diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintActivity.java b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintActivity.java
index 57741c6..c262372 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintActivity.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintActivity.java
@@ -19,6 +19,7 @@
 import org.ntlab.acanthus_client.entities.Position;
 import org.ntlab.acanthus_client.entities.Stroke;
 
+import java.util.ArrayList;
 import java.util.Collection;
 
 //-----------------------------------------------------------------
@@ -30,7 +31,8 @@
     private PaintScreenShot paintScreenShot;
     private ActivityPaintBinding binding;
     private PaintViewModel paintViewModel;
-
+    private int laststrokesize=0;
+    private float lastpositionx=0;
     private boolean buttonView = false;
 
     //-----------------------------------------------------------------
@@ -135,21 +137,30 @@
         paintViewModel.getStroke().observe(this, new Observer<Collection<Stroke>>() {
             @Override
             public void onChanged(Collection<Stroke> strokes) {
-                    paintCanvas.getCanvas();
+                    ArrayList<Stroke> s = new ArrayList<>(strokes);
+                paintCanvas.getCanvas(strokes);
+                try{
+                    lastpositionx = s.get(s.size()-1).getPositions().get(s.get(s.size()-1).getPositions().size()-1).getX();
+                }catch (ArrayIndexOutOfBoundsException ex){ }
             }
         });
 //1時的コメントアウトここから
-        //        paintViewModel.getmStrokeNo().observe(this, new Observer<Integer>() {
-//            @Override
-//            public void onChanged(Integer integer) {
-//                paintViewModel.getPosition(integer);
-//            }
-//        });
+                paintViewModel.getmStrokeNo().observe(this, new Observer<Integer>() {
+            @Override
+            public void onChanged(Integer integer) {
+                if(laststrokesize!=integer || lastpositionx != -1) {
+                    paintViewModel.getStrokes();
+                    laststrokesize=integer;
+                }
+                //paintViewModel.getPosition(integer);
+            }
+        });
 //        paintViewModel.getMlatestPosition().observe(this, new Observer<Collection<Position>>() {
 //            @Override
 //            public void onChanged(Collection<Position> positions) {
-//                if(positions.size()!=1){
-//                    //paintCanvas.latestPositionWrite(positions);
+//                if((positions.size()!=1) && (positions.size()!=lastpositionsize)){
+//                    paintCanvas.latestPositionWrite(positions);
+//                    lastpositionsize=positions.size();
 //                }
 //            }
 //        });