增加计算2点距离

android/src/main/java/com/amap/flutter/location/AMapFlutterLocationPlugin.java

@@ -16,7 +16,9 @@ import io.flutter.plugin.common.MethodChannel;
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
 import io.flutter.plugin.common.MethodChannel.Result;
 
-/** 高德地图定位sdkFlutterPlugin */
+/**
+ * 高德地图定位sdkFlutterPlugin
+ */
 public class AMapFlutterLocationPlugin implements FlutterPlugin, MethodCallHandler,
         EventChannel.StreamHandler {
     private static final String CHANNEL_METHOD_LOCATION = "amap_flutter_location";
@@ -34,7 +36,7 @@ public class AMapFlutterLocationPlugin implements FlutterPlugin, MethodCallHandl
         String callMethod = call.method;
         switch (call.method) {
             case "updatePrivacyStatement":
-        updatePrivacyStatement((Map)call.arguments);
+                updatePrivacyStatement((Map) call.arguments);
                 break;
             case "setApiKey":
                 setApiKey((Map) call.arguments);
@@ -51,6 +53,8 @@ public class AMapFlutterLocationPlugin implements FlutterPlugin, MethodCallHandl
             case "destroy":
                 destroy((Map) call.arguments);
                 break;
+            case "calculateDistance":
+                calculateDistance((Map) call.arguments,result);
             default:
                 result.notImplemented();
                 break;
@@ -91,6 +95,18 @@ public class AMapFlutterLocationPlugin implements FlutterPlugin, MethodCallHandl
         }
     }
 
+    /**
+     * 计算两点之间的距离
+     */
+    private void calculateDistance(Map argsMap,Result result) {
+        double lat1 = (double) argsMap.get("lat1");
+        double lng1 = (double) argsMap.get("lng1");
+        double lat2 = (double) argsMap.get("lat2");
+        double lng2 = (double) argsMap.get("lng2");
+        double distance = AMapLocationClientImpl.calculateDistance(lat1, lng1, lat2, lng2);
+        result.success(distance);
+    }
+
     /**
      * 销毁
      *
@@ -127,7 +143,8 @@ public class AMapFlutterLocationPlugin implements FlutterPlugin, MethodCallHandl
                 boolean hasContains = (boolean) privacyShowMap.get("hasContains");
                 boolean hasShow = (boolean) privacyShowMap.get("hasShow");
                 try {
-          Method showMethod = locationClazz.getMethod("updatePrivacyShow", Context.class, boolean.class, boolean.class);;
+                    Method showMethod = locationClazz.getMethod("updatePrivacyShow", Context.class, boolean.class, boolean.class);
+                    ;
                     showMethod.invoke(null, mContext, hasContains, hasShow);
                 } catch (Throwable e) {
 //          e.printStackTrace();

android/src/main/java/com/amap/flutter/location/AMapLocationClientImpl.java

@@ -7,6 +7,8 @@ import com.amap.api.location.AMapLocation;
 import com.amap.api.location.AMapLocationClient;
 import com.amap.api.location.AMapLocationClientOption;
 import com.amap.api.location.AMapLocationListener;
+import com.amap.api.location.CoordinateConverter;
+import com.amap.api.location.DPoint;
 
 import java.util.Map;
 
@@ -58,6 +60,18 @@ public class AMapLocationClientImpl implements AMapLocationListener {
     }
 
 
+    public static float calculateDistance(double lat1, double lon1, double lat2, double lon2) {
+        DPoint dPoint1 = new DPoint();
+        dPoint1.setLatitude(lat1);
+        dPoint1.setLongitude(lon1);
+        DPoint dPoint2 = new DPoint();
+        dPoint2.setLatitude(lat2);
+        dPoint2.setLongitude(lon2);
+
+        return CoordinateConverter.calculateLineDistance(dPoint1, dPoint2);
+    }
+
+
     /**
      * 停止定位
      */
@@ -70,11 +84,12 @@ public class AMapLocationClientImpl implements AMapLocationListener {
     }
 
     public void destroy() {
-        if(null != locationClient) {
+        if (null != locationClient) {
             locationClient.onDestroy();
             locationClient = null;
         }
     }
+
     /**
      * 定位回调
      *

lib/amap_flutter_location.dart

@@ -54,6 +54,11 @@ class AMapFlutterLocation {
     _methodChannel.invokeMethod('stopLocation', {'pluginKey': _pluginKey});
     return;
   }
+  ///计算2点之间的距离
+  Future<double> calculateDistance(double lat1, double lon1, double lat2, double lon2) async {
+    double result = await _methodChannel.invokeMethod('calculateDistance', {'lat1': lat1, 'lon1': lon1, 'lat2': lat2, 'lon2': lon2});
+    return result;
+  }
 
   ///设置Android和iOS的apikey，建议在weigdet初始化时设置<br>
   ///apiKey的申请请参考高德开放平台官网<br>