Develop Reference

Disable scaling/increasing Polyline when zoom out/in the map

My app draws your route by adding Polylines. The user sets color, width and transparent. The only problem is that I dont want to change the size of polylines but when I zoom out or zoom in map then polyline's size change.
Anyone know how to disable that "size changing" function?

You can use
yourPolyLine.setWidth(yourIntegerValue)
For more detail of in google maps you can refer this link.
For to not scaling polyline in map when user zoom in/out, you have to set polyline width. To do this you can refer this link.

Draw an inverted circle on google map with specific radius android

I want to develop below picture in android, which is already implemented in iOS.
I know how to add circle on google map. but as shown in picture the color should be filled on map not on the circle, circle must be fully transparent.
i have referred many links but all of that put the simple overlay on map, so when user zoom in or zoom out the map; circle remains the same.
i have implemented simple circle around current location.
googleMap.addCircle(new CircleOptions()
.center(new LatLng(MyApplication.latitude, MyApplication.longitude))
.radius(800)
.fillColor(0x70ffffff))
.setStrokeWidth(0);
i want above functionality with inverse color. circle should be only around current location and the size should vary with zoom in and zoom out of map.
Thanks.

Google Maps with custom map in Android

Is there a way to display a custom map using the Google Maps API and draw polylines on it using (x, y) coordinates? I am not interested in geolocation, since I just want to create a demo scenario for an indoor navigation app.

Depending on your needs you can use Tile Overlays that allows you to load your own map using the tile engine of the map or Ground Overlays that draws a fixed image on a given coordinate.
As both are map overlays you can still draw polylines, polygons, markers, ... on the map

Android: how to zoom to a specific square in Skobbler maps

I need to display a polyline and want to center the map on this polyline. How to zoom to a specific square consisting of two latitudes and two longitudes in Skobbler maps?

Create an SKBoundingBox from the 2 coordinates and then "fit" the visible screen to that bounding box via fitBoundingBox

What is a map tile?

I read the google android api and was confused about what a map tile is as the api described how google map handles "downloading map tiles".
(Src)-https://developers.google.com/maps/documentation/android/map. Can someone give a quick overview of what a map tile is. Just a section of the map that fits a device screen?

The section of the map that is rendered on the device screen can consist of many tiles. Basically, the map is segmented into multiple tiles based on the zoom level.
From OpenStreetMap-Wiki:
square bitmap graphics displayed in a grid arrangement to show a map.
From Google Maps Android API:
The Google Maps API breaks up the imagery at each zoom level into a
set of square map tiles arranged in a grid. When a map moves to a new
location, or to a new zoom level, the Maps API determines which tiles
are needed and translates that information into a set of tiles to
retrieve.
The tile with coordinates (0,0) is always at the northwest corner of
the map, with x values increasing from west to east and y values
increasing from north to south. Tiles are indexed using x,y
coordinates from that origin.
At zoom level 0, the entire world is rendered in a single tile. Each
zoom level increases the magnification by a factor of two. So, at zoom
level 1 the map will be rendered as a 2x2 grid of tiles. At zoom level
2, it's a 4x4 grid. At zoom level 3, it's an 8x8 grid, and so on.
Bing Maps Tile System: