路径不根据Padding属性更改，改为根据x轴和y轴的极值差计算出路径范围；

lib/union/location_map_page.dart

@@ -461,12 +461,6 @@ class _LocationMap extends State<LocationMap> with WidgetsBindingObserver {
       _mapController.cleanAllMarkers();
       if (polylineId != null) _mapController.removeOverlay(polylineId);
 
-      BMFCoordinate startLocation = BMFCoordinate(
-          coordinates.first.latitude, coordinates.first.longitude);
-
-      BMFCoordinate endLocation =
-          BMFCoordinate(coordinates.last.latitude, coordinates.last.longitude);
-
       /// 创建polyline
       BMFPolyline colorsPolyline = BMFPolyline(
           // id: polylineOptions.hashCode.toString(),
@@ -486,7 +480,8 @@ class _LocationMap extends State<LocationMap> with WidgetsBindingObserver {
       /// 添加polyline
       _mapController.addPolyline(colorsPolyline);
       var startBmfMarker = BMFMarker.icon(
-        position: startLocation,
+        position: BMFCoordinate(
+            coordinates.first.latitude, coordinates.first.longitude),
         centerOffset: BMFPoint(0.5, 0.7),
         enabled: false,
         icon: "assets/image/icon_start.png",
@@ -495,19 +490,40 @@ class _LocationMap extends State<LocationMap> with WidgetsBindingObserver {
       _mapController.addMarker(startBmfMarker);
 
       var terminalBmfMarker = BMFMarker.icon(
-        position: endLocation,
+        position: BMFCoordinate(
+            coordinates.last.latitude, coordinates.last.longitude),
         centerOffset: BMFPoint(0.5, 0.7),
         enabled: false,
         icon: "assets/image/icon_end.png",
         draggable: false,
       );
       _mapController.addMarker(terminalBmfMarker);
-      _mapController.setVisibleMapRectWithPadding(
-          visibleMapBounds: BMFCoordinateBounds(
-              northeast: startLocation, southwest: endLocation),
-          animated: true,
-          insets:
-              EdgeInsets.only(top: 500.h, bottom: 200.h, left: 200.w, right: 200.w));
+
+      double maxLatitude = 0,
+          minLatitude = 0,
+          maxLongitude = 0,
+          minLongitude = 0;
+      coordinates.forEach((element) {
+        if (element.latitude > maxLatitude) maxLatitude = element.latitude;
+        if (minLatitude == 0)
+          minLatitude = element.latitude;
+        else if (element.latitude < minLatitude) minLatitude = element.latitude;
+
+        if (element.longitude > maxLongitude) maxLongitude = element.longitude;
+        if (minLongitude == 0)
+          minLongitude = element.longitude;
+        else if (element.longitude < minLongitude)
+          minLongitude = element.longitude;
+      });
+      _mapController.setVisibleMapBounds(
+          BMFCoordinateBounds(
+              northeast: BMFCoordinate(
+                  maxLatitude + ((maxLatitude - minLatitude) * 0.8),
+                  maxLongitude + ((maxLongitude - minLongitude) / 2)),
+              southwest: BMFCoordinate(
+                  minLatitude - ((maxLatitude - minLatitude) * 0.2),
+                  minLongitude - ((maxLongitude - minLongitude) / 2))),
+          true);
 
       hours = needHours == 0 ? "" : "$needHours小时";
       minutes = needMinutes == 0 ? "" : "$needMinutes分钟";