Merge pull request '解决了在文件夹中点击back键会直接退出小米便签的bug' (#12) from tangbo_branch into master

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

@@ -201,6 +201,19 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
          * Insert an introduction when user firstly use this application
          */
         setAppInfoFromRawRes();
+        
+        // 注册Android 13+的返回键回调
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.TIRAMISU) {
+            getOnBackInvokedDispatcher().registerOnBackInvokedCallback(
+                    android.window.OnBackInvokedDispatcher.PRIORITY_DEFAULT,
+                    new android.window.OnBackInvokedCallback() {
+                        @Override
+                        public void onBackInvoked() {
+                            handleBackPress();
+                        }
+                    }
+            );
+        }
     }
 
     /**
@@ -1052,8 +1065,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
      * 3. 如果在根文件夹中，调用默认的返回处理
      * </p>
      */
-    @Override
-    public void onBackPressed() {
+    private void handleBackPress() {
         switch (mState) {
             case SUB_FOLDER:
                 mCurrentFolderId = Notes.ID_ROOT_FOLDER;
@@ -1076,6 +1088,11 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
     }
 
+    @Override
+    public void onBackPressed() {
+        handleBackPress();
+    }
+
     /**
      * 更新部件
      * <p>