src/main/java/net/micode/notes/ui/NotesListActivity.java

@@ -316,6 +316,52 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.note_list);
+        
+        // 上移底部系统栏，解决写便签按钮与底部系统栏之间的多余间距
+        View decorView = getWindow().getDecorView();
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.R) {
+            // Android 11+ 使用新的WindowInsetsController API
+            android.view.WindowInsetsController insetsController = decorView.getWindowInsetsController();
+            if (insetsController != null) {
+                // 隐藏底部导航栏
+                insetsController.hide(android.view.WindowInsets.Type.navigationBars());
+                // 设置系统栏行为，允许滑动显示
+                insetsController.setSystemBarsBehavior(
+                    android.view.WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE);
+            }
+        } else if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
+            // Android 4.1-10 使用旧的系统UI可见性API
+            int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION 
+                          | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+                          | View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
+            decorView.setSystemUiVisibility(uiOptions);
+        }
+        
+        // 添加系统UI可见性变化监听器，确保系统栏保持上移状态
+        decorView.setOnSystemUiVisibilityChangeListener(
+            new View.OnSystemUiVisibilityChangeListener() {
+                @Override
+                public void onSystemUiVisibilityChange(int visibility) {
+                    // 当系统UI可见性变化时，重新设置系统UI可见性
+                    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.R) {
+                        // Android 11+ 使用新API
+                        android.view.WindowInsetsController insetsController = decorView.getWindowInsetsController();
+                        if (insetsController != null) {
+                            insetsController.hide(android.view.WindowInsets.Type.navigationBars());
+                        }
+                    } else if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
+                        // Android 4.1-10 使用旧API
+                        if ((visibility & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0) {
+                            int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION 
+                                          | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+                                          | View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
+                            decorView.setSystemUiVisibility(uiOptions);
+                        }
+                    }
+                }
+            }
+        );
+        
         initResources();
 
         /**

src/main/res/layout/note_list.xml

@@ -56,5 +56,5 @@
         android:layout_height="wrap_content"
         android:focusable="false"
         android:layout_gravity="bottom"
-        android:layout_marginBottom="16dp" />
+        android:layout_marginBottom="0dp" />
 </FrameLayout>