Google maps - camera position with marker at bottom - android

If you look at google navigation, it always keeps the driver marker close to bottom and when you move the camera it offers to reset it back to bottom. I'm wondering how to achieve the same thing given a marker.
There was a similar question before, but the offered answers do not consider the map to be tilted which results in wrong projection.

The current location marker always to bottom of the screen while moving also. For that we have to set
map.setPadding(0,320,0,0);
So, we set pdding top to the map 320 then it takes some space from the top of the screen.
In your final code like this
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(newLatLng)
.zoom(18)
.bearing(0)
.tilt(0)
.build();
map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
map.setPadding(0,320,0,0);

Nima, there are different way to achieve this behaviour by tweaking values in camera positions.
For instance you have 2 geo location latlng information available with you, UserLocation and DestinationLocation find the midpoint of this location and set the camera target at it. And then you can move the camera to zoom level which cover both geolocation with proper padding of top and bottom by specifying the bearing value.
//First build the bounds using the builder
LatLngBounds.Builder builder = new LatLngBounds.Builder();
LatLngBounds bounds;
builder.include(userLocation);
builder.include(destinationLocation);
bounds = builder.build();
// define value for padding
int padding =20;
//This cameraupdate will zoom the map to a level where both location visible on map and also set the padding on four side.
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds,padding);
mMap.moveCamera(cu);
// now lets make the map rotate based on user location
// for that we will add the bearing to the camera position.
//convert latlng to Location object
Location startLocation = new Location("startingPoint");
startLocation.setLatitude(userLocation.latitude);
startLocation.setLongitude(userLocation.longitude);
Location endLocation = new Location("endingPoint");
endLocation.setLatitude(destinationLocation.latitude);
endLocation.setLongitude(destinationLocation.longitude);
//get the bearing which will help in rotating the map.
float targetBearing = startLocation.bearingTo(endLocation);
//Now set this values in cameraposition
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(bounds.getCenter())
.zoom(mMap.getCameraPosition().zoom)
.bearing(targetBearing)
.build();
mMap.moveCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));

Related

Rotate google map according to bearing with fix marker in center

I am trying to implement google maps in my application.
Requirement:
While driving my marker icon should be fixed in center of screen (facing towards north always) while the map should move left right bottom and rotate when user turn on a street.
How I am trying to do it as
googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(position, 5));
float bearing = getBearing(Lastposition,newPosition);
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(newPosition)
.zoom(15)
.bearing(bearing)
.tilt(0)
.build();
googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
public static float getBearing(LatLng from, LatLng to) {
Location fromLocation = new Location("");//provider name is unnecessary
fromLocation.setLatitude(from.latitude);
fromLocation.setLongitude(from.longitude);
Location toLocation = new Location("");//provider name is unnecessary
toLocation.setLatitude(to.latitude);
toLocation.setLongitude(to.longitude);
Log.i("Bearing",fromLocation.bearingTo(toLocation)+"");
return fromLocation.bearingTo(toLocation);
}
Results:
Marker moves on the path but camera itself does not move according to driver turns on streets. I hope i was able to make things understandable.Please help out what can be issue or better solution for it.Thanks

Set CameraPosition to my location, but show other markers also

I am designing an Android app that should show multiple markers on map. I can do that easily. My problem is that I need to show all the markers around my position, and the CameraPosition needs to be in focused in my position. I can easily do each on them separately, but what I need is showing them together, my location in the middle of the map, and the markers around my location.
Any idea how can I achieve that? Thanks in advance!
Set your zoom to a higher level so it can zoom out and see more of your map around your current location.
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(yourLatLng).zoom(12).build();
googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
The Functionality you need is to keep all the selected markers on the maps and it it should be visible at a single time. you have to keep all those points in the visible region with myLlocation (your current location) at the center of the screen always.
First keep your myLocation inside an latlng variable and all the other latlng which are to be inside the bounds inside another ArrayList of LatLng. Also define some variables to keep track of operation.
LatLng myLocation=null;
ArrayList<LatLng> latlngs = null; // the arraylist of other latlng;
boolean are_all_inside_viewport = false;
float current_zoom = googleMap.getCameraPosition().zoom;
//initialise these variables myLocation and latlngs;
Then animate your camera to myLocation which will be placed into the center of the map. put a low zoom level here.
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(myLocation)
.zoom(14)
.build();
googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
Now check for each latlng in the ArrayList of they are in the google maps view port. if they are inside then its ok. if not then decrease a zoom level of the maps and animate the camera again.
while (!are_all_inside_viewport) {
are_all_inside_viewport = true;
for (LatLng latLng : latlngs) {
if (!bounds.contains(latLng)) {
are_all_inside_viewport = false;
break;
}
}
bounds = googleMap_local.getProjection().getVisibleRegion().latLngBounds;
cameraPosition = new CameraPosition.Builder()
.target(myLocation)
.zoom(current_zoom - 1)
.build();
googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
}
This will go on checking for each latlng inside the ArrayList until all the latlng are inside the viewport.
Hope this answer helps you.

Getting particular location of google map in center in android studio

I used this code to get particular location in center.
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(33.7167, 73.0667), 4))
It worked somehow but after putting 30 no of markers simultaneously. I didn't get location in center.
this is my snippet of code
http://i.stack.imgur.com/jvATG.png
http://i.stack.imgur.com/RPsNx.png
http://i.stack.imgur.com/ImmD8.png
http://i.stack.imgur.com/a930b.png
You can update camera to the center of bounds of markers. For that -
Create LatLngBounds.Builder object and add all the markers in it.
LatLngBounds.Builder builder = new LatLngBounds.Builder();
While adding marker store it to variable like
Marker marker1 = mMap.addMarker(....);
Marker marker2 = mMap.addMarker(....);
Then add all markers in it using
builder.include(marker1.getPosition());
builder.include(marker2.getPosition());
Then build LatLngBounds
LatLngBounds bounds = builder.build();
Then create CameraUpdate and animate camera to relative position
int padding = 0; // offset from edges of the map in pixels
CameraUpdate camUpdate = CameraUpdateFactory.newLatLngBounds(bounds, padding);
mMap.animateCamera(camUpdate);
And done.
Refer this answer for more details.
Hope it'll work.

How to apply Camera bounds with CameraPosition in google map

I need to use few features of both CameraPosition and CameraBounds, Like my specific requirement is to move the camera on a bearing and tilt it on a few degrees as well as there are other markers on the map which i want to cover while i perform a camera update .
CameraUpdateFactory class have two different methods on two different purpose.
1) newCameraPosition 2) newLatLngBounds
But i doubt if i can use both of them simultaneously to get the result i want.
CameraPosition works as below :
LatLng current_lat_lng=new LatLng(lat, lon);
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(current_lat_lng) // Sets the center of the map to Mountain View
.zoom(googleMap.getCameraPosition().zoom) // Sets the zoom
.bearing((float)mapHeading) // Sets the orientation of the camera to a bearing
.tilt(0) // Sets the tilt of the camera to 0 degrees
.build();
googleMap.moveCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
CameraBounds work as below :
final LatLngBounds.Builder builder = new LatLngBounds.Builder();
if (marker_Searched != null) {
builder.include(marker_Searched.getPosition());
}
if (marker_selected_taxi != null) {
builder.include(marker_selected_taxi.getPosition());
}
LatLngBounds bounds = builder.build();
int padding = 300; // offset from edges of the map in pixels
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, padding);
googleMap.moveCamera(cu);
Do anyone have tried any workaround with this ?
Animate your camera to the LatLngBounds with CancellableCallback, then in onFinish get zoom value (map.getCameraPosition().zoom) then apply this value into CameraPosition. It works for me fine.

Fix zoom level between two Marker in Google-Map

Currently I work with Google-Map-v2 and I want to show Direction between two Markers. Everything is ok and direction between two Markers calculate and draw fine.But only one problem is remain.
The problem is Zoom level between these two markers in Google-Map is too much. I Search in SO and find a solution for changing Zoom Level by Following code :
LatLngBounds.Builder builder = new LatLngBounds.Builder();
builder.include(origin);
builder.include(dest);
LatLngBounds bounds = builder.build();
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, 50);
mMap.animateCamera(cu);
Now it's better But still zoom level is not good. Is it possible to do some fixes on Code ? ( if I can some padding to view is fixed )
I Also change 50 to 6,12,... But nothing changed.
You are using the correct code, and the value (50) needs to be increased if you want to zoom less (be outer) or decreased to 0 if you want to be in the smallest area containing the two markers (you can skip the value in case).
If you set a value of 150 or more, and the level is too much you can use the animation callback to zoom out after the LatLng zoom:
Google API
com.google.android.gms.maps.GoogleMap.CancelableCallback)
LatLngBounds.Builder builder = new LatLngBounds.Builder();
builder.include(origin);
builder.include(dest);
LatLngBounds bounds = builder.build();
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, 50);
mMap.animateCamera(cu, new GoogleMap.CancelableCallback(){
void onCancel(){}
void onFinish(){
CameraUpdate zout = CameraUpdateFactory.zoomBy(-3.0);
mMap.animateCamera(zout);
}
});
This should zoom to the LatLng and when finished, zoom back of 3 levels.
try this:
CameraPosition cameraPosition =
new CameraPosition.Builder()
.target(yourlatlng)
// .bearing(targetBearing)// you can ignore it
.zoom(12)// your zoom value
// .tilt(40) // angle of view
.build();
mMap.animateCamera(
CameraUpdateFactory.newCameraPosition(cameraPosition),
500,
null);

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