Android 开发，getSystemService 警告信息：Must be one of: Context. POWER_SERVICE ...

Object statusBarService = context.getSystemService(Context.STATUS_BAR_SERVICE);

• 在 Android 开发中，上述代码出现如下警告信息

  Must be one of:
  Context. POWER_SERVICE,
  Context. WINDOW_SERVICE,
  Context. LAYOUT_INFLATER_SERVICE,
  Context. ACCOUNT_SERVICE,
  Context. ACTIVITY_SERVICE,
  Context. ALARM_SERVICE,
  Context. NOTIFICATION_SERVICE,
  Context. ACCESSIBILITY_SERVICE,
  Context. CAPTIONING_SERVICE,
  Context. KEYGUARD_SERVICE,
  Context. LOCATION_SERVICE,
  android. content. Context. HEALTHCONNECT_SERVICE,
  Context. SEARCH_SERVICE,
  Context. SENSOR_SERVICE,
  Context. STORAGE_SERVICE,
  Context. STORAGE_STATS_SERVICE,
  Context. WALLPAPER_SERVICE,
  Context. VIBRATOR_MANAGER_SERVICE,
  Context. VIBRATOR_SERVICE,
  Context. CONNECTIVITY_SERVICE,
  Context. IPSEC_SERVICE,
  Context. VPN_MANAGEMENT_SERVICE,
  Context. NETWORK_STATS_SERVICE,
  Context. WIFI_SERVICE,
  Context. WIFI_AWARE_SERVICE,
  Context. WIFI_P2P_SERVICE,
  Context. WIFI_RTT_RANGING_SERVICE,
  Context. NSD_SERVICE,
  Context. AUDIO_SERVICE,
  Context. FINGERPRINT_SERVICE,
  Context. BIOMETRIC_SERVICE,
  Context. MEDIA_ROUTER_SERVICE,
  Context. TELEPHONY_SERVICE,
  Context. TELEPHONY_SUBSCRIPTION_SERVICE,
  Context. CARRIER_CONFIG_SERVI...

问题原因

1. 代码尝试获取 STATUS_BAR_SERVICE 系统服务，但系统提示该服务不在允许的列表中

2. 错误信息列出了所有合法的 Context.getSystemService 方法可用的服务名称

3. STATUS_BAR_SERVICE 是隐藏的系统服务，Context.getSystemService 方法仅支持公开的、文档化的系统服务

4. 可以反射调用 STATUS_BAR_SERVICE 系统服务，但是不推荐

处理策略

• 可以使用 @SuppressLint 注解抑制警告

@SuppressLint("WrongConstant")
Object statusBarService = context.getSystemService(Context.STATUS_BAR_SERVICE);

• 但是，这个时候又会出现如下警告信息，STATUS_BAR_SERVICE 是 Android 13（API 33）才引入的常量，而这里的 minSdkVersion 是 24

  Field requires API level 33 (current min is 24): android. content. Context#STATUS_BAR_SERVICE

• 可以使用字符串代替常量，Context.getSystemService 方法允许传入字符串参数，可以绕过 API 33 的限制

@SuppressLint("WrongConstant")
Object statusBarService = context.getSystemService("statusbar");