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

2. 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 boot
                case EVENT_SYSTEM_READY:
                    Log.showInfo(TAG, `EVENT_SYSTEM_READY event`);
                    this.lockScreen();
                    break;
            //Bright screen
                case 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 sleep
                case 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 received
                case EVENT_UNLOCK_SCREEN:
                    Log.showInfo(TAG, `EVENT_UNLOCK_SCREEN event`);
                    this.unlockScreen();
                    break;
            //lock request was received
                case 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: ${length}`)
        for (let index = 1; index < length; index++) {
            Log.showInfo(TAG, `back to index`);
            Router.back();
        }
        //lock the screen
        this.screenLockModel.showScreenLockWindow(() => {
            Log.showInfo(TAG, `showScreenLockWindow finish`);
            this.checkPinAuthProperty(() => {
            });
            Log.showInfo(TAG, `screenlock status:${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