/** 调起高德地图导航功能，如果没安装高德地图，会进入异常，可以在异常中处理，调起高德地图app的下载页面 */
public void startAMapNavi(Marker marker) {
// 构造导航参数
NaviPara naviPara = new NaviPara();
// 设置终点位置
naviPara.setTargetPoint(marker.getPosition());
// 设置导航策略，这里是避免拥堵
naviPara.setNaviStyle(AMapUtils.DRIVING_AVOID_CONGESTION);
try {
// 调起高德地图导航
AMapUtils.openAMapNavi(naviPara, getApplicationContext());
} catch (com.amap.api.maps.AMapException e) {
// 如果没安装会进入异常，调起下载页面
AMapUtils.getLatestAMapApp(getApplicationContext());
}
}
private LatLng getPointForDis(LatLng sPt, LatLng ePt, double dis) {
double lSegLength = AMapUtils.calculateLineDistance(sPt, ePt);
double preResult = dis / lSegLength;
return new LatLng(
(ePt.latitude - sPt.latitude) * preResult + sPt.latitude,
(ePt.longitude - sPt.longitude) * preResult + sPt.longitude);
}
// 高德地图提供计算两点的距离 返回km
public static float CalculateDistance(
double start_lat, double start_lng, double end_lat, double end_lng) {
LatLng start = new LatLng(start_lat, start_lng);
LatLng end = new LatLng(end_lat, end_lng);
float dis = AMapUtils.calculateLineDistance(start, end);
dis = dis / 1000;
return dis;
}
/** 计算距离 */
public void calculateDistance(Double lati, Double logti) {
LatLng startpos =
new LatLng(mTown.getGeoinfo().getLatitude(), mTown.getGeoinfo().getLongitude());
LatLng endpos = new LatLng(lati, logti);
float distan = AMapUtils.calculateLineDistance(startpos, endpos);
if (distan < DISTANCE) {
LogUtil.v("MessboardActivity info: ", "distance is in 50!");
this.mEditView.setVisibility(View.VISIBLE);
this.mTophint.setText(getString(R.string.messboard_canmess));
// stop location
this.stopLocation();
} else {
LogUtil.v("MessboardActivity info: ", "distance is out of 50!");
this.mTophint.setText(getString(R.string.messboard_showdistan, (int) distan));
}
}
/*
* 返回 km
* */
public static double getDistance(double lat1, double lng1, double lat2, double lng2) {
LatLng start = new LatLng(lat1, lng1);
LatLng end = new LatLng(lat2, lng2);
double radLat1 = rad(lat1);
double radLat2 = rad(lat2);
double a = radLat1 - radLat2;
double b = rad(lng1) - rad(lng2);
double s =
2
* Math.asin(
Math.sqrt(
Math.pow(Math.sin(a / 2), 2)
+ Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)));
s = s * EARTH_RADIUS;
s = Math.round(s * 10000) / 10000.0;
float result[] = new float[1];
Location.distanceBetween(lat1, lng1, lat2, lng2, result);
s = Math.round(((double) result[0] / 1000) * 100) / 100.0;
AMapUtils.calculateLineDistance(start, end);
return s;
}
private void colorWayUpdate(List<TMC> tmcSection) {
if (mAMap == null) {
return;
}
if (mLatLngsOfPath == null || mLatLngsOfPath.size() <= 0) {
return;
}
if (tmcSection == null || tmcSection.size() <= 0) {
return;
}
int j = 0;
LatLng startLatLng = mLatLngsOfPath.get(0);
LatLng endLatLng = null;
double segmentTotalDistance = 0;
TMC segmentTrafficStatus;
List<LatLng> tempList = new ArrayList<LatLng>();
// 画出起点到规划路径之间的连线
addPolyLine(new PolylineOptions().add(startPoint, startLatLng).setDottedLine(true));
// 终点和规划路径之间连线
addPolyLine(
new PolylineOptions()
.add(mLatLngsOfPath.get(mLatLngsOfPath.size() - 1), endPoint)
.setDottedLine(true));
for (int i = 0; i < mLatLngsOfPath.size() && j < tmcSection.size(); i++) {
segmentTrafficStatus = tmcSection.get(j);
endLatLng = mLatLngsOfPath.get(i);
double distanceBetweenTwoPosition = AMapUtils.calculateLineDistance(startLatLng, endLatLng);
segmentTotalDistance = segmentTotalDistance + distanceBetweenTwoPosition;
if (segmentTotalDistance > segmentTrafficStatus.getDistance() + 1) {
double toSegDis =
distanceBetweenTwoPosition
- (segmentTotalDistance - segmentTrafficStatus.getDistance());
LatLng middleLatLng = getPointForDis(startLatLng, endLatLng, toSegDis);
tempList.add(middleLatLng);
startLatLng = middleLatLng;
i--;
} else {
tempList.add(endLatLng);
startLatLng = endLatLng;
}
if (segmentTotalDistance >= segmentTrafficStatus.getDistance()
|| i == mLatLngsOfPath.size() - 1) {
if (j == tmcSection.size() - 1 && i < mLatLngsOfPath.size() - 1) {
for (i++; i < mLatLngsOfPath.size(); i++) {
LatLng lastLatLng = mLatLngsOfPath.get(i);
tempList.add(lastLatLng);
}
}
j++;
if (segmentTrafficStatus.getStatus().equals("畅通")) {
addPolyLine((new PolylineOptions()).addAll(tempList).width(mWidth).color(Color.GREEN));
} else if (segmentTrafficStatus.getStatus().equals("缓行")) {
addPolyLine((new PolylineOptions()).addAll(tempList).width(mWidth).color(Color.YELLOW));
} else if (segmentTrafficStatus.getStatus().equals("拥堵")) {
addPolyLine((new PolylineOptions()).addAll(tempList).width(mWidth).color(Color.RED));
} else if (segmentTrafficStatus.getStatus().equals("严重拥堵")) {
addPolyLine(
(new PolylineOptions())
.addAll(tempList)
.width(mWidth)
.color(Color.parseColor("#990033")));
} else {
addPolyLine(
(new PolylineOptions())
.addAll(tempList)
.width(mWidth)
.color(Color.parseColor("#537edc")));
}
tempList.clear();
tempList.add(startLatLng);
segmentTotalDistance = 0;
}
if (i == mLatLngsOfPath.size() - 1) {
addPolyLine(new PolylineOptions().add(endLatLng, endPoint).setDottedLine(true));
}
}
}
