转载自： http://blog.163.com/fang_wang2005/blog/static/176928073201136105613638/
如何获取Android系统设置参数
下面以获取时间格式为例，来判断时间是24小时制还是12小时制
ContentResolver cv = this.getContentResolver();
String strTimeFormat = android.provider.Settings.System.getString(cv,
android.provider.Settings.System.TIME_12_24);
if(strTimeFormat.equals("24"))
{
Log.i("activity","24");
}
System的其他参数如下：
| Constants | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| String | ACCELEROMETER_ROTATION | Control whether the accelerometer will be used to change screen orientation. | |||||||||
| String | ADB_ENABLED | This constant is deprecated. Use ADB_ENABLED instead |
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| String | AIRPLANE_MODE_ON | Whether Airplane Mode is on. | |||||||||
| String | AIRPLANE_MODE_RADIOS | A comma separated list of radios that need to be disabled when airplane mode is on. | |||||||||
| String | ALARM_ALERT | Persistent store for the system-wide default alarm alert. | |||||||||
| String | ALWAYS_FINISH_ACTIVITIES | If 1, the activity manager will aggressively finish activities and processes as soon as they are no longer needed. | |||||||||
| String | ANDROID_ID | This constant is deprecated. Use ANDROID_ID instead |
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| String | APPEND_FOR_LAST_AUDIBLE | Appended to various volume related settings to record the previous values before they the settings were affected by a silent/vibrate ringer mode change. | |||||||||
| String | AUTO_TIME | Value to specify if the user prefers the date, time and time zone to be automatically fetched from the network (NITZ). | |||||||||
| String | AUTO_TIME_ZONE | Value to specify if the user prefers the time zone to be automatically fetched from the network (NITZ). | |||||||||
| String | BLUETOOTH_DISCOVERABILITY | Determines whether remote devices may discover and/or connect to this device. | |||||||||
| String | BLUETOOTH_DISCOVERABILITY_TIMEOUT | Bluetooth discoverability timeout. | |||||||||
| String | BLUETOOTH_ON | This constant is deprecated. Use BLUETOOTH_ON instead |
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| String | DATA_ROAMING | This constant is deprecated. Use DATA_ROAMING instead |
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| String | DATE_FORMAT | Date format string mm/dd/yyyy dd/mm/yyyy yyyy/mm/dd | |||||||||
| String | DEBUG_APP | Name of an application package to be debugged. | |||||||||
| String | DEVICE_PROVISIONED | This constant is deprecated. Use DEVICE_PROVISIONED instead |
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| String | DIM_SCREEN | Whether or not to dim the screen. | |||||||||
| String | DTMF_TONE_WHEN_DIALING | Whether the audible DTMF tones are played by the dialer when dialing. | |||||||||
| String | END_BUTTON_BEHAVIOR | What happens when the user presses the end call button if they're not on a call. | |||||||||
| String | FONT_SCALE | Scaling factor for fonts, float. | |||||||||
| String | HAPTIC_FEEDBACK_ENABLED | Whether the haptic feedback (long presses, ...) are enabled. | |||||||||
| String | HTTP_PROXY | This constant is deprecated. Use HTTP_PROXY instead |
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| String | INSTALL_NON_MARKET_APPS | This constant is deprecated. Use INSTALL_NON_MARKET_APPS instead |
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| String | LOCATION_PROVIDERS_ALLOWED | This constant is deprecated. Use LOCATION_PROVIDERS_ALLOWED instead |
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| String | LOCK_PATTERN_ENABLED | This constant is deprecated. Use LOCK_PATTERN_ENABLED instead |
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| String | LOCK_PATTERN_TACTILE_FEEDBACK_ENABLED | This constant is deprecated. Use LOCK_PATTERN_TACTILE_FEEDBACK_ENABLED instead |
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| String | LOCK_PATTERN_VISIBLE | This constant is deprecated. Use LOCK_PATTERN_VISIBLE instead |
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| String | LOGGING_ID | This constant is deprecated. Use LOGGING_ID instead |
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| String | MODE_RINGER | Ringer mode. | |||||||||
| String | MODE_RINGER_STREAMS_AFFECTED | Determines which streams are affected by ringer mode changes. | |||||||||
| String | MUTE_STREAMS_AFFECTED | Determines which streams are affected by mute. | |||||||||
| String | NETWORK_PREFERENCE | This constant is deprecated. Use NETWORK_PREFERENCE instead |
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| String | NEXT_ALARM_FORMATTED | A formatted string of the next alarm that is set, or the empty string if there is no alarm set. | |||||||||
| String | NOTIFICATION_SOUND | Persistent store for the system-wide default notification sound. | |||||||||
| String | PARENTAL_CONTROL_ENABLED | This constant is deprecated. Use PARENTAL_CONTROL_ENABLED instead |
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| String | PARENTAL_CONTROL_LAST_UPDATE | This constant is deprecated. Use PARENTAL_CONTROL_LAST_UPDATE instead |
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| String | PARENTAL_CONTROL_REDIRECT_URL | This constant is deprecated. Use PARENTAL_CONTROL_REDIRECT_URL instead |
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| String | RADIO_BLUETOOTH | Constant for use in AIRPLANE_MODE_RADIOS to specify Bluetooth radio. | |||||||||
| String | RADIO_CELL | Constant for use in AIRPLANE_MODE_RADIOS to specify Cellular radio. | |||||||||
| String | RADIO_WIFI | Constant for use in AIRPLANE_MODE_RADIOS to specify Wi-Fi radio. | |||||||||
| String | RINGTONE | Persistent store for the system-wide default ringtone URI. | |||||||||
| String | SCREEN_BRIGHTNESS | The screen backlight brightness between 0 and 255. | |||||||||
| String | SCREEN_BRIGHTNESS_MODE | Control whether to enable automatic brightness mode. | |||||||||
| int | SCREEN_BRIGHTNESS_MODE_AUTOMATIC | SCREEN_BRIGHTNESS_MODE value for manual mode. | |||||||||
| int | SCREEN_BRIGHTNESS_MODE_MANUAL | SCREEN_BRIGHTNESS_MODE value for manual mode. | |||||||||
| String | SCREEN_OFF_TIMEOUT | The timeout before the screen turns off. | |||||||||
| String | SETTINGS_CLASSNAME | This constant is deprecated. Use SETTINGS_CLASSNAME instead |
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| String | SETUP_WIZARD_HAS_RUN | Whether the setup wizard has been run before (on first boot), or if it still needs to be run. | |||||||||
| String | SHOW_GTALK_SERVICE_STATUS | ||||||||||
| String | SHOW_PROCESSES | Control whether the process CPU usage meter should be shown. | |||||||||
| String | SHOW_WEB_SUGGESTIONS | This constant is deprecated. Each application that shows web suggestions should have its own setting for this. | |||||||||
| String | SOUND_EFFECTS_ENABLED | Whether the sounds effects (key clicks, lid open ...) are enabled. | |||||||||
| String | STAY_ON_WHILE_PLUGGED_IN | Whether we keep the device on while the device is plugged in. | |||||||||
| String | SYS_PROP_SETTING_VERSION | ||||||||||
| String | TEXT_AUTO_CAPS | Setting to enable Auto Caps in text editors. | |||||||||
| String | TEXT_AUTO_PUNCTUATE | Setting to enable Auto Punctuate in text editors. | |||||||||
| String | TEXT_AUTO_REPLACE | Setting to enable Auto Replace (AutoText) in text editors. | |||||||||
| String | TEXT_SHOW_PASSWORD | Setting to showing password characters in text editors. | |||||||||
| String | TIME_12_24 | Display times as 12 or 24 hours 12 24 | |||||||||
| String | TRANSITION_ANIMATION_SCALE | Scaling factor for activity transition animations. | |||||||||
| String | USB_MASS_STORAGE_ENABLED | This constant is deprecated. Use USB_MASS_STORAGE_ENABLED instead |
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| String | USER_ROTATION | Default screen rotation when no other policy applies. | |||||||||
| String | USE_GOOGLE_MAIL | This constant is deprecated. Use USE_GOOGLE_MAIL instead |
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| String | VIBRATE_ON | Whether vibrate is on for different events. | |||||||||
| String | VOLUME_ALARM | Alarm volume. | |||||||||
| String | VOLUME_BLUETOOTH_SCO | Bluetooth Headset volume. | |||||||||
| String | VOLUME_MUSIC | Music/media/gaming volume. | |||||||||
| String | VOLUME_NOTIFICATION | Notification volume. | |||||||||
| String | VOLUME_RING | Ringer volume. | |||||||||
| String | VOLUME_SYSTEM | System/notifications volume. | |||||||||
| String | VOLUME_VOICE | Voice call volume. | |||||||||
| String | WAIT_FOR_DEBUGGER | If 1, when launching DEBUG_APP it will wait for the debugger before starting user code. | |||||||||
| String | WALLPAPER_ACTIVITY | Name of activity to use for wallpaper on the home screen. | |||||||||
| String | WIFI_MAX_DHCP_RETRY_COUNT | This constant is deprecated. Use WIFI_MAX_DHCP_RETRY_COUNT instead |
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| String | WIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS | This constant is deprecated. UseWIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS instead |
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| String | WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON | This constant is deprecated. Use WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON instead |
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| String | WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY | This constant is deprecated. Use WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY instead |
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| String | WIFI_NUM_OPEN_NETWORKS_KEPT | This constant is deprecated. Use WIFI_NUM_OPEN_NETWORKS_KEPT instead |
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| String | WIFI_ON | This constant is deprecated. Use WIFI_ON instead |
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| String | WIFI_SLEEP_POLICY | The policy for deciding when Wi-Fi should go to sleep (which will in turn switch to using the mobile data as an Internet connection). | |||||||||
| int | WIFI_SLEEP_POLICY_DEFAULT | Value for WIFI_SLEEP_POLICY to use the default Wi-Fi sleep policy, which is to sleep shortly after the turning off according to the STAY_ON_WHILE_PLUGGED_IN setting. |
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| int | WIFI_SLEEP_POLICY_NEVER | Value for WIFI_SLEEP_POLICY to never go to sleep. |
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| int | WIFI_SLEEP_POLICY_NEVER_WHILE_PLUGGED | Value for WIFI_SLEEP_POLICY to use the default policy when the device is on battery, and never go to sleep when the device is plugged in. |
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| String | WIFI_STATIC_DNS1 | If using static IP, the primary DNS's IP address. | |||||||||
| String | WIFI_STATIC_DNS2 | If using static IP, the secondary DNS's IP address. | |||||||||
| String | WIFI_STATIC_GATEWAY | If using static IP, the gateway's IP address. | |||||||||
| String | WIFI_STATIC_IP | The static IP address. | |||||||||
| String | WIFI_STATIC_NETMASK | If using static IP, the net mask. | |||||||||
| String | WIFI_USE_STATIC_IP | Whether to use static IP and other static network attributes. | |||||||||
| String | WIFI_WATCHDOG_ACCEPTABLE_PACKET_LOSS_PERCENTAGE | This constant is deprecated. UseWIFI_WATCHDOG_ACCEPTABLE_PACKET_LOSS_PERCENTAGE instead |
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| String | WIFI_WATCHDOG_AP_COUNT | This constant is deprecated. Use WIFI_WATCHDOG_AP_COUNT instead |
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| String | WIFI_WATCHDOG_BACKGROUND_CHECK_DELAY_MS | This constant is deprecated. Use WIFI_WATCHDOG_BACKGROUND_CHECK_DELAY_MS instead |
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| String | WIFI_WATCHDOG_BACKGROUND_CHECK_ENABLED | This constant is deprecated. Use WIFI_WATCHDOG_BACKGROUND_CHECK_ENABLED instead |
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| String | WIFI_WATCHDOG_BACKGROUND_CHECK_TIMEOUT_MS | This constant is deprecated. Use WIFI_WATCHDOG_BACKGROUND_CHECK_TIMEOUT_MSinstead |
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| String | WIFI_WATCHDOG_INITIAL_IGNORED_PING_COUNT | This constant is deprecated. Use WIFI_WATCHDOG_INITIAL_IGNORED_PING_COUNTinstead |
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| String | WIFI_WATCHDOG_MAX_AP_CHECKS | This constant is deprecated. Use WIFI_WATCHDOG_MAX_AP_CHECKS instead |
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| String | WIFI_WATCHDOG_ON | This constant is deprecated. Use WIFI_WATCHDOG_ON instead |
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| String | WIFI_WATCHDOG_PING_COUNT | This constant is deprecated. Use WIFI_WATCHDOG_PING_COUNT instead |
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| String | WIFI_WATCHDOG_PING_DELAY_MS | This constant is deprecated. Use WIFI_WATCHDOG_PING_DELAY_MS instead |
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| String | WIFI_WATCHDOG_PING_TIMEOUT_MS | This constant is deprecated. Use WIFI_WATCHDOG_PING_TIMEOUT_MS instead |
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| String | WINDOW_ANIMATION_SCALE | Scaling factor for normal window animations. | |||||||||