Android 日志原理解析

一、Logcat

二、Dumpsys

参考链接：https://mikejun.blog.csdn.net/article/details/134957247

C:\Users\pengcheng.ding>adb shell dumpsys --help
usage: dumpsys
         To dump all services.
or:
       dumpsys [-t TIMEOUT] [--priority LEVEL] [--clients] [--dump] [--pid] [--thread] [--help | -l | --skip SERVICES | SERVICE [ARGS]]
         --help: shows this help
         -l: only list services, do not dump them
         -t TIMEOUT_SEC: TIMEOUT to use in seconds instead of default 10 seconds
         -T TIMEOUT_MS: TIMEOUT to use in milliseconds instead of default 10 seconds
         --clients: dump client PIDs instead of usual dump
         --dump: ask the service to dump itself (this is the default)
         --pid: dump PID instead of usual dump
         --proto: filter services that support dumping data in proto format. Dumps
               will be in proto format.
         --priority LEVEL: filter services based on specified priority
               LEVEL must be one of CRITICAL | HIGH | NORMAL
         --skip SERVICES: dumps all services but SERVICES (comma-separated list)
         --stability: dump binder stability information instead of usual dump
         --thread: dump thread usage instead of usual dump
         SERVICE [ARGS]: dumps only service SERVICE, optionally passing ARGS to it

dumpsys基本命令如上，adb shell dumpsys xxx，其中xxx通常为android servicemanager里面注册的服务，只要adb shell dumpsys -l能输出的服务都可以通过此命令来dumpsys一些关键信息。如下依次来介绍dumpsys实现原理。

1、dumpsys进程

//frameworks/native/cmds/dumpsys/Android.bp
cc_binary {
    name: "dumpsys",
    defaults: ["dumpsys_defaults"],
    srcs: [ "main.cpp", ],
    shared_libs: [ "packagemanager_aidl-cpp", ],
}
cc_defaults {
    name: "dumpsys_defaults",
    cflags: [ "-Wall",  "-Werror", ],
    srcs: [ "dumpsys.cpp", ],
    shared_libs: [
        "libbase",
        "libutils",
        "liblog",
        "libbinder",
        "libbinderdebug",
    ],
    static_libs: [  "libserviceutils", ],
}
//frameworks/native/cmds/dumpsys/main.cpp
int main(int argc, char* const argv[]) {
    signal(SIGPIPE, SIG_IGN);
    sp<IServiceManager> sm = defaultServiceManager();
    fflush(stdout);
    if (sm == nullptr) {
        ALOGE("Unable to get default service manager!");
        std::cerr << "dumpsys: Unable to get default service manager!" << std::endl;
        return 20;
    }
    Dumpsys dumpsys(sm.get());  //核心逻辑
    return dumpsys.main(argc, argv);
}

如上代码dumpsys就是一个普通的native进程，核心的逻辑还是frameworks/native/cmds/dumpsys/dumpsys.cpp的main函数：

因此dumpsys xxx最后是通过servicemanager让系统Service进行了dump，常用的dumpsys命令如下：

adb shell dumpsys activity //查询AMS服务相关信息
adb shell dumpsys package  //查询包管理相关信息
adb shell dumpsys window   //查询WMS服务相关信息
adb shell dumpsys meminfo/cpuinfo/gfxinfo //查询内存/CPU/帧率相关信息
adb shell dumpsys power/batterystats/battery   //查询电源相关信息/电池状态/电池
adb shell dumpsys alarm/location     //查询闹钟/位置相关信息
adb shell dumpsys user/device_policy     //查询用户相关信息
adb shell dumpsys connectivity/netpolicy/netstats   //查询网络连接/策略/状态
adb shell dumpsys network_management    //查询网络管理相关信息

所有的service定义和service注册的字符串全在如下文件进行frameworks/base/core/java/android/content/Context.java进行定义

http://aospxref.com/android-14.0.0_r2/xref/frameworks/base/core/java/android/content/Context.java#4437  
  /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.os.PowerManager} for controlling power management,
     * including "wake locks," which let you keep the device on while
     * you're running long tasks.
     */
    public static final String POWER_SERVICE = "power";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.os.PowerStatsService} for accessing power stats
     * service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    public static final String POWER_STATS_SERVICE = "powerstats";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.os.RecoverySystem} for accessing the recovery system
     * service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    public static final String RECOVERY_SERVICE = "recovery";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.os.SystemUpdateManager} for accessing the system update
     * manager service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    @SystemApi
    public static final String SYSTEM_UPDATE_SERVICE = "system_update";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.view.WindowManager} for accessing the system's window
     * manager.
     *
     * @see #getSystemService(String)
     * @see android.view.WindowManager
     */
    @UiContext
    public static final String WINDOW_SERVICE = "window";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.view.LayoutInflater} for inflating layout resources in this
     * context.
     *
     * @see #getSystemService(String)
     * @see android.view.LayoutInflater
     */
    @UiContext
    public static final String LAYOUT_INFLATER_SERVICE = "layout_inflater";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.accounts.AccountManager} for receiving intents at a
     * time of your choosing.
     *
     * @see #getSystemService(String)
     * @see android.accounts.AccountManager
     */
    public static final String ACCOUNT_SERVICE = "account";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.ActivityManager} for interacting with the global
     * system state.
     *
     * @see #getSystemService(String)
     * @see android.app.ActivityManager
     */
    public static final String ACTIVITY_SERVICE = "activity";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.ActivityTaskManager} for interacting with the global system state.
     *
     * @see #getSystemService(String)
     * @see android.app.ActivityTaskManager
     * @hide
     */
    public static final String ACTIVITY_TASK_SERVICE = "activity_task";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.UriGrantsManager} for interacting with the global system state.
     *
     * @see #getSystemService(String)
     * @see android.app.UriGrantsManager
     * @hide
     */
    public static final String URI_GRANTS_SERVICE = "uri_grants";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.AlarmManager} for receiving intents at a
     * time of your choosing.
     *
     * @see #getSystemService(String)
     * @see android.app.AlarmManager
     */
    public static final String ALARM_SERVICE = "alarm";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.NotificationManager} for informing the user of
     * background events.
     *
     * @see #getSystemService(String)
     * @see android.app.NotificationManager
     */
    public static final String NOTIFICATION_SERVICE = "notification";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.view.accessibility.AccessibilityManager} for giving the user
     * feedback for UI events through the registered event listeners.
     *
     * @see #getSystemService(String)
     * @see android.view.accessibility.AccessibilityManager
     */
    public static final String ACCESSIBILITY_SERVICE = "accessibility";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.view.accessibility.CaptioningManager} for obtaining
     * captioning properties and listening for changes in captioning
     * preferences.
     *
     * @see #getSystemService(String)
     * @see android.view.accessibility.CaptioningManager
     */
    public static final String CAPTIONING_SERVICE = "captioning";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.KeyguardManager} for controlling keyguard.
     *
     * @see #getSystemService(String)
     * @see android.app.KeyguardManager
     */
    public static final String KEYGUARD_SERVICE = "keyguard";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.location.LocationManager} for controlling location
     * updates.
     *
     * @see #getSystemService(String)
     * @see android.location.LocationManager
     */
    public static final String LOCATION_SERVICE = "location";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.location.CountryDetector} for detecting the country that
     * the user is in.
     *
     * @hide
     */
    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
    public static final String COUNTRY_DETECTOR = "country_detector";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.app.SearchManager} for handling searches.
     *
     * <p>
     * {@link Configuration#UI_MODE_TYPE_WATCH} does not support
     * {@link android.app.SearchManager}.
     *
     * @see #getSystemService
     * @see android.app.SearchManager
     */
    public static final String SEARCH_SERVICE = "search";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.hardware.SensorManager} for accessing sensors.
     *
     * @see #getSystemService(String)
     * @see android.hardware.SensorManager
     */
    public static final String SENSOR_SERVICE = "sensor";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.hardware.SensorPrivacyManager} for accessing sensor privacy
     * functions.
     *
     * @see #getSystemService(String)
     * @see android.hardware.SensorPrivacyManager
     *
     * @hide
     */
    public static final String SENSOR_PRIVACY_SERVICE = "sensor_privacy";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.os.storage.StorageManager} for accessing system storage
     * functions.
     *
     * @see #getSystemService(String)
     * @see android.os.storage.StorageManager
     */
    public static final String STORAGE_SERVICE = "storage";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.app.usage.StorageStatsManager} for accessing system storage
     * statistics.
     *
     * @see #getSystemService(String)
     * @see android.app.usage.StorageStatsManager
     */
    public static final String STORAGE_STATS_SERVICE = "storagestats";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * com.android.server.WallpaperService for accessing wallpapers.
     *
     * @see #getSystemService(String)
     */
    @UiContext
    public static final String WALLPAPER_SERVICE = "wallpaper";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link android.os.VibratorManager}
     * for accessing the device vibrators, interacting with individual ones and playing synchronized
     * effects on multiple vibrators.
     *
     * @see #getSystemService(String)
     * @see android.os.VibratorManager
     */
    @SuppressLint("ServiceName")
    public static final String VIBRATOR_MANAGER_SERVICE = "vibrator_manager";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link android.os.Vibrator} for
     * interacting with the vibration hardware.
     *
     * @deprecated Use {@link android.os.VibratorManager} to retrieve the default system vibrator.
     * @see #getSystemService(String)
     * @see android.os.Vibrator
     */
    @Deprecated
    public static final String VIBRATOR_SERVICE = "vibrator";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.app.StatusBarManager} for interacting with the status bar and quick settings.
     *
     * @see #getSystemService(String)
     * @see android.app.StatusBarManager
     *
     */
    @SuppressLint("ServiceName")
    public static final String STATUS_BAR_SERVICE = "statusbar";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.net.ConnectivityManager} for handling management of
     * network connections.
     *
     * @see #getSystemService(String)
     * @see android.net.ConnectivityManager
     */
    public static final String CONNECTIVITY_SERVICE = "connectivity";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.net.PacProxyManager} for handling management of
     * pac proxy information.
     *
     * @see #getSystemService(String)
     * @see android.net.PacProxyManager
     * @hide
     */
    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
    public static final String PAC_PROXY_SERVICE = "pac_proxy";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link android.net.vcn.VcnManager}
     * for managing Virtual Carrier Networks
     *
     * @see #getSystemService(String)
     * @see android.net.vcn.VcnManager
     * @hide
     */
    public static final String VCN_MANAGEMENT_SERVICE = "vcn_management";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.net.INetd} for communicating with the network stack
     * @hide
     * @see #getSystemService(String)
     * @hide
     */
    @SystemApi
    public static final String NETD_SERVICE = "netd";

    /**
     * Use with {@link android.os.ServiceManager.getService()} to retrieve a
     * {@link INetworkStackConnector} IBinder for communicating with the network stack
     * @hide
     * @see NetworkStackClient
     */
    public static final String NETWORK_STACK_SERVICE = "network_stack";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link android.net.TetheringManager}
     * for managing tethering functions.
     * @hide
     * @see android.net.TetheringManager
     */
    @SystemApi
    public static final String TETHERING_SERVICE = "tethering";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.net.IpSecManager} for encrypting Sockets or Networks with
     * IPSec.
     *
     * @see #getSystemService(String)
     */
    public static final String IPSEC_SERVICE = "ipsec";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link android.net.VpnManager} to
     * manage profiles for the platform built-in VPN.
     *
     * @see #getSystemService(String)
     */
    public static final String VPN_MANAGEMENT_SERVICE = "vpn_management";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.net.ConnectivityDiagnosticsManager} for performing network connectivity diagnostics
     * as well as receiving network connectivity information from the system.
     *
     * @see #getSystemService(String)
     * @see android.net.ConnectivityDiagnosticsManager
     */
    public static final String CONNECTIVITY_DIAGNOSTICS_SERVICE = "connectivity_diagnostics";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.net.TestNetworkManager} for building TUNs and limited-use Networks
     *
     * @see #getSystemService(String)
     * @hide
     */
    @TestApi @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
    public static final String TEST_NETWORK_SERVICE = "test_network";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.os.IUpdateLock} for managing runtime sequences that
     * must not be interrupted by headless OTA application or similar.
     *
     * @hide
     * @see #getSystemService(String)
     * @see android.os.UpdateLock
     */
    public static final String UPDATE_LOCK_SERVICE = "updatelock";

    /**
     * Constant for the internal network management service, not really a Context service.
     * @hide
     */
    public static final String NETWORKMANAGEMENT_SERVICE = "network_management";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link com.android.server.slice.SliceManagerService} for managing slices.
     * @hide
     * @see #getSystemService(String)
     */
    public static final String SLICE_SERVICE = "slice";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.app.usage.NetworkStatsManager} for querying network usage stats.
     *
     * @see #getSystemService(String)
     * @see android.app.usage.NetworkStatsManager
     */
    public static final String NETWORK_STATS_SERVICE = "netstats";
    /** {@hide} */
    public static final String NETWORK_POLICY_SERVICE = "netpolicy";
    /** {@hide} */
    public static final String NETWORK_WATCHLIST_SERVICE = "network_watchlist";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.net.wifi.WifiManager} for handling management of
     * Wi-Fi access.
     *
     * @see #getSystemService(String)
     * @see android.net.wifi.WifiManager
     */
    public static final String WIFI_SERVICE = "wifi";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.net.wifi.wificond.WifiNl80211Manager} for handling management of the
     * Wi-Fi nl802.11 daemon (wificond).
     *
     * @see #getSystemService(String)
     * @see android.net.wifi.wificond.WifiNl80211Manager
     * @hide
     */
    @SystemApi
    @SuppressLint("ServiceName")
    public static final String WIFI_NL80211_SERVICE = "wifinl80211";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.net.wifi.p2p.WifiP2pManager} for handling management of
     * Wi-Fi peer-to-peer connections.
     *
     * @see #getSystemService(String)
     * @see android.net.wifi.p2p.WifiP2pManager
     */
    public static final String WIFI_P2P_SERVICE = "wifip2p";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.net.wifi.aware.WifiAwareManager} for handling management of
     * Wi-Fi Aware.
     *
     * @see #getSystemService(String)
     * @see android.net.wifi.aware.WifiAwareManager
     */
    public static final String WIFI_AWARE_SERVICE = "wifiaware";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.net.wifi.WifiScanner} for scanning the wifi universe
     *
     * @see #getSystemService(String)
     * @see android.net.wifi.WifiScanner
     * @hide
     */
    @SystemApi
    public static final String WIFI_SCANNING_SERVICE = "wifiscanner";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.net.wifi.RttManager} for ranging devices with wifi
     *
     * @see #getSystemService(String)
     * @see android.net.wifi.RttManager
     * @hide
     */
    @SystemApi
    @Deprecated
    public static final String WIFI_RTT_SERVICE = "rttmanager";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.net.wifi.rtt.WifiRttManager} for ranging devices with wifi.
     *
     * @see #getSystemService(String)
     * @see android.net.wifi.rtt.WifiRttManager
     */
    public static final String WIFI_RTT_RANGING_SERVICE = "wifirtt";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.net.lowpan.LowpanManager} for handling management of
     * LoWPAN access.
     *
     * @see #getSystemService(String)
     * @see android.net.lowpan.LowpanManager
     *
     * @hide
     */
    public static final String LOWPAN_SERVICE = "lowpan";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link android.net.EthernetManager}
     * for handling management of Ethernet access.
     *
     * @see #getSystemService(String)
     * @see android.net.EthernetManager
     *
     * @hide
     */
    @SystemApi
    public static final String ETHERNET_SERVICE = "ethernet";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.net.nsd.NsdManager} for handling management of network service
     * discovery
     *
     * @see #getSystemService(String)
     * @see android.net.nsd.NsdManager
     */
    public static final String NSD_SERVICE = "servicediscovery";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.media.AudioManager} for handling management of volume,
     * ringer modes and audio routing.
     *
     * @see #getSystemService(String)
     * @see android.media.AudioManager
     */
    public static final String AUDIO_SERVICE = "audio";

    /**
     * @hide
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.media.AudioDeviceVolumeManager} for handling management of audio device
     * (e.g. speaker, USB headset) volume.
     *
     * @see #getSystemService(String)
     * @see android.media.AudioDeviceVolumeManager
     */
    @SystemApi
    public static final String AUDIO_DEVICE_VOLUME_SERVICE = "audio_device_volume";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.media.MediaTranscodingManager} for transcoding media.
     *
     * @hide
     * @see #getSystemService(String)
     * @see android.media.MediaTranscodingManager
     */
    @SystemApi
    public static final String MEDIA_TRANSCODING_SERVICE = "media_transcoding";

    /**
     * AuthService orchestrates biometric and PIN/pattern/password authentication.
     *
     * BiometricService was split into two services, AuthService and BiometricService, where
     * AuthService is the high level service that orchestrates all types of authentication, and
     * BiometricService is a lower layer responsible only for biometric authentication.
     *
     * Ideally we should have renamed BiometricManager to AuthManager, because it logically
     * corresponds to AuthService. However, because BiometricManager is a public API, we kept
     * the old name but changed the internal implementation to use AuthService.
     *
     * As of now, the AUTH_SERVICE constant is only used to identify the service in
     * SystemServiceRegistry and SELinux. To obtain the manager for AUTH_SERVICE, one should use
     * BIOMETRIC_SERVICE with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.biometrics.BiometricManager}
     *
     * Map of the two services and their managers:
     * [Service]            [Manager]
     * AuthService          BiometricManager
     * BiometricService     N/A
     *
     * @hide
     */
    public static final String AUTH_SERVICE = "auth";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.fingerprint.FingerprintManager} for handling management
     * of fingerprints.
     *
     * @see #getSystemService(String)
     * @see android.hardware.fingerprint.FingerprintManager
     */
    public static final String FINGERPRINT_SERVICE = "fingerprint";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.face.FaceManager} for handling management
     * of face authentication.
     *
     * @hide
     * @see #getSystemService
     * @see android.hardware.face.FaceManager
     */
    public static final String FACE_SERVICE = "face";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.iris.IrisManager} for handling management
     * of iris authentication.
     *
     * @hide
     * @see #getSystemService
     * @see android.hardware.iris.IrisManager
     */
    public static final String IRIS_SERVICE = "iris";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.biometrics.BiometricManager} for handling
     * biometric and PIN/pattern/password authentication.
     *
     * @see #getSystemService
     * @see android.hardware.biometrics.BiometricManager
     */
    public static final String BIOMETRIC_SERVICE = "biometric";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.media.MediaCommunicationManager}
     * for managing {@link android.media.MediaSession2}.
     *
     * @see #getSystemService(String)
     * @see android.media.MediaCommunicationManager
     */
    public static final String MEDIA_COMMUNICATION_SERVICE = "media_communication";

    /**
     * Use with {@link #getSystemService} to retrieve a
     * {@link android.media.MediaRouter} for controlling and managing
     * routing of media.
     *
     * @see #getSystemService(String)
     * @see android.media.MediaRouter
     */
    public static final String MEDIA_ROUTER_SERVICE = "media_router";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.media.session.MediaSessionManager} for managing media Sessions.
     *
     * @see #getSystemService(String)
     * @see android.media.session.MediaSessionManager
     */
    public static final String MEDIA_SESSION_SERVICE = "media_session";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.telephony.TelephonyManager} for handling management the
     * telephony features of the device.
     *
     * @see #getSystemService(String)
     * @see android.telephony.TelephonyManager
     */
    public static final String TELEPHONY_SERVICE = "phone";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.telephony.SubscriptionManager} for handling management the
     * telephony subscriptions of the device.
     *
     * @see #getSystemService(String)
     * @see android.telephony.SubscriptionManager
     */
    public static final String TELEPHONY_SUBSCRIPTION_SERVICE = "telephony_subscription_service";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.telecom.TelecomManager} to manage telecom-related features
     * of the device.
     *
     * @see #getSystemService(String)
     * @see android.telecom.TelecomManager
     */
    public static final String TELECOM_SERVICE = "telecom";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.telephony.CarrierConfigManager} for reading carrier configuration values.
     *
     * @see #getSystemService(String)
     * @see android.telephony.CarrierConfigManager
     */
    public static final String CARRIER_CONFIG_SERVICE = "carrier_config";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.telephony.euicc.EuiccManager} to manage the device eUICC (embedded SIM).
     *
     * @see #getSystemService(String)
     * @see android.telephony.euicc.EuiccManager
     */
    public static final String EUICC_SERVICE = "euicc";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.telephony.euicc.EuiccCardManager} to access the device eUICC (embedded SIM).
     *
     * @see #getSystemService(String)
     * @see android.telephony.euicc.EuiccCardManager
     * @hide
     */
    @SystemApi
    public static final String EUICC_CARD_SERVICE = "euicc_card";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.telephony.MmsManager} to send/receive MMS messages.
     *
     * @see #getSystemService(String)
     * @see android.telephony.MmsManager
     * @hide
     */
    public static final String MMS_SERVICE = "mms";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.content.ClipboardManager} for accessing and modifying
     * the contents of the global clipboard.
     *
     * @see #getSystemService(String)
     * @see android.content.ClipboardManager
     */
    public static final String CLIPBOARD_SERVICE = "clipboard";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link TextClassificationManager} for text classification services.
     *
     * @see #getSystemService(String)
     * @see TextClassificationManager
     */
    public static final String TEXT_CLASSIFICATION_SERVICE = "textclassification";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.view.selectiontoolbar.SelectionToolbarManager} for selection toolbar service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    public static final String SELECTION_TOOLBAR_SERVICE = "selection_toolbar";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.graphics.fonts.FontManager} for font services.
     *
     * @see #getSystemService(String)
     * @see android.graphics.fonts.FontManager
     * @hide
     */
    @SystemApi
    @TestApi
    public static final String FONT_SERVICE = "font";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link com.android.server.attention.AttentionManagerService} for attention services.
     *
     * @see #getSystemService(String)
     * @see android.server.attention.AttentionManagerService
     * @hide
     */
    @TestApi
    public static final String ATTENTION_SERVICE = "attention";

    /**
     * Official published name of the (internal) rotation resolver service.
     *
     * // TODO(b/178151184): change it back to rotation resolver before S release.
     *
     * @see #getSystemService(String)
     * @hide
     */
    public static final String ROTATION_RESOLVER_SERVICE = "resolver";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.view.inputmethod.InputMethodManager} for accessing input
     * methods.
     *
     * @see #getSystemService(String)
     */
    public static final String INPUT_METHOD_SERVICE = "input_method";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.view.textservice.TextServicesManager} for accessing
     * text services.
     *
     * @see #getSystemService(String)
     */
    public static final String TEXT_SERVICES_MANAGER_SERVICE = "textservices";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.appwidget.AppWidgetManager} for accessing AppWidgets.
     *
     * @see #getSystemService(String)
     */
    public static final String APPWIDGET_SERVICE = "appwidget";

    /**
     * Official published name of the (internal) voice interaction manager service.
     *
     * @hide
     * @see #getSystemService(String)
     */
    public static final String VOICE_INTERACTION_MANAGER_SERVICE = "voiceinteraction";

    /**
     * Official published name of the (internal) autofill service.
     *
     * @hide
     * @see #getSystemService(String)
     */
    public static final String AUTOFILL_MANAGER_SERVICE = "autofill";

    /**
     * Official published name of the (internal) text to speech manager service.
     *
     * @hide
     * @see #getSystemService(String)
     */
    public static final String TEXT_TO_SPEECH_MANAGER_SERVICE = "texttospeech";

    /**
     * Official published name of the content capture service.
     *
     * @hide
     * @see #getSystemService(String)
     */
    @TestApi
    @SuppressLint("ServiceName")  // TODO: This should be renamed to CONTENT_CAPTURE_SERVICE
    public static final String CONTENT_CAPTURE_MANAGER_SERVICE = "content_capture";

    /**
     * Official published name of the translation service.
     *
     * @hide
     * @see #getSystemService(String)
     */
    @SystemApi
    @SuppressLint("ServiceName")
    public static final String TRANSLATION_MANAGER_SERVICE = "translation";

    /**
     * Official published name of the translation service which supports ui translation function.
     *
     * @hide
     * @see #getSystemService(String)
     */
    @SystemApi
    public static final String UI_TRANSLATION_SERVICE = "ui_translation";

    /**
     * Used for getting content selections and classifications for task snapshots.
     *
     * @hide
     * @see #getSystemService(String)
     */
    @SystemApi
    public static final String CONTENT_SUGGESTIONS_SERVICE = "content_suggestions";

    /**
     * Official published name of the app prediction service.
     *
     * <p><b>NOTE: </b> this service is optional; callers of
     * {@code Context.getSystemServiceName(APP_PREDICTION_SERVICE)} should check for {@code null}.
     *
     * @hide
     * @see #getSystemService(String)
     */
    @SystemApi
    public static final String APP_PREDICTION_SERVICE = "app_prediction";

    /**
     * Official published name of the search ui service.
     *
     * <p><b>NOTE: </b> this service is optional; callers of
     * {@code Context.getSystemServiceName(SEARCH_UI_SERVICE)} should check for {@code null}.
     *
     * @hide
     * @see #getSystemService(String)
     */
    @SystemApi
    public static final String SEARCH_UI_SERVICE = "search_ui";

    /**
     * Used for getting the smartspace service.
     *
     * <p><b>NOTE: </b> this service is optional; callers of
     * {@code Context.getSystemServiceName(SMARTSPACE_SERVICE)} should check for {@code null}.
     *
     * @hide
     * @see #getSystemService(String)
     */
    @SystemApi
    public static final String SMARTSPACE_SERVICE = "smartspace";

    /**
     * Used for getting the cloudsearch service.
     *
     * <p><b>NOTE: </b> this service is optional; callers of
     * {@code Context.getSystemServiceName(CLOUDSEARCH_SERVICE)} should check for {@code null}.
     *
     * @hide
     * @see #getSystemService(String)
     */
    @SystemApi
    public static final String CLOUDSEARCH_SERVICE = "cloudsearch";

    /**
     * Use with {@link #getSystemService(String)} to access the
     * {@link com.android.server.voiceinteraction.SoundTriggerService}.
     *
     * @hide
     * @see #getSystemService(String)
     */
    public static final String SOUND_TRIGGER_SERVICE = "soundtrigger";

    /**
     * Use with {@link #getSystemService(String)} to access the
     * {@link com.android.server.soundtrigger_middleware.SoundTriggerMiddlewareService}.
     *
     * @hide
     * @see #getSystemService(String)
     */
    public static final String SOUND_TRIGGER_MIDDLEWARE_SERVICE = "soundtrigger_middleware";

    /**
     * Used for getting the wallpaper effects generation service.
     *
     * <p><b>NOTE: </b> this service is optional; callers of
     * {@code Context.getSystemServiceName(WALLPAPER_EFFECTS_GENERATION_SERVICE)} should check for
     * {@code null}.
     *
     * @hide
     * @see #getSystemService(String)
     */
    @SystemApi
    public static final String WALLPAPER_EFFECTS_GENERATION_SERVICE =
            "wallpaper_effects_generation";

    /**
     * Used to access {@link MusicRecognitionManagerService}.
     *
     * @hide
     * @see #getSystemService(String)
     */
    @SystemApi
    public static final String MUSIC_RECOGNITION_SERVICE = "music_recognition";

    /**
     * Official published name of the (internal) permission service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    @SystemApi
    public static final String PERMISSION_SERVICE = "permission";

    /**
     * Official published name of the legacy (internal) permission service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    //@SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
    public static final String LEGACY_PERMISSION_SERVICE = "legacy_permission";

    /**
     * Official published name of the (internal) permission controller service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    @SystemApi
    public static final String PERMISSION_CONTROLLER_SERVICE = "permission_controller";

    /**
     * Official published name of the (internal) permission checker service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    public static final String PERMISSION_CHECKER_SERVICE = "permission_checker";

    /**
     * Official published name of the (internal) permission enforcer service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    public static final String PERMISSION_ENFORCER_SERVICE = "permission_enforcer";

    /**
     * Use with {@link #getSystemService(String) to retrieve an
     * {@link android.apphibernation.AppHibernationManager}} for
     * communicating with the hibernation service.
     * @hide
     *
     * @see #getSystemService(String)
     */
    @SystemApi
    public static final String APP_HIBERNATION_SERVICE = "app_hibernation";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.app.backup.IBackupManager IBackupManager} for communicating
     * with the backup mechanism.
     * @hide
     *
     * @see #getSystemService(String)
     */
    @SystemApi
    public static final String BACKUP_SERVICE = "backup";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.content.rollback.RollbackManager} for communicating
     * with the rollback manager
     *
     * @see #getSystemService(String)
     * @hide
     */
    @SystemApi
    public static final String ROLLBACK_SERVICE = "rollback";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.scheduling.RebootReadinessManager} for communicating
     * with the reboot readiness detector.
     *
     * @see #getSystemService(String)
     * @hide
     */
    @SystemApi
    public static final String REBOOT_READINESS_SERVICE = "reboot_readiness";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.os.DropBoxManager} instance for recording
     * diagnostic logs.
     * @see #getSystemService(String)
     */
    public static final String DROPBOX_SERVICE = "dropbox";

    /**
     * System service name for BackgroundInstallControlService. This service supervises the MBAs
     * on device and provides the related metadata of the MBAs.
     *
     * @hide
     */
    @SuppressLint("ServiceName")
    public static final String BACKGROUND_INSTALL_CONTROL_SERVICE = "background_install_control";

    /**
     * System service name for BinaryTransparencyService. This is used to retrieve measurements
     * pertaining to various pre-installed and system binaries on device for the purposes of
     * providing transparency to the user.
     *
     * @hide
     */
    @SuppressLint("ServiceName")
    public static final String BINARY_TRANSPARENCY_SERVICE = "transparency";

    /**
     * System service name for the DeviceIdleManager.
     * @see #getSystemService(String)
     * @hide
     */
    @TestApi
    @SuppressLint("ServiceName")  // TODO: This should be renamed to DEVICE_IDLE_SERVICE
    public static final String DEVICE_IDLE_CONTROLLER = "deviceidle";

    /**
     * System service name for the PowerWhitelistManager.
     *
     * @see #getSystemService(String)
     * @hide
     */
    @TestApi
    @Deprecated
    @SuppressLint("ServiceName")
    public static final String POWER_WHITELIST_MANAGER = "power_whitelist";

    /**
     * System service name for the PowerExemptionManager.
     *
     * @see #getSystemService(String)
     * @hide
     */
    @TestApi
    public static final String POWER_EXEMPTION_SERVICE = "power_exemption";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.admin.DevicePolicyManager} for working with global
     * device policy management.
     *
     * @see #getSystemService(String)
     */
    public static final String DEVICE_POLICY_SERVICE = "device_policy";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.UiModeManager} for controlling UI modes.
     *
     * @see #getSystemService(String)
     */
    public static final String UI_MODE_SERVICE = "uimode";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.DownloadManager} for requesting HTTP downloads.
     *
     * @see #getSystemService(String)
     */
    public static final String DOWNLOAD_SERVICE = "download";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.os.BatteryManager} for managing battery state.
     *
     * @see #getSystemService(String)
     */
    public static final String BATTERY_SERVICE = "batterymanager";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.nfc.NfcManager} for using NFC.
     *
     * @see #getSystemService(String)
     */
    public static final String NFC_SERVICE = "nfc";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.bluetooth.BluetoothManager} for using Bluetooth.
     *
     * @see #getSystemService(String)
     */
    public static final String BLUETOOTH_SERVICE = "bluetooth";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.net.sip.SipManager} for accessing the SIP related service.
     *
     * @see #getSystemService(String)
     */
    /** @hide */
    public static final String SIP_SERVICE = "sip";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.hardware.usb.UsbManager} for access to USB devices (as a USB host)
     * and for controlling this device's behavior as a USB device.
     *
     * @see #getSystemService(String)
     * @see android.hardware.usb.UsbManager
     */
    public static final String USB_SERVICE = "usb";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * Use with {@link #getSystemService} to retrieve a {@link
     * android.debug.AdbManager} for access to ADB debug functions.
     *
     * @see #getSystemService(String)
     * @see android.debug.AdbManager
     *
     * @hide
     */
    public static final String ADB_SERVICE = "adb";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.hardware.SerialManager} for access to serial ports.
     *
     * @see #getSystemService(String)
     * @see android.hardware.SerialManager
     *
     * @hide
     */
    public static final String SERIAL_SERVICE = "serial";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.hdmi.HdmiControlManager} for controlling and managing
     * HDMI-CEC protocol.
     *
     * @see #getSystemService(String)
     * @see android.hardware.hdmi.HdmiControlManager
     * @hide
     */
    @SystemApi
    public static final String HDMI_CONTROL_SERVICE = "hdmi_control";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.input.InputManager} for interacting with input devices.
     *
     * @see #getSystemService(String)
     * @see android.hardware.input.InputManager
     */
    public static final String INPUT_SERVICE = "input";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.display.DisplayManager} for interacting with display devices.
     *
     * @see #getSystemService(String)
     * @see android.hardware.display.DisplayManager
     */
    public static final String DISPLAY_SERVICE = "display";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.display.ColorDisplayManager} for controlling color transforms.
     *
     * @see #getSystemService(String)
     * @see android.hardware.display.ColorDisplayManager
     * @hide
     */
    public static final String COLOR_DISPLAY_SERVICE = "color_display";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.os.UserManager} for managing users on devices that support multiple users.
     *
     * @see #getSystemService(String)
     * @see android.os.UserManager
     */
    public static final String USER_SERVICE = "user";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.content.pm.LauncherApps} for querying and monitoring launchable apps across
     * profiles of a user.
     *
     * @see #getSystemService(String)
     * @see android.content.pm.LauncherApps
     */
    public static final String LAUNCHER_APPS_SERVICE = "launcherapps";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.content.RestrictionsManager} for retrieving application restrictions
     * and requesting permissions for restricted operations.
     * @see #getSystemService(String)
     * @see android.content.RestrictionsManager
     */
    public static final String RESTRICTIONS_SERVICE = "restrictions";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.AppOpsManager} for tracking application operations
     * on the device.
     *
     * @see #getSystemService(String)
     * @see android.app.AppOpsManager
     */
    public static final String APP_OPS_SERVICE = "appops";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link android.app.role.RoleManager}
     * for managing roles.
     *
     * @see #getSystemService(String)
     * @see android.app.role.RoleManager
     */
    public static final String ROLE_SERVICE = "role";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.camera2.CameraManager} for interacting with
     * camera devices.
     *
     * @see #getSystemService(String)
     * @see android.hardware.camera2.CameraManager
     */
    public static final String CAMERA_SERVICE = "camera";

    /**
     * {@link android.print.PrintManager} for printing and managing
     * printers and print tasks.
     *
     * @see #getSystemService(String)
     * @see android.print.PrintManager
     */
    public static final String PRINT_SERVICE = "print";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.companion.CompanionDeviceManager} for managing companion devices
     *
     * @see #getSystemService(String)
     * @see android.companion.CompanionDeviceManager
     */
    public static final String COMPANION_DEVICE_SERVICE = "companiondevice";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.companion.virtual.VirtualDeviceManager} for managing virtual devices.
     *
     * On devices without {@link PackageManager#FEATURE_COMPANION_DEVICE_SETUP}
     * system feature the {@link #getSystemService(String)} will return {@code null}.
     *
     * @see #getSystemService(String)
     * @see android.companion.virtual.VirtualDeviceManager
     */
    @SuppressLint("ServiceName")
    public static final String VIRTUAL_DEVICE_SERVICE = "virtualdevice";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.ConsumerIrManager} for transmitting infrared
     * signals from the device.
     *
     * @see #getSystemService(String)
     * @see android.hardware.ConsumerIrManager
     */
    public static final String CONSUMER_IR_SERVICE = "consumer_ir";

    /**
     * {@link android.app.trust.TrustManager} for managing trust agents.
     * @see #getSystemService(String)
     * @see android.app.trust.TrustManager
     * @hide
     */
    public static final String TRUST_SERVICE = "trust";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.media.tv.interactive.TvInteractiveAppManager} for interacting with TV
     * interactive applications on the device.
     *
     * @see #getSystemService(String)
     * @see android.media.tv.interactive.TvInteractiveAppManager
     */
    public static final String TV_INTERACTIVE_APP_SERVICE = "tv_interactive_app";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.media.tv.TvInputManager} for interacting with TV inputs
     * on the device.
     *
     * @see #getSystemService(String)
     * @see android.media.tv.TvInputManager
     */
    public static final String TV_INPUT_SERVICE = "tv_input";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.media.tv.TunerResourceManager} for interacting with TV
     * tuner resources on the device.
     *
     * @see #getSystemService(String)
     * @see android.media.tv.TunerResourceManager
     * @hide
     */
    public static final String TV_TUNER_RESOURCE_MGR_SERVICE = "tv_tuner_resource_mgr";

    /**
     * {@link android.net.NetworkScoreManager} for managing network scoring.
     * @see #getSystemService(String)
     * @see android.net.NetworkScoreManager
     * @deprecated see
     * <a href="{@docRoot}guide/topics/connectivity/wifi-suggest">Wi-Fi Suggestion API</a>
     * for alternative API to propose WiFi networks.
     * @hide
     */
    @SystemApi
    @Deprecated
    public static final String NETWORK_SCORE_SERVICE = "network_score";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.app.usage.UsageStatsManager} for querying device usage stats.
     *
     * @see #getSystemService(String)
     * @see android.app.usage.UsageStatsManager
     */
    public static final String USAGE_STATS_SERVICE = "usagestats";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.app.job.JobScheduler} instance for managing occasional
     * background tasks.
     * @see #getSystemService(String)
     * @see android.app.job.JobScheduler
     */
    public static final String JOB_SCHEDULER_SERVICE = "jobscheduler";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.tare.EconomyManager} instance for understanding economic standing.
     * @see #getSystemService(String)
     * @hide
     * @see android.app.tare.EconomyManager
     */
    public static final String RESOURCE_ECONOMY_SERVICE = "tare";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.service.persistentdata.PersistentDataBlockManager} instance
     * for interacting with a storage device that lives across factory resets.
     *
     * @see #getSystemService(String)
     * @see android.service.persistentdata.PersistentDataBlockManager
     * @hide
     */
    @SystemApi
    public static final String PERSISTENT_DATA_BLOCK_SERVICE = "persistent_data_block";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.service.oemlock.OemLockManager} instance for managing the OEM lock.
     *
     * @see #getSystemService(String)
     * @see android.service.oemlock.OemLockManager
     * @hide
     */
    @SystemApi
    public static final String OEM_LOCK_SERVICE = "oem_lock";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.media.projection.MediaProjectionManager} instance for managing
     * media projection sessions.
     * @see #getSystemService(String)
     * @see android.media.projection.MediaProjectionManager
     */
    public static final String MEDIA_PROJECTION_SERVICE = "media_projection";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.media.midi.MidiManager} for accessing the MIDI service.
     *
     * @see #getSystemService(String)
     */
    public static final String MIDI_SERVICE = "midi";


    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.radio.RadioManager} for accessing the broadcast radio service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    public static final String RADIO_SERVICE = "broadcastradio";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.os.HardwarePropertiesManager} for accessing the hardware properties service.
     *
     * @see #getSystemService(String)
     */
    public static final String HARDWARE_PROPERTIES_SERVICE = "hardware_properties";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.os.ThermalService} for accessing the thermal service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    public static final String THERMAL_SERVICE = "thermalservice";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.os.PerformanceHintManager} for accessing the performance hinting service.
     *
     * @see #getSystemService(String)
     */
    public static final String PERFORMANCE_HINT_SERVICE = "performance_hint";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.content.pm.ShortcutManager} for accessing the launcher shortcut service.
     *
     * @see #getSystemService(String)
     * @see android.content.pm.ShortcutManager
     */
    public static final String SHORTCUT_SERVICE = "shortcut";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.hardware.location.ContextHubManager} for accessing context hubs.
     *
     * @see #getSystemService(String)
     * @see android.hardware.location.ContextHubManager
     *
     * @hide
     */
    @SystemApi
    public static final String CONTEXTHUB_SERVICE = "contexthub";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.os.health.SystemHealthManager} for accessing system health (battery, power,
     * memory, etc) metrics.
     *
     * @see #getSystemService(String)
     */
    public static final String SYSTEM_HEALTH_SERVICE = "systemhealth";

    /**
     * Gatekeeper Service.
     * @hide
     */
    public static final String GATEKEEPER_SERVICE = "android.service.gatekeeper.IGateKeeperService";

    /**
     * Service defining the policy for access to device identifiers.
     * @hide
     */
    public static final String DEVICE_IDENTIFIERS_SERVICE = "device_identifiers";

    /**
     * Service to report a system health "incident"
     * @hide
     */
    public static final String INCIDENT_SERVICE = "incident";

    /**
     * Service to assist incidentd and dumpstated in reporting status to the user
     * and in confirming authorization to take an incident report or bugreport
     * @hide
     */
    public static final String INCIDENT_COMPANION_SERVICE = "incidentcompanion";

    /**
     * Service to assist {@link android.app.StatsManager} that lives in system server.
     * @hide
     */
    public static final String STATS_MANAGER_SERVICE = "statsmanager";

    /**
     * Service to assist statsd in obtaining general stats.
     * @hide
     */
    public static final String STATS_COMPANION_SERVICE = "statscompanion";

    /**
     * Service to assist statsd in logging atoms from bootstrap atoms.
     * @hide
     */
    public static final String STATS_BOOTSTRAP_ATOM_SERVICE = "statsbootstrap";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an {@link android.app.StatsManager}.
     * @hide
     */
    @SystemApi
    public static final String STATS_MANAGER = "stats";

    /**
     * Use with {@link android.os.ServiceManager.getService()} to retrieve a
     * {@link IPlatformCompat} IBinder for communicating with the platform compat service.
     * @hide
     */
    public static final String PLATFORM_COMPAT_SERVICE = "platform_compat";

    /**
     * Use with {@link android.os.ServiceManager.getService()} to retrieve a
     * {@link IPlatformCompatNative} IBinder for native code communicating with the platform compat
     * service.
     * @hide
     */
    public static final String PLATFORM_COMPAT_NATIVE_SERVICE = "platform_compat_native";

    /**
     * Service to capture a bugreport.
     * @see #getSystemService(String)
     * @see android.os.BugreportManager
     */
    public static final String BUGREPORT_SERVICE = "bugreport";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.content.om.OverlayManager} for managing overlay packages.
     *
     * @see #getSystemService(String)
     * @see android.content.om.OverlayManager
     */
    public static final String OVERLAY_SERVICE = "overlay";

    /**
     * Use with {@link #getSystemService(String)} to manage resources.
     *
     * @see #getSystemService(String)
     * @see com.android.server.resources.ResourcesManagerService
     * @hide
     */
    public static final String RESOURCES_SERVICE = "resources";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {android.os.IIdmap2} for managing idmap files (used by overlay
     * packages).
     *
     * @see #getSystemService(String)
     * @hide
     */
    public static final String IDMAP_SERVICE = "idmap";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link VrManager} for accessing the VR service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    @SystemApi
    public static final String VR_SERVICE = "vrmanager";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.content.pm.CrossProfileApps} for cross profile operations.
     *
     * @see #getSystemService(String)
     */
    public static final String CROSS_PROFILE_APPS_SERVICE = "crossprofileapps";

    /**
     * Use with {@link #getSystemService} to retrieve a
     * {@link android.se.omapi.ISecureElementService}
     * for accessing the SecureElementService.
     *
     * @hide
     */
    @SystemApi
    public static final String SECURE_ELEMENT_SERVICE = "secure_element";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.timedetector.TimeDetector}.
     * @hide
     *
     * @see #getSystemService(String)
     */
    public static final String TIME_DETECTOR_SERVICE = "time_detector";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.timezonedetector.TimeZoneDetector}.
     * @hide
     *
     * @see #getSystemService(String)
     */
    public static final String TIME_ZONE_DETECTOR_SERVICE = "time_zone_detector";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link TimeManager}.
     * @hide
     *
     * @see #getSystemService(String)
     */
    @SystemApi
    @SuppressLint("ServiceName")
    public static final String TIME_MANAGER_SERVICE = "time_manager";

    /**
     * Binder service name for {@link AppBindingService}.
     * @hide
     */
    public static final String APP_BINDING_SERVICE = "app_binding";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.telephony.ims.ImsManager}.
     */
    public static final String TELEPHONY_IMS_SERVICE = "telephony_ims";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.os.SystemConfigManager}.
     * @hide
     */
    @SystemApi
    public static final String SYSTEM_CONFIG_SERVICE = "system_config";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.telephony.ims.RcsMessageManager}.
     * @hide
     */
    public static final String TELEPHONY_RCS_MESSAGE_SERVICE = "ircsmessage";

     /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.os.image.DynamicSystemManager}.
     * @hide
     */
    public static final String DYNAMIC_SYSTEM_SERVICE = "dynamic_system";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.app.blob.BlobStoreManager} for contributing and accessing data blobs
     * from the blob store maintained by the system.
     *
     * @see #getSystemService(String)
     * @see android.app.blob.BlobStoreManager
     */
    public static final String BLOB_STORE_SERVICE = "blob_store";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link TelephonyRegistryManager}.
     * @hide
     */
    public static final String TELEPHONY_REGISTRY_SERVICE = "telephony_registry";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.os.BatteryStatsManager}.
     * @hide
     */
    @SystemApi
    @SuppressLint("ServiceName")
    public static final String BATTERY_STATS_SERVICE = "batterystats";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.app.appsearch.AppSearchManager} for
     * indexing and querying app data managed by the system.
     *
     * @see #getSystemService(String)
     */
    public static final String APP_SEARCH_SERVICE = "app_search";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.content.integrity.AppIntegrityManager}.
     * @hide
     */
    @SystemApi
    public static final String APP_INTEGRITY_SERVICE = "app_integrity";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.content.pm.DataLoaderManager}.
     * @hide
     */
    public static final String DATA_LOADER_MANAGER_SERVICE = "dataloader_manager";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.os.incremental.IncrementalManager}.
     * @hide
     */
    public static final String INCREMENTAL_SERVICE = "incremental";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.security.attestationverification.AttestationVerificationManager}.
     * @see #getSystemService(String)
     * @see android.security.attestationverification.AttestationVerificationManager
     * @hide
     */
    public static final String ATTESTATION_VERIFICATION_SERVICE = "attestation_verification";

    /**
     * Use with {@link #getSystemService(String)} to retrieve an
     * {@link android.security.FileIntegrityManager}.
     * @see #getSystemService(String)
     * @see android.security.FileIntegrityManager
     */
    public static final String FILE_INTEGRITY_SERVICE = "file_integrity";

    /**
     * Binder service for remote key provisioning.
     *
     * @see android.frameworks.rkp.IRemoteProvisioning
     * @hide
     */
    public static final String REMOTE_PROVISIONING_SERVICE = "remote_provisioning";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.hardware.lights.LightsManager} for controlling device lights.
     *
     * @see #getSystemService(String)
     * @hide
     */
    public static final String LIGHTS_SERVICE = "lights";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.uwb.UwbManager}.
     *
     * @see #getSystemService(String)
     * @hide
     */
    @SystemApi
    public static final String UWB_SERVICE = "uwb";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.DreamManager} for controlling Dream states.
     *
     * @see #getSystemService(String)

     * @hide
     */
    @TestApi
    public static final String DREAM_SERVICE = "dream";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.telephony.SmsManager} for accessing Sms functionality.
     *
     * @see #getSystemService(String)

     * @hide
     */
    public static final String SMS_SERVICE = "sms";

    /**
     * Use with {@link #getSystemService(String)} to access a {@link PeopleManager} to interact
     * with your published conversations.
     *
     * @see #getSystemService(String)
     */
    public static final String PEOPLE_SERVICE = "people";

    /**
     * Use with {@link #getSystemService(String)} to access device state service.
     *
     * @see #getSystemService(String)
     * @hide
     */
    public static final String DEVICE_STATE_SERVICE = "device_state";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.media.metrics.MediaMetricsManager} for interacting with media metrics
     * on the device.
     *
     * @see #getSystemService(String)
     * @see android.media.metrics.MediaMetricsManager
     */
    public static final String MEDIA_METRICS_SERVICE = "media_metrics";

    /**
     * Use with {@link #getSystemService(String)} to access system speech recognition service.
     *
     * @see #getSystemService(String)
     * @hide
    */
    public static final String SPEECH_RECOGNITION_SERVICE = "speech_recognition";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link GameManager}.
     *
     * @see #getSystemService(String)
     */
    public static final String GAME_SERVICE = "game";

    /**
     * Use with {@link #getSystemService(String)} to access
     * {@link android.content.pm.verify.domain.DomainVerificationManager} to retrieve approval and
     * user state for declared web domains.
     *
     * @see #getSystemService(String)
     * @see android.content.pm.verify.domain.DomainVerificationManager
     */
    public static final String DOMAIN_VERIFICATION_SERVICE = "domain_verification";

    /**
     * Use with {@link #getSystemService(String)} to access
     * {@link android.view.displayhash.DisplayHashManager} to handle display hashes.
     *
     * @see #getSystemService(String)
     */
    public static final String DISPLAY_HASH_SERVICE = "display_hash";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.LocaleManager}.
     *
     * @see #getSystemService(String)
     */
    public static final String LOCALE_SERVICE = "locale";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a {@link
     * android.safetycenter.SafetyCenterManager} instance for interacting with the safety center.
     *
     * @see #getSystemService(String)
     * @see android.safetycenter.SafetyCenterManager
     * @hide
     */
    @SystemApi
    public static final String SAFETY_CENTER_SERVICE = "safety_center";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.nearby.NearbyManager} to discover nearby devices.
     *
     * @see #getSystemService(String)
     * @see android.nearby.NearbyManager
     * @hide
     */
    @SystemApi
    public static final String NEARBY_SERVICE = "nearby";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.ambientcontext.AmbientContextManager}.
     *
     * @see #getSystemService(String)
     * @see AmbientContextManager
     * @hide
     */
    @SystemApi
    public static final String AMBIENT_CONTEXT_SERVICE = "ambient_context";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.app.wearable.WearableSensingManager}.
     *
     * @see #getSystemService(String)
     * @see WearableSensingManager
     * @hide
     */
    @SystemApi
    public static final String WEARABLE_SENSING_SERVICE = "wearable_sensing";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.health.connect.HealthConnectManager}.
     *
     * @see #getSystemService(String)
     * @see android.health.connect.HealthConnectManager
     */
    public static final String HEALTHCONNECT_SERVICE = "healthconnect";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.credentials.CredentialManager} to authenticate a user to your app.
     *
     * @see #getSystemService(String)
     * @see CredentialManager
     */
    public static final String CREDENTIAL_SERVICE = "credential";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.devicelock.DeviceLockManager}.
     *
     * @see #getSystemService(String)
     */
    public static final String DEVICE_LOCK_SERVICE = "device_lock";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.system.virtualmachine.VirtualMachineManager}.
     *
     * <p>On devices without {@link PackageManager#FEATURE_VIRTUALIZATION_FRAMEWORK} system feature
     * the {@link #getSystemService(String)} will return {@code null}.
     *
     * @see #getSystemService(String)
     * @see android.system.virtualmachine.VirtualMachineManager
     * @hide
     */
    @SystemApi
    public static final String VIRTUALIZATION_SERVICE = "virtualization";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link GrammaticalInflectionManager}.
     *
     * @see #getSystemService(String)
     */
    public static final String GRAMMATICAL_INFLECTION_SERVICE = "grammatical_inflection";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.telephony.satellite.SatelliteManager} for accessing satellite functionality.
     *
     * @see #getSystemService(String)
     * @see android.telephony.satellite.SatelliteManager
     * @hide
     */
    public static final String SATELLITE_SERVICE = "satellite";

    /**
     * Use with {@link #getSystemService(String)} to retrieve a
     * {@link android.net.wifi.sharedconnectivity.app.SharedConnectivityManager} for accessing
     * shared connectivity services.
     *
     * @see #getSystemService(String)
     * @see android.net.wifi.sharedconnectivity.app.SharedConnectivityManager
     * @hide
     */
    @SystemApi
    public static final String SHARED_CONNECTIVITY_SERVICE = "shared_connectivity";