polyline
        polyline.setColor(Color.BLUE);
        polyline.setZIndex(2f);
    }
});

其中polyline1、polyline2和polyline3是:

final List<LatLng> poly1Points = new ArrayList<>();
poly1Points.add(new LatLng(-35.27801,149.12958));
poly1Points.add(new LatLng(-35.28032,149.12907));
poly1Points.add(new LatLng(-35.28099,149.12929));
poly1Points.add(new LatLng(-35.28144,149.12984));
poly1Points.add(new LatLng(-35.28194,149.13003));
poly1Points.add(new LatLng(-35.28282,149.12956));
poly1Points.add(new LatLng(-35.28302,149.12881));
poly1Points.add(new LatLng(-35.28473,149.12836));

PolylineOptions polylineOptions1 = new PolylineOptions()
        .addAll(poly1Points)
        .color(Color.RED)
        .width(20);

final List<LatLng> poly2Points = new ArrayList<>();
poly2Points.add(new LatLng(-35.279472, 149.124717));
poly2Points.add(new LatLng(-35.280146, 149.125908));
poly2Points.add(new LatLng(-35.280453, 149.126380));
poly2Points.add(new LatLng(-35.281775, 149.125286));
poly2Points.add(new LatLng(-35.284245, 149.126649));
poly2Points.add(new LatLng(-35.284604, 149.129814));
poly2Points.add(new LatLng(-35.283395, 149.131209));
poly2Points.add(new LatLng(-35.285576, 149.134964));

PolylineOptions polylineOptions2 = new PolylineOptions()
        .addAll(poly2Points)
        .color(Color.RED)
        .width(20);

final List<LatLng> poly3Points = new ArrayList<>();
poly3Points.add(new LatLng(-35.284211, 149.123073));
poly3Points.add(new LatLng(-35.283624, 149.124586));
poly3Points.add(new LatLng(-35.281750, 149.123610));
poly3Points.add(new LatLng(-35.278711, 149.126163));
poly3Points.add(new LatLng(-35.278107, 149.126345));
poly3Points.add(new LatLng(-35.278536, 149.130626));
poly3Points.add(new LatLng(-35.278737, 149.131484));
poly3Points.add(new LatLng(-35.279516, 149.132031));
poly3Points.add(new LatLng(-35.281478, 149.133179));
poly3Points.add(new LatLng(-35.281478, 149.133179));

PolylineOptions polylineOptions3 = new PolylineOptions()
        .addAll(poly3Points)
        .color(Color.RED)
        .width(20);

final Polyline polyline1 = mGoogleMap.addPolyline(polylineOptions1);
polyline1.setClickable(true);

final Polyline polyline2 = mGoogleMap.addPolyline(polylineOptions2);
polyline2.setClickable(true);

final Polyline polyline3 = mGoogleMap.addPolyline(polylineOptions3);
polyline3.setClickable(true);

并且不要忘记对所有多段线.setClickable(true)。结果你应该得到类似的东西(点击的折线是蓝色的，位于顶部):