绘制5透明外接圆上的谷歌地图V2 [英] Draw five transparent circumcircles on the Google Map v2
问题描述
我最近已经开始与谷歌地图V2工作，想通了很多事情已经改变。 previously我用谷歌地图V1，所以我是用图形页面的概念。
I have recently started working with Google Map v2 and figured it out lot of things have been changed. Previously I was using Google Map v1 so I was using the concept of MapView.
我想创建五类透明外接圆与中心为我现在的位置。下面是code，我使用了谷歌地图V1 绘制圆，这是工作对我罚款。现在，我想画，我画我的跌破code。在谷歌地图V2 同一个圆。因为我使用的GoogleMap的位置反对我不能使用图形页面在这里。任何人都可以帮我这个与中心借鉴了谷歌地图V2圆我的当前位置
I am trying to create five transparent circumcircles with the center as my current location. Below is the code, I was using for Google Map v1 to draw the circle and it was working fine for me. Now I am trying to draw the same circle that I have drawn in my below code on the Google Map v2. I cannot use MapView here as I am using GoogleMap object here. Can anyone help me with this to draw the circle on the Google Map v2 with center as my current location
@Override
public void onLocationChanged(Location location) {
if (location != null) {
GeoPoint point = new GeoPoint(
(int) (location.getLatitude() * 1E6),
(int) (location.getLongitude() * 1E6));
// Create a LatLng object for the current location
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
// Show the location on the Google Map
googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
// Zoom in the Google Map
googleMap.animateCamera(CameraUpdateFactory.zoomTo(15));
// Below is the code for Google Map v1 to draw the circle on the map
// if (mapOverlay == null) {
// mapOverlay = new MapOverlay(this, R.drawable.mark_blue);
// List<Overlay> listOfOverlays = mapView.getOverlays();
// listOfOverlays.add(mapOverlay);
// }
// mapOverlay.setPointToDraw(point);
// mapView.invalidate();
}
}
延伸覆盖，并画上了谷歌地图的圆圈V1
A simple class that extends Overlay and draw the circle on the Google Map v1
class MapOverlay extends Overlay {
private GeoPoint pointToDraw;
int[] imageNames = new int[6];
// This is the cached Point on the screen that will get refilled on
// every draw
private Point mScreenPoints;
// This is the cached decoded bitmap that will be drawn each time
private Bitmap mBitmap;
// Cached Paint
private Paint mCirclePaint;
public MapOverlay(ProximityLocationListener gpsLocationListener,
int currentUser) {
imageNames[0] = currentUser;
imageNames[1] = R.drawable.tenm;
imageNames[2] = R.drawable.twentym;
imageNames[3] = R.drawable.thirtym;
imageNames[4] = R.drawable.fourtym;
imageNames[5] = R.drawable.fiftym;
// This only needs to be made here, once. It never needs to change.
mCirclePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mCirclePaint.setColor(0x10000000);
mCirclePaint.setStyle(Style.FILL_AND_STROKE);
// We only need to load this image once and then just keep drawing
// it when dirtyed.
mBitmap = BitmapFactory.decodeResource(getResources(),
imageNames[0]);
// This Point object will be changed every call to toPixels(), but
// the instance can be recycled
mScreenPoints = new Point();
}
public void setPointToDraw(GeoPoint point) {
pointToDraw = point;
}
public GeoPoint getPointToDraw() {
return pointToDraw;
}
@Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow,
long when) {
super.draw(canvas, mapView, shadow);
mScreenPoints = mapView.getProjection().toPixels(pointToDraw,
mScreenPoints);
int totalCircle = 5;
int radius = 40;
int centerimagesize = 13;
for (int i = 1; i <= totalCircle; i++) {
canvas.drawCircle(mScreenPoints.x + 18, mScreenPoints.y + 36, i
* radius, mCirclePaint);
canvas.drawBitmap(BitmapFactory.decodeResource(getResources(),
imageNames[i]), ((mScreenPoints.x) + (i * radius)),
(mScreenPoints.y), null);
}
canvas.drawBitmap(mBitmap,
(mScreenPoints.x - (centerimagesize / 2)),
(mScreenPoints.y - (centerimagesize / 2)), null);
super.draw(canvas, mapView, shadow);
return true;
}
}
我只需要画，我画中的谷歌地图V2我上面code中的同一个圆。有什么办法，我可以用上面的code与GoogleMap的对象，这样我就可以在谷歌地图V2画圈圈？
I just need to draw the same circle that I have drawn in my above code on the Google Map v2. Is there any way, I can use the above code with GoogleMap object so that I can draw circles on the Google Map v2?
感谢您的帮助。
更新code： -
我需要考虑当前位置为圆心画上的谷歌地图V2 5圆圈圈。这意味着每个五界的具有相同的中心，但具有不同半径：所述第一圆将具有半径10米，20米第二圆半径，为30m第三圆半径，40米第四圆半径，以及50μm的第五圆半径。我使用谷歌地图V2。
I need to draw five circle-circle on the Google Maps v2 by taking the current location as the center of a circle. Meaning that each of the five circles have the same center but with different radii: the first circle will have radius of 10m, second circle radius of 20m, third circle radius of 30m, fourth circle radius of 40m, and fifth circle radius of 50m. I am using Google Maps v2.
和我需要表现出的圆心标记为好。
And I need to show a marker on the center of the circle as well.
我想这样的事情画上的谷歌地图V2圈，但它绘制只有一个圈子，而不是五circum圈
I am trying something like this to draw the circle on the Google Map v2 but it draws only one circle and not the five circum-circle
CircleOptions circleOptions = new CircleOptions()
.center(latLng) //set center
.radius(500) //set radius in meters
.fillColor(Color.TRANSPARENT) //default
.strokeColor(0x10000000)
.strokeWidth(5);
myCircle = googleMap.addCircle(circleOptions);
我需要精确地绘制circum圈这样的 -
I need to draw circum-circle exactly like this-
任何人可以帮助我呢？我在做这个圈子里的谷歌地图V2有问题。任何帮助将AP preciated。
Can anybody help me with this? I am having problem in making this circle in Google Map v2. Any help will be appreciated.
推荐答案
只使用一个圆圈添加到地图 googleMap.addCircle（...）
Just add a circle to the map using googleMap.addCircle(...)
看文档
更新：
我没有完全按照我说的做，我有没有问题，做你想做什么
I did exactly as I said to do and I had no problem doing what you want
这里是code，超简单超基本....
here is the code, super simple super basic....
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View view = super.onCreateView(inflater, container, savedInstanceState);
GoogleMap map = getMap();
int radius = 500;
for(int i=0; i<5; i++){
map.addCircle(new CircleOptions().center(new LatLng(0,0)).radius(radius).fillColor(0x30000000).strokeWidth(3));
radius += 500;
}
return view;
}
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