diff --git a/app/src/main/java/com/xiaoqu/watch/app/MainActivity.kt b/app/src/main/java/com/xiaoqu/watch/app/MainActivity.kt
index 2a8fd9b..eb499bf 100644
--- a/app/src/main/java/com/xiaoqu/watch/app/MainActivity.kt
+++ b/app/src/main/java/com/xiaoqu/watch/app/MainActivity.kt
@@ -137,14 +137,22 @@ class MainActivity : AppCompatActivity() {
                             3 -> {
                                 // 解绑 → 清除数据 → 跳绑定页（从任何页面都能跳）
                                 Timber.d("MainActivity: 收到解绑消息")
+                                android.widget.Toast.makeText(this@MainActivity, "收到解绑消息", android.widget.Toast.LENGTH_SHORT).show()
                                 bluetoothScanManager.stop()
                                 userPrefs.clear()
                                 try {
                                     val navHost = supportFragmentManager
-                                        .findFragmentById(R.id.nav_host_fragment) as NavHostFragment
-                                    navHost.navController.navigate(R.id.action_global_to_bind)
+                                        .findFragmentById(R.id.nav_host_fragment) as? NavHostFragment
+                                    if (navHost != null) {
+                                        navHost.navController.navigate(R.id.action_global_to_bind)
+                                        Timber.d("MainActivity: 解绑导航成功")
+                                    } else {
+                                        Timber.e("MainActivity: NavHostFragment 为 null")
+                                        android.widget.Toast.makeText(this@MainActivity, "导航失败：NavHost为空", android.widget.Toast.LENGTH_LONG).show()
+                                    }
                                 } catch (e: Exception) {
                                     Timber.e(e, "MainActivity: 解绑导航异常")
+                                    android.widget.Toast.makeText(this@MainActivity, "导航异常：${e.message}", android.widget.Toast.LENGTH_LONG).show()
                                 }
                             }
                         }