diff --git a/app/src/main/java/org/ntlab/radishforandroidstudio/sample/SampleActivity.java b/app/src/main/java/org/ntlab/radishforandroidstudio/sample/SampleActivity.java
index c5b9541..28c21ac 100644
--- a/app/src/main/java/org/ntlab/radishforandroidstudio/sample/SampleActivity.java
+++ b/app/src/main/java/org/ntlab/radishforandroidstudio/sample/SampleActivity.java
@@ -5,6 +5,7 @@
 import android.os.Bundle;
 import android.view.MotionEvent;
 import android.view.View;
+import android.widget.Button;
 import android.widget.LinearLayout;
 
 import org.ntlab.radishforandroidstudio.R;
@@ -99,6 +100,24 @@
         camera.setFieldOfView(1.5);
         camera.setBackClipDistance(10000.0);
         start(1000L, 50L, true);
+
+
+        //top-button操作
+        Button top_button = findViewById(R.id.top_button);
+        top_button.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                System.out.println("top-button");
+            }
+        });
+        //down-button操作
+        Button down_button = findViewById(R.id.down_button);
+        down_button.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                System.out.println("down-button");
+            }
+        });
     }
 
     @Override
@@ -123,6 +142,7 @@
     public boolean onTouchEvent(MotionEvent event){
         super.onTouchEvent(event);
 
+        //ACTION_MOVE:タッチしたまま移動,ACTION_DOWN:タッチダウン
         if (event.getAction() == MotionEvent.ACTION_DOWN || event.getAction() == MotionEvent.ACTION_MOVE) {
             isTouched = true;
             float maxX = event.getDevice().getMotionRange(MotionEvent.AXIS_X).getMax();
@@ -131,8 +151,10 @@
             float minY = event.getDevice().getMotionRange(MotionEvent.AXIS_Y).getMin();
             touchX = (event.getX() - minX) / (maxX - minX);
             touchY = (event.getY() - minY) / (maxY - minY);
+            System.out.println("touch");
         } else if (event.getAction() == MotionEvent.ACTION_UP) {
             isTouched = false;
+            System.out.println("Not-touch");
         }
         return true;
     }