本文介绍如何修改系统锁屏应用，从而实现在OpenHarmony 4.1R上设置系统默认不锁屏。
环境配置
1.DevEco Studio 4.1 Release，下载链接地址
- API10 Full SDK,安装教程
步骤
1.首先下载4.1r分支的系统锁屏应用applications_screenlock
2.修改系统锁屏应用代码，applications_screenlock-OpenHarmony-v4.1-Release\features\screenlock\src\main\ets\com\ohos\model\screenLockService.ts文件中
将monitorEvents方法修改为
monitorEvents() {Log.showDebug(TAG, 'registered events start');this.screenLockModel.eventListener((typeName: String) => {switch (typeName) {// System ready on device bootcase EVENT_SYSTEM_READY:Log.showInfo(TAG, `EVENT_SYSTEM_READY event`);this.lockScreen();break;//Bright screencase EVENT_END_SCREEN_ON:Log.showInfo(TAG, `EVENT_END_SCREEN_ON event`);this.authUserByFace()AppStorage.SetOrCreate('deviceStatus', EVENT_END_SCREEN_ON);break;//The device is going to sleepcase EVENT_BEGIN_SLEEP:Trace.start(Trace.CORE_METHOD_SLEEP_TO_LOCK_SCREEN);Log.showInfo(TAG, `EVENT_BEGIN_SLEEP event`);this.unlockScreen();//修改this.accountModel.updateAllUsers()AppStorage.SetOrCreate('deviceStatus', EVENT_END_SCREEN_ON);//修改break;//unlock request was receivedcase EVENT_UNLOCK_SCREEN:Log.showInfo(TAG, `EVENT_UNLOCK_SCREEN event`);this.unlockScreen();break;//lock request was receivedcase EVENT_LOCK_SCREEN:Log.showInfo(TAG, `EVENT_LOCK_SCREEN event`);this.unlockScreen();//修改break;case SERVICE_RESTART:setTimeout(() => {this.monitorEvents();this.unlockScreen();//修改}, 2000);break;default:Log.showError(TAG, `eventListener:typeName ${typeName}`)}})
将lockScreen方法修改为
lockScreen() {Trace.start(Trace.CORE_METHOD_SHOW_LOCK_SCREEN);Log.showDebug(TAG, `lockScreen`);let length = parseInt(Router.getLength())Log.showDebug(TAG, `Router.getLength: ${length}`)for (let index = 1; index < length; index++) {Log.showInfo(TAG, `back to index`);Router.back();}//lock the screenthis.screenLockModel.showScreenLockWindow(() => {Log.showInfo(TAG, `showScreenLockWindow finish`);this.checkPinAuthProperty(() => {});Log.showInfo(TAG, `screenlock status:${this.currentLockStatus}, userId : ${this.accountModel.getCurrentUserId()}`);if (this.currentLockStatus == ScreenLockStatus.Locking) {Log.showInfo(TAG, `had locked, no need to publish lock_screen`);} else {this.notifyLockScreenResult(LockResult.Success)systemParameter.set('bootevent.lockscreen.ready','true')this.currentLockStatus = ScreenLockStatus.Locking;this.unlocking();//修改}});}
3.使用DevEco Studio 4.1 Release和 API10 Full SDK对系统应用进行签名，默认工程是未配置签名的状态，所构建的包均为 unsigned 标记的HAP包，无法安装到 OpenHarmony 系统中。
打开developtools_hapsigner仓库，进入 dist 目录，点击下载OpenHarmony.p12和OpenHarmonyApplication.pem（pem文件若无法直接下载，可直接在目录中创建文件然后将内容拷贝到文件中）。
把下载好的文件放入工程目录的 signature 中。
签名文件配置:
DevEco Studio 4.0 Release 版本界面化配置签名时，秘钥不允许配置8位以下纯数字秘钥，而标准签名文件的秘钥为123456 ，所以无法通过DevEco Studio 界面进行签名的配置。仅能使用手动配置build-profile.json5 文件方式，进行签名信息的配置。下载material包解压后放入signature 目录中，material 文件夹中存放的为加密盐文件，此包将给予签名工具验证秘钥时使用。
- 配置工程根路径build-profile.json5 文件，拷贝以下签名信息到配置文件中，其中storePassword 和keyPassword 为material 包与秘钥加密生成的数据，keyAlias 为固定值"OpenHarmony Application Release"。
"signingConfigs": [{"name": "release","material": {"storePassword": "00000016D9DCF063F0FC4BBD0E7FE1E3B06A67C07BECE1BDD4E2A3EFDAE20F890810EC02AA2A","certpath": "signature/OpenHarmonyApplication.pem","keyAlias": "OpenHarmony Application Release","keyPassword": "00000016FD3897FD4C46940ED39FFC652872B7B18BEDCCA07400A6EBEE307C9C41B96DB6B64D","profile": "signature/systemui.p7b","signAlg": "SHA256withECDSA","storeFile": "signature/OpenHarmony.p12"} }],
- 构建安装验证
单击 Build >Build Hap(s)/APP(s) > Build APP(s) 构建 SystemUI 工程HAP包。
4.安装编译好的锁屏应用
编译好的应用在product\phone\build\default\outputs\default\phone-entry-default-signed.hap
将应用包推送到开发板
hdc file send "\你的路径\applications_screenlock-OpenHarmony-v4.1-Release\product\phone\build\default\outputs\default\phone-entry-default-signed.hap" /data安装hap
hdc shell bm install -p /data/phone-entry-default-signed.hap -u 0
实现效果
实现效果.mp4
修改好的不锁屏的系统锁屏应用
编译好的不锁屏的hap包
设置屏幕不息屏
hdc shell power-shell setmode 602
参考链接：https://laval.csdn.net/657aaa786901917cd68b1f45.html
