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 28c21ac..a8c5953 100644
--- a/app/src/main/java/org/ntlab/radishforandroidstudio/sample/SampleActivity.java
+++ b/app/src/main/java/org/ntlab/radishforandroidstudio/sample/SampleActivity.java
@@ -118,6 +118,22 @@
                 System.out.println("down-button");
             }
         });
+        //left_button操作
+        Button left_button = findViewById(R.id.left_button);
+        left_button.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                System.out.println("left_button");
+            }
+        });
+        //right_button操作
+        Button right_button = findViewById(R.id.right_button);
+        right_button.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                System.out.println("right_button");
+            }
+        });
     }
 
     @Override