#鸿蒙通关秘籍#如何通过startAbility接口拉起文件处理类应用？

通过调用startAbility接口，可以实现由系统从已安装的应用中寻找符合要求的应用来打开特定文件。首先需要导入相关模块并获取应用上下文Context，然后构造请求数据，包括文件的URI和类型信息，最后调用startAbility接口启动。

javascript import { fileUri } from '@kit.CoreFileKit'; import { UIAbility, Want, common, wantConstant } from '@kit.AbilityKit'; import { BusinessError } from '@kit.BasicServiceKit';

export default class EntryAbility extends UIAbility { onWindowStageCreate(windowStage: window.WindowStage) { let filePath = this.context.filesDir + '/test.txt'; let uri = fileUri.getUriFromPath(filePath); let want = { uri: uri, type: 'text/plain', flags: wantConstant.Flags.FLAG_AUTH_WRITE_URI_PERMISSION | wantConstant.Flags.FLAG_AUTH_READ_URI_PERMISSION }; this.context.startAbility(want) .then(() => { console.info('Succeed to invoke startAbility.'); }) .catch((err: BusinessError) => { console.error(Failed to invoke startAbility, code: ${err.code}, message: ${err.message}); }); } }