Google地图精简模式将相机移动到经纬度边界会添加不需要的地图填充 [英] Google Map Lite Mode moveCamera to lat lng bounds adds unwanted map padding
问题描述
我想让地图相机移动到我的LatLngBounds。因此,我在 BaseExpandableListAdapter
的 getChildView
和 onMapReady $ c中添加了地图片段$ c>我将
moveCamera
改为 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() .south)
.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(){
//随机伪造的latlng和距离
LatLng from = new LatLng(51.1113564,17.0041787);
double distance = 1717.906494140625;
返回新的LatLngBounds.Builder()。
包括(SphericalUtil.computeOffset(from,distance,0))。
包括(SphericalUtil.computeOffset(from,距离,90))。
包括(SphericalUtil.computeOffset(from,distance,180))。
include(SphericalUtil.computeOffset(from,distance,270))。build();
}
我按照
I want map camera to move to my LatLngBounds. So I add map fragment to layout in BaseExpandableListAdapter
's getChildView
and onMapReady
I'll moveCamera
to 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();
}
I'm calculating bounds according to http://googlemaps.github.io/android-maps-utils/ and it seems to work OK as the rectangle added to map in moveMapAddBounds
is added in valid positions but the map camera is moved to almost good position with the exception that it adds a random (?) paddings to map (symmetric above and below the rectangle) as seen on picture:
I've observed that those paddings are always the same for a particular LatLngBounds but they differ between different LatLngBounds.
The reason was I used Lite Mode where only integer zooms are available.
这篇关于Google地图精简模式将相机移动到经纬度边界会添加不需要的地图填充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IT屋!