经纬度负数问题？

src/JT808.Protocol.Test/MessageBody/JT808_0x0200Test.cs

@@ -370,5 +370,69 @@ namespace JT808.Protocol.Test.MessageBody
             Assert.Equal("7E0200005C11223344556622B8000000010000000200BA7F0E07E4F11C0028003C00001807151010100104000000640202003703020038040200011105010000000112060100000001011307000000020022012504000000172A0200F42B04000000F2300102310105167E", hex);
             //7E0200005C11223344556622B8000000010000000200BA7F0E07E4F11C0028003C00001807151010100104000000640202003703020038040200011105010000000112060100000001011307000000020022012504000000172A0200F42B04000000F2300102310105167E
         }
+
+        [Fact]
+        public void Test6()
+        {
+            JT808_0x0200 jT808UploadLocationRequest = new JT808_0x0200
+            {
+                AlarmFlag = 1,
+                Altitude = 40,
+                GPSTime = DateTime.Parse("2018-07-15 10:10:10"),
+                Lat = -12222222,
+                Lng = -132444444,
+                Speed = 60,
+                Direction = 0,
+                JT808LocationAttachData = new Dictionary<byte, JT808_0x0200_BodyBase>()
+            };
+            jT808UploadLocationRequest.StatusFlag = 402653184;
+            var hex = JT808Serializer.Serialize(jT808UploadLocationRequest).ToHexString();
+            Assert.Equal("0000000118000000FF4580F2F81B0EE40028003C0000180715101010", hex);
+        }
+
+        [Fact]
+        public void Test6_1()
+        {
+            byte[] bodys = "0000000118000000FF4580F2F81B0EE40028003C0000180715101010".ToHexBytes();
+            JT808_0x0200 jT808UploadLocationRequest = JT808Serializer.Deserialize<JT808_0x0200>(bodys);
+            Assert.Equal(1u, jT808UploadLocationRequest.AlarmFlag);
+            Assert.Equal(402653184u, jT808UploadLocationRequest.StatusFlag);
+            Assert.Equal(DateTime.Parse("2018-07-15 10:10:10"), jT808UploadLocationRequest.GPSTime);
+            Assert.Equal(-12222222, jT808UploadLocationRequest.Lat);
+            Assert.Equal(-132444444, jT808UploadLocationRequest.Lng);
+            Assert.Equal(60, jT808UploadLocationRequest.Speed); //‭402653184‬
+        }
+
+        [Fact]
+        public void Test7()
+        {
+            JT808_0x0200 jT808UploadLocationRequest = new JT808_0x0200
+            {
+                AlarmFlag = 1,
+                Altitude = 40,
+                GPSTime = DateTime.Parse("2018-07-15 10:10:10"),
+                Lat = 12222222,
+                Lng = 132444444,
+                Speed = 60,
+                Direction = 0,
+                JT808LocationAttachData = new Dictionary<byte, JT808_0x0200_BodyBase>()
+            };
+            jT808UploadLocationRequest.StatusFlag = 0x8000000;
+            var hex = JT808Serializer.Serialize(jT808UploadLocationRequest).ToHexString();
+            Assert.Equal("000000010800000000BA7F0EF81B0EE40028003C0000180715101010", hex);
+        }
+
+        [Fact]
+        public void Test7_1()
+        {
+            byte[] bodys = "000000010800000000BA7F0EF81B0EE40028003C0000180715101010".ToHexBytes();
+            JT808_0x0200 jT808UploadLocationRequest = JT808Serializer.Deserialize<JT808_0x0200>(bodys);
+            Assert.Equal(1u, jT808UploadLocationRequest.AlarmFlag);
+            Assert.Equal((uint)0x8000000, jT808UploadLocationRequest.StatusFlag);
+            Assert.Equal(DateTime.Parse("2018-07-15 10:10:10"), jT808UploadLocationRequest.GPSTime);
+            Assert.Equal(12222222, jT808UploadLocationRequest.Lat);
+            Assert.Equal(-132444444, jT808UploadLocationRequest.Lng);
+            Assert.Equal(60, jT808UploadLocationRequest.Speed); //‭402653184‬
+        }
     }
 }

src/JT808.Protocol/Formatters/MessageBodyFormatters/JT808_0x0200_Formatter.cs

@@ -15,16 +15,21 @@ namespace JT808.Protocol.Formatters.MessageBodyFormatters
             JT808_0x0200 jT808_0X0200 = new JT808_0x0200();
             jT808_0X0200.AlarmFlag = reader.ReadUInt32();
             jT808_0X0200.StatusFlag = reader.ReadUInt32();
-            jT808_0X0200.Lat = reader.ReadInt32();
             jT808_0X0200.Lng = reader.ReadInt32();
-            JT808StatusProperty jT808StatusProperty = new JT808StatusProperty(Convert.ToString(jT808_0X0200.StatusFlag, 2).PadLeft(32, '0'));
-            if (jT808StatusProperty.Bit28 == '1')//西经
-            {
-                jT808_0X0200.Lng = -jT808_0X0200.Lng;
-            }
-            if (jT808StatusProperty.Bit29 == '1')//南纬
+            jT808_0X0200.Lng = reader.ReadInt32();
+#warning 反解析的时候  负数
+            switch (jT808_0X0200.StatusFlag)
             {
-                jT808_0X0200.Lat = -jT808_0X0200.Lat;
+                case 0x8000000: //西经 ‭134217728‬
+                    //jT808_0X0200.Lng  = -lng;
+                    break;
+                case 0x10000000: //南纬 268435456
+                    //jT808_0X0200.Lat = -lat;
+                    break;
+                case 0x18000000: //西经-南纬 ‭402653184‬
+                    //jT808_0X0200.Lat = -lat;
+                    //jT808_0X0200.Lng = -lng;
+                    break;
             }
             jT808_0X0200.Altitude = reader.ReadUInt16();
             jT808_0X0200.Speed = reader.ReadUInt16();
@@ -82,6 +87,20 @@ namespace JT808.Protocol.Formatters.MessageBodyFormatters
         {
             writer.WriteUInt32(value.AlarmFlag);
             writer.WriteUInt32(value.StatusFlag);
+#warning 反解析的时候  负数
+            switch (value.StatusFlag)
+            {
+                case 0x8000000: //西经 ‭134217728‬
+                    value.Lat = -value.Lat;
+                    break;
+                case 0x10000000: //南纬 268435456
+                    value.Lng = -value.Lng;
+                    break;
+                case 0x18000000: //西经-南纬 ‭402653184‬
+                    value.Lat = -value.Lat;
+                    value.Lng = -value.Lng;
+                    break;
+            }
             writer.WriteInt32(value.Lat);
             writer.WriteInt32(value.Lng);
             writer.WriteUInt16(value.Altitude);