在进行android系统开发的时候，有些特定的情况需要设置系统永不锁屏，永不休眠。本篇文章给大家介绍android 永不锁屏，开机不锁屏，删除设置中休眠时间选项，需要的朋友一起学习吧。
android 6.0.1
create:2016-02-29
1.settings 删掉屏幕待机选项
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packages/apps/settings/res/xml/display_settings.xml<!-- hide screen sleep<listpreferenceandroid:key="screen_timeout"android:title="@string/screen_timeout"android:summary="@string/screen_timeout_summary"android:persistent="false"android:entries="@array/screen_timeout_entries"android:entryvalues="@array/screen_timeout_values" /> --> |
注释掉这个listpreference
packages/apps/settings/src/com/android/settings/displaysettings.java
添加if条件，如果没有找到这个preference就不执行相关操作；具体可以参考被隐藏的 night_mode
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mscreentimeoutpreference = (listpreference) findpreference(key_screen_timeout);if (mscreentimeoutpreference !=null ) {final long currenttimeout = settings.system.getlong(resolver, screen_off_timeout,fallback_screen_timeout_value);mscreentimeoutpreference.setvalue(string.valueof(currenttimeout));mscreentimeoutpreference.setonpreferencechangelistener(this);disableunusabletimeouts(mscreentimeoutpreference);updatetimeoutpreferencedescription(currenttimeout);} |
2.禁止锁屏
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frameworks/base/packages/settingsprovider/res/values/defaults.xml<bool name="def_lockscreen_disabled">false</bool> 改为 true；即默认禁止锁屏frameworks/base/core/res/res/values/config.xml<integer name="config_multiusermaximumusers">1</integer> 不允许多用户；即最大用户数为1 |
分别编译frameworks/base/packages/settingsprovider 与 frameworks/base
编译后push 到 system/priv-app/settingsprovider/settingsprovider.apk system/framework/framework.jar
删去机器中对应的oat目录。重启或恢复出厂设置。第一次开机时，会先出现status bar，launcher要等一会才出来。
之后重启就可以直接进入launcher。机器会默认不锁屏。但还是会进入sleep状态。
源码流程：
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frameworks/base/packages/settingsprovider/src/com/android/providers/settings/databasehelper.javaif (upgradeversion == 54)// 版本为54才会设置timeout......private void upgradescreentimeoutfromnever(sqlitedatabase db) {// see if the timeout is -1 (for "never").cursor c = db.query(table_system, new string[] { "_id", "value" }, "name=? and value=?",new string[] { settings.system.screen_off_timeout, "-1" },null, null, null);sqlitestatement stmt = null;if (c.getcount() > 0) {c.close();try {stmt = db.compilestatement("insert or replace into system(name,value)"+ " values(?,?);");// set the timeout to 30 minutes in millisecondsloadsetting(stmt, settings.system.screen_off_timeout,integer.tostring(30 * 60 * 1000));} finally {if (stmt != null) stmt.close();}} else {c.close();}}......if (systemproperties.getboolean("ro.lockscreen.disable.default", false) == true) {loadsetting(stmt, settings.system.lockscreen_disabled, "1");} else {loadbooleansetting(stmt, settings.system.lockscreen_disabled,r.bool.def_lockscreen_disabled);} |
timeout若是-1，则永不锁屏
读取"ro.lockscreen.disable.default"，如果默认为true，则设置禁止锁屏；否则从xml中读配置
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frameworks/base/packages/settingsprovider/res/values/defaults.xml<integer name="def_screen_off_timeout">60000</integer><bool name="def_lockscreen_disabled">false</bool>` |
禁止锁屏默认为false
以上内容是小编给大家介绍的设置android系统永不锁屏永不休眠的方法，希望对大家有所帮助。
