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 8cf9b0a..7c680f8 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
@@ -6,17 +6,13 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.util.Log;
-import android.view.MotionEvent;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;
-import android.widget.Toast;
 
 import org.ntlab.acanthus_client.Acanthus;
 import org.ntlab.acanthus_client.R;
 import org.ntlab.acanthus_client.databinding.ActivityPaintBinding;
-import org.ntlab.acanthus_client.entities.Position;
 import org.ntlab.acanthus_client.entities.Stroke;
 
 import java.util.Collection;
@@ -87,7 +83,7 @@
     //-----------------------------------------------------------------
     //　描画全体のクリア
     public void onClickClear(View view) {
-        paintCanvas.clearCanvas();
+        paintCanvas.deleteStroke();
     }
 
     //-----------------------------------------------------------------
@@ -136,7 +132,7 @@
         paintViewModel.getStroke().observe(this, new Observer<Collection<Stroke>>() {
             @Override
             public void onChanged(Collection<Stroke> strokes) {
-                paintCanvas.getCanvas();
+                paintCanvas.updateCanvas();
             }
         });