Permanently hide Android Status Bar

root android android-4.4-kitkat

I'm trying to hide the system Status Bar on an Android 4.4 device. This is for a kiosk-mode where my app will be the only app ever run on the device. The target device for now is a 2013 Nexus 7.

The device is rooted, and I've been able to completely remove the bottom Navigation Bar with some info from this post.

For the top Status Bar, everything I have tried only hides the bar temporarily. If my users motion down at the top of the screen, the status bar reappears. I don't want to allow them to see the time, get to settings or even see notifications.

Posts I've found and already tried:

  • Hide System Bar in Tablets
  • Permanently hide navigation bar on activity
  • Hide status bar on android
  • Disable/Hide status bar in Android

Any suggestions?

Ideally, I'd love to be able to edit build.prop to do this, since I'm already doing that for the navigation bar, and could do this at the same time. I'm trying to not have to build my own android image.

Update:

After some more work, this seems to depend somewhat on the exact build of android, or the device its running on.

Some devices, such as the Nexus series I've been working with allow the user to swipe to make the bar reappear.

However, I've recently tried this on a Verizon Eclipse, and the bar does not reappear, which is what I was looking for.

I'm still looking for a better solution to target all devices, but it will probably come down to creating my own build of android.


Solution 1:

We could not prevent the status appearing in full screen mode in kitkat devices, so made a hack which still suits the requirement ie block the status bar from expanding.

For that to work, the app was not made full screen. We put a overlay over status bar and consumed all input events. It prevented the status from expanding.

note:

  • customViewGroup is custom class which extends any layout(frame,relative layout etc) and consumes touch event.
  • to consume touch event override the onInterceptTouchEvent method of the view group and return true

Updated

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>

customViewGroup implementation Code :

WindowManager manager = ((WindowManager) getApplicationContext()
            .getSystemService(Context.WINDOW_SERVICE));

WindowManager.LayoutParams localLayoutParams = new WindowManager.LayoutParams();
localLayoutParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;
localLayoutParams.gravity = Gravity.TOP;
localLayoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|

            // this is to enable the notification to recieve touch events
            WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |

            // Draws over status bar
            WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;

    localLayoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
    localLayoutParams.height = (int) (50 * getResources()
            .getDisplayMetrics().scaledDensity);
    localLayoutParams.format = PixelFormat.TRANSPARENT;

    customViewGroup view = new customViewGroup(this);

    manager.addView(view, localLayoutParams);

Hope this helps you

Solution 2:

I did try the workaround provided by @gonglong, but I wasn't happy with the result because of a flash in the UI as the workaround kicked in.

Instead, I was able to do this as root:

settings put secure user_setup_complete 0

I think on a normal device, this would cause the initial device setup to start, but on my devices, I've removed that APK from system so that doesn't happen.

This isn't documented anywhere I can find, but has a nice effect, where the top settings UI can't be dragged down. The notifications area can still be dragged down.

Another setting that I found useful was:

settings put global device_provisioned 0

This hides the Airplane Mode and Silent Mode options from the Power menu, which is an added bonus for my application.

There might be more side effects, but I've yet to find any that matter to me.

Full List

This list was taken from a Nexus 7 2013 LTE running brand new Android 4.4.3 (KTU84L). The number in square brackets is the value when I pulled the db file, which was after basic setup device setup and enabling developer/USB, but before making any other changes in settings

This file was found at data/data/com.android.providers.settings/databases/settings.db

Note: Some URLS required adding an extra space character to bypass SO filters

system namespace

  • volume_music [11]
  • volume_ring [5]
  • volume_system [7]
  • volume_voice [4]
  • volume_alarm [6]
  • volume_notification [5]
  • volume_bluetooth_sco [7]
  • mode_ringer_streams_affected [174]
  • mute_streams_affected [46]
  • vibrate_when_ringing [0]
  • dim_screen [1]
  • dtmf_tone_type [0]
  • hearing_aid [0]
  • tty_mode [0]
  • screen_brightness [87]
  • screen_brightness_mode [1]
  • window_animation_scale [1.0]
  • transition_animation_scale [1.0]
  • accelerometer_rotation [1]
  • haptic_feedback_enabled [1]
  • notification_light_pulse [1]
  • dtmf_tone [1]
  • sound_effects_enabled [1]
  • lockscreen_sounds_enabled [1]
  • pointer_speed [0]
  • alarm_alert [content://media/internal/audio/media/11]
  • notification_sound [content://media/internal/audio/media/27]
  • ringtone [content://media/internal/audio/media/35]
  • next_alarm_formatted []
  • radio.data.stall.recovery.action [0]
  • screen_off_timeout [30000]

global namespace

  • airplane_mode_on [0]
  • airplane_mode_radios [cell,bluetooth,wifi,nfc,wimax]
  • airplane_mode_toggleable_radios [bluetooth,wifi,nfc]
  • auto_time [1]
  • auto_time_zone [1]
  • stay_on_while_plugged_in [0]
  • wifi_sleep_policy [2]
  • mode_ringer [2]
  • package_verifier_enable [1]
  • wifi_networks_available_notification_on [1]
  • bluetooth_on [0]
  • cdma_cell_broadcast_sms [1]
  • data_roaming [0]
  • mobile_data [1]
  • netstats_enabled [1]
  • install_non_market_apps [0]
  • usb_mass_storage_enabled [1]
  • wifi_max_dhcp_retry_count [9]
  • wifi_display_on [0]
  • lock_sound [/system/media/audio/ui/Lock.ogg]
  • unlock_sound [/system/media/audio/ui/Unlock.ogg]
  • power_sounds_enabled [1]
  • low_battery_sound [/system/media/audio/ui/LowBattery.ogg]
  • dock_sounds_enabled [0]
  • desk_dock_sound [/system/media/audio/ui/Dock.ogg]
  • desk_undock_sound [/system/media/audio/ui/Undock.ogg]
  • car_dock_sound [/system/media/audio/ui/Dock.ogg]
  • car_undock_sound [/system/media/audio/ui/Undock.ogg]
  • wireless_charging_started_sound [/system/media/audio/ui/WirelessChargingStarted.ogg]
  • dock_audio_media_enabled [1]
  • set_install_location [0]
  • default_install_location [0]
  • emergency_tone [0]
  • call_auto_retry [0]
  • preferred_network_mode [9]
  • subscription_mode [1]
  • low_battery_sound_timeout [3600000]
  • wifi_watchdog_on [1]
  • audio_safe_volume_state [1]
  • send_action_app_error [1]
  • web_autofill_query_url [http:// android.clients.google.com/proxy/webautofill]
  • sms_short_codes_content_url [http://www.gstatic.com/android/config_update/07172013-sms-blacklist.txt]
  • sms_short_codes_metadata_url [http://www.gstatic.com/android/config_update/07172013-sms-metadata.txt]
  • cert_pin_metadata_url [http://www.gstatic.com/android/config_update/10142013-metadata.txt]
  • cert_pin_content_url [http://www.gstatic.com/android/config_update/10142013-pins.txt]
  • wifi_on [1]
  • assisted_gps_enabled [1]
  • wifi_scan_always_enabled [1]
  • device_provisioned [1]
  • bugreport_in_power_menu [0]
  • development_settings_enabled [1]
  • adb_enabled [1]
  • wifi_country_code [us]

secure namespace

  • wifi_watchdog_watch_list [GoogleGuest]
  • mock_location [0]
  • backup_enabled [0]
  • backup_transport [com.google.android.backup/.BackupTransportService]
  • mount_play_not_snd [1]
  • mount_ums_autostart [0]
  • mount_ums_prompt [1]
  • mount_ums_notify_enabled [1]
  • accessibility_script_injection [0]
  • accessibility_web_content_key_bindings [0x13=0x01000100; 0x14=0x01010100; 0x15=0x02000001; 0x16=0x02010001; 0x200000013=0x02000601; 0x200000014=0x02010601; 0x200000015=0x03020101; 0x200000016=0x03010201; 0x200000023=0x02000301; 0x200000024=0x02010301; 0x200000037=0x03070201; 0x200000038=0x03000701:0x03010701:0x03020701;]
  • long_press_timeout [500]
  • touch_exploration_enabled [0]
  • speak_password [0]
  • accessibility_script_injection_url [https://ssl.gstatic.com/accessibility/javascript/android/AndroidVox_v1.js]
  • lockscreen.disabled [0]
  • screensaver_enabled [1]
  • screensaver_activate_on_dock [1]
  • screensaver_activate_on_sleep [0]
  • screensaver_components [com.google.android.deskclock/com.android.deskclock.Screensaver]
  • screensaver_default_component [com.google.android.deskclock/com.android.deskclock.Screensaver]
  • accessibility_display_magnification_enabled [0]
  • accessibility_display_magnification_scale [2.0]
  • accessibility_display_magnification_auto_update [1]
  • android_id [a0ef8b2a9ade982c]
  • enabled_input_methods [com.google.android.inputmethod.latin/com.android.inputmethod.latin.LatinIME:com.google.android.googlequicksearchbox/com.google.android.voicesearch.ime.VoiceInputMethodService]
  • input_methods_subtype_history []
  • selected_input_method_subtype [-1]
  • selected_spell_checker [com.google.android.inputmethod.latin/com.android.inputmethod.latin.spellcheck.AndroidSpellCheckerService]
  • selected_spell_checker_subtype [0]
  • lock_screen_owner_info_enabled [0]
  • voice_recognition_service [com.google.android.googlequicksearchbox/com.google.android.voicesearch.serviceapi.GoogleRecognitionService]
  • default_input_method [com.google.android.inputmethod.latin/com.android.inputmethod.latin.LatinIME]
  • enabled_print_services [com.google.android.apps.cloudprint/com.google.android.apps.cloudprint.printdialog.services.CloudPrintService:com.hp.android.printservice/com.hp.android.printservice.ServiceAndroidPrint]
  • enabled_on_first_boot_system_print_services [com.google.android.apps.cloudprint/com.google.android.apps.cloudprint.printdialog.services.CloudPrintService:com.hp.android.printservice/com.hp.android.printservice.ServiceAndroidPrint]
  • bluetooth_name [Nexus 7]
  • masterLocationPackagePrefixBlacklist [com.google.,com.semaphoremobile.zagat.android]
  • serial_blacklist [827,864]
  • dropbox:data_app_anr [disabled]
  • dropbox:data_app_wtf [disabled]
  • ssl_session_cache [file]
  • pubkey_blacklist [5f3ab33d55007054bc5e3e5553cd8d8465d77c61,783333c9687df63377efceddd82efa9101913e8e]
  • facelock_liveliness_recognition_threshold [2.2]
  • facelock_detection_threshold [0.0]
  • dropbox:data_app_crash [disabled]
  • masterLocationPackagePrefixWhitelist [com.google.android.gms]
  • lockscreen.options [enable_facelock]
  • facelock_max_center_movement [10.0]
  • bluetooth_address [AC:22:0B:A5:AF:3D]
  • bluetooth_addr_valid [1]
  • config_update_certificate [ truncated base64 content ]
  • location_providers_allowed [gps,network]
  • allowed_geolocation_origins [http://www.google.co.uk http:// www.google.com]
  • locationPackagePrefixBlacklist []
  • user_setup_complete [1]
  • locationPackagePrefixWhitelist []
  • last_setup_shown [eclair_1]

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