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 c262372..9ac8c19 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
@@ -138,7 +138,7 @@
             @Override
             public void onChanged(Collection<Stroke> strokes) {
                     ArrayList<Stroke> s = new ArrayList<>(strokes);
-                paintCanvas.getCanvas(strokes);
+                    if(s.size()!=0) paintCanvas.getCanvas(strokes);
                 try{
                     lastpositionx = s.get(s.size()-1).getPositions().get(s.get(s.size()-1).getPositions().size()-1).getX();
                 }catch (ArrayIndexOutOfBoundsException ex){ }
@@ -148,10 +148,10 @@
                 paintViewModel.getmStrokeNo().observe(this, new Observer<Integer>() {
             @Override
             public void onChanged(Integer integer) {
-                if(laststrokesize!=integer || lastpositionx != -1) {
+//                if(laststrokesize!=integer || lastpositionx != -1) {
                     paintViewModel.getStrokes();
                     laststrokesize=integer;
-                }
+                //}
                 //paintViewModel.getPosition(integer);
             }
         });