【发布时间】:2015-01-23 09:43:17
【问题描述】:
我希望地图相机移动到我的 LatLngBounds。所以我将地图片段添加到BaseExpandableListAdapter 的getChildView 和onMapReady 的布局中,我将moveCamera 到LatLngBounds
@Override
public View getChildView(final int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
convertView = inflater.inflate(R.layout.event_child, parent, false);
GoogleMapOptions options = new GoogleMapOptions();
options.liteMode(true)
.compassEnabled(false)
.mapToolbarEnabled(false)
.rotateGesturesEnabled(false)
.tiltGesturesEnabled(false)
.scrollGesturesEnabled(false)
.zoomControlsEnabled(false)
.zoomGesturesEnabled(false);
SupportMapFragment mapFragment = SupportMapFragment.newInstance(options);
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.add(R.id.event_fragment_map, mapFragment, "event_fragment_map").commit();
mapFragment.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap;
moveMapAddBounds();
}
});
//...
}
private void moveMapAddBounds(){
mGoogleMap.addPolygon(new PolygonOptions().add(getLatLngBounds().southwest)
.add(new LatLng(getLatLngBounds().northeast.latitude, getLatLngBounds().southwest.longitude))
.add(getLatLngBounds().northeast)
.add(new LatLng(getLatLngBounds().southwest.latitude, getLatLngBounds().northeast.longitude))
);
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngBounds(getLatLngBounds(), 0));
}
public LatLngBounds getLatLngBounds() {
//random fake latlng and distance
LatLng from = new LatLng(51.1113564, 17.0041787);
double distance = 1717.906494140625;
return new LatLngBounds.Builder().
include(SphericalUtil.computeOffset(from, distance, 0)).
include(SphericalUtil.computeOffset(from, distance, 90)).
include(SphericalUtil.computeOffset(from, distance, 180)).
include(SphericalUtil.computeOffset(from, distance, 270)).build();
}
我正在根据http://googlemaps.github.io/android-maps-utils/ 计算边界,它似乎工作正常,因为在moveMapAddBounds 中添加到地图的矩形被添加到有效位置,但地图相机移动到几乎好的位置,除了它添加如图所示,要映射的随机 (?) 填充(矩形上下对称):
我观察到,对于特定的 LatLngBounds,这些填充始终相同,但它们在不同的 LatLngBounds 之间有所不同。
【问题讨论】:
标签: google-maps google-maps-android-api-2 android-maps-v2