Android修改源代码控制永不锁屏.docx

Android修改源代码控制永不锁屏一种方法：(去掉屏幕锁其实很简单,哪有那么多要改的地方myandroid/frameworks/base/policy/src/com/android/internal/policy/impl/KeyguardViewMediator.java大概在840多行的位置,有一个handleShow();注释掉就OK了)方法二：锁定屏幕对于移动终端来说是非常有必要的，但是对于机顶盒产品就没有这个必要了。所以本文介绍一下怎样让Android设备永不锁屏。Android系统的锁屏时间存放在Setting数据库中，字段为Settings.System.SCREEN_OFF_TIMEOUT。查看SettingsProvider源码，查看如下文件的源码：frameworks/base/packages/SettingsProvider/src/com/Android/providers/settings/DatabaseHelper.java查看loadSystemSettings()函数的代码如下：private void loadSystemSettings(SQLiteDatabase db) {??????? SQLiteStatement stmt = pileStatement(INSERT OR IGNORE INTO system(name,value)??????????????? + VALUES(?,?););??????? Resources r = mContext.getResources();??????? loadBooleanSetting(stmt, Settings.System.DIM_SCREEN,??????????????? R.bool.def_dim_screen);??????? loadSetting(stmt, Settings.System.STAY_ON_WHILE_PLUGGED_IN,??????????????? 1.equals(SystemProperties.get(ro.kernel.qemu)) ? 1 : 0);??????? loadIntegerSetting(stmt, Settings.System.SCREEN_OFF_TIMEOUT,??????????????? R.integer.def_screen_off_timeout);??????? // Set default cdma emergency tone??????? loadSetting(stmt, Settings.System.EMERGENCY_TONE, 0);??????? // Set default cdma call auto retry??????? loadSetting(stmt, Settings.System.CALL_AUTO_RETRY, 0);??????? // Set default cdma DTMF type??????? loadSetting(stmt, Settings.System.DTMF_TONE_TYPE_WHEN_DIALING, 0);??????? // Set default hearing aid??????? loadSetting(stmt, Settings.System.HEARING_AID, 0);??????? // Set default tty mode??????? loadSetting(stmt, Settings.System.TTY_MODE, 0);??????? loadBooleanSetting(stmt, Settings.System.AIRPLANE_MODE_ON,??????????????? R.bool.def_airplane_mode_on);??????? loadStringSetting(stmt, Settings.System.AIRPLANE_MODE_RADIOS,??????????????? R.string.def_airplane_mode_radios);??????? loadStringSetting(stmt, Settings.System.AIRPLANE_MODE_TOGGLEABLE_RADIOS,??????????????? R.string.airplane_mode_toggleable_radios);??????? loadBooleanSetting(stmt, Settings.System.AUTO_TIME,??????????????? R.bool.def_auto_time