鸿蒙开发实战：Intents Kit 实现智能文档流转

在办公自动化场景中，我们通过 Intents Kit 构建跨应用文档处理流水线，核心实现代码如下：

typescript

// 1. 文档打开意图处理

const docIntent = new intent.IntentBuilder()

  .setAction(intent.Action.VIEW)

  .setUri('file://contract.docx')

  .setType('application/msword')

  .setFlags(

    intent.Flag.FLAG_AUTH_READABLE |

    intent.Flag.FLAG_GRANT_PERSISTABLE_URI_PERMISSION

  )

  .build()

// 2. 跨应用文档处理链

async function processDocumentPipeline() {

  // 发送至电子签章应用

  const signResult = await intent.startAbilityForResult({

    bundleName: 'com.example.esign',

    abilityName: 'SignAbility',

    intent: new intent.IntentBuilder()

      .withData(this.docUri)

      .setParam('signType', 'COMPANY_SEAL')

      .build()

  })

  // 转至云存储备份

  await intent.startAbility({

    action: intent.Action.SEND,

    entities: [intent.Entity.CLOUD],

    uriList: [signResult.uri],

    parameters: {

      'backupPolicy': 'AUTO_VERSIONING'

    }

  })

  // 触发审批流程

  intent.startBackgroundAbility({

    bundleName: 'com.example.approval',

    abilityName: 'ApprovalWorkflow',

    intent: new intent.IntentBuilder()

      .setParam('docTitle', this.docName)

      .setParam('urgentLevel', 2)

      .build()

  })

}

// 3. 动态意图解析

const intentResolver = new intent.IntentResolver({

  preferredApps: [

    { package: 'com.huawei.office', rank: 10 },

    { package: 'com.example.pdfeditor', rank: 5 }

  ],

  fallbackHandler: (unresolvedIntent) => {

    this.showAppPickerDialog(unresolvedIntent)

  }

})

// 4. 安全传输控制

const secureIntent = intent.createSecureIntent({

  baseIntent: docIntent,

  securityPolicy: {

    encryption: intent.EncryptionType.HW_DRM,

    accessControl: {

      maxAccessCount: 3,

      validDuration: 3600 // 1小时有效期

    }

  }

})

// 5. 结果回调处理

intent.setResultHandler({

  onComplete: (result) => {

    this.updateDocumentStatus(result.data.uri)

  },

  onError: (error) => {

    this.showErrorToast(error.message)

  }

})

//关键技术实现：

//意图优先级管理：

typescript

intent.setPriorityPolicy({

  foregroundRequest: intent.Priority.IMMEDIATE,

  backgroundRequest: intent.Priority.BALANCED,

  batterySaverMode: intent.Priority.DEFERRED

})

//文档操作审计：

typescript

intent.enableAuditLogging({

  minimumLevel: intent.AuditLevel.SENSITIVE,

  customFields: ['docCategory', 'operatorId']

})

//智能路由决策：

typescript

const smartRouter = new intent.SmartRouter({

  networkAware: true,

  deviceCapabilityFilter: {

    required: ['printing', 'highResDisplay'],

    preferred: ['stylusSupport']

  }

})

//法律合规检查：

typescript

intent.addComplianceCheck({

  regulations: ['GDPR', 'CCPA'],

  onViolation: (clause) => blockIntentDelivery()

})

//工作流可视化：

typescript

const workflowGraph = intent.generateFlowChart({

  includeParams: true,

  showSecurityMarkers: true

})

//异常恢复机制：

typescript

intent.setRecoveryStrategy({

  retryPolicy: {

    maxAttempts: 3,

    backoffFactor: 2

  },

  fallbackActions: [

    { condition: 'TIME_OUT', action: this.saveToPendingQueue }

  ]

})

典型业务场景：

合同签署自动化流水线

跨部门文档审批流转

敏感文件安全共享

多应用协作编辑