HarmonyOS分布式应用农业大棚数据监测解读-农业大棚监测系统

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引言

分布式数据服务(Distributed Data Service，DDS) 为应用程序提供不同设备间数据库数据分布式的能力。通过调用分布式数据接口，应用程序将数据保存到分布式数据库中。通过结合帐号、应用和数据库三元组，分布式数据服务对属于不同应用的数据进行隔离，保证不同应用之间的数据不能通过分布式数据服务互相访问。在通过可信认证的设备间，分布式数据服务支持应用数据相互同步，为用户提供在多种终端设备上最终一致的数据访问体验。

功能介绍

此次基于HarmonyOS的分布式数据服务能力，一方面模拟农业大棚的温度、湿度、二氧化碳浓度等数据的采集，并在手机端进行采集数据展示;另一方面，可以把手机端的数据，迁移到其他设备(如智慧屏、手表、PAD等)，可以做一些数据分析展示。

前提：

在不同设备之间，要实现分布式数据服务的同步能力，需要同一个华为账号登录、并一个应用包名、同一个网络之间进行，也可以是两个设备同时开启蓝牙。

开发指南

1.在config.json中添加permisssion权限

// 添加在abilities同一目录层级

"reqPermissions": [ 
    { 
        "name": "ohos.permission.DISTRIBUTED_DATASYNC" 
    } 
]

2.在MainAbility中添加权限

@Override 
public void onStart(Intent intent) { 
  super.onStart(intent); 
  super.setMainRoute(MainAbilitySlice.class.getName()); 
  //实现Ability的代码中显式声明需要使用多设备协同访问的权限 
  requestPermissionsFromUser(new String[]{ 
      "ohos.permission.DISTRIBUTED_DATASYNC"}, 0); 
 
}

3.根据配置构造分布式数据库管理类实例KvManager以及创建分布式数据库对象SingleKvStore

//实现数据库的初始化

// 初入的参数context: Context context = getApplicationContext()获得；storeId为分布式数据库id,String类型，可自行定义，例如“testApp”。 
public static SingleKvStore initOrGetDB(Context context, String storeId) { 
  KvManagerConfig kvManagerConfig = new KvManagerConfig(context); 
  kvManager = KvManagerFactory.getInstance().createKvManager(kvManagerConfig); 
  Options options = new Options(); 
  options.setCreateIfMissing(true) 
    .setEncrypt(false) 
    .setKvStoreType(KvStoreType.SINGLE_VERSION) //数据库类型：单版本分布式数据库 
    .setAutoSync(true); //自动同步为true,手动同步为false 
  singleKvStore = kvManager.getKvStore(options, storeId); 
  return singleKvStore; 
}

4.将数据写入单版本分布式数据库

//以key-value形式存储到分布式数据库 
try { 
  //将采集的数据以key-value形式存入分布式数据库中 
  DataModle dataModle=new DataModle(); 
  dataModle.setTemp(temp); 
  dataModle.setHumi(humi); 
  dataModle.setCo2(co2); 
  String jsonString= ZSONObject.toZSONString(dataModle); 
  singleKvStore.putString("data",jsonString); 
} catch (KvStoreException e) { 
  LogUtils.debug(TAG, "DataServiceAbility::updateData()"+e.getMessage()); 
}

5.订阅分布式数据变化。客户端需要实现KvStoreObserver接口，监听数据变化

//订阅类型SubscribeType.SUBSCRIBE_TYPE_ALL意思可以同步到本机和其他外围设备 
  innerKvStoreObserver = new InnerKvStoreObserver(); 
  singleKvStore.subscribe(SubscribeType.SUBSCRIBE_TYPE_ALL, innerKvStoreObserver); 
} catch (KvStoreException e) { 
  e.printStackTrace(); 
} 
 
public class InnerKvStoreObserver implements KvStoreObserver { 
 
  @Override 
  public void onChange(ChangeNotification changeNotification) { 
    //刷新页面上的数据，同样有一个坑，onChange方法实质上，在一个子线程里执行 
    MainAbilitySlice.taskDispatcher.asyncDispatch(() -> { 
      //在这里执行页面ui组件的显示刷新 
      flushUIData(); 
    }); 
  } 
}

6.获取分布式数据库数据

 //查询分布式数据的数据，获取数据可以通过get（String key）或者 getEntries(String key)方法获取数据 
List<Entry> entries = singleKvStore.getEntries("data"); 
if (entries.size() > 0) { 
  ZSONObject zsonObject = ZSONObject.stringToZSON(entries.get(0).getValue().getString()); 
  double temp = zsonObject.getDouble("temp"); 
  double humi = zsonObject.getDouble("humi"); 
  double co2 = zsonObject.getDouble("co2"); 
  String strTemp = String.format("%.1f", temp); 
  String strHumi = String.format("%.1f", humi); 
  String strCO2 = String.format("%.1f", co2); 
  tvTemp.setText(strTemp+"℃"); 
  tvHumi.setText(strHumi+"%RH"); 
  tvCo2.setText(strCO2+"ppm"); 
}

7.解除订阅,一般在页面销毁时调用，也就是在onStop()中调用

if (singleKvStore != null) { 
  singleKvStore.unSubscribe(innerKvStoreObserver); 
}

8.同步数据到其他设备。获取已连接的设备列表，选择同步方式进行数据同步

List<DeviceInfo> onlineDevices = DeviceManager 
    .getDeviceList(DeviceInfo.FLAG_GET_ONLINE_DEVICE); 
List<String> deviceIdList = new ArrayList<>(); 
for (DeviceInfo deviceInfo : deviceInfoList) { 
    deviceIdList.add(deviceInfo.getId()); 
} 
//迁移到指定设备，传入设备ID列表 
singleKvStore.sync(deviceIdList, SyncMode.PUSH_ONLY);

项目中采用在后台service中开启定时任务，模拟农业大棚采集数据，实时保存数据到分布式数据库，然后在主界面，监听数据变化，实时更新数据。当选择迁移的设备时，就可以把数据迁移到相应设备。

#星光计划2.0#HarmonyOS分布式应用农业大棚数据监测解读-鸿蒙HarmonyOS技术社区

手机侧应用刚打开时界面

TV侧应用刚打开时界面

点击右上角迁移按钮，并选择迁移设备(P40-0036)

迁移后的左侧设备数据和右侧设备数据就会同步一致

附上源码

手机端

1. PhoneAbilitySlice

public class PhoneAbilitySlice extends AbilitySlice { 
  private SingleKvStore singleKvStore; 
  private InnerKvStoreObserver innerKvStoreObserver; 
  private Intent serviceIntent; 
  private Text tvTemp; 
  private Text tvHumi; 
  private Text tvCo2; 
  private DeviceData chooseDevice; 
  private DevicesProvider devicesProvider; 
  private CommonDialog commonDialog; 
  private String TAG="MainAbilitySlice"; 
  private List<String>deviceIdList; 
  @Override 
  public void onStart(Intent intent) { 
    super.onStart(intent); 
    super.setUIContent(ResourceTable.Layout_ability_main); 
    //设置沉浸式状态栏  getWindow().addFlags(WindowManager.LayoutConfig.MARK_TRANSLUCENT_STATUS); 
    initView(); 
    initService(); 
    try { 
      //获取数据库 
      singleKvStore = DBUtils.initOrGetDB(this, DBUtils.KV_STORE_NAME); 
      innerKvStoreObserver = new InnerKvStoreObserver(); 
      //订阅分布式数据库 
      singleKvStore.subscribe(SubscribeType.SUBSCRIBE_TYPE_ALL, innerKvStoreObserver); 
    } catch (KvStoreException e) { 
      LogUtils.debug(TAG, "MainAbilitySlice::onStart/"+e.getMessage()); 
    } 
  } 
  private void initService() { 
    //启动ServiceAbility 
    serviceIntent = new Intent(); 
    Operation operation = new Intent.OperationBuilder() 
        .withDeviceId("") 
        .withBundleName("com.isoftstone.distributeddata") 
        .withAbilityName("com.isoftstone.distributeddata.DataServiceAbility") 
        .build(); 
    serviceIntent.setOperation(operation); 
    startAbility(serviceIntent); 
  } 
  private void initView() { 
    tvTemp = (Text) findComponentById(ResourceTable.Id_text_temp); 
    tvHumi = (Text) findComponentById(ResourceTable.Id_text_humi); 
    tvCo2 = (Text) findComponentById(ResourceTable.Id_text_co2); 
    Button bt = (Button) findComponentById(ResourceTable.Id_bt_continue); 
    bt.setClickedListener(component -> { 
      if (component.getId() == ResourceTable.Id_bt_continue) { 
        //查看在线设备 
        List<DeviceInfo> onlineDevices = DeviceManager 
            .getDeviceList(DeviceInfo.FLAG_GET_ONLINE_DEVICE); 
        List<DeviceData> deviceDatas = new ArrayList<>(); 
        if (onlineDevices == null || onlineDevices.size() < 1) { 
          CustomerDialog.showToastDialog(getAbility(), "无组网在线设备"); 
        } else { 
          for (DeviceInfo deviceInfo : onlineDevices) { 
            deviceDatas.add(new DeviceData(false, deviceInfo)); 
          } 
          showDevices(deviceDatas); 
        } 
      } 
    }); 
  } 
  private void showDevices(List<DeviceData> deviceDatas) { 
    chooseDevice = null; 
    commonDialog = new CommonDialog(this); 
    Component component = LayoutScatter.getInstance(this) 
        .parse(ResourceTable.Layout_dialog_layout_device, null, true); 
    ListContainer listContainer = (ListContainer) component.findComponentById(ResourceTable.Id_list_container_device); 
    devicesProvider = new DevicesProvider(this, deviceDatas); 
    listContainer.setItemProvider(devicesProvider); 
    listContainer.setItemClickedListener((listContainer1, component1, position, l) -> { 
      chooseDevice = deviceDatas.get(position); 
      for (int i = 0; i < deviceDatas.size(); i++) { 
        if (i == position) { 
          deviceDatas.set(i, new DeviceData(true, deviceDatas.get(i).getDeviceInfo())); 
        } else { 
          deviceDatas.set(i, new DeviceData(false, deviceDatas.get(i).getDeviceInfo())); 
        } 
      } 
      devicesProvider = new DevicesProvider(this, deviceDatas); 
      listContainer1.setItemProvider(devicesProvider); 
    }); 
    Text tvCancle = (Text) component.findComponentById(ResourceTable.Id_operate_no); 
    Text tvSure = (Text) component.findComponentById(ResourceTable.Id_operate_yes); 
 
    tvCancle.setClickedListener(component12 -> commonDialog.destroy()); 
 
    tvSure.setClickedListener(component13 -> { 
      if (chooseDevice == null) { 
        CustomerDialog.showToastDialog(this, "请选择设备"); 
      } else { 
        try { 
          deviceIdList=new ArrayList<>(); 
          deviceIdList.add(chooseDevice.getDeviceInfo().getDeviceId()); 
          //手动同步的设备列表 
          singleKvStore.sync(deviceIdList, SyncMode.PUSH_ONLY); 
          commonDialog.destroy(); 
        } catch (IllegalStateException e) { 
          //流转异常捕获，防止进程存在再次发起流转 
          LogUtils.debug(TAG, "MainAbilitySlice::singleKvStore.sync()/"+e.getMessage()); 
        } 
      } 
    }); 
    commonDialog.setSize(MATCH_PARENT, MATCH_CONTENT); 
    commonDialog.setAlignment(LayoutAlignment.BOTTOM); 
    commonDialog.setCornerRadius(10); 
    commonDialog.setAutoClosable(true); 
    commonDialog.setContentCustomComponent(component); 
    commonDialog.setTransparent(true); 
    commonDialog.show(); 
  } 
  public class InnerKvStoreObserver implements KvStoreObserver { 
 
    @Override 
    public void onChange(ChangeNotification changeNotification) { 
      //onChange方法实质上，在一个子线程里执行 
      getUITaskDispatcher().asyncDispatch(() -> { 
        //在这里执行页面ui组件的显示刷新 
        asyncUpdateData(); 
      }); 
    } 
  } 
  public void asyncUpdateData(){ 
    //查询分布式数据的数据 
    List<Entry> entries = singleKvStore.getEntries("data"); 
    if (entries.size() > 0) { 
      ZSONObject zsonObject = ZSONObject.stringToZSON(entries.get(0).getValue().getString()); 
      double temp = zsonObject.getDouble("temp"); 
      double humi = zsonObject.getDouble("humi"); 
      double co2 = zsonObject.getDouble("co2"); 
      String strTemp = String.format("%.1f", temp); 
      String strHumi = String.format("%.1f", humi); 
      String strCO2 = String.format("%.1f", co2); 
      tvTemp.setText(strTemp+"℃"); 
      tvHumi.setText(strHumi+"%RH"); 
      tvCo2.setText(strCO2+"ppm"); 
      //手动同步的设备列表 
      if(singleKvStore!=null){ 
        if(deviceIdList!=null&&deviceIdList.size()>0){ 
          singleKvStore.sync(deviceIdList, SyncMode.PUSH_ONLY); 
        } 
      } 
    } 
  } 
 
  @Override 
  public void onActive() { 
    super.onActive(); 
  } 
  @Override 
  public void onForeground(Intent intent) { 
    super.onForeground(intent); 
  } 
  @Override 
  protected void onStop() { 
    super.onStop(); 
    //销毁service 
    stopAbility(serviceIntent); 
    //删除数据库 
    DBUtils.clearDB(); 
    //解除订阅 
    if (singleKvStore != null) { 
      if(innerKvStoreObserver!=null){ 
        singleKvStore.unSubscribe(innerKvStoreObserver); 
      } 
    } 
  } 
}

2. DataServiceAbility

public class DataServiceAbility extends Ability { 
  private static final HiLogLabel LABEL_LOG = new HiLogLabel(3, 0xD001100, "Demo"); 
  private SingleKvStore singleKvStore; 
  private NotificationRequest request; 
  private Timer mTimer; 
  private TimerTask mTimerTask; 
  private String TAG="DataServiceAbility"; 
  @Override 
  public void onStart(Intent intent) { 
    LogUtils.debug(TAG, "DataServiceAbility::onStart"); 
    super.onStart(intent); 
    //创建前台service 
    createForeService(); 
    try { 
      singleKvStore = DBUtils.initOrGetDB(this, DBUtils.KV_STORE_NAME); 
    } catch (Exception e) { 
      LogUtils.debug(TAG, "DataServiceAbility::onStart()"+e.getMessage()); 
    } 
    //每隔10秒，模拟传感器采集一次大棚数据。 
    if(mTimer==null){ 
      mTimer=new Timer(); 
    } 
    if(mTimerTask==null){ 
      mTimerTask=new TimerTask() { 
        @Override 
        public void run() { 
          updateData(); 
        } 
      }; 
    } 
    mTimer.schedule(mTimerTask,0,1000*10); 
  } 
  private void updateData() { 
    //获取随机温度0-100； 
    double temp= new Random().nextDouble()*100; 
    //获取随机湿度0-100； 
    double humi= new Random().nextDouble()*100; 
    //获取随机CO2浓度0-1000 
    double co2= new Random().nextDouble()*1000; 
    try { 
      //将采集的数据以key-value形式存入分布式数据库中 
      DataModle dataModle=new DataModle(); 
      dataModle.setTemp(temp); 
      dataModle.setHumi(humi); 
      dataModle.setCo2(co2); 
      String jsonString= ZSONObject.toZSONString(dataModle); 
      singleKvStore.putString("data",jsonString); 
    } catch (KvStoreException e) { 
      LogUtils.debug(TAG, "DataServiceAbility::updateData()"+e.getMessage()); 
    } 
  } 
  private void createForeService() { 
    // 创建通知，其中1005为notificationId 
    request = new NotificationRequest(1005); 
    NotificationRequest.NotificationNormalContent content = new NotificationRequest.NotificationNormalContent(); 
    content.setTitle("农业大棚").setText("数据采集服务开启中"); 
    NotificationRequest.NotificationContent notificationContent = new NotificationRequest.NotificationContent(content); 
    request.setContent(notificationContent); 
    //绑定通知，1005为创建通知时传入的notificationId 
    keepBackgroundRunning(1005, request); 
  } 
  @Override 
  public void onBackground() { 
    super.onBackground(); 
    LogUtils.debug(TAG, "DataServiceAbility::onBackground()"); 
  } 
 
  @Override 
  public void onStop() { 
    super.onStop(); 
    if (mTimerTask != null) { 
      mTimerTask.cancel(); 
      mTimerTask=null; 
    } if (mTimer != null) { 
      mTimer.cancel(); 
      mTimer=null; 
    } 
    //停止前台Service。 
    cancelBackgroundRunning(); 
    LogUtils.debug(TAG, "DataServiceAbility::onStop()"); 
  } 
 
  @Override 
  public void onCommand(Intent intent, boolean restart, int startId) { 
  } 
  @Override 
  public IRemoteObject onConnect(Intent intent) { 
    return null; 
  } 
  @Override 
  public void onDisconnect(Intent intent) { 
  } 
}

3.DBUtils

public class DBUtils { 
  private static KvManager kvManager; 
  private static SingleKvStore singleKvStore; 
  public static String KV_STORE_NAME="farm_data"; 
  //具体的实现数据库的初始化 
  public static SingleKvStore initOrGetDB(Context context, String storeId) { 
    KvManagerConfig kvManagerConfig = new KvManagerConfig(context); 
    kvManager = KvManagerFactory.getInstance().createKvManager(kvManagerConfig); 
    Options options = new Options(); 
    options.setCreateIfMissing(true) 
        .setEncrypt(false) 
        .setKvStoreType(KvStoreType.SINGLE_VERSION) 
        .setAutoSync(false);//自动同步为true,手动同步为false 
    singleKvStore = kvManager.getKvStore(options, storeId); 
    return singleKvStore; 
  } 
  // 如果数据库中的字段有修改，只能先关闭，后删除，然后重新创建才生效 
  public static void clearDB() { 
    kvManager.closeKvStore(singleKvStore); 
    kvManager.deleteKvStore(KV_STORE_NAME); 
  } 
}

4. MainAbility

@Override 
 public void onStart(Intent intent) { 
     super.onStart(intent); 
     super.setMainRoute(PhoneAbilitySlice.class.getName()); 
     //实现Ability的代码中显式声明需要使用多设备协同访问的权限 
     requestPermissionsFromUser(new String[]{"ohos.permission.DISTRIBUTED_DATASYNC",}, 0); 
 }

5. DataModle

public class DataModle { 
  private double temp; 
  private double humi; 
  private double co2; 
  public double getTemp() { 
    return temp; 
  } 
  public void setTemp(double temp) { 
    this.temp = temp; 
  } 
 
  public double getHumi() { 
    return humi; 
  } 
  public void setHumi(double humi) { 
    this.humi = humi; 
  } 
  public double getCo2() { 
    return co2; 
  } 
  public void setCo2(double co2) { 
    this.co2 = co2; 
  } 
}

6. DeviceData

public class DeviceData { 
    private boolean isChecked; 
    private DeviceInfo deviceInfo; 
    /** 
     * DeviceData 
     * 
     * @param isChecked isChecked 
     * @param deviceInfo deviceInfo 
     */ 
    public DeviceData(boolean isChecked, DeviceInfo deviceInfo) { 
        this.isChecked = isChecked; 
        this.deviceInfo = deviceInfo; 
    } 
    public DeviceInfo getDeviceInfo() { 
        return deviceInfo; 
    } 
    public void setDeviceInfo(DeviceInfo deviceInfo) { 
        this.deviceInfo = deviceInfo; 
    } 
    public boolean isChecked() { 
        return isChecked; 
    } 
    public void setChecked(boolean checked) { 
        isChecked = checked; 
    } 
}

7. DevicesProvider

public class DevicesProvider extends BaseItemProvider { 
 
 private List<DeviceData> data; 
 private LayoutScatter layoutScatter; 
 
 public DevicesProvider(Context context, List<DeviceData> data) { 
   this.data = data; 
   this.layoutScatter = LayoutScatter.getInstance(context); 
 } 
 
 @Override 
 public int getCount() { 
   return data.size(); 
 } 
 
 @Override 
 public Object getItem(int i) { 
   return data.get(i); 
 } 
 
 @Override 
 public long getItemId(int i) { 
   return i; 
 } 
 
 @Override 
 public Component getComponent(int position, Component component, 
     ComponentContainer componentContainer) { 
   ViewHolder viewHolder; 
   // component相当于Android中的view，其他的和Android中ListView的适配器adapter差不多。 
   // 名字区别也不大，不过Android中ListView基本被淘汰了。 
   if (component == null) { 
     component = layoutScatter.parse(ResourceTable.Layout_dialog_device_item, null, false); 
     viewHolder = new ViewHolder(); 
     viewHolder.imgType = (Image) component.findComponentById(ResourceTable.Id_item_type); 
     viewHolder.tvName = (Text) component.findComponentById(ResourceTable.Id_item_name); 
     viewHolder.imgCheck = (Image) component.findComponentById(ResourceTable.Id_item_check); 
     component.setTag(viewHolder); 
   } else { 
     viewHolder = (ViewHolder) component.getTag(); 
   } 
   DeviceData deviceData = data.get(position); 
   DeviceType deviceType=deviceData.getDeviceInfo().getDeviceType(); 
   switch (deviceType){ 
     case SMART_WATCH: 
       viewHolder.imgType.setPixelMap(ResourceTable.Media_dv_watch); 
       break; 
     case SMART_PAD: 
       viewHolder.imgType.setPixelMap(ResourceTable.Media_dv_pad); 
       break; 
     case SMART_PHONE: 
       viewHolder.imgType.setPixelMap(ResourceTable.Media_dv_phone); 
       break; 
   } 
   viewHolder.tvName.setText(deviceData.getDeviceInfo().getDeviceName()); 
   if(deviceData.isChecked()){ 
viewHolder.imgCheck.setImageAndDecodeBounds(ResourceTable.Media_check2); }else {  viewHolder.imgCheck.setImageAndDecodeBounds(ResourceTable.Media_uncheck2); 
   } 
   return component; 
 } 
 
 /** 
  * 类似于Android中的listView缓存。 将已经显示在屏幕上的item缓存在ViewHolder中，下次再次出现直接从缓存中读取 
  */ 
 private static class ViewHolder { 
   private Image imgType; 
   private Text tvName; 
   private Image imgCheck; 
 } 
}

8. CustomerDialog

public class CustomerDialog { 
  public static void showToastDialog(Context context, String str) { 
    DirectionalLayout toastLayout = (DirectionalLayout) LayoutScatter.getInstance(context) 
        .parse(ResourceTable.Layout_toast_dialog, null, false); 
    Text text = (Text) toastLayout.findComponentById(ResourceTable.Id_toast); 
    text.setText(str); 
    new ToastDialog(context) 
        .setContentCustomComponent(toastLayout) 
        .setSize(DirectionalLayout.LayoutConfig.MATCH_CONTENT, 
            DirectionalLayout.LayoutConfig.MATCH_CONTENT) 
        .setAlignment(LayoutAlignment.CENTER) 
        .show(); 
  } 
}

9. MyApplication

  @Override 
  public void onInitialize() { 
    super.onInitialize(); 
  } 
}

10. config.json 文件

"app": { 
  "bundleName": " com.isoftstone.distributeddata ", 
  "vendor": "isoftstone", 
  "version": { 
    "code": 1000000, 
    "name": "1.0.0" 
  } 
}, 
"deviceConfig": {}, 
"module": { 
  "package": "com.isoftstone.distributeddata", 
  "name": ".MyApplication", 
  "mainAbility": "com.isoftstone.distributeddata.MainAbility", 
  "deviceType": [ 
    "phone" 
  ], 
  "distro": { 
    "deliveryWithInstall": true, 
    "moduleName": "entry", 
    "moduleType": "entry", 
    "installationFree": false 
  }, 
  "reqPermissions": [ 
    { 
      "name": "ohos.permission.DISTRIBUTED_DATASYNC" 
    }, 
    { 
添加此权限，才能查找分布式在线设备 
      "name": "ohos.permission.GET_DISTRIBUTED_DEVICE_INFO" 
    }, 
    { 
将service设置为前台服务，需要添加的权限 
      "name": "ohos.permission.KEEP_BACKGROUND_RUNNING"  
    } 
  ], 
  "abilities": [ 
    { 
      "skills": [ 
        { 
          "entities": [ 
            "entity.system.home" 
          ], 
          "actions": [ 
            "action.system.home" 
          ] 
        } 
      ], 
      "orientation": "unspecified", 
      "name": "com.isoftstone.distributeddata.MainAbility", 
      "icon": "$media:icon", 
      "description": "$string:mainability_description", 
      "label": "$string:entry_MainAbility", 
      "type": "page", 
      "launchType": "standard" 
    }, 
    { 
      "name": "com.isoftstone.distributeddata.DataServiceAbility", 
      "icon": "$media:icon", 
      "description": "$string:dataserviceability_description", 
      "type": "service", 
      "visible": true, 
      "backgroundModes": [ 
        "dataTransfer", 
        "location" 
      ] 
    } 
 
  ], 
  "metaData": { 
    "customizeData": [ 
      { 
        "name": "hwc-theme", 
        "value": "androidhwext:style/Theme.Emui.NoTitleBar", 
        "extra": "" 
      } 
    ] 
  } 
}

11.ability_main.xml布局文件

<?xml version="1.0" encoding="utf-8"?> 
<DirectionalLayout 
  xmlns:ohos="http://schemas.huawei.com/res/ohos" 
  ohos:height="match_parent" 
  ohos:width="match_parent" 
  ohos:orientation="vertical"> 
 
  <DependentLayout 
    ohos:width="match_parent" 
    ohos:height="match_content" 
    ohos:orientation="horizontal" 
    ohos:top_padding="50vp" 
    ohos:bottom_padding="20vp" 
    ohos:left_padding="20vp" 
    ohos:right_padding="20vp" 
    ohos:background_element="$graphic:background_ability_main"> 
    <Text 
      ohos:width="match_content" 
      ohos:height="match_content" 
      ohos:text="农业大棚数据监测" 
      ohos:text_size="26vp" 
      ohos:text_color="#ffffff" 
      ohos:center_in_parent="true"/> 
    <Button 
      ohos:id="$+id:bt_continue" 
      ohos:width="25vp" 
      ohos:height="25vp" 
      ohos:background_element="$media:conti" 
      ohos:align_parent_right="true" 
      ohos:vertical_center="true"/> 
  </DependentLayout> 
  <DependentLayout 
    ohos:height="match_content" 
    ohos:width="match_parent" 
    ohos:background_element="#f4f5f7" 
    ohos:left_padding="15vp" 
    ohos:right_padding="15vp" 
    ohos:top_padding="10vp" 
    ohos:bottom_padding="10vp"> 
 
    <Text 
      ohos:height="match_content" 
      ohos:width="match_content" 
      ohos:text="温度：" 
      ohos:text_color="#000000" 
      ohos:text_size="18fp" 
      ohos:vertical_center="true"/> 
 
    <Text 
      ohos:id="$+id:text_temp" 
      ohos:height="match_content" 
      ohos:width="match_content" 
      ohos:text="数据正在采集 " 
      ohos:text_color="#00ff00" 
      ohos:text_size="18fp" 
      ohos:left_margin="50vp" 
      ohos:vertical_center="true"/> 
  </DependentLayout> 
 
  <Component 
    ohos:height="2vp" 
    ohos:width="match_content" 
    ohos:background_element="#FFFFFF"/> 
 
  <DependentLayout 
    ohos:height="match_content" 
    ohos:width="match_parent" 
    ohos:background_element="#f4f5f7" 
    ohos:left_padding="15vp" 
    ohos:right_padding="15vp" 
    ohos:top_padding="10vp" 
    ohos:bottom_padding="10vp"> 
 
    <Text 
      ohos:height="match_content" 
      ohos:width="match_content" 
      ohos:text="湿度：" 
      ohos:text_color="#000000" 
      ohos:text_size="18fp" 
      ohos:vertical_center="true"/> 
 
    <Text 
      ohos:id="$+id:text_humi" 
      ohos:height="match_content" 
      ohos:width="match_content" 
      ohos:text="数据正在采集 " 
      ohos:text_color="#00ff00" 
      ohos:text_size="18fp" 
      ohos:left_margin="50vp" 
      ohos:vertical_center="true"/> 
  </DependentLayout> 
 
  <Component 
    ohos:height="2vp" 
    ohos:width="match_content" 
    ohos:background_element="#FFFFFF"/> 
 
  <DependentLayout 
    ohos:height="match_content" 
    ohos:width="match_parent" 
    ohos:background_element="#f4f5f7" 
    ohos:left_padding="15vp" 
    ohos:right_padding="15vp" 
    ohos:top_padding="10vp" 
    ohos:bottom_padding="10vp"> 
 
    <Text 
      ohos:height="match_content" 
      ohos:width="match_content" 
      ohos:text="CO2：" 
      ohos:text_color="#000000" 
      ohos:text_size="18fp" 
      ohos:vertical_center="true"/> 
 
    <Text 
      ohos:id="$+id:text_co2" 
      ohos:height="match_content" 
      ohos:width="match_content" 
      ohos:text="数据正在采集 " 
      ohos:text_color="#00ff00" 
      ohos:text_size="18fp" 
      ohos:left_margin="50vp" 
      ohos:vertical_center="true"/> 
  </DependentLayout> 
 
 
</DirectionalLayout>

12. dialog_device_item.xml

<?xml version="1.0" encoding="utf-8"?> 
<DirectionalLayout 
    xmlns:ohos="http://schemas.huawei.com/res/ohos" 
    ohos:height="70vp" 
    ohos:width="match_parent" 
    ohos:orientation="horizontal"> 
 
    <Image 
        ohos:id="$+id:item_type" 
        ohos:height="45vp" 
        ohos:width="50vp" 
        ohos:image_src="$media:dv_phone" 
        ohos:layout_alignment="vertical_center" 
        ohos:left_margin="10vp" 
        ohos:scale_mode="inside"/> 
 
    <Text 
        ohos:id="$+id:item_name" 
        ohos:height="match_parent" 
        ohos:width="0vp" 
        ohos:max_text_lines="1" 
        ohos:text="Huawei P40" 
        ohos:text_alignment="vertical_center" 
        ohos:text_size="15fp" 
        ohos:weight="1"/> 
 
    <Image 
        ohos:id="$+id:item_check" 
        ohos:height="30vp" 
        ohos:width="30vp" 
        ohos:image_src="$media:uncheck2"

<DirectionalLayout 
    xmlns:ohos="http://schemas.huawei.com/res/ohos" 
    ohos:height="340vp" 
    ohos:width="match_parent" 
    ohos:orientation="vertical"> 
 
    <DirectionalLayout 
        ohos:height="match_parent" 
        ohos:width="match_parent" 
        ohos:background_element="$graphic:background_white_radius_10" 
        ohos:bottom_margin="50vp" 
        ohos:left_margin="20vp" 
        ohos:orientation="vertical" 
        ohos:right_margin="20vp"> 
 
        <Text 
            ohos:height="50vp" 
            ohos:width="match_parent" 
            ohos:left_padding="20vp" 
            ohos:text="迁移到其他设备" 
            ohos:text_alignment="vertical_center" 
            ohos:text_color="#000000" 
            ohos:text_size="16fp"/> 
 
        <ListContainer 
            ohos:id="$+id:list_container_device" 
            ohos:height="0vp" 
            ohos:width="match_parent" 
            ohos:weight="1"/> 
 
        <DirectionalLayout 
            ohos:height="50vp" 
            ohos:width="match_parent" 
            ohos:orientation="horizontal"> 
 
            <Text 
                ohos:id="$+id:operate_no" 
                ohos:height="match_parent" 
                ohos:width="0vp" 
                ohos:text="取消" 
                ohos:text_alignment="center" 
                ohos:text_color="#1e90ff" 
                ohos:text_size="17fp" 
                ohos:weight="1"/> 
 
            <Component 
                ohos:height="25vp" 
                ohos:width="1vp" 
                ohos:background_element="#cccccc" 
                ohos:layout_alignment="vertical_center"/> 
 
            <Text 
                ohos:id="$+id:operate_yes" 
                ohos:height="match_parent" 
                ohos:width="0vp" 
                ohos:text="确定" 
                ohos:text_alignment="center" 
                ohos:text_color="#1e90ff" 
                ohos:text_size="17fp" 
                ohos:weight="1"/> 
        </DirectionalLayout> 
    </DirectionalLayout> 
</DirectionalLayout>

14. toast_dialog.xml

<DirectionalLayout 
    xmlns:ohos="http://schemas.huawei.com/res/ohos" 
    ohos:height="match_content" 
    ohos:width="match_content" 
    ohos:orientation="vertical" 
    ohos:background_element="$graphic:background_gray_circle"> 
    <Text 
        ohos:id="$+id:toast" 
        ohos:height="match_content" 
        ohos:width="match_content" 
        ohos:left_padding="16vp" 
        ohos:right_padding="16vp" 
        ohos:top_padding="4vp" 
        ohos:bottom_padding="4vp" 
        ohos:layout_alignment="center" 
        ohos:text_size="20fp"/> 
</DirectionalLayout>

TV端

1. TVAbilitySlice

  private Text tvTemp; 
    private Text tvTempMax; 
    private Text tvTempMin; 
 
    private Text tvHumi; 
    private Text tvHumiMax; 
    private Text tvHumiMin; 
 
    private Text tvCgas; 
    private Text tvCgasMax; 
    private Text tvCgasMin; 
 
    private Text tvTempStatus; 
    private Text tvHumiStatus; 
    private Text tvCgasStatus; 
 
 
    private ProgressBar rgbTem; 
    private ProgressBar rgbHumi; 
    private ProgressBar rgbCgas; 
 
    private static final HiLogLabel label = new HiLogLabel(HiLog.LOG_APP, 0x0001, "my_log"); 
 
    private double temp; 
    private double humi; 
    private double cGas; 
    private SingleKvStore singleKvStore; 
    private KvStoreObserverClient kvStoreObserverClient; 
 
    @Override 
    public void onStart(Intent intent) { 
        super.onStart(intent); 
        super.setUIContent(ResourceTable.Layout_ability_tv); 
        //设置沉浸式状态栏 
        getWindow().addFlags(WindowManager.LayoutConfig.MARK_TRANSLUCENT_STATUS); 
 
        tvTemp = (Text) findComponentById(ResourceTable.Id_tvTemp); 
        tvTempMax = (Text) findComponentById(ResourceTable.Id_tvMaxTemp); 
        tvTempMin = (Text) findComponentById(ResourceTable.Id_tvMinTemp); 
        rgbTem = (RoundProgressBar) findComponentById(ResourceTable.Id_rgb_tem); 
 
        tvHumi = (Text) findComponentById(ResourceTable.Id_tvHumi); 
        tvHumiMax = (Text) findComponentById(ResourceTable.Id_tvMaxHumi); 
        tvHumiMin = (Text) findComponentById(ResourceTable.Id_tvMinHumi); 
        rgbHumi = (RoundProgressBar) findComponentById(ResourceTable.Id_rgb_humi); 
 
        tvCgas = (Text) findComponentById(ResourceTable.Id_tvCgas); 
        tvCgasMax = (Text) findComponentById(ResourceTable.Id_tvMaxCgas); 
        tvCgasMin = (Text) findComponentById(ResourceTable.Id_tvMinCgas); 
        rgbCgas = (RoundProgressBar) findComponentById(ResourceTable.Id_rgb_gas); 
 
        tvTempStatus = (Text) findComponentById(ResourceTable.Id_tvTempStatus); 
        tvHumiStatus = (Text) findComponentById(ResourceTable.Id_tvHumiStatus); 
        tvCgasStatus = (Text) findComponentById(ResourceTable.Id_tvCgasStatus); 
 
        try { 
            KvManagerConfig config = new KvManagerConfig(getContext()); 
            KvManager kvManager = KvManagerFactory.getInstance().createKvManager(config); 
            Options CREATE = new Options(); 
            CREATE.setCreateIfMissing(true).setEncrypt(false) 
                .setKvStoreType(KvStoreType.SINGLE_VERSION) 
                .setAutoSync(true); 
            singleKvStore = kvManager.getKvStore(CREATE, DBUtils.KV_STORE_NAME); 
            kvStoreObserverClient = new KvStoreObserverClient(); 
            singleKvStore.subscribe(SubscribeType.SUBSCRIBE_TYPE_ALL, kvStoreObserverClient); 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
 
    } 
 
    private class KvStoreObserverClient implements KvStoreObserver { 
 
        @Override 
        public void onChange(ChangeNotification notification) { 
            //onChange方法实质上，在一个子线程里执行 
            getUITaskDispatcher().asyncDispatch(() -> { 
                //在这里执行页面ui组件的显示刷新 
                asyncUpdateData(); 
            }); 
        } 
    } 
 
 
    public void asyncUpdateData(){ 
        //查询分布式数据的数据 
        List<Entry> entries = singleKvStore.getEntries("data"); 
        if (entries.size() > 0) { 
            ZSONObject zsonObject = ZSONObject.stringToZSON(entries.get(0).getValue().getString()); 
            double temp = zsonObject.getDouble("temp"); 
            double humi = zsonObject.getDouble("humi"); 
            double co2 = zsonObject.getDouble("co2"); 
            String strTemp = String.format("%.1f", temp); 
            String strHumi = String.format("%.1f", humi); 
            String strCO2 = String.format("%.1f", co2); 
            initView(strTemp,strHumi,strCO2); 
 
        } 
    } 
 
    private void initView(String strTemp,String strHumi,String strCO2) { 
        temp = Double.valueOf(strTemp); 
        int tempMax = 45; 
        int tempMin = -10; 
 
        humi = Double.valueOf(strHumi); 
        int humiMax = 70; 
        int humiMin = 10; 
 
        cGas = Double.valueOf(strCO2); 
        int cGasMax = 1000; 
 
        if (temp > -100) { 
            if (temp > tempMax || temp < tempMin) { 
                tvTemp.setTextColor(Color.RED); 
                tvTempStatus.setText("异常"); 
                tvTempStatus.setTextColor(Color.RED); 
                rgbTem.setProgressColor(Color.RED); 
            } else { 
                tvTemp.setTextColor(Color.GREEN); 
                tvTempStatus.setText("正常"); 
                tvTempStatus.setTextColor(Color.GREEN); 
                rgbTem.setProgressColor(Color.GREEN); 
 
            } 
        } else { 
            tvTemp.setTextColor(Color.BLACK); 
            tvTempStatus.setTextColor(Color.BLACK); 
            tvTempStatus.setText("未知"); 
            rgbTem.setProgressColor(Color.GREEN); 
 
        } 
        tvTempMax.setText(tempMax + "℃"); 
        tvTempMin.setText(tempMin + "℃"); 
 
        if (humi > -100) { 
            if (humi > humiMax || humi < humiMin) { 
                tvHumi.setTextColor(Color.RED); 
                tvHumiStatus.setText("异常"); 
                tvHumiStatus.setTextColor(Color.RED); 
                rgbHumi.setProgressColor(Color.RED); 
            } else { 
                tvHumi.setTextColor(Color.GREEN); 
                tvHumiStatus.setText("正常"); 
                tvHumiStatus.setTextColor(Color.GREEN); 
                rgbHumi.setProgressColor(Color.GREEN); 
            } 
        } else { 
            tvHumi.setTextColor(Color.BLACK); 
            tvHumiStatus.setText("未知"); 
            tvHumiStatus.setTextColor(Color.BLACK); 
            rgbHumi.setProgressColor(Color.GREEN); 
 
        } 
        tvHumiMax.setText(humiMax + "% RH"); 
        tvHumiMin.setText(humiMin + "% RH"); 
 
        if (cGas > -100) { 
            if (cGas > cGasMax) { 
                tvCgas.setTextColor(Color.RED); 
                tvCgasStatus.setText("异常"); 
                tvCgasStatus.setTextColor(Color.RED); 
                rgbCgas.setProgressColor(Color.RED); 
            } else { 
                tvCgas.setTextColor(Color.GREEN); 
                tvCgasStatus.setText("正常"); 
                tvCgasStatus.setTextColor(Color.GREEN); 
            } 
        } else { 
            tvCgas.setTextColor(Color.BLACK); 
            tvCgasStatus.setText("未知"); 
            tvCgasStatus.setTextColor(Color.BLACK); 
            rgbCgas.setProgressColor(Color.GREEN); 
 
        } 
 
        tvCgasMax.setText(cGasMax + " ppm"); 
 
        tvCgasMin.setText(0 + " ppm"); 
 
        if (temp <= -100) { 
            tvTemp.setText("未知"); 
            rgbTem.setProgressValue(0); 
        } else { 
            tvTemp.setText(temp + "℃"); 
            rgbTem.setProgressValue((int) temp); 
        } 
        if (humi <= -100) { 
            tvHumi.setText("未知"); 
            rgbHumi.setProgressValue(0); 
        } else { 
            tvHumi.setText(humi + "% RH"); 
            rgbHumi.setProgressValue((int) humi); 
        } 
        if (cGas <= -100) { 
            tvCgas.setText("未知"); 
            rgbCgas.setProgressValue(0); 
        } else { 
            tvCgas.setText(cGas + " ppm"); 
            rgbCgas.setProgressValue((int) cGas); 
        } 
 
    } 
 
 
    @Override 
    protected void onStop() { 
        super.onStop(); 
        //解除订阅 
//        if (singleKvStore != null) { 
//            if(kvStoreObserverClient!=null){ 
//                singleKvStore.unSubscribe(kvStoreObserverClient); 
//            } 
//        } 
    } 
}

2. TVAbility

public class TVAbility extends Ability { 
 
  @Override 
  public void onStart(Intent intent) { 
    super.onStart(intent); 
    super.setMainRoute(TVAbilitySlice.class.getName()); 
    //实现Ability的代码中显式声明需要使用多设备协同访问的权限 
    requestPermissionsFromUser(new String[]{"ohos.permission.DISTRIBUTED_DATASYNC",}, 0); 
  } 
}

3. ability_tv.xml

<?xml version="1.0" encoding="utf-8"?> 
<DirectionalLayout 
  xmlns:ohos="http://schemas.huawei.com/res/ohos" 
  ohos:height="match_parent" 
  ohos:width="match_parent" 
  ohos:orientation="vertical" 
  ohos:background_element="$media:haibao"> 
 
  <Text 
    ohos:height="match_content" 
    ohos:width="match_content" 
    ohos:text="大棚数据监测" 
    ohos:text_color="#ffffff" 
    ohos:text_size="26vp" 
    ohos:layout_alignment="center" 
    ohos:top_margin="50vp"/> 
 
  <DependentLayout 
    ohos:height="match_parent" 
    ohos:width="match_parent"> 
 
    <DirectionalLayout 
      ohos:height="match_content" 
      ohos:width="match_parent" 
      ohos:left_padding="10vp" 
      ohos:right_padding="10vp" 
      ohos:center_in_parent="true" 
      ohos:orientation="horizontal"> 
      <DirectionalLayout 
        ohos:height="match_content" 
        ohos:width="0" 
        ohos:weight="1" 
        ohos:layout_alignment="center" 
        ohos:orientation="vertical"> 
        <Text 
          ohos:height="match_content" 
          ohos:width="match_content" 
          ohos:text="温度数据" 
          ohos:text_size="20vp" 
          ohos:padding="5vp" 
          ohos:text_color="#ffffff" 
          ohos:layout_alignment="center"/> 
        <DirectionalLayout 
          ohos:height="3vp" 
          ohos:width="match_parent" 
          ohos:background_element="#ffffff" 
          ohos:top_margin="15vp" 
          ohos:left_margin="20vp" 
          ohos:right_margin="20vp" 
          ohos:layout_alignment="center" 
          ohos:bottom_margin="15vp" 
          ohos:visibility="invisible"/> 
        <DirectionalLayout 
          ohos:height="match_content" 
          ohos:width="match_content" 
          ohos:layout_alignment="center" 
          ohos:orientation="horizontal"> 
          <DirectionalLayout 
            ohos:height="match_parent" 
            ohos:width="match_content" 
            ohos:orientation="vertical"> 
            <Text 
              ohos:height="0" 
              ohos:width="match_content" 
              ohos:text="最高温度阀值：" 
              ohos:text_size="16vp" 
              ohos:weight="1" 
              ohos:text_color="#000000"/> 
            <Text 
              ohos:height="0" 
              ohos:width="match_content" 
              ohos:text="当前温度：" 
              ohos:text_size="16vp" 
              ohos:weight="1" 
              ohos:text_color="#000000"/> 
            <Text 
              ohos:height="0" 
              ohos:width="match_content" 
              ohos:text="最低温度阀值：" 
              ohos:text_size="16vp" 
              ohos:weight="1" 
              ohos:text_color="#000000"/> 
          </DirectionalLayout> 
 
          <DependentLayout 
            ohos:height="100vp" 
            ohos:width="100vp"> 
            <RoundProgressBar 
              ohos:id="$+id:rgb_tem" 
              ohos:height="match_parent" 
              ohos:width="match_parent" 
              ohos:progress_width="10vp" 
              ohos:progress="0" 
              ohos:max="100" 
              ohos:start_angle="215" 
              ohos:max_angle="290" 
              ohos:progress_color="#00ff00" 
              ohos:center_in_parent="true"/> 
            <Text 
              ohos:id="$+id:tvMaxTemp" 
              ohos:height="match_content" 
              ohos:width="match_content" 
              ohos:text_size="15vp" 
              ohos:text_color="#000000" 
              ohos:align_parent_top="true" 
              ohos:text="未知" 
              ohos:top_margin="8vp" 
              ohos:horizontal_center="true"/> 
            <Text 
              ohos:id="$+id:tvTemp" 
              ohos:height="match_content" 
              ohos:width="match_content" 
              ohos:text_size="15vp" 
              ohos:text_color="#000000" 
              ohos:text="未知" 
              ohos:center_in_parent="true"/> 
            <Text 
              ohos:id="$+id:tvMinTemp" 
              ohos:height="match_content" 
              ohos:width="match_content" 
              ohos:text_size="14vp" 
              ohos:text_color="#000000" 
              ohos:text="未知" 
              ohos:bottom_margin="8vp" 
              ohos:align_parent_bottom="true" 
              ohos:horizontal_center="true"/> 
          </DependentLayout> 
 
        </DirectionalLayout> 
 
 
        <DirectionalLayout 
          ohos:height="3vp" 
          ohos:width="match_parent" 
          ohos:background_element="#ffffff" 
          ohos:top_margin="15vp" 
          ohos:left_margin="20vp" 
          ohos:right_margin="20vp" 
          ohos:layout_alignment="center" 
          ohos:bottom_margin="15vp" 
          ohos:visibility="invisible"/> 
        <DirectionalLayout 
          ohos:height="match_content" 
          ohos:width="match_content" 
          ohos:layout_alignment="center" 
          ohos:orientation="horizontal"> 
          <Text 
            ohos:height="match_content" 
            ohos:width="match_content" 
            ohos:text="温度状态：" 
            ohos:text_size="18vp" 
            ohos:text_color="#000000"/> 
          <Text 
            ohos:id="$+id:tvTempStatus" 
            ohos:height="match_content" 
            ohos:width="match_content" 
            ohos:text="未知" 
            ohos:text_size="18vp" 
            ohos:text_color="#000000"/> 
        </DirectionalLayout> 
      </DirectionalLayout> 
 
 
      <DirectionalLayout 
        ohos:height="90vp" 
        ohos:width="1vp" 
        ohos:background_element="#000000" 
        ohos:top_margin="6vp" 
        ohos:layout_alignment="center"/> 
 
      <DirectionalLayout 
        ohos:height="match_content" 
        ohos:width="0" 
        ohos:weight="1" 
        ohos:layout_alignment="center" 
        ohos:orientation="vertical"> 
        <Text 
          ohos:height="match_content" 
          ohos:width="match_content" 
          ohos:text="湿度数据" 
          ohos:text_size="20vp" 
          ohos:padding="5vp" 
          ohos:text_color="#ffffff" 
          ohos:layout_alignment="center"/> 
        <DirectionalLayout 
          ohos:height="3vp" 
          ohos:width="match_parent" 
          ohos:background_element="#ffffff" 
          ohos:top_margin="15vp" 
          ohos:left_margin="20vp" 
          ohos:right_margin="20vp" 
          ohos:layout_alignment="center" 
          ohos:bottom_margin="15vp" 
          ohos:visibility="invisible"/> 
 
 
        <DirectionalLayout 
          ohos:height="match_content" 
          ohos:width="match_content" 
          ohos:layout_alignment="center" 
          ohos:orientation="horizontal"> 
          <DirectionalLayout 
            ohos:height="match_parent" 
            ohos:width="match_content" 
            ohos:orientation="vertical"> 
            <Text 
              ohos:height="0" 
              ohos:width="match_content" 
              ohos:text="最大湿度阀值：" 
              ohos:text_size="16vp" 
              ohos:weight="1" 
              ohos:text_color="#000000"/> 
            <Text 
              ohos:height="0" 
              ohos:width="match_content" 
              ohos:text="当前湿度：" 
              ohos:text_size="16vp" 
              ohos:weight="1" 
              ohos:text_color="#000000"/> 
            <Text 
              ohos:height="0" 
              ohos:width="match_content" 
              ohos:text="最小湿度阀值：" 
              ohos:text_size="16vp" 
              ohos:weight="1" 
              ohos:text_color="#000000"/> 
          </DirectionalLayout> 
 
          <DependentLayout 
            ohos:height="100vp" 
            ohos:width="100vp"> 
            <RoundProgressBar 
              ohos:id="$+id:rgb_humi" 
              ohos:height="match_parent" 
              ohos:width="match_parent" 
              ohos:progress_width="10vp" 
              ohos:progress="0" 
              ohos:max="100" 
              ohos:start_angle="215" 
              ohos:max_angle="290" 
              ohos:progress_color="#00ff00" 
              ohos:center_in_parent="true"/> 
            <Text 
              ohos:id="$+id:tvMaxHumi" 
              ohos:height="match_content" 
              ohos:width="match_content" 
              ohos:text_size="15vp" 
              ohos:text_color="#000000" 
              ohos:text="未知" 
              ohos:top_margin="8vp" 
              ohos:horizontal_center="true" 
              ohos:align_parent_top="true"/> 
            <Text 
              ohos:id="$+id:tvHumi" 
              ohos:height="match_content" 
              ohos:width="match_content" 
              ohos:text_size="15vp" 
              ohos:text_color="#000000" 
              ohos:text="未知" 
              ohos:center_in_parent="true"/> 
            <Text 
              ohos:id="$+id:tvMinHumi" 
              ohos:height="match_content" 
              ohos:width="match_content" 
              ohos:text_size="15vp" 
              ohos:text_color="#000000" 
              ohos:horizontal_center="true" 
              ohos:text="未知" 
              ohos:bottom_margin="8vp" 
              ohos:align_parent_bottom="true"/> 
          </DependentLayout> 
 
        </DirectionalLayout> 
 
        <DirectionalLayout 
          ohos:height="3vp" 
          ohos:width="match_parent" 
          ohos:background_element="#ffffff" 
          ohos:top_margin="15vp" 
          ohos:left_margin="20vp" 
          ohos:right_margin="20vp" 
          ohos:layout_alignment="center" 
          ohos:bottom_margin="15vp" 
          ohos:visibility="invisible"/> 
        <DirectionalLayout 
          ohos:height="match_content" 
          ohos:width="match_content" 
          ohos:layout_alignment="center" 
          ohos:orientation="horizontal"> 
          <Text 
            ohos:height="match_content" 
            ohos:width="match_content" 
            ohos:text="湿度状态：" 
            ohos:text_size="18vp" 
            ohos:text_color="#000000"/> 
          <Text 
            ohos:id="$+id:tvHumiStatus" 
            ohos:height="match_content" 
            ohos:width="match_content" 
            ohos:text="未知" 
            ohos:text_size="18vp" 
            ohos:text_color="#000000"/> 
        </DirectionalLayout> 
 
      </DirectionalLayout> 
 
 
 
      <DirectionalLayout 
        ohos:height="90vp" 
        ohos:width="1vp" 
        ohos:background_element="#000000" 
        ohos:top_margin="6vp" 
        ohos:layout_alignment="center"/> 
 
 
 
 
      <DirectionalLayout 
        ohos:height="match_content" 
        ohos:width="0" 
        ohos:weight="1" 
        ohos:layout_alignment="center" 
        ohos:orientation="vertical"> 
        <Text 
          ohos:height="match_content" 
          ohos:width="match_content" 
          ohos:text="CO2数据" 
          ohos:text_size="20vp" 
          ohos:padding="5vp" 
          ohos:text_color="#ffffff" 
          ohos:layout_alignment="center"/> 
        <DirectionalLayout 
          ohos:height="3vp" 
          ohos:width="match_parent" 
          ohos:background_element="#ffffff" 
          ohos:top_margin="15vp" 
          ohos:left_margin="20vp" 
          ohos:right_margin="20vp" 
          ohos:layout_alignment="center" 
          ohos:bottom_margin="15vp" 
          ohos:visibility="invisible"/> 
        <DirectionalLayout 
          ohos:height="match_content" 
          ohos:width="match_content" 
          ohos:layout_alignment="center" 
          ohos:orientation="horizontal"> 
          <DirectionalLayout 
            ohos:height="match_parent" 
            ohos:width="match_content" 
            ohos:orientation="vertical"> 
            <Text 
              ohos:height="0" 
              ohos:width="match_content" 
              ohos:text="最大气体增量：" 
              ohos:text_size="16vp" 
              ohos:weight="1" 
              ohos:text_color="#000000"/> 
            <Text 
              ohos:height="0" 
              ohos:width="match_content" 
              ohos:text="当前增量：" 
              ohos:text_size="16vp" 
              ohos:weight="1" 
              ohos:text_color="#000000"/> 
            <Text 
              ohos:height="0" 
              ohos:width="match_content" 
              ohos:text="最小气体增量：" 
              ohos:text_size="16vp" 
              ohos:weight="1" 
              ohos:text_color="#000000"/> 
          </DirectionalLayout> 
 
          <DependentLayout 
            ohos:height="100vp" 
            ohos:width="100vp"> 
            <RoundProgressBar 
              ohos:id="$+id:rgb_gas" 
              ohos:height="match_parent" 
              ohos:width="match_parent" 
              ohos:progress_width="10vp" 
              ohos:progress="0" 
              ohos:max="1000" 
              ohos:start_angle="215" 
              ohos:max_angle="290" 
              ohos:progress_color="#00ff00" 
              ohos:center_in_parent="true"/> 
            <Text 
              ohos:id="$+id:tvMaxCgas" 
              ohos:height="match_content" 
              ohos:width="match_content" 
              ohos:text_size="15vp" 
              ohos:text="未知" 
              ohos:text_color="#000000" 
              ohos:top_margin="8vp" 
              ohos:horizontal_center="true" 
              ohos:align_parent_top="true"/> 
            <Text 
              ohos:id="$+id:tvCgas" 
              ohos:height="match_content" 
              ohos:width="match_content" 
              ohos:text_size="15vp" 
              ohos:text="未知" 
              ohos:text_color="#000000" 
              ohos:center_in_parent="true"/> 
            <Text 
              ohos:id="$+id:tvMinCgas" 
              ohos:height="match_content" 
              ohos:width="match_content" 
              ohos:text_size="15vp" 
              ohos:text="未知" 
              ohos:text_color="#000000" 
              ohos:bottom_margin="8vp" 
              ohos:horizontal_center="true" 
              ohos:align_parent_bottom="true"/> 
          </DependentLayout> 
        </DirectionalLayout> 
 
        <DirectionalLayout 
          ohos:height="3vp" 
          ohos:width="match_parent" 
          ohos:background_element="#ffffff" 
          ohos:top_margin="15vp" 
          ohos:left_margin="20vp" 
          ohos:right_margin="20vp" 
          ohos:layout_alignment="center" 
          ohos:bottom_margin="15vp" 
          ohos:visibility="invisible"/> 
 
 
        <DirectionalLayout 
          ohos:height="match_content" 
          ohos:width="match_content" 
          ohos:layout_alignment="center" 
          ohos:orientation="horizontal"> 
          <Text 
            ohos:height="match_content" 
            ohos:width="match_content" 
            ohos:text="气体状态：" 
            ohos:text_size="18vp" 
            ohos:text_color="#000000"/> 
          <Text 
            ohos:id="$+id:tvCgasStatus" 
            ohos:height="match_content" 
            ohos:width="match_content" 
            ohos:text="未知" 
            ohos:text_size="18vp" 
            ohos:text_color="#000000"/> 
        </DirectionalLayout> 
      </DirectionalLayout> 
    </DirectionalLayout> 
  </DependentLayout> 
 
</DirectionalLayout>

4.config.json

{ 
  "app": { 
    "bundleName": "com.isoftstone. distributeddata ", 
    "vendor": "isoftstone", 
    "version": { 
      "code": 1000000, 
      "name": "1.0.0" 
    } 
  }, 
  "deviceConfig": {}, 
  "module": { 
    "package": "com.isoftstone.distributeddata", 
    "name": ".MyApplication", 
    "mainAbility": "com.isoftstone.distributeddata.com.isoftstone.distributeddata.TVAbility", 
    "deviceType": [ 
      "phone" 
    ], 
    "distro": { 
      "deliveryWithInstall": true, 
      "moduleName": "entry", 
      "moduleType": "entry", 
      "installationFree": false 
    }, 
    "reqPermissions": [ 
      { 
        "name": "ohos.permission.DISTRIBUTED_DATASYNC" 
      } 
    ], 
    "abilities": [ 
      { 
        "skills": [ 
          { 
            "entities": [ 
              "entity.system.home" 
            ], 
            "actions": [ 
              "action.system.home" 
            ] 
          } 
        ], 
        "orientation": "landscape", 
        "name": "com.isoftstone.distributeddata.TVAbility", 
        "icon": "$media:icon", 
        "description": "$string:tvability_description", 
        "label": "$string:entry_TVAbility", 
        "type": "page", 
        "launchType": "standard" 
      } 
    ], 
    "metaData": { 
      "customizeData": [ 
        { 
          "name": "hwc-theme", 
          "value": "androidhwext:style/Theme.Emui.NoTitleBar", 
          "extra": "" 
        } 
      ] 
    } 
  } 
}

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HarmonyOS分布式应用农业大棚数据监测解读

[[440298]] 想了解更多内容，请访问： 51CTO和华为官方合作共建的鸿蒙技术社区 https://harmonyos.51cto.co

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