HarmonyOS Next 跨设备文件管理器 原创

import { DragEvent } from '@ohos.arkui';

// 假设这是一个文件组件
FileComponent()
  .draggable(true)
  .onDragStart((event: DragEvent) => {
        // 获取文件数据，这里假设 getFileData() 是获取文件二进制数据的方法
        let fileData = getFileData();
        // 设置要传输的文件数据
        event.data.setData('application/octet-stream', fileData);
    })
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import { DropEvent } from '@ohos.arkui';
import fs from '@ohos.file.fs';

// 假设这是一个文件接收区域组件
FileDropArea()
  .onDrop((event: DropEvent) => {
        let data = event.data;
        let fileData = data.getPrimaryData();
        if (fileData) {
            // 生成文件名，这里简单示例，实际可根据需求调整
            let fileName = 'transferred_file.dat';
            // 保存文件到本地
            fs.writeFile({
                path: fileName,
                data: fileData,
                encoding: 'binary',
                success: () => {
                    console.log('文件保存成功');
                },
                fail: (err) => {
                    console.error(`文件保存失败，错误码：${err.code}，错误信息：${err.message}`);
                }
            });
        }
    })
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import pasteboard from '@ohos.pasteboard';
import { BusinessError } from '@ohos.base';

// 复制文件数据到剪贴板
export async function copyFileToClipboard(fileData: Uint8Array): Promise<void> {
    let pasteData: pasteboard.PasteData = pasteboard.createData('application/octet-stream', fileData);
    let systemPasteBoard: pasteboard.SystemPasteboard = pasteboard.getSystemPasteboard();
    await systemPasteBoard.setData(pasteData).catch((err: BusinessError) => {
        console.error(`Failed to set pastedata. Code: ${err.code}, message: ${err.message}`);
    });
}

// 从剪贴板获取文件数据
export async function getFileFromClipboard(): Promise<Uint8Array | null> {
    let systemPasteBoard: pasteboard.SystemPasteboard = pasteboard.getSystemPasteboard();
    return new Promise((resolve, reject) => {
        systemPasteBoard.getData((err: BusinessError, data: pasteboard.PasteData) => {
            if (err) {
                console.error(`Failed to get pastedata. Code: ${err.code}, message: ${err.message}`);
                resolve(null);
            } else {
                let fileData = data.getPrimaryData();
                resolve(fileData);
            }
        });
    });
}
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import { DistributedDataObject } from '@ohos.data.distributedDataObject';

// 创建分布式数据对象
let ddo = new DistributedDataObject();
// 假设 fileData 是要保存的文件数据
ddo.setData('fileData', fileData);
// 保存数据
ddo.save().then(() => {
    console.log('数据保存成功');
}).catch((err) => {
    console.error(`数据保存失败，错误码：${err.code}，错误信息：${err.message}`);
});
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import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

// 假设 fileData 是要传输的文件数据，offset 是已传输的字节数
export async function resumeFileTransfer(fileData: Uint8Array, offset: number): Promise<void> {
    let remainingData = fileData.slice(offset);
    fs.writeFile({
        path: 'transferred_file.dat',
        data: remainingData,
        encoding: 'binary',
        position: offset,
        success: () => {
            console.log('文件传输恢复成功');
        },
        fail: (err: BusinessError) => {
            console.error(`文件传输恢复失败，错误码：${err.code}，错误信息：${err.message}`);
        }
    });
}
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import abilityAccessCtrl from '@ohos.abilityAccessCtrl';
import systemPermission from '@ohos.security.systemPermission';

// 检查权限
async function checkPermission(): Promise<boolean> {
    let atManager = abilityAccessCtrl.createAtManager();
    let result = await atManager.verifyPermissionFromSelf(systemPermission.DISTRIBUTED_DATASYNC);
    return result === abilityAccessCtrl.PermissionState.PERMISSION_GRANTED;
}

// 申请权限
async function requestPermission(): Promise<boolean> {
    let atManager = abilityAccessCtrl.createAtManager();
    let result = await atManager.requestPermissionsFromUser([systemPermission.DISTRIBUTED_DATASYNC]);
    return result.authResults[0] === abilityAccessCtrl.PermissionState.PERMISSION_GRANTED;
}
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