更新图层说明

+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <Objective-C-extensions>
+      <file>
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Import" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Macro" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Typedef" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Enum" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Constant" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Global" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Struct" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="FunctionPredecl" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Function" />
+      </file>
+      <class>
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Property" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Synthesize" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="InitMethod" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="StaticMethod" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="InstanceMethod" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="DeallocMethod" />
+      </class>
+      <extensions>
+        <pair source="cpp" header="h" fileNamingConvention="NONE" />
+        <pair source="c" header="h" fileNamingConvention="NONE" />
+      </extensions>
+    </Objective-C-extensions>
+  </code_scheme>
+</component>
\ No newline at end of file

@@ -7,7 +7,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.1.0'
         
 
         // NOTE: Do not place your application dependencies here; they belong

-#Fri Mar 23 21:53:12 CST 2018
+#Thu Mar 29 14:22:22 CST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip

@@ -4,4 +4,49 @@
 - 使用天地图数据（CGCS2000）
 - 使用天地图本地缓存数据（Mbtiles）
 - 实现了缩放功能
-- 实现了GPS定位
\ No newline at end of file
+- 实现了GPS定位
+
+## 图层类型说明
+
+天地图图层（CGCS2000）
+
+- TianDiTuLayerTypes
+  - VEC_C，矢量图层
+  - IMG_C，影像图层
+  - CVA_C，矢量注记层
+  - CIA_C，影像注记层
+
+腾讯图层
+
+- TencentMapLayerTypes
+  - TENCENT_MAP_VECTOR，腾讯矢量层
+  - TENCENT_MAP_VECTOR_NIGHT，腾讯矢量（夜晚）层
+  - TENCENT_MAP_IMAGE，腾讯影像层（无路网）
+  - TENCENT_MAP_ROAD，腾讯道路层
+  - TENCENT_MAP_TERRAIN，腾讯地形层
+
+Google地图层
+
+- GoogleMapLayerTypes
+  - VECTOR_GOOGLE_MAP，谷歌矢量层
+  - IMAGE_GOOGLE_MAP，谷歌影像层
+  - TERRAIN_GOOGLE_MAP，谷歌地形层
+  - IMAGE_ANNO_GOOGLE_MAP，谷歌影像层（含注记和路网）
+  - OSM_Map，OSM数据层
+
+GeoQ地图层
+
+- GeoQMapLayerTypes
+  - ChinaOnlineCommunity
+  - ChinaOnlineCommunity_Mobile
+  - ChinaOnlineCommunityENG
+  - ChinaOnlineStreetPurplishBlue
+  - ChinaOnlineStreetWarm
+
+高德数据层
+
+- GaodeMapLayerTypes
+  - AMAP_VECTOR，高德矢量地图层
+  - AMAP_IMAGE，高德影像图层（不含路网，不含注记）
+  - AMAP_ROAD，高德路网图层（含路网，含注记）
+  - AMAP_TRAFFIC，高德实时交通图层