diff --git a/app/src/main/java/org/ntlab/radishforandroidstudio/framework/RWT/RWTButton.java b/app/src/main/java/org/ntlab/radishforandroidstudio/framework/RWT/RWTButton.java
index a208c76..38d66a6 100644
--- a/app/src/main/java/org/ntlab/radishforandroidstudio/framework/RWT/RWTButton.java
+++ b/app/src/main/java/org/ntlab/radishforandroidstudio/framework/RWT/RWTButton.java
@@ -6,12 +6,14 @@
 
 public class RWTButton implements TouchListener {
     private RWTSprite[] sprite = null;
-    RWTSurfaceView view;
-    public RWTButton(final RWTSurfaceView view) {
-        this.view = view;
+
+    public RWTButton(final RWTLayer layer) {
         sprite = new RWTSprite[2];
-        sprite[0] = new RWTSprite(view);
-        sprite[1] = new RWTSprite(view);
+        sprite[0] = new RWTSprite();
+        sprite[1] = new RWTSprite();
+
+        layer.addDrawable(sprite[0]);
+        layer.addDrawable(sprite[1]);
     }
 
     @Override