我有一个随机纬度和经度点的列表,我正在绘制它们之间的路线。我的问题是如何在谷歌地图中绑定这条路线我在实用方法
下面public static void drawRouteIntoMap(final List<? extends MapHelper> position, final GoogleMap googleMap) {
/*List<MapHelper> position = new ArrayList<MapHelper>();
for (int i = lastPosition; i < maps.size(); i++) {
position.add(maps.get(i));
}*/
if (position.size() > 0 && Validator.isNotNull(googleMap)) {
googleMap.clear();
List<PolylineOptions> polylineOptionses = new ArrayList<PolylineOptions>();
PolylineOptions option = null;
Boolean lastPause = null;
for (MapHelper map : position) {
if (map.isPause()) {
if (Validator.isNull(lastPause) || !lastPause) {
option = new PolylineOptions().width(5).color(Color.rgb(255, 0, 155)).geodesic(true);
polylineOptionses.add(option);
}
option.add(new LatLng(map.getLatitude(), map.getLongitude()));
} else {
if (Validator.isNull(lastPause) || lastPause) {
option = new PolylineOptions().width(5).color(Color.rgb(0, 179, 253)).geodesic(true);
polylineOptionses.add(option);
}
option.add(new LatLng(map.getLatitude(), map.getLongitude()));
}
lastPause = map.isPause();
}
for (PolylineOptions options : polylineOptionses) {
googleMap.addPolyline(options);
}
if(Validator.isNotNull(option)){
//List<LatLng> points = option.getPoints();
final LatLngBounds.Builder mapBounds = new LatLngBounds.Builder();
googleMap.setOnMapLoadedCallback(new GoogleMap.OnMapLoadedCallback() {
@Override
public void onMapLoaded() {
LatLng startPoint = new LatLng(position.get(0).getLatitude(), position.get(0).getLongitude());
googleMap.addMarker(new MarkerOptions().position(startPoint).title("start").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)));
mapBounds.include(startPoint);
LatLng endPoint = new LatLng(position.get(position.size() - 1).getLatitude(), position.get(position.size() - 1).getLongitude());
mapBounds.include(endPoint);
googleMap.addMarker(new MarkerOptions().position(endPoint).title("finish").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
googleMap.moveCamera(CameraUpdateFactory.newLatLngBounds(mapBounds.build(), 10));
/* googleMap.animateCamera(CameraUpdateFactory.newLatLngBounds(mapBounds.build(), 10));
googleMap.moveCamera(CameraUpdateFactory.zoomOut());*/
}
});
}
}
}
此处最后一次暂停是布尔值,表示它是否是用于指示红色折线的暂停点。
但它不起作用。感谢任何帮助。
答案 0 :(得分:22)
尝试以这种方式实施
googleMap.setPadding(left, top, right, bottom);
<强>更新强>
查看图像后,地图上方有布局。因此,需要您设置可变填充。你可以这样做
routePadding = 0
注意:设置变量填充时,可以初始化left = right = 10
;
在您的情况下,近似值为:bottom=100
,top=200
,Recommendation: You can calculate the height of those (top and bottom) layouts in pixels and then set padding accordingly.
。设置完成后,您可以根据自己的要求校准。
$('p a').replaceWith(function() {
return document.createTextNode($(this).text())
})
答案 1 :(得分:6)
为什么放大不起作用的原因可能是因为在调用方法时地图尚未膨胀:
moveCamera(com.google.android.gms.maps.CameraUpdate)
尝试将ViewTreeObserver.OnGlobalLayoutListener
添加到地图中:
ViewTreeObserver vto = googleMap.getViewTreeObserver();
ViewTreeObserver.OnGlobalLayoutListener globalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
googleMap.getViewTreeObserver().removeOnGlobalLayoutListener(this);
} else {
googleMap.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
googleMap.moveCamera(CameraUpdateFactory.newLatLngBounds(mapBounds.build(), 10));
}
};
vto.addOnGlobalLayoutListener(globalLayoutListener);
如果上述方法不起作用GoogleMap
有自己的布局侦听器,您可以使用:
googleMap.setOnCameraChangeListener(new OnCameraChangeListener() {
@Override
public void onCameraChange(CameraPosition arg0) {
googleMap.moveCamera(CameraUpdateFactory.newLatLngBounds(mapBounds.build(), 10));
googleMap.setOnCameraChangeListener(null);
}
});
但是,从play-services-maps 9.4.0版本的API开始,不推荐使用上述方法。使用以下之一:
答案 2 :(得分:4)
您需要将构成折线的所有点都包含在mapBounds
对象中。
此外,您正在使用animateCamera
更新相机,然后使用moveCamera
移动相机。第二次摄像头更新会覆盖第一次。只需删除该行
googleMap.moveCamera(CameraUpdateFactory.zoomOut());
这条线也是必需的(你不需要移动和动画相机,只需其中一个):
googleMap.moveCamera(CameraUpdateFactory.newLatLngBounds(mapBounds.build(), 10));
如果您需要缩小地图,可以使用CameraUpdateFactory.newLatLngBounds
方法的填充参数进行播放。
答案 3 :(得分:3)
我实施了一个类似于@ rishabh-dutt-sharma的解决方案,其中有几个曲折:
这是代码(改编自原始代码,我希望没有拼写错误):
public void zoomRoute(GoogleMap googleMap, List<LatLng> lstLatLngRoute) {
if (googleMap == null || lstLatLngRoute == null || lstLatLngRoute.isEmpty()) return;
LatLngBounds currentLatLongBounds =
googleMap.getProjection().getVisibleRegion().latLngBounds;
boolean updateBounds = false;
for (LatLng latLng : lstLatLngRoute) {
if (!currentLatLongBounds.contains(latLng)) {
updateBounds = true;
}
}
if (updateBounds) {
CameraUpdate cameraUpdate;
if (lstLatLngRoute.size() == 1) {
LatLng latLng = lstLatLngRoute.iterator().next();
cameraUpdate = CameraUpdateFactory.newLatLng(latLng);
} else {
LatLngBounds.Builder builder = LatLngBounds.builder();
for (LatLng latLng : lstLatLngRoute) {
builder.include(latLng);
}
LatLngBounds latLongBounds = builder.build();
cameraUpdate =
CameraUpdateFactory.newLatLngBounds(latLongBounds, MAP_ZOOM_PADDING);
}
try {
googleMap.animateCamera(cameraUpdate, MAP_CAMERA_ANIMATION_DURATION_IN_MILLIS,
new GoogleMap.CancelableCallback() {
@Override
public void onFinish() {
}
@Override
public void onCancel() {
}
});
} catch (IllegalStateException ex) {
// Ignore it. We're just being a bit lazy, as this exception only happens if
// we try to animate the camera before the map has a size
}
}
}
答案 4 :(得分:2)
var customerNameDict = ["firstName":"karthi","LastName":"alagu","MiddleName":"prabhu"];
var clientNameDict = ["firstName":"Selva","LastName":"kumar","MiddleName":"m"];
var employeeNameDict = ["firstName":"karthi","LastName":"prabhu","MiddleName":"kp"];
var attributeValue = "karthi";
var arrNames:Array = [customerNameDict,clientNameDict,employeeNameDict];
var namePredicate =NSPredicate(format: "firstName like %@",attributeValue);
let filteredArray = arrNames.filter { namePredicate.evaluateWithObject($0) };
println("names = ,\(filteredArray)");
如果有帮助,请尝试
答案 5 :(得分:2)
你可以做一件事,找出2纬度和经度之间的距离,并检查你得到的距离。看,它是如何工作的。 这可能对你有用。
googleMap.moveCamera(CameraUpdateFactory.newLatLng(reachLocationLatLng));
if (dist > 2 && dist <= 5) {
googleMap.animateCamera(CameraUpdateFactory.zoomTo(13.0f));
mapZoomLevel = 12;
} else if (dist > 5 && dist <= 10) {
googleMap.animateCamera(CameraUpdateFactory.zoomTo(12.0f));
mapZoomLevel = 11;
} else if (dist > 10 && dist <= 20) {
googleMap.animateCamera(CameraUpdateFactory.zoomTo(11.0f));
mapZoomLevel = 11;
} else if (dist > 20 && dist <= 40) {
googleMap.animateCamera(CameraUpdateFactory.zoomTo(10.0f));
mapZoomLevel = 10;
} else if (dist > 40 && dist < 100) {
googleMap.animateCamera(CameraUpdateFactory.zoomTo(9.0f));
mapZoomLevel = 9;
} else if (dist > 100 && dist < 200) {
googleMap.animateCamera(CameraUpdateFactory.zoomTo(8.0f));
mapZoomLevel = 8;
} else if (dist > 200 && dist < 400) {
googleMap.animateCamera(CameraUpdateFactory.zoomTo(7.0f));
mapZoomLevel = 7;
} else if (dist > 400 && dist < 700) {
googleMap.animateCamera(CameraUpdateFactory.zoomTo(6.0f));
mapZoomLevel = 7;
} else if (dist > 700 && dist < 1000) {
googleMap.animateCamera(CameraUpdateFactory.zoomTo(5.0f));
mapZoomLevel = 6;
} else if (dist > 1000) {
googleMap.animateCamera(CameraUpdateFactory.zoomTo(4.0f));
mapZoomLevel = 5;
} else {
googleMap.animateCamera(CameraUpdateFactory.zoomTo(14.0f));
mapZoomLevel = 14;
}
谢谢希望这会对你有所帮助。
答案 6 :(得分:0)
我是怎么做到的。
Android - plotting gps coordinate on custom map
是的,您可以绘制不在可见地图上的点。通过设置LatLngBounds来解决这个问题。然后显示LatLngBounds的地图。您还可以移动地图以显示LatLngBounds。没有什么棘手的东西没有切线或斜坡或地球的双曲曲率。所有这些都以度为单位来处理,所以不要过分考虑你的解决方案。如果你转动地图,点将随之转动。因此,将您的点添加到地图中找到边界并倾斜相机。向后倾斜相机,所有点仍然在屏幕上!这将使您开始使用屏幕上的所有点。
相同的示例获得对谷歌地图的引用。
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the
// map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
// mMap = mMapFragment.getMap();
// // Check if we were successful in obtaining the map.
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map)).getMap();
// use the settings maptype
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
让我们开始寻找地图的边界。
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.LatLngBounds;
A field for LatLngBounds and a LatLngBounds.Builder
private LatLngBounds bounds;
private LatLngBounds.Builder myLatLngBuilder;
initialize the LatLngBounds.Builder
myLatLngBuilder = new LatLngBounds.Builder();
for each point on your map.
LatLng myLatLng = new LatLng(latitude, longitude);
myLatLngBuilder.include(myLatLng);
Then when your finished adding points build your boundary.
bounds = myLatLngBuilder.build();
Now I have the bounds of all the points on my map and I can display just that area of the map. This code I lifted from the map samples.
final View mapView = getSupportFragmentManager().findFragmentById(
R.id.map).getView();
if (mapView.getViewTreeObserver().isAlive()) {
mapView.getViewTreeObserver().addOnGlobalLayoutListener(
new OnGlobalLayoutListener() {
@SuppressWarnings("deprecation")
// We use the new method when supported
@SuppressLint("NewApi")
// We check which build version we are using.
@Override
public void onGlobalLayout() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
mapView.getViewTreeObserver()
.removeGlobalOnLayoutListener(this);
} else {
mapView.getViewTreeObserver()
.removeOnGlobalLayoutListener(this);
}
mMap.moveCamera(CameraUpdateFactory
.newLatLngBounds(bounds, 50));
}
});
}
答案 7 :(得分:0)
现在回答很晚 尝试用这种最短的方式
首先获取当前位置latlongs然后获取目标lat long的写入代码,然后使用此代码计算当前位置和目标位置之间的距离
private double distance(double lat1, double lon1, double lat2, double lon2) {
double theta = lon1 - lon2;
double dist = Math.sin(deg2rad(lat1)) * Math.sin(deg2rad(lat2)) + Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * Math.cos(deg2rad(theta));
dist = Math.acos(dist);
dist = rad2deg(dist);
dist = dist * 60 * 1.1515;
return (dist);
}
private double deg2rad(double deg) {
return (deg * Math.PI / 180.0);
}
private double rad2deg(double rad) {
return (rad * 180.0 / Math.PI);
}
由于距离当前位置95米的GPS数量显示当前位置引脚或纬度较长的数据,因此您永远无法获得相同的lat long数据。 要么你是同一个地方你永远找不到确切的lat长数据,这必须有不同的点数,这样你需要将当前位置与你的修复lat长数据点保持距离。
当你发现&#34; 距离&#34;从你的目的地点到当前lat长,然后激活此代码以动画相机和缩放。
map.moveCamera( CameraUpdateFactory.newLatLngZoom(new LatLng(xxxx,xxxx),21));
答案 8 :(得分:0)
对于上述问题,这可能是最简单的解决方案,对我来说非常有用。
将所有航点添加到GoogleMapOptions下的目标:相机,然后它会自动设置缩放并使地图相对于折线(给定路线)居中。
loadMap() {
let mapOptions: GoogleMapOptions = {
camera: {
target: this.wayPoints,
zoom: 25,
tilt: 30
}
};
this.map = GoogleMaps.create('map_canvas', mapOptions);
this.map.one(GoogleMapsEvent.MAP_READY)
.then(() => {
console.log('Map is ready!');
this.map.addPolyline({
points:this.wayPoints,
color:'#586bff',
width: 8,
geodesic:true,
});
});
}
航点(this.wayPoints)应采用以下格式:
[{lat: 52.33806, lng: 8.61179},
{lat: 52.33812, lng: 8.61185},
{lat: 52.33812, lng: 8.61186},
{lat: 52.33812, lng: 8.61188}]