设置Android系统永不锁屏永不休眠的方法

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

packages/apps/settings/res/xml/display_settings.xml
<!-- hide screen sleep
<listpreference
android: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

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

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：

frameworks/base/packages/settingsprovider/src/com/android/providers/settings/databasehelper.java
if (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 milliseconds
loadsetting(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

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。