在编译Android时，开机不锁屏

不锁屏修改： 1，packages/apps/Settings/src/com/android/settings/DisplaySettings.java ：        ListPreference screenTimeoutPreference =            (ListPreference) findPreference(KEY_SCREEN_TIMEOUT);

//for android 2.3

        //screenTimeoutPreference.setValue(String.valueOf(Settings.System.getInt(              

 // resolver, SCREEN_OFF_TIMEOUT, FALLBACK_SCREEN_TIMEOUT_VALUE)));

//end for android 2.3

 

//for android 4.0 

                      //screenTimeoutPreference.setValue(String.valueOf(userPreference));

//end for android 4.0

screenTimeoutPreference.setValue("-1");

2 ，frameworks/base/policy/src/com/android/internal/policy/impl/KeyguardViewMediator.java：private boolean mExternallyEnabled = false;

3,frameworks/base/packages/SettingsProvider/res/values/defaults.xml

<integer name="def_screen_off_timeout">-1</integer>

<integer name="def_screen_off_timeout">60000</integer>

60000单位是毫秒，修改为大点的值就可以延长开机时间，但 -1好像不是无限大。

在packages/apps/Settings/res/values/arrays.xml中

<string-array name="screen_timeout_entries">

<item>30 minutes</item> 下面添加如下

<item>12 hours</item>

在

<string-array name="screen_timeout_values" translatable="false">

<item>1800000</item> 下面添加如下：

<item>36000000</item>