获取可信设备,设备与周边设备建立可信关系后，通过设备信息查询接口可以获取所有上线并且可信的设备。

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.example.test_240220184822040") 
              this.myDeviceId = this.dmInstance.getLocalDeviceId() 
              this.dmInstance.on('discoverSuccess', (data) => { 
 
                console.log('testTag - discoverSuccess on:' + JSON.stringify(data)) 
 
                //若deviceId等于目标id，则与该设备绑定信任关系   181cfec6c9e18c41  f7c2338a316948a5 
                if (data.device.deviceId == "f7c2338a316948a5") { 
                  //绑定信任设备所需options，即绑定的验证方式，本例为pin码方式验证 
                  let bindParam: Record<string, string | number> = { 
                    'bindType': 1, // 认证类型： 1 - 无帐号PIN码认证 
                  }; 
 
                  //回调数据对象，绑定成功后回调的对象封装 
                  class Data { 
                    deviceId: string = ''; 
                  } 
 
                  //绑定信任关系所用接口 
                  this.dmInstance!.bindTarget(data.device.deviceId, bindParam, (_err: BusinessError, data: Data) => { 
                    console.info('testTag - bindTarget result:' + JSON.stringify(data)); 
                  }) 
                } 
                hilog.info(0x0000, 'testTag', '%{public}s', JSON.stringify(data)); 
              }); 
            } catch (err) { 
              let e: BusinessError = err as BusinessError; 
              console.error('testTag - createDeviceManager errCode:' + e.code + ',errMessage:' + e.message); 
            } 
          }) 
 
 
        Text("myDeviceId - " + this.myDeviceId) 
          .id('message') 
          .textAlign(TextAlign.Center) 
          .width('100%') 
          .fontSize(15) 
          .copyOption(CopyOptions.LocalDevice) 
          .size({ width: '95%', height: '75%' }) 
          .border({ width: 1, radius: 20, color: Color.Black }) 
          .padding(10) 
          .margin({ top: 16 }) 
 
 
 
        Button("startDiscover").onClick(() => { 
          let discoverParam: Record<string, number> = { 
            'discoverTargetType': 1 
          }; 
          let filterOptions: Record<string, number> = { 
            'availableStatus': 0 
          }; 
          try { 
            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(() => { 
          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("getAvailableDeviceList").onClick(() =>{ 
          try { 
            let deviceInfoList: Array<deviceManager.DeviceBasicInfo> = this.dmInstance!.getAvailableDeviceListSync(); 
            console.log("testTag - deviceInfoList: " + JSON.stringify(deviceInfoList)) 
          } catch (err) { 
            let e: BusinessError = err as BusinessError; 
            console.error('testTag - getAvailableDeviceListSync errCode:' + e.code + ',errMessage:' + e.message); 
          } 
 
        })