diff --git a/java/net/micode/notes/MainActivity.java b/java/net/micode/notes/MainActivity.java
index 8091753..c169887 100644
--- a/java/net/micode/notes/MainActivity.java
+++ b/java/net/micode/notes/MainActivity.java
@@ -13,10 +13,16 @@ public class MainActivity extends AppCompatActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        // 启用全屏显示，内容可以延伸到屏幕边缘
         EdgeToEdge.enable(this);
+        // 设置主布局
         setContentView(R.layout.activity_main);
+        
+        // 设置窗口插入监听器，处理系统状态栏和导航栏的空间
         ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
+            // 获取系统状态栏和导航栏的尺寸
             Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
+            // 设置视图的内边距，确保内容不会被系统UI遮挡
             v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
             return insets;
         });