diff --git a/app/src/main/java/com/casic/dcms/ui/ArcGISMapActivity.java b/app/src/main/java/com/casic/dcms/ui/ArcGISMapActivity.java
index 4a20144..219ae3b 100644
--- a/app/src/main/java/com/casic/dcms/ui/ArcGISMapActivity.java
+++ b/app/src/main/java/com/casic/dcms/ui/ArcGISMapActivity.java
@@ -60,11 +60,16 @@
     QMUITopBarLayout gisTopLayout;
     @BindView(R.id.mapView)
     MapView mapView;
+
     private FeatureLayer communityLayer, pointLayer, packageLayer;
     private Point clickPoint;
     private Gson gson;
     private String caseType;
 
+    private ListenableList<Graphic> overlayGraphics;
+    private ListenableList<GraphicsOverlay> graphicsOverlays;
+    private GraphicsOverlay mGraphicsOverlay;
+
     @Override
     public int initLayoutView() {
         return R.layout.activity_gis;
@@ -126,6 +131,11 @@
                 break;
         }
         mapView.setMap(arcGISMap);
+
+        //Marker相关Layer
+        mGraphicsOverlay = new GraphicsOverlay();
+        overlayGraphics = mGraphicsOverlay.getGraphics();
+        graphicsOverlays = mapView.getGraphicsOverlays();
     }
 
     @SuppressLint("ClickableViewAccessibility")
@@ -346,13 +356,11 @@
      */
     private void addMarker(Point clickPoint) {
         SimpleMarkerSymbol simpleMarkerSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.CIRCLE, Color.RED, 15);
-        Graphic graphic = new Graphic(clickPoint, simpleMarkerSymbol);
-        GraphicsOverlay mGraphicsOverlay = new GraphicsOverlay();
-        ListenableList<Graphic> overlayGraphics = mGraphicsOverlay.getGraphics();
-        ListenableList<GraphicsOverlay> graphicsOverlays = mapView.getGraphicsOverlays();
-        if (overlayGraphics.size() != 0) {
+        if (overlayGraphics != null && graphicsOverlays != null) {
             overlayGraphics.clear();
+            graphicsOverlays.clear();
         }
+        Graphic graphic = new Graphic(clickPoint, simpleMarkerSymbol);
         overlayGraphics.add(graphic);
         graphicsOverlays.add(mGraphicsOverlay);
     }