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。