添加信任设备,手机创建一个设备管理实例，获取可信设备和本地设备的相关信息，然后扫描绑定其他手机

 "requestPermissions":[ 
      { 
        "name": "ohos.permission.DISTRIBUTED_DATASYNC" 
      } 
    ],

import deviceManager from '@ohos.distributedDeviceManager'; 
import abilityAccessCtrl, { Permissions } from '@ohos.abilityAccessCtrl' 
import { common } from '@kit.AbilityKit'; 
import { router } from '@kit.ArkUI'; 
import { BusinessError } from '@kit.BasicServicesKit'; 
import { hilog } from '@kit.PerformanceAnalysisKit'; 
 
@Entry 
@Component 
struct Index { 
  @State message: string = '设备列表'; 
  @State myDeviceId: string = 'wait for data'; 
  @State flagA: boolean = true; 
  @State flagB: boolean = false; 
  dmInstance: deviceManager.DeviceManager | null = null 
 
  onPageShow(): void { 
    let checker = abilityAccessCtrl.createAtManager() 
    let context = getContext() as common.UIAbilityContext 
    const permissions: Array<Permissions> = ["ohos.permission.DISTRIBUTED_DATASYNC"]; 
    checker.requestPermissionsFromUser(context, permissions).then((data) => { 
    }) 
  } 
 
  build() { 
    Row() { 
      Column() { 
        Text("myDeviceId - " + this.myDeviceId) 
        Button("startMonitor") 
          .onClick(()=>{ 
            try { 
              //这里构造一个对象并赋值，原因是同一个包名构造的对象并不是单例的 
              this.dmInstance = deviceManager.createDeviceManager("com.javalee.application") 
              this.myDeviceId = this.dmInstance.getLocalDeviceId() 
              this.dmInstance.on('discoverSuccess', (data) => { 
                hilog.info(0x0000, 'testTag', '%{public}s', JSON.stringify(data)); 
              }); 
              // this.dmInstance.startDiscovering(discoverParam, filterOptions); 
            } catch (err) { 
              let e: BusinessError = err as BusinessError; 
              console.error('testTag - createDeviceManager errCode:' + e.code + ',errMessage:' + e.message); 
            } 
          }) 
        Button("startDiscover").onClick(() => { 
          let discoverParam: Record<string, number> = { 
            'discoverTargetType': 1 
          }; 
          let filterOptions: Record<string, number> = { 
            'availableStatus': 0 
          }; 
          try { 
            // this.dmInstance = deviceManager.createDeviceManager("com.javalee.application")//这行注掉功能正常，开启异常 
            // let myManage = deviceManager.createDeviceManager("com.javalee.application") 
            // this.myDeviceId = this.dmInstance.getLocalDeviceId() 
            // this.dmInstance.on('discoverSuccess', (data) => { 
            //   hilog.info(0x0000, 'testTag', '%{public}s', JSON.stringify(data)); 
            // }); 
            this.dmInstance!.startDiscovering(discoverParam, filterOptions); 
          } catch (err) { 
            let e: BusinessError = err as BusinessError; 
            console.error('testTag - startDiscovering errCode:' + e.code + ',errMessage:' + e.message); 
          } 
          this.flagA = false 
          this.flagB = true 
        }).enabled(this.flagA) 
        Button("stopDiscover").onClick(() => { 
          // let deviceManage = deviceManager.createDeviceManager("com.javalee.application") 
          try { 
            this.dmInstance!.stopDiscovering() 
          } catch (err) { 
            let e: BusinessError = err as BusinessError; 
            console.error('testTag - stopDiscovering errCode:' + e.code + ',errMessage:' + e.message); 
          } 
          this.flagA = true 
          this.flagB = false 
        }).enabled(this.flagB) 
 
        Button(this.message) 
          .fontSize(30) 
          .fontWeight(FontWeight.Bold) 
          .onClick(() => { 
            router.pushUrl({ url: 'pages/DeviceListPage' }); 
          }) 
      } 
      .width('100%') 
      .align(Alignment.BottomStart) 
      .height('150.00vp') 
      .alignItems(HorizontalAlign.Center) 
      .justifyContent(FlexAlign.SpaceBetween) 
    } 
    .height('100%') 
    .offset({ x: '0.00vp', y: '0.00vp' }) 
    .displayPriority(2) 
  } 
}