Android System Properties

properties_system_android.md

Key	Description	Uses
audio.safemedia.force	true for safe media volume	https://android.googlesource.com/platform/frameworks/base/+/master/services/core/java/com/android/server/audio/AudioService.java
config.disable_bluetooth	-	SystemServer
config.disable_location	-	SystemServer
config.disable_media	-	SystemServer SoundPool ViewRootImpl
config.disable_network	-	SystemServer ContentService
config.disable_networktime	-	SystemServer
config.disable_noncore	-	SystemServer
config.disable_renderscript	-	RenderScript
config.disable_storage	true if storage is disabled	Environment SystemServer
config.disable_systemui	-	SystemServer
config.disable_telephony	-	SystemServer
config.override_forced_orient	-	PhoneWindowManager
ctl.restart	service:arg1 arg2 arg3 (examples: "pre-recovery", "bugreport", "media", "zygote", "bootanim", etc.)	SystemService
ctl.start	service:arg1 arg2 arg3 (examples: "pre-recovery", "bugreport", "media", "zygote", "bootanim", etc.)	PowerManagerService
ctl.stop	service:arg1 arg2 arg3 (examples: "pre-recovery", "bugreport", "media", "zygote", "bootanim", etc.)	SystemService
dalvik.vm.extra-opts	-	Am
dalvik.vm.heapgrowthlimit	vm heap size in megabytes	ActivityManager
dalvik.vm.heapsize	dalvik.vm.heapsize	ActivityManager
dalvik.vm.stack-trace-file	File to dump kernel stacktraces to	Watchdog
db.log.slow_query_threshold	Determines whether a query should be logged.	SQLiteDebug
debug.choreographer.frametime	Enable/disable using the frame time instead of returning now.	Choreographer
debug.choreographer.skipwarning	Set a limit to warn about skipped frames.	Choreographer
debug.choreographer.vsync	Enable/disable vsync for animations and drawing.	Choreographer
debug.doze.component	-	DreamManagerService
debug.force_rtl	Force right to left layout	TextUtils Settings
debug.freemem	Allow freemem to be overridden by debug.freemem for testing	DeviceStorageMonitorService
debug.hwui.overdraw	Controls overdraw debugging. Possible values: "false", to disable overdraw debugging. "show", to show overdraw areas on screen. "count", to display an overdraw counter	HardwareRenderer
debug.hwui.print_config	System property used to debug EGL configuration choice.	HardwareRenderer
debug.hwui.profile.maxframes	System property used to specify the number of frames to be used when doing hardware rendering profiling.	HardwareRenderer
debug.hwui.profile	-	HardwareRenderer ThreadedRenderer
debug.hwui.render_dirty_regions	System property used to enable or disable dirty regions invalidation.	HardwareRenderer
debug.hwui.show_dirty_regions	Turn on to draw dirty regions every other frame.	HardwareRenderer
debug.hwui.show_layers_updates	Turn on to flash hardware layers when they update.	HardwareRenderer
debug.hwui.show_non_rect_clip	Turn on to debug non-rectangular clip operations. Possible values: "hide", to disable this debug mode. "highlight", highlight drawing commands tested against a non-rectangular clip. "stencil", renders the clip region on screen when set	HardwareRenderer
debug.layout	When set to true, apps will draw debugging information about their layouts.	ViewRootImpl
debug.orientation.log	true to log messages from WindowOrientationListener	WindowOrientationListener
debug.rs.forcecompat	-	RenderScript
debug.second-display.pkg	For debugging purposes, if the activity's package name contains the value of the "debug.use-second-display" system property as a substring, then show its content on a secondary display if there is one.	ActivityThread
debug.sqlite.journalmode	The default journal mode when WAL is not in use.	SQLiteGlobal
debug.sqlite.journalsizelimit	The journal size limit in bytes	SQLiteGlobal
debug.sqlite.pagesize	The default page size to use when creating a database. The default value is the block size of "/data".	SQLiteGlobal
debug.sqlite.syncmode	The default database synchronization mode when WAL is not in use.	SQLiteGlobal
debug.sqlite.syncmode	The default database synchronization mode when WAL is not in use.	SQLiteGlobal
debug.sqlite.wal.autocheckpoint	The connection pool size when in WAL mode.	SQLiteGlobal
debug.sqlite.wal.syncmode	The database synchronization mode when in WAL mode.	SQLiteGlobal
debug.velocitytracker.alt	key used to specify an alternate velocity tracker strategy to plot alongside the default one. Useful for testing and comparison purposes.	PointerLocationView
doze.pickup.proxcheck	-	DozeParameters
doze.pickup.vibration.threshold	-	DozeParameters
doze.pulse.delay.in.pickup	-	DozeParameters
doze.pulse.delay.in	-	DozeParameters
doze.pulse.duration.in.pickup	-	DozeParameters
doze.pulse.duration.in	-	DozeParameters
doze.pulse.duration.out	-	DozeParameters
doze.pulse.duration.visible	-	DozeParameters
doze.pulse.notifications	-	DozeParameters
doze.pulse.pickup	-	DozeParameters
doze.pulse.proxcheck	-	DozeParameters
doze.pulse.schedule.resets	-	DozeParameters
doze.pulse.schedule	-	DozeParameters
doze.pulse.sigmotion	-	DozeParameters
doze.vibrate.pickup	-	DozeParameters
doze.vibrate.sigmotion	-	DozeParameters
drm.service.enabled	Whether DRM service is enabled	MediaScanner
fw.power_user_switcher	Add users to menu	GlobalActions
fw.show_hidden_users	true if this user can be switched to	UserInfo
fw.show_multiuserui	whether the system supports multiple users.	UserManager
gsm.current.phone-type	-	TelephonyProperties
gsm.network.type	Indicates the available radio technology. Values include: "unknown", "GPRS", "EDGE" and "UMTS"	TelephonyProperties
gsm.operator.alpha	Alpha name of current registered operator. Availability: when registered to a network. Result may be unreliable on CDMA networks.	TelephonyProperties
gsm.operator.idpstring	the international dialing prefix of current operator network	TelephonyProperties
gsm.operator.iso-country	The ISO country code equivalent of the current registered operator's MCC (Mobile Country Code)	TelephonyProperties
gsm.operator.isroaming	true if the device is considered roaming on this network for GSM purposes	TelephonyProperties
gsm.operator.numeric	Numeric name (MCC+MNC) of current registered operator.	TelephonyProperties
gsm.sim.operator.alpha	Service Provider Name	TelephonyProperties
gsm.sim.operator.iso-country	ISO country code equivalent for the SIM provider's country code	TelephonyProperties
gsm.sim.operator.numeric	The MCC+MNC (mobile country code+mobile network code) of the provider of the SIM. 5 or 6 decimal digits.	TelephonyProperties
gsm.sim.state	One of "UNKNOWN", "ABSENT", "PIN_REQUIRED", "PUK_REQUIRED", "NETWORK_LOCKED", or "READY"	TelephonyProperties
gsm.version.baseband	Baseband version. This property is available any time radio is on.	TelephonyProperties
gsm.version.ril-impl	Radio Interface Layer (RIL) library implementation.	TelephonyProperties
keyguard.no_require_sim	-	KeyguardViewMediator
lockscreen.rot_override	Flag to enable keyguard screen rotation	StatusBarWindowManager
log.closeguard.Animation	-	Animation
mms.transaction	Property to enable MMS Mode. default = silent, enable to = prompt	TelephonyProperties
net.dns1	-	ConnectivityService
net.dns2	-	ConnectivityService
net.dns3	-	ConnectivityService
net.dns4	-	ConnectivityService
net.hostname	Unique device name	ConnectivityService
net.qtaguid_enabled	Key that indicates if qtaguid bandwidth controls have been enabled	NetworkManagementSocketTagger NetworkManagementService BatteryStatsImpl
net.tcp.default_init_rwnd	-	ConnectivityService
net.tethering.noprovisioning	-	TetherUtil TelephonyManager
net.tethering.noprovisioning	-	TetherSettings
operator.ismanual	true if the device is on a manually selected network	TelephonyProperties
persist.adb.notify	Flag to show the ADB debugging notification	UsbDeviceManager
persist.camera.legacy_perf	Enables performance tracking for SurfaceTextureRenderer	SurfaceTextureRenderer
persist.debug.wfd.enable	0, WFD is forcibly disabled on boot. 1, WFD is forcibly enabled on boot.	DisplayManagerService
persist.demo.hdmirotates	For demonstration purposes, allow rotation of the external display to follow the built-in display.	LocalDisplayAdapter
persist.demo.hdmirotation	For demo purposes, allow the rotation of the HDMI display to be controlled.	PhoneWindowManager
persist.demo.hdmirotation	For demonstration purposes, allow rotation of the external display.	LocalDisplayAdapter
persist.demo.hdmirotationlock	-	PhoneWindowManager
persist.demo.remoterotation	For demo purposes, allow the rotation of the remote display to be controlled.	PhoneWindowManager
persist.demo.remoterotation	For demonstration purposes, allow rotation of the external display.	VirtualDisplayAdapter
persist.demo.rotationlock	-	PhoneWindowManager
persist.demo.singledisplay	Single display demo mode	DisplayManagerService
persist.netmon.linger	Linger timeout on NetworkMonitor	NetworkMonitor
persist.netmon.reeval_delay	Negative values disable reevaluation.	NetworkMonitor
persist.power.usetwilightadj	true if the twilight service should be used to adjust screen brightness policy. This setting is experimental and disabled by default.	PowerManager
persist.radio.cdma.msgid	Track CDMA SMS message id numbers to ensure they increment monotonically, regardless of reboots.	TelephonyProperties
persist.radio.default.sub	Property to store default subscription.	TelephonyProperties
persist.radio.imsregrequired	Hide lockdown VPN on devices that require IMS authentication	VpnSettings
persist.radio.multisim.config	Property to set multi sim feature.	TelephonyProperties
persist.radio.reset_on_switch	Set to true to indicate that the modem needs to be reset when there is a radio technology change.	TelephonyProperties
persist.radio.test-csim	Set to true to indicate a test CSIM card is used in the device. This property is for testing purpose only. This should not be defined in commercial configuration.	TelephonyProperties
persist.security.efs.enabled	whether the Encrypted File System feature is enabled on the device or not	Environment
persist.service.adb.enable	-	UsbDeviceManager
persist.sys.dalvik.vm.lib.2	-	SystemServer ProcessStats
persist.sys.hdmi.addr.playback	-	HdmiCecLocalDevicePlayback Constants
persist.sys.hdmi.addr.tv	-	HdmiCecLocalDevicePlayback Constants
persist.sys.profiler_depth	-	SamplingProfilerIntegration
persist.sys.profiler_ms	setting this secure property will start or stop sampling profiler, as well as adjust the the time between taking snapshots.	SamplingProfilerIntegration
persist.sys.safemode	Indicates whether we are rebooting into safe mode	ShutdownThread
persist.sys.strictmode.disable	Boolean system property to disable strict mode checks outright. 'true' to force disable; 'false' has no effect on other enable/disable policy.	StrictMode
persist.sys.strictmode.nonssl	-	StrictMode
persist.sys.strictmode.visual	The boolean system property to control screen flashes on violations.	StrictMode
persist.sys.timezone	-	RuntimeInit
persist.sys.timezone	Timezone property	AlarmManagerService
persist.sys.ui.hw	-	Window
persist.sys.usb.config	-	UsbDeviceManager
persist.sys.usb.config	The current default USB function name (seperated with a comma).	UsbManager
persist.sys.uts-test-mode	-	PhoneWindowManager
persist.sys.webview.vmsize	Chromium WebView VM size	WebViewFactory
persist.test.voice_interaction	false if voice interaction is not supported	VoiceInteractionManagerService
qemu.hw.mainkeys	Used by the emulator to override if the device has a navigation bar	PhoneWindowManager
qemu.sf.lcd_density	qemu.sf.lcd_density can be used to override ro.sf.lcd_density when running in the emulator, allowing for dynamic configurations.	DisplayMetrics
ril.cdma.inecmmode	Indicate if phone is in emergency callback mode	TelephonyProperties
ril.ecclist	List of emergency numbers	PhoneNumberUtils
ro.adb.secure	-	UsbDeviceManager DevelopmentSettings
ro.audio.monitorOrientation	true to have the AudioService monitor the device orientation	AudioService
ro.audio.monitorRotation	true to have the AudioService monitor the device rotation	AudioService
ro.backup.disable	Product-level suppression of backup/restore	Trampoline
ro.baseband	-	EntropyMixer
ro.boot.bootreason	-	BootReceiver
ro.boot.hardware.sku	When hardware sku property exists, use regulatory_info_<sku> resource if valid.	RegulatoryInfoDisplayActivity
ro.bootloader	The system bootloader version number.	Build EntropyMixer
ro.bootmode	-	EntropyMixer
ro.bootmode	-	UsbDeviceManager
ro.build.date.utc	-	Build
ro.build.description	-	BugreportReceiver
ro.build.display.id	A build ID string meant for displaying to the user	Build
ro.build.fingerprint	-	EntropyMixer AssetAtlasService Build
ro.build.host	-	Build
ro.build.id	Either a changelist number, or a label like "M4-rc20"	Build
ro.build.user	-	Build
ro.build.version.all_codenames	-	Build
ro.build.version.incremental	The internal value used by the underlying source control to represent this build. E.g., a perforce changelist number or a git hash.	Build
ro.build.version.release	The user-visible version string. E.g., "1.0" or "3.4b5".	Build
ro.build.version.sdk	The user-visible SDK version of the framework; its possible values are defined in android.os.Build.VERSION_CODES.	Build
ro.carrier	-	EntropyMixer
ro.cdma.ecmexittimer	Indicate the timer value for exiting emergency callback mode	TelephonyProperties
ro.cdma.otaspnumschema	Defines the schema for the carrier specified OTASP number	TelephonyProperties
ro.com.android.dataroaming	-	TelephonyManager
ro.com.android.mobiledata	-	TelephonyManager
ro.com.android.wifi-watchlist	The Wi-Fi watchdog SSID list	DatabaseHelper
ro.common_time.allow_wifi	-	CommonTimeManagementService
ro.common_time.auto_disable	-	CommonTimeManagementService
ro.common_time.no_iface_timeout	-	CommonTimeManagementService
ro.common_time.server_prio	-	CommonTimeManagementService
ro.config.alarm_alert	Default alarm sound	MediaScanner
ro.config.license_path	The absolute path to "License" files for the Android OS	SettingsLicenseActivity
ro.config.low_ram	true for a low RAM device	ActivityManager
ro.config.max_starting_bg	Maximum number of services that is allowed to start in the background at the same time	ActiveServices
ro.config.media_vol_steps	Default media volume steps	AudioService
ro.config.notification_sound	Default notification sound	MediaScanner
ro.config.ringtone	Default ringtone sound	MediaScanner
ro.config.vc_call_vol_steps	Default call volume steps	MediaScanner AudioService
ro.config.wallpaper_component	-	WallpaperManager
ro.config.wallpaper	-	WallpaperManager
ro.crypto.state	Determine if the device supports encryption, even if it's set to default.	BootReceiver LockPatternUtils DevicePolicyManagerService
ro.dalvik.vm.isa.{abi}.features	The instruction set that should be used to compile dex code.	InstructionSets ApplicationPackageManager LoadedApk
ro.dalvik.vm.native.bridge	-	NativeLibraryHelper
ro.debuggable	-	Build BootReceiver ZygoteConnection
ro.emulator.circular	property used by emulator to determine display shape	WallpaperService ViewRootImpl
ro.error.receiver.default	System property defining default error report receiver	ApplicationErrorReport
ro.error.receiver.system.apps	System property defining error report receiver for system apps	ApplicationErrorReport
ro.factorytest	The current factory test mode (0=off, 1-low level, 2=high level).	FactoryTest ZygoteConnection
ro.frp.pst	Persistent data block property	SystemServer PersistentDataBlockService
ro.hardware.gps	-	GpsLocationProvider
ro.hardware	The name of the hardware (from the kernel command line or /proc).	Build EntropyMixer
ro.hdmi.device_type	Property name for the local device configurations.	HdmiControlService Constants
ro.kernel.android.tracing	Emulator trace profiling	RuntimeInit
ro.kernel.qemu	value will be "1" if the device is an emulator	SystemServer ImageWallpaper
ro.lockscreen.disable.default	-	LockSettingsService
ro.media.effect.bgdropper.adj	-	BackDropperFilter
ro.opengles.version	-	GLSurfaceView
ro.product.board	The name of the underlying board, like "goldfish".	Build
ro.product.brand	The consumer-visible brand with which the product/hardware will be associated, if any.	Build
ro.product.cpu.abilist	An ordered list of ABIs supported by this device. The most preferred ABI is the first element in the list.	Build
ro.product.cpu.abilist32	An ordered list of 32 bit ABIs supported by this device. The most preferred ABI is the first element in the list	Build
ro.product.cpu.abilist64	An ordered list of 64 bit ABIs supported by this device. The most preferred ABI is the first element in the list.	Build
ro.product.device	The name of the industrial design.	Build
ro.product.manufacturer	The manufacturer of the product/hardware.	Build
ro.product.model	The end-user-visible name for the end product.	Build
ro.product.name	The name of the overall product.	Build
ro.radio.noril	true if device is Wi-Fi only	ConnectivityService
ro.revision	-	BootReceiver
ro.revision	-	EntropyMixer
ro.ril.wake_lock_timeout	Property to override DEFAULT_WAKE_LOCK_TIMEOUT	TelephonyProperties
ro.runtime.firstboot	-	BootReceiver
ro.serialno	-	EntropyMixer
ro.serialno	-	UsbDeviceManager
ro.serialno	A hardware serial number, if available. Alphanumeric only, case-insensitive.	Build
ro.sf.lcd_density	The device density.	DisplayMetrics
ro.telephony.call_ring.delay	The number of milliseconds between CALL_RING notifications.	TelephonyProperties
ro.telephony.call_ring.multipl	Set to true for vendor RIL's that send multiple UNSOL_CALL_RING notifications.	TelephonyProperties
ro.telephony.default_network	-	RILConstants
ro.telephony.disable-call	Disable all calls including Emergency call when it set to true.	TelephonyProperties
ro.telephony.sim.count	Set to the sim count.	TelephonyProperties
ro.test_harness	true if device is running in a test harness	ActivityManager
ro.tether.denied	-	ConnectivityService
ro.vendor.build.fingerprint	-	Build
ro.zygote.disable_gl_preload	-	ZygoteInit
selinux.reload_policy	-	SELinuxPolicyInstallReceiver
sendbug.preferred.domain	-	BugreportReceiver
service.adb.tcp.port	Enable ADB over Wi-Fi	UsbDebuggingActivity
socket.relaxsslcheck	-	SSLCertificateSocketFactory
sync.local_sync_delay	-	SyncManager
sync.max_init_syncs	-	SyncManager
sync.max_regular_syncs	-	SyncManager
sync.max_time_per_sync	-	SyncManager
sync.notification_delay	-	SyncManager
sys.boot_completed	1 (true) if the system has sent BOOT_COMPLETE broadcast	SystemUIApplication
sys.max_texture_size	-	WallpaperManager
sys.powerctl	shutdown,reason|reboot,reason	PowerManagerService
sys.settings_secure_version	-	Settings SettingsProvider
sys.shutdown.requested	Provides shutdown assurance in case the system_server is killed	ShutdownThread
sys.sysctl.extra_free_kbytes	-	ProcessList
sys.usb.config	-	UsbDeviceManager
sys.usb.config	The enabled USB functions	UsbManager
sys.usb.state	-	UsbDeviceManager
system_init.startmountservice	-	SystemServer
telephony.lteOnCdmaDevice	-	TelephonyProperties
telephony.lteOnCdmaProductType	The contents of this property is the value of the kernel command line product_type variable that corresponds to a product that supports LTE on CDMA.	TelephonyProperties
telephony.sms.receive	Set to false to disable SMS receiving, default is the value of config_sms_capable	TelephonyProperties
telephony.sms.send	Set to false to disable SMS sending, default is the value of config_sms_capable	TelephonyProperties
telephony.test.ignore.nitz	Ignore RIL_UNSOL_NITZ_TIME_RECEIVED completely, used for debugging/testing.	TelephonyProperties
test.radios	-	DataUsageSummary
test.subscriberid	-	DataUsageSummary
viewroot.profile_rendering	Set this system property to true to force the view hierarchy to render at 60 Hz. This can be used to measure the potential framerate.	ViewRootImpl
vold.decrypt	-	UsbDeviceManager DevicePolicyManagerService SystemServer BootReceiver
vold.encrypt_progress	-	MountService