java - 我的 map 上有 2 个标记。如何将相机聚焦在两者上而不只是将相机移动到其中一个？

Question

我在我的应用中实现了 Google map ，并在上面添加了 2 个标记。

方法如下:

LatLng mainUserLocation = new LatLng(Double.valueOf(currentLt), Double.valueOf(currentLn));
mMap.addMarker(new MarkerOptions().position(mainUserLocation).title("You"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(mainUserLocation))
mMap.animateCamera(CameraUpdateFactory.zoomTo(20), 2000, null);

LatLng otherPlayersLocation = new LatLng(currentLtAU, currentLnAU);
mMap.addMarker(new MarkerOptions().position(otherPlayersLocation).title(nameAU));

问题是摄像头正在缩放并聚焦在一个标记上，而另一个标记却看不见了!

我希望两个标记或所有标记都保持在视线范围内。如何实现？

请告诉我。

Answer 1

所以这个问题已经有答案了 here 并且不提及它会违反良好的社区道德。

Still, here I will try to break it down in your context. So that you understand better what steps you need to take.

LatLng mainUserLocation = new LatLng(Double.valueOf(currentLt), Double.valueOf(currentLn));

LatLng otherPlayersLocation = new LatLng(currentLtAU, currentLnAU);

    public void showMap() {

        mMap.clear();
        //Create your Markers List
        List<Marker> markersList = new ArrayList<Marker>();
        Marker youMarker = mMap.addMarker(new MarkerOptions().position(mainUserLocation).title("You"));
        Marker playerMarker = mMap.addMarker(new MarkerOptions().position(otherPlayersLocation).title(nameAU));

        //Add them to your list
        markersList.add(youMarker);
        markersList.add(playerMarker);


//get the latLngbuilder from the marker list
        builder = new LatLngBounds.Builder();
        for (Marker m : markersList) {
            builder.include(m.getPosition());
        }

//Bounds padding here
        int padding = 50;

        //Create bounds here
        LatLngBounds bounds = builder.build();

//Create camera with bounds
        cu = CameraUpdateFactory.newLatLngBounds(bounds, padding);

//Check map is loaded
        mMap.setOnMapLoadedCallback(new GoogleMap.OnMapLoadedCallback() {
            @Override
            public void onMapLoaded() {
                //animate camera here
                mMap.animateCamera(cu);

            }
        });


}

因此，在您的代码中，您需要设置这样的方法并调用 showMap()。

希望这些信息对您有所帮助。