【OpenHarmony3.1】【分布式技术】分布式手写板 精华

鸿蒙张荣超
发布于 2022-4-6 21:42
浏览
5收藏

1.介绍

基于TS扩展的声明式开发范式开发一个分布式手写板应用。涉及的OS特性有分布式拉起和分布式数据管理,使用这两个特性实现不同设备间拉起与笔迹同步,即每台设备在书写的时候,连接的其他设备都能实时同步笔迹,效果图如下:

【OpenHarmony3.1】【分布式技术】分布式手写板-鸿蒙开发者社区

【OpenHarmony3.1】【分布式技术】分布式手写板-鸿蒙开发者社区

2.代码结构

整个工程的代码结构如下:

【OpenHarmony3.1】【分布式技术】分布式手写板-鸿蒙开发者社区

  • common:存放公共资源

    media:存放图片

  • model:存放数据模型类

  • KvStoreModel.ts:分布式数据存储类

  • RemoteDeviceModel.ts:远程设备类

  • pages:存放页面

    index.ets:主页面

  • config.json:配置文件

3.编写数据类对象

  1. 编写分布式数据类对象

    我们需要创建RemoteDeviceModel类来完成远程设备管理的初始化,RemoteDeviceModel .ts代码如下:

    import deviceManager from '@ohos.distributedHardware.deviceManager';
    var SUBSCRIBE_ID = 100;
    export default class RemoteDeviceModel {
      // 设备列表
      deviceList: any[] = []
      // 回调
      callback: any
      // 设备管理Manager
      #deviceManager: any
      // 构造方法
      constructor() {
      }
      //注册设备回调方法
      registerDeviceListCallback(callback) {
        if (typeof (this.#deviceManager) === 'undefined') {
            let self = this;
            deviceManager.createDeviceManager('com.ohos.distributedRemoteStartFA', (error, value) => {
                if (error) {
                    console.error('createDeviceManager failed.');
                    return;
                }
                self.#deviceManager = value;
                self.registerDeviceListCallback_(callback);
            });
        } else {
            this.registerDeviceListCallback_(callback);
        }
      }
      //注册设备回调方法
      registerDeviceListCallback_(callback) {
        this.callback = callback;
        if (this.#deviceManager == undefined) {
            this.callback();
            return;
        }  
    
        console.info('CookBook[RemoteDeviceModel] getTrustedDeviceListSync begin');
        var list = this.#deviceManager.getTrustedDeviceListSync();
        if (typeof (list) != 'undefined' && typeof (list.length) != 'undefined') {
            this.deviceList = list;
        }
        this.callback(); 
        let self = this;
        this.#deviceManager.on('deviceStateChange', (data) => {
            switch (data.action) {
                case 0:
                self.deviceList[self.deviceList.length] = data.device;
                self.callback();
                if (self.authCallback != null) {
                    self.authCallback();
                    self.authCallback = null;
                }
                break;
                case 2:
                if (self.deviceList.length > 0) {
                    for (var i = 0; i < self.deviceList.length; i++) {
                        if (self.deviceList[i].deviceId === data.device.deviceId) {
                            self.deviceList[i] = data.device;
                            break;
                        }
                    }
                }
                self.callback();
                break;
                case 1:
                  if (self.deviceList.length > 0) {
                      var list = [];
                      for (var i = 0; i < self.deviceList.length; i++) {
                          if (self.deviceList[i].deviceId != data.device.deviceId) {
                              list[i] = data.device;
                          }
                      }
                      self.deviceList = list;
                  }
                  self.callback();
                  break;
                  default:
                      break;
              }
          });
          this.#deviceManager.on('deviceFound', (data) => {
            console.info('CookBook[RemoteDeviceModel] deviceFound data=' + JSON.stringify(data));
            console.info('CookBook[RemoteDeviceModel] deviceFound self.deviceList=' + self.deviceList);
            console.info('CookBook[RemoteDeviceModel] deviceFound self.deviceList.length=' + self.deviceList.length);
            for (var i = 0; i < self.discoverList.length; i++) {
                if (self.discoverList[i].deviceId === data.device.deviceId) {
                    console.info('CookBook[RemoteDeviceModel] device founded, ignored');
                    return;
                }
            }
            self.discoverList[self.discoverList.length] = data.device;
            self.callback();
          });
          this.#deviceManager.on('discoverFail', (data) => {
            console.info('CookBook[RemoteDeviceModel] discoverFail data=' + JSON.stringify(data));
          });
          this.#deviceManager.on('serviceDie', () => {
            console.error('CookBook[RemoteDeviceModel] serviceDie');
          });  
    
          SUBSCRIBE_ID = Math.floor(65536 * Math.random());
          var info = {
            subscribeId: SUBSCRIBE_ID,
            mode: 0xAA,
            medium: 2,
            freq: 2,
            isSameAccount: false,
            isWakeRemote: true,
            capability: 0
          };
          console.info('CookBook[RemoteDeviceModel] startDeviceDiscovery ' + SUBSCRIBE_ID);
          this.#deviceManager.startDeviceDiscovery(info);
      }
      //身份验证
      authDevice(deviceId, callback) {
        console.info('CookBook[RemoteDeviceModel] authDevice ' + deviceId);
        for (var i = 0; i < this.discoverList.length; i++) {
            if (this.discoverList[i].deviceId === deviceId) {
                console.info('CookBook[RemoteDeviceModel] device founded, ignored');
                let extraInfo = {
                    "targetPkgName": 'com.ohos.distributedRemoteStartFA',
                    "appName": 'demo',
                    "appDescription": 'demo application',
                    "business": '0'
                };
                let authParam = {
                    "authType": 1,
                    "appIcon": '',
                    "appThumbnail": '',
                    "extraInfo": extraInfo
                };
                console.info('CookBook[RemoteDeviceModel] authenticateDevice ' + JSON.stringify(this.discoverList[i]));
                let self = this;
                this.#deviceManager.authenticateDevice(this.discoverList[i], authParam, (err, data) => {
                    if (err) {
                        console.info('CookBook[RemoteDeviceModel] authenticateDevice failed, err=' + JSON.stringify(err));
                        self.authCallback = null;
                    } else {
                        console.info('CookBook[RemoteDeviceModel] authenticateDevice succeed, data=' + JSON.stringify(data));
                        self.authCallback = callback;
                    }
                });
            }
        }
      }
      //取消注册设备回调方法
      unregisterDeviceListCallback() {
        console.info('CookBook[RemoteDeviceModel] stopDeviceDiscovery ' + SUBSCRIBE_ID);
        this.#deviceManager.stopDeviceDiscovery(SUBSCRIBE_ID);
        this.#deviceManager.off('deviceStateChange');
        this.#deviceManager.off('deviceFound');
        this.#deviceManager.off('discoverFail');
        this.#deviceManager.off('serviceDie');
        this.deviceList = [];
      }
    }
    
  2. 编写远程设备类对象

    我们需要创建KvStoreModel类来完成分布式数据管理的初始化工作。首先调用distributedData.createKVManager接口创建一个KVManager对象实例,用于管理数据库对象。然后调用KVManager.getKVStore接口创建并获取KVStore数据库。最后对外提供put、setDataChangeListener方法用于数据写入和订阅数据更新通知。KvStoreModel.ts代码如下:

    import distributedData from '@ohos.data.distributeddata';
    const STORE_ID = 'DrawBoard_kvstore';
    
    export default class KvStoreModel {
      kvManager: any;
      kvStore: any;
      constructor() {
      }
    // 创建createKvStore对象实例
      createKvStore(callback: any) {
        if (typeof (this.kvStore) === 'undefined') {
          var config = {
            bundleName: 'com.huawei.cookbook',
            userInfo: {
              userId: '0',
              userType: 0
            }
          };
          let self = this;
          console.info('DrawBoard[KvStoreModel] createKVManager begin');
          distributedData.createKVManager(config).then((manager) => {
            console.info('DrawBoard[KvStoreModel] createKVManager success, kvManager=' + JSON.stringify(manager));
            self.kvManager = manager;
            var options = {
              createIfMissing: true,
              encrypt: false,
              backup: false,
              autoSync: true,
              kvStoreType: 1,
              schema: '',
              securityLevel: 3,
            };
            console.info('DrawBoard[KvStoreModel] kvManager.getKVStore begin');
            self.kvManager.getKVStore(STORE_ID, options).then((store: any) => {
              console.info('DrawBoard[KvStoreModel] getKVStore success, kvStore=' + store);
              self.kvStore = store;
              callback();
            });
            console.info('DrawBoard[KvStoreModel] kvManager.getKVStore end');
          });
          console.info('DrawBoard[KvStoreModel] createKVManager end');
        } else {
          callback();
        }
      }
      // 添加数据
      put(key: any, value: any) {
        if (typeof (this.kvStore) === 'undefined') {
          return;
        }
        console.info('DrawBoard[KvStoreModel] kvStore.put ' + key + '=' + value);
        this.kvStore.put(key, value).then((data: any) => {
          this.kvStore.get(key).then((data:any) => {
            console.info('DrawBoard[KvStoreModel] kvStore.get ' + key + '=' + JSON.stringify(data));
          });
          console.info('DrawBoard[KvStoreModel] kvStore.put ' + key + ' finished, data=' + JSON.stringify(data));
        }).catch((err: JSON) => {
          console.error('DrawBoard[KvStoreModel] kvStore.put ' + key + ' failed, ' + JSON.stringify(err));
        });
      }
      // 获取数据
       get(key: any,callback: any) {
         this.createKvStore(() => {
           this.kvStore.get(key, function (err: any ,data: any) {
             console.log("get success data: " + data);
             callback(data);
           });
         })
       }
      // 监听数据变化
      setDataChangeListener(callback: any) {
        let self = this;
        this.createKvStore(() => {
          self.kvStore.on('dataChange', 1, (data: any) => {
            if (data.updateEntries.length > 0) {
              callback(data);
            }
          });
        });
      }
    }
    

4.页面设计

分布式手写板页面主要由全屏Path绘制区、顶部操作栏组成。为了实现弹框选择设备的效果,在最外层添加了自定义弹框组件。Path组件设置为全屏显示,根据手指触摸的屏幕坐标直接通过Path绘制轨迹;顶部操作栏加入撤回图标、设备选择图标;自定义弹框加入标题、设备列表。页面样式请在参考这一节中查看,页面布局在index.ets中实现。

在index.ets中按照如下步骤编写:

  1. 页面整体布局

    @Entry
    @Component
    struct Index {
      build() {
        Column({ space: 1 }) {
          // 用于标题栏布局
          Flex() {
          }.backgroundColor(Color.Grey).width('100%').height('10%')
          // 用于Path绘制区布局
          Flex() {
          }.width('100%').height('90%')
        }.height('100%').width('100%')
      }
    
  2. 标题栏布局

    @Entry
    @Component
    struct Index {
      build() {
        Column({ space: 1 }) {
          Flex() {
            Image($r('app.media.goback')).width(70).height(70).position({ x: 30, y: 0 })
            Image($r('app.media.ic_hop')).width(70).height(70)
              .align(Alignment.TopEnd)
              .flexGrow(1)
              .position({ x: 375, y: 0 })
          }.backgroundColor(Color.Grey).width('100%').height('10%')
          ...
        }.height('100%').width('100%')
      }
    
  3. Path绘制区布局

    @Entry
    @Component
    struct Index {
      build() {
        Column({ space: 1 }) {
          Flex() {
            ...
          }.backgroundColor(Color.Grey).width('100%').height('10%')
          Flex() {
            Path().commands(this.pathCommands).strokeWidth(4).fill('none').stroke(Color.Black)
              .width('100%')
              .height('100%')
          }.width('100%').height('90%')
        }.height('100%').width('100%')
      }
    
  4. 自定义弹框设计并引入到主页面中

    1. 自定义弹框设计

      @CustomDialog
      struct CustomDialogExample {
        controller: CustomDialogController
        cancel: () => void
        confirm: (deviceId, deviceName) => void
        startAbility: (deviceId, deviceName, positionList) => void
        deviceList:() => void
        positionList:() => void
        build() {
          Column() {
            Text('设备列表').width('70%').fontSize(20).margin({ top: 10, bottom: 10 })
            Flex({ justifyContent: FlexAlign.SpaceAround }) {
              List({ space: 20, initialIndex: 0 }) {
                ForEach(this.deviceList, (item) => {
                  ListItem() {
                    Text('' + item.name)
                      .width('100%').height(100).fontSize(16)
                      .textAlign(TextAlign.Center).borderRadius(10).backgroundColor(0xFFFFFF)
                      .onClick((event: ClickEvent) =>{
                        this.controller.close();
                        this.startAbility(item.id, item.name, this.positionList)
                      })
                  }.editable(true)
                }, item => item.id)
              }
              .listDirection(Axis.Vertical) // 排列方向
              .divider({ strokeWidth: 2, color: 0xFFFFFF, startMargin: 20, endMargin: 20 }) // 每行之间的分界线
              .edgeEffect(EdgeEffect.None) // 滑动到边缘无效果
              .chainAnimation(false) // 联动特效关闭
              .onScrollIndex((firstIndex: number, lastIndex: number) => {
                console.info('first' + firstIndex)
                console.info('last' + lastIndex)
              })
            }.margin({ bottom: 10 })
          }
        }
      }
      
    2. 引入到主页面

      @Entry
      @Component
      struct Index {
        ...
        dialogController: CustomDialogController = new CustomDialogController({
          builder: CustomDialogExample({ cancel: this.onCancel, confirm: this.onAccept, deviceList: this.deviceList,positionList: this.positionList,startAbility: this.startAbilityContinuation }),
          cancel: this.existApp,
          autoCancel: true,
          deviceList: this.deviceList,
          positionList: this.positionList
        })
        onCancel() {
          console.info('Callback when the first button is clicked')
        }
        onAccept() {
          console.info('Click when confirm')
        }
        existApp() {
          console.info('Click the callback in the blank area')
        }
        build() {
         ...
        }
      }
      
  5. 为页面设置原始数据

    1. 在index.ets文件的顶部设置常量数据

      // 默认设备
      var DEVICE_LIST_LOCALHOST = { name: '本机', id: 'localhost' };
      // 用于存放点位信息的key值常量
      const CHANGE_POSITION = 'change_position';
      // path组件Command参数初始化值
      const DEfAULT_PATH_COMMAND = '';
      
    2. 在Index组件(Component)中设置基本参数

      @Entry
      @Component
      struct Index {
        // 触控起始位置X轴坐标
        @State startX: number = 0
        // 触控起始位置Y轴坐标
        @State startY: number = 0
        // 触控移动后的位置X轴坐标
        @State moveX: number = 0
        // 触控移动后的位置Y轴坐标
        @State moveY: number = 0
        // 触控结束后的位置X轴坐标
        @State endX: number = 0
        // 触控结束后的位置Y轴坐标
        @State endY: number = 0
        // Path 组件Command属性值,默认为''
        @State pathCommands: string = DEfAULT_PATH_COMMAND
        // 设备列表
        @State deviceList: any[] = []
        // BUNDLE_NAME
        private BUNDLE_NAME: string = "com.huawei.cookbook";
        // 分布式数据库类对象
        private kvStoreModel: KvStoreModel = new KvStoreModel()
        // 远程设备类对象
        private remoteDeviceModel: RemoteDeviceModel = new RemoteDeviceModel()
        // 点位集合
        @State positionList: any[] = []
        // 初始化数据
        @State initialData: any[] = []
        // 是否同步
        private isNeedSync: boolean = false
        // 间隔ID
        private intervalID: number = 0
        ...
        build() {
        ...
        }
      }
      

5.设备拉起

点击操作栏“分享图标”,弹出设备选择列表,选中设备后拉起该设备的手写板页面。这里使用分布式拉起实现设备拉起功能,首先调用FeatureAbility.getDeviceList接口获取设备信息列表,然后调用FeatureAbility.startAbility接口拉起目标设备的FA。此功能在index.js中实现。

【OpenHarmony3.1】【分布式技术】分布式手写板-鸿蒙开发者社区【OpenHarmony3.1】【分布式技术】分布式手写板-鸿蒙开发者社区

  1. 分享图标添加点击事件

    Image($r('app.media.ic_hop')).width(70).height(70)
      .align(Alignment.TopEnd)
      .flexGrow(1)
      .position({ x: 375, y: 0 })
      .onClick((event: ClickEvent) =>{
        this.onContinueAbilityClick()
      })
    
  2. 分布式拉起方法实现

    onContinueAbilityClick() {
        console.info('DrawBoard[IndexPage] onContinueAbilityClick');
        let self = this;
        this.remoteDeviceModel.registerDeviceListCallback(() => {
            console.info('DrawBoard[IndexPage] registerDeviceListCallback, callback entered');
            var list = [];
            list[0] = DEVICE_LIST_LOCALHOST
            var deviceList = self.remoteDeviceModel.deviceList;
            console.info('DrawBoard[IndexPage] on remote device updated, count=' + deviceList.length);
            for (var i = 0; i < deviceList.length; i++) {
                console.info('DrawBoard[IndexPage] device ' + i + '/' + deviceList.length + ' deviceId='
                + deviceList[i].deviceId + ' deviceName=' + deviceList[i].deviceName + ' deviceType='
                + deviceList[i].deviceType);
                list[i + 1] = {
                    name: deviceList[i].deviceName,
                    id: deviceList[i].deviceId,
                };
            }
            self.deviceList = list;
            self.dialogController.open()
        });
    }
    

6.笔记绘制

Path组件所在的Flex容器组件添加点击事件,并实现记录触控点位信息,绘制轨迹的功能。

  1. 添加点击事件

    Flex() {
      Path().commands(this.pathCommands).strokeWidth(4).fill('none').stroke(Color.Black)
            .width('100%')
            .height('100%')
        }.onTouch((event: TouchEvent) => {
            this.onTouchEvent(event)
    }).width('100%').height('90%')
    
  2. 现记录触控点位信息的方法

    onTouchEvent(event: TouchEvent) {
       let position = {};
       switch(event.type){
         // 触控按下
         case TouchType.Down:
           this.startX = event.touches[0].x
           this.startY = event.touches[0].y
           this.pathCommands += ' M' + this.startX + ' ' + this.startY
           position.isFirstPosition = true;
           position.positionX = this.startX;
           position.positionY = this.startY;
           this.pushData(position);
           break;
         // 触控移动
         case TouchType.Move:
           this.moveX = event.touches[0].x
           this.moveY = event.touches[0].y
           this.pathCommands += ' L' + this.moveX + ' ' + this.moveY
           position.isFirstPosition = false;
           position.positionX = this.moveX;
           position.positionY = this.moveY;
           this.pushData(position);
           break;
         // 触控抬起
         case TouchType.Up:
           this.endX = event.touches[0].x
           this.endY = event.touches[0].y
           position.isFirstPosition = false;
           position.positionX = this.moveX;
           position.positionY = this.moveY;
           this.pushData(position);
           break;
         default:
           break
       }
    }
    

7.笔记撤回

笔迹绘制时已经记录了所有笔迹上的坐标点,点击“撤回”按钮后,对记录的坐标点进行倒序删除,当删除最后一笔绘制的起始点坐标后停止删除,然后清空画布对剩余的坐标点进行重新绘制,至此撤回操作完成。此功能在index.ets中实现,代码如下:

  1. 添加撤回事件

    Image($r('app.media.goback')).width(70).height(70).position({ x: 30, y: 0 })
      .onClick((event: ClickEvent) =>{
        this.goBack()
      })
    
  2. 编写撤回事件

    // 撤回上一笔绘制
    goBack() {
      if (this.positionList.length > 0) {
        for (let i = this.positionList.length - 1; i > -1; i--) {
          if (this.positionList[i].isFirstPosition) {
            this.positionList.pop();
            this.redraw();
            break;
          } else {
            this.positionList.pop();
          }
        }
        // 保存点位信息
        this.kvStoreModel.put(CHANGE_POSITION, JSON.stringify(this.positionList));
      }
    }
    

8.轨迹同步

在设备拉起、笔迹绘制、笔迹撤回时我们需要将对应数据同步到其他设备。

【OpenHarmony3.1】【分布式技术】分布式手写板-鸿蒙开发者社区

  1. 设备拉起时,通过positionList将笔迹数据发送给目标设备,目标设备在aboutToAppear时将接收到的笔迹数据用Path绘制出来,从而实现笔迹的同步。此功能在index.ets中实现,关键代码如下:

    发送端

    startAbilityContinuation(deviceId: string, deviceName: string,positionList: any[] ) {
        // 参数
        var params = {
          // 点位集合
          positionList: JSON.stringify(positionList)
        }
        // 拉起的设备、ability信息等
        var wantValue = {
            bundleName: 'com.huawei.cookbook',
            abilityName: 'com.huawei.distributedatabasedrawetsopenh.MainAbility',
            deviceId: deviceId,
            parameters: params
        };
        // 分布式拉起
        featureAbility.startAbility({
            want: wantValue
        }).then((data) => {
            console.info('DrawBoard[IndexPage] featureAbility.startAbility finished, ' + JSON.stringify(data));
        });
    }
    

    接收端

    // 函数在创建自定义组件的新实例后,在执行其build函数之前执行
      async aboutToAppear() {
         console.info('DrawBoard[IndexPage] aboutToAppear begin');
         this.initialData = []
         let self = this
         // 获取接收的数据
         await featureAbility.getWant()
           .then((Want) => {
             self.positionList = JSON.parse(Want.parameters.positionList)
           }).catch((error) => {
           console.error('Operation failed. Cause: ' + JSON.stringify(error));
         })
         //如果传来的点位集合不为空
         if (this.positionList.length > 0) {
          this.positionList.forEach((num) => {
            this.initialData.push(num);
          });
         // 初始化绘制方法
          this.initDraw();
        }
        // 监听分布式数据库中点位信息变化
        this.kvStoreModel.setDataChangeListener((data) => {
          self.positionList = [];
          data.updateEntries.forEach((num) => {
            const list = JSON.parse(num.value.value);
            console.info('DrawBoard[IndexPage] setDataChangeListener list=' + JSON.stringify(list))
            if(list.length === 0) {
              self.pathCommands = DEfAULT_PATH_COMMAND
            } else{
              // 如果不为空,则将数据库中的点位信息添加到页面中
              list.forEach((num) => {
                self.positionList.push(num);
              })
                      }
            setTimeout(function() {
              // 重绘路径
              self.redraw();
            }, 10);
          });
        });
      }
    ...
    // 初始化画板轨迹
    initDraw() {
      const self = this;
      self.pathCommands = DEfAULT_PATH_COMMAND
      this.intervalID = setInterval(function() {
        if (self.initialData[0].isFirstPosition) {
          self.pathCommands += ' M' + self.initialData[0].positionX + ' ' + self.initialData[0].positionY
        } else {
          self.pathCommands += ' L' + self.initialData[0].positionX + ' ' +  self.initialData[0].positionY
        }
        self.initialData.shift();
        if (self.initialData.length < 1) {
          clearInterval(self.intervalID);
          self.intervalID = 0;
        }
      }, 10);
    }
    
  2. 笔迹绘制时,为了避免分布式数据库写入过于频繁,需要使用定时器setInterval,笔迹数据每100ms写入一次。其他设备通过订阅分布式数据更新通知来获取最新的笔迹数据,然后重新绘制笔迹,从而实现笔迹同步。此功能在index.js中实现,关键代码如下:

    发送端

    // 将绘制笔迹写入分布式数据库
    pushData(position) {
      this.isNeedSync = true;
      this.positionList.push(position);
      const self = this;
    
      // 使用定时器每100ms写入一次
      if (this.intervalID === 0) {
        this.intervalID = setInterval(function() {
          if (self.isNeedSync) {
            self.kvStoreModel.put(CHANGE_POSITION, JSON.stringify(self.positionList));
            self.isNeedSync = false;
          }
        }, DATA_PUT_DELAY);
      }
    },
    

    接收端

    onInit() {
      ...
      // 订阅分布式数据更新通知
      this.kvStoreModel.setDataChangeListener((data) => {
        data.updateEntries.forEach((num) => {
          this.positionList = [];
          const list = JSON.parse(num.value.value);
          list.forEach((num) => {
            this.positionList.push(num);
          })
          const self = this;
          setTimeout(function() {
            self.redraw();
          }, DRAW_DELAY);
        });
      });
    },
    // 重新绘制笔迹
    redraw() {
      // 清空画布
      this.ctx.clearRect(0, 0, CLEAR_WIDTH, CLEAR_HEIGHT);
      this.positionList.forEach((num) => {
        if (num.isStartPosition) {
          this.ctx.beginPath();
          this.ctx.moveTo(num.positionX, num.positionY);
        } else {
          this.ctx.lineTo(num.positionX, num.positionY);
          this.ctx.stroke();
        }
      });
    },
    
  3. 笔迹撤回时,直接将撤回后的笔迹数据写入分布式数据库,其他设备也是通过订阅分布式数据更新通知来获取最新的笔迹数据,最终实现笔迹同步,这里不再做讲解。

以上内容转载自OpenHarmony官方Gitee,部分内容有删减。

标签
已于2022-4-6 22:52:42修改
9
收藏 5
回复
举报
4条回复
按时间正序
/
按时间倒序
红叶亦知秋
红叶亦知秋

感谢张老师整理分享。

回复
2022-4-7 10:07:49
起名字困难户
起名字困难户

感谢张老师整理分享

回复
2022-4-7 10:26:29
SummerRic
SummerRic

日常追张老师的文章呀。✌️

回复
2022-4-7 11:03:59
Soon_L
Soon_L

感谢张老师分享

回复
2022-4-7 12:45:05
回复
    相关推荐