android

settings数据库

2018-01-08  本文已影响24人  44e46f384a16

转载自http://blog.csdn.net/hfreeman2008/article/details/21603577

在设置(settings)应用中，我们可以把一些值(int,boolean,string)保存在db数据库。这个值，我们可以在不同的app应用中使用。我们可以非常方便的在此上添加一些简单的代码，实现一个新的变量在db数据库中，方便不同的app来共同使用。

<a name="t0" style="box-sizing: border-box; background: transparent; color: rgb(79, 161, 219); text-decoration: none; margin: 0px; padding: 0px; font-weight: 400; outline: 0px;"></a>1.关键类和文件

frameworks\base\packages\settingsprovider\src\com\android\providers\settings*databaseHelper.java*-------给变量赋值，我们可以把变量的初始值写到下面的defaults.xml文件中，使用后面的修改和统一管理。

frameworks\base\packages\settingsprovider\res\values*defaults.xml*----------放置变量的初始值
有四种类型(bool, integer, string, fraction)四种类型
<bool name="def_sound_effects_enabled">true</bool>
<integer name="def_max_dhcp_retries">9</integer>
<string name="def_location_providers_allowed" translatable="false">gps</string>
<fraction name="def_window_animation_scale">100%</fraction>

frameworks\base\core\java\android\provider*settings.java*----------定义变量

<a name="t1" style="box-sizing: border-box; background: transparent; color: rgb(79, 161, 219); text-decoration: none; margin: 0px; padding: 0px; font-weight: 400; outline: 0px;"></a>2.我们以SET_INSTALL_LOCATION为例，让我们知道这个变量是如何定义使用的：

(1) frameworks\base\core\java\android\provider\settings.java---定义变量：

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  1. /**

    • Let user pick default install location.
    • @hide

  5. */

  6. public static final String SET_INSTALL_LOCATION = "set_install_location";

  7. MOVED_TO_GLOBAL.add(Settings.Global.SET_INSTALL_LOCATION);

(2) frameworks\base\packages\settingsprovider\src\com\android\providers\settings\ databaseHelper.java------给变量赋值
在loadGlobalSettings(SQLiteDatabase db)方法中：

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  1. loadSetting(stmt, Settings.Global.SET_INSTALL_LOCATION, 0);

(3)如何使用：

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  1. import android.provider.Settings;

  2. boolean userSetInstLocation = (Settings.Global.getInt(getContentResolver(),

  3. Settings.Global.SET_INSTALL_LOCATION, 0) != 0);

<a name="t2" style="box-sizing: border-box; background: transparent; color: rgb(79, 161, 219); text-decoration: none; margin: 0px; padding: 0px; font-weight: 400; outline: 0px;"></a>3.我们再以CAR_DOCK_SOUND为例，让我们看看这个变量是如何定义使用的：

(1) frameworks\base\core\java\android\provider\settings.java---定义变量：

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  1. public static final String CAR_DOCK_SOUND = "car_dock_sound";
  2. MOVED_TO_GLOBAL.add(Settings.Global.CAR_DOCK_SOUND);

(2) frameworks\base\packages\settingsprovider\src\com\android\providers\settings\ databaseHelper.java------给变量赋值

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  1. loadStringSetting(stmt, Settings.Global.CAR_DOCK_SOUND,R.string.def_car_dock_sound);

(3) frameworks\base\packages\settingsprovider\res\values\defaults.xml-----定义初始值

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  1. <string name="def_car_dock_sound" translatable="false">/system/media/audio/ui/Dock.ogg</string>

(4)如何使用：

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  1. import android.provider.Settings;

  2. String whichSound = null;

  3. whichSound = Settings.Global.CAR_DOCK_SOUND;

  4. ContentResolver cr = mContext.getContentResolver();

  5. final String soundPath = Settings.Global.getString(cr, whichSound);

<a name="t3" style="box-sizing: border-box; background: transparent; color: rgb(79, 161, 219); text-decoration: none; margin: 0px; padding: 0px; font-weight: 400; outline: 0px;"></a>4.在DB数据库中添加一个标志位(HY_VIP_FUNCTION)的样例：

(1)在任意APP中使用样例：

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  1. int vipFunction = Settings.System.getInt(getContentResolver(), Settings.System.HY_VIP_FUNCTION, -1);

(2)修改的文件：

frameworks\base\packages\settingsprovider\src\com\android\providers\settings\DatabaseHelper.java

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  1. private void loadSystemSettings(SQLiteDatabase db) {

  2. SQLiteStatement stmt = null;

  3. try {

  4. stmt = db.compileStatement("INSERT OR IGNORE INTO system(name,value)"

    • " VALUES(?,?);");

  6. loadBooleanSetting(stmt, Settings.System.DIM_SCREEN,

  7. R.bool.def_dim_screen);

  8. loadIntegerSetting(stmt, Settings.System.SCREEN_OFF_TIMEOUT,

  9. R.integer.def_screen_off_timeout);

  10. // Set default cdma DTMF type

  11. loadSetting(stmt, Settings.System.DTMF_TONE_TYPE_WHEN_DIALING, 0);

  12. // Set default hearing aid

  13. loadSetting(stmt, Settings.System.HEARING_AID, 0);

  14. // Set default tty mode

  15. loadSetting(stmt, Settings.System.TTY_MODE, 0);

  16. loadIntegerSetting(stmt, Settings.System.SCREEN_BRIGHTNESS,

  17. R.integer.def_screen_brightness);

  18. loadBooleanSetting(stmt, Settings.System.SCREEN_BRIGHTNESS_MODE,

  19. R.bool.def_screen_brightness_automatic_mode);

  20. loadDefaultAnimationSettings(stmt);

  21. loadBooleanSetting(stmt, Settings.System.ACCELEROMETER_ROTATION,

  22. R.bool.def_accelerometer_rotation);

  23. loadDefaultHapticSettings(stmt);

  24. loadBooleanSetting(stmt, Settings.System.NOTIFICATION_LIGHT_PULSE,

  25. R.bool.def_notification_pulse);

  26. loadUISoundEffectsSettings(stmt);

  27. loadIntegerSetting(stmt, Settings.System.POINTER_SPEED,

  28. R.integer.def_pointer_speed);

  29. /** Add by HY [wangxianming] add VIP Function in 2014-02-21 by start @{ */

  30. loadBooleanSetting(stmt, Settings.System.HY_VIP_FUNCTION,

  31. R.bool.hy_def_vip_function_value);

  32. /** Add by HY [wangxianming] add VIP Function in 2014-02-21 by end @} */

frameworks\base\core\java\android\provider\Settings.java

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  1. /**

    • Name of activity to use for wallpaper on the home screen.
    • @deprecated Use {@link WallpaperManager} instead.

  5. */

  6. @Deprecated

  7. public static final String WALLPAPER_ACTIVITY = "wallpaper_activity";

  8. /**

    • @deprecated Use {@link android.provider.Settings.Global#AUTO_TIME}
    • instead

  11. */

  12. @Deprecated

  13. public static final String AUTO_TIME = Global.AUTO_TIME;

  14. /**

    • @deprecated Use {@link android.provider.Settings.Global#AUTO_TIME_ZONE}
    • instead

  17. */

  18. @Deprecated

  19. public static final String AUTO_TIME_ZONE = Global.AUTO_TIME_ZONE;

  20. /**

    • Display times as 12 or 24 hours
    • 12
    • 24

  24. */

  25. public static final String TIME_12_24 = "time_12_24";

  26. /**

    • Add by HY [wangxianming] add VIP Function in 2014-02-21 by start @{
    • Values 1: is open this function 0: is close this function
    • @hide

  32. */

  33. public static final String HY_VIP_FUNCTION = "hy_vip_function";

  34. /** Add by HY [wangxianming] add VIP Function in 2014-02-21 by end @} */

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  1. /**

    • Settings to backup. This is here so that it's in the same place as the settings
    • keys and easy to update.
    • NOTE: Settings are backed up and restored in the order they appear
    •   in this array. If you have one setting depending on another, 

    •   make sure that they are ordered appropriately.
    • @hide

  10. */

  11. public static final String[] SETTINGS_TO_BACKUP = {

  12. STAY_ON_WHILE_PLUGGED_IN, // moved to global

  13. WIFI_USE_STATIC_IP,

  14. WIFI_STATIC_IP,

  15. WIFI_STATIC_GATEWAY,

  16. WIFI_STATIC_NETMASK,

  17. WIFI_STATIC_DNS1,

  18. WIFI_STATIC_DNS2,

  19. BLUETOOTH_DISCOVERABILITY,

  20. BLUETOOTH_DISCOVERABILITY_TIMEOUT,

  21. DIM_SCREEN,

  22. SCREEN_OFF_TIMEOUT,

  23. SCREEN_BRIGHTNESS,

  24. SCREEN_BRIGHTNESS_MODE,

  25. SCREEN_AUTO_BRIGHTNESS_ADJ,

  26. VIBRATE_INPUT_DEVICES,

  27. MODE_RINGER, // moved to global

  28. MODE_RINGER_STREAMS_AFFECTED,

  29. MUTE_STREAMS_AFFECTED,

  30. VOLUME_VOICE,

  31. VOLUME_SYSTEM,

  32. VOLUME_RING,

  33. VOLUME_MUSIC,

  34. VOLUME_ALARM,

  35. VOLUME_NOTIFICATION,

  36. VOLUME_BLUETOOTH_SCO,

  37. VOLUME_VOICE + APPEND_FOR_LAST_AUDIBLE,

  38. VOLUME_SYSTEM + APPEND_FOR_LAST_AUDIBLE,

  39. VOLUME_RING + APPEND_FOR_LAST_AUDIBLE,

  40. VOLUME_MUSIC + APPEND_FOR_LAST_AUDIBLE,

  41. VOLUME_ALARM + APPEND_FOR_LAST_AUDIBLE,

  42. VOLUME_NOTIFICATION + APPEND_FOR_LAST_AUDIBLE,

  43. VOLUME_BLUETOOTH_SCO + APPEND_FOR_LAST_AUDIBLE,

  44. TEXT_AUTO_REPLACE,

  45. TEXT_AUTO_CAPS,

  46. TEXT_AUTO_PUNCTUATE,

  47. TEXT_SHOW_PASSWORD,

  48. AUTO_TIME, // moved to global

  49. AUTO_TIME_ZONE, // moved to global

  50. TIME_12_24,

  51. /** Add by HY [wangxianming] add VIP Function in 2014-02-21 by start @{ */

  52. HY_VIP_FUNCTION,

  53. /** Add by HY [wangxianming] add VIP Function in 2014-02-21 by end @} */

  54. DATE_FORMAT,

  55. HY_WALLPAPER_MODE,

  56. DTMF_TONE_WHEN_DIALING,

  57. DTMF_TONE_TYPE_WHEN_DIALING,

  58. HEARING_AID,

  59. TTY_MODE,

  60. SOUND_EFFECTS_ENABLED,

  61. HAPTIC_FEEDBACK_ENABLED,

  62. POWER_SOUNDS_ENABLED, // moved to global

  63. DOCK_SOUNDS_ENABLED, // moved to global

  64. LOCKSCREEN_SOUNDS_ENABLED,

  65. SHOW_WEB_SUGGESTIONS,

  66. NOTIFICATION_LIGHT_PULSE,

  67. SIP_CALL_OPTIONS,

  68. SIP_RECEIVE_CALLS,

  69. POINTER_SPEED,

  70. VIBRATE_WHEN_RINGING

  71. };

frameworks\base\packages\settingsprovider\res\values\Defaults.xml------http://------------设置初始值

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  2. <bool name="def_stay_on_while_plugged_in">false</bool>

  4. <integer name="def_max_dhcp_retries">9</integer>

  6. <bool name="def_user_setup_complete">true</bool>

  7. <integer name="hy_def_wallpaper_mode_value">-1</integer>

  9. <bool name="hy_def_vip_function_value">false</bool>

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