在進行Android系統開發的時候，有些特定的情況需要設置系統永不鎖屏，永不休眠。本篇文章給大家介紹Android 永不鎖屏，開機不鎖屏，刪除設置中休眠時間選項，需要的朋友一起學習吧。
Android 6.0.1
Create:2016-02-29
1.Settings 刪掉屏幕待機選項
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" /> -->
注釋掉這個ListPreference
packages/apps/Settings/src/com/android/settings/DisplaySettings.java
添加if條件，如果沒有找到這個preference就不執行相關操作；具體可以參考被隱藏的 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.禁止鎖屏
frameworks/base/packages/SettingsProvider/res/values/defaults.xml<bool name="def_lockscreen_disabled">false</bool> 改為 true；即默認禁止鎖屏frameworks/base/core/res/res/values/config.xml<integer name="config_multiuserMaximumUsers">1</integer> 不允許多用戶；即最大用戶數為1
分別編譯frameworks/base/packages/SettingsProvider 與 frameworks/base
編譯后push 到 system/priv-app/SettingsProvider/SettingsProvider.apk system/framework/framework.jar
刪去機器中對應的oat目錄。重啟或恢復出廠設置。第一次開機時，會先出現status bar，launcher要等一會才出來。
之后重啟就可以直接進入launcher。機器會默認不鎖屏。但還是會進入sleep狀態。
源碼流程：
frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.javaif (upgradeVersion == 54)// 版本為54才會設置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，則永不鎖屏
讀取"ro.lockscreen.disable.default"，如果默認為true，則設置禁止鎖屏；否則從xml中讀配置
frameworks/base/packages/SettingsProvider/res/values/defaults.xml<integer name="def_screen_off_timeout">60000</integer><bool name="def_lockscreen_disabled">false</bool>`
禁止鎖屏默認為false
以上內容是小編給大家介紹的設置Android系統永不鎖屏永不休眠的方法，希望對大家有所幫助。
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