uniapp提供了uni.chooseImage（选择图片）， uni.chooseVideo（选择视频）这两个api，但是对于打包成APP的话就没有上传文件的api了。因此我采用了plus.android中的方式来打开手机的文件管理从而上传文件。

下面是我封装的APP端选择上传图片，视频，文件的一个上传组件。

<template><view class="upload-container"><u-icon name="plus" @click="showActionSheet" size="23"></u-icon><!-- <view class="upload-list"><view class="upload-item" v-for="(item, index) in fileList" :key="index"><image v-if="item.type === 'image'" class="preview-image" :src="item.url" mode="aspectFill"@click="previewFile(item)"></image><view v-else-if="item.type === 'video'" class="preview-video" @click="previewFile(item)"><image class="video-cover" :src="item.cover || item.url" mode="aspectFill"></image><view class="video-icon"><text class="iconfont icon-play"></text></view></view><view v-else class="preview-file" @click="previewFile(item)"><text class="iconfont icon-file"></text><text class="file-name">{{ item.name }}</text></view><text class="delete-icon" @click.stop="deleteFile(index)">×</text></view><view class="upload-button" v-if="fileList.length < maxCount"@click="showActionSheet"><text class="iconfont icon-add"></text><text class="upload-text">上传{{ getUploadTypeText() }}</text></view></view> --><!-- <view class="upload-tips" v-if="tips">{{ tips }}</view> --></view>
</template><script>
export default {name: 'FileUploader',props: {// 上传文件类型：all-所有类型, image-图片, video-视频, file-文件uploadType: {type: String,default: 'all'},// 标题title: {type: String,default: '文件上传'},// 提示文字tips: {type: String,default: '支持jpg、png、mp4、doc、pdf等格式'},// 最大上传数量maxCount: {type: Number,default: 9},// 初始文件列表value: {type: Array,default: () => []},// 图片类型限制imageType: {type: Array,default: () => ['jpg', 'jpeg', 'png', 'gif']},// 视频类型限制videoType: {type: Array,default: () => ['mp4', 'mov', 'avi']},// 文件类型限制fileType: {type: Array,default: () => ['doc', 'docx', 'xls', 'xlsx', 'ppt', 'pptx', 'pdf', 'txt']},// 是否上传到服务器uploadToServer: {type: Boolean,default: true},// 上传接口地址uploadUrl: {type: String,default: ''}},data() {return {fileList: [],arrFile:[]}},created() {// 初始化文件列表if (this.value && this.value.length) {this.fileList = JSON.parse(JSON.stringify(this.value))}},watch: {value: {handler(newVal) {if (newVal && newVal.length) {this.fileList = JSON.parse(JSON.stringify(newVal))}},deep: true}},methods: {// 获取上传类型文本getUploadTypeText() {switch (this.uploadType) {case 'image':return '图片'case 'video':return '视频'case 'file':return '文件'default:return '文件'}},// 显示操作菜单showActionSheet() {let itemList = []// if (this.uploadType === 'all' || this.uploadType === 'image') {//   itemList.push('上传图片')// }// if (this.uploadType === 'all' || this.uploadType === 'video') {//   itemList.push('上传视频')// }if (this.uploadType === 'all' || this.uploadType === 'file') {// 检查平台支持// #ifdef APP-PLUSconst appPlus = plus.os.name.toLowerCase();if (appPlus === 'android' || appPlus === 'ios') {itemList.push('上传文件')}// #endif// #ifdef H5itemList.push('上传文件')// #endif// #ifdef MP-WEIXINitemList.push('上传文件')// #endif}uni.showActionSheet({itemList,success: res => {const index = res.tapIndexif (itemList[index] === '上传图片') {this.chooseImage()} else if (itemList[index] === '上传视频') {this.chooseVideo()} else if (itemList[index] === '上传文件') {this.selectAndUploadFile()}}})},// 选择图片chooseImage() {uni.chooseImage({count: this.maxCount - this.fileList.length,sizeType: ['original', 'compressed'],sourceType: ['album', 'camera'],success: res => {const tempFiles = res.tempFiles// 检查文件类型for (let i = 0; i < tempFiles.length; i++) {const file = tempFiles[i]const extension = this.getFileExtension(file.path)if (!this.imageType.includes(extension.toLowerCase())) {uni.showToast({title: `不支持${extension}格式的图片`,icon: 'none'})continue}// 添加到文件列表const fileItem = {name: this.getFileName(file.path),url: file.path,size: file.size,type: 'image',extension: extension,status: 'ready' // ready, uploading, success, fail}this.fileList.push(fileItem)// 上传到服务器if (this.uploadToServer) {this.uploadFileToServer(fileItem, this.fileList.length - 1)}}this.emitChange()}})},// 选择视频chooseVideo() {uni.chooseVideo({count: 1,sourceType: ['album', 'camera'],success: res => {const extension = this.getFileExtension(res.tempFilePath)if (!this.videoType.includes(extension.toLowerCase())) {uni.showToast({title: `不支持${extension}格式的视频`,icon: 'none'})return}// 添加到文件列表const fileItem = {name: this.getFileName(res.tempFilePath),url: res.tempFilePath,cover: '', // 视频封面，可以通过后端生成size: res.size,duration: res.duration,type: 'video',extension: extension,status: 'ready'}this.fileList.push(fileItem)// 上传到服务器if (this.uploadToServer) {this.uploadFileToServer(fileItem, this.fileList.length - 1)}this.emitChange()}})},// 选择并上传文件函数selectAndUploadFile(){// 显示加载提示uni.showLoading({title: '准备选择文件',});// 选择文件this.chooseFile().then(filePath => {// 选择文件成功后上传return this.uploadFile(filePath);}).then(result => {// 上传成功的处理uni.hideLoading();uni.showToast({title: '上传成功',icon: 'success'});console.log('上传结果:', result);// 在此处理上传成功后的业务逻辑}).catch(error => {// 错误处理uni.hideLoading();uni.showToast({title: error.message || '操作失败',icon: 'none'});console.error('文件操作错误:', error);});},// 选择文件方法chooseFile(){return new Promise((resolve, reject) => {try {// #ifdef APP-PLUSconst MediaStore = plus.android.importClass('android.provider.MediaStore');const main = plus.android.runtimeMainActivity();const Uri = plus.android.importClass('android.net.Uri');plus.io.chooseFile({title: '选择文件',filetypes: ['xlsx', 'xls', 'pdf', 'doc', 'docx'], // 允许的文件类型multiple: false, // 是否允许多选}, (event) => {if (event.files && event.files.length > 0) {const tempFilePath = decodeURIComponent(event.files[0]);console.log('选择的虚拟路径:', tempFilePath);// 解析文件IDconst uri = MediaStore.Files.getContentUri("external");// 导入contentResolverplus.android.importClass(main.getContentResolver());// 从虚拟路径中提取IDconst parts = tempFilePath.split(':');const fileId = parts[parts.length - 1];console.log('文件ID:', fileId);// 查询真实路径let cursor = main.getContentResolver().query(uri, ['_data'], "_id=?", [fileId], null);plus.android.importClass(cursor);let realPath = null;if (cursor != null && cursor.moveToFirst()) {const columnIndex = cursor.getColumnIndexOrThrow('_data');realPath = cursor.getString(columnIndex);cursor.close();}if (realPath) {// 转换为file://格式const filePath = 'file://' + realPath;console.log('文件真实路径:', filePath);resolve(filePath);} else {reject(new Error('无法获取文件路径'));}} else {reject(new Error('未选择文件'));}}, (error) => {reject(new Error('选择文件失败: ' + error.message));});// #endif// #ifdef H5// H5环境下的文件选择const input = document.createElement('input');input.type = 'file';input.accept = '.xlsx,.xls,.pdf,.doc,.docx';input.onchange = (e) => {const file = e.target.files[0];if (file) {resolve(file);} else {reject(new Error('未选择文件'));}};input.click();// #endif// #ifdef MP-WEIXIN// 微信小程序环境wx.chooseMessageFile({count: 1,type: 'file',extension: ['xlsx', 'xls', 'pdf', 'doc', 'docx'],success: (res) => {if (res.tempFiles && res.tempFiles.length > 0) {resolve(res.tempFiles[0].path);} else {reject(new Error('未选择文件'));}},fail: (err) => {reject(new Error('选择文件失败: ' + err.errMsg));}});// #endif// 其他平台// #ifdef MP-ALIPAY || MP-BAIDU || MP-TOUTIAO || MP-QQreject(new Error('当前平台不支持文件选择'));// #endif} catch (e) {reject(new Error('选择文件出错: ' + e.message));}});},// 上传文件方法uploadFile (filePath){return new Promise((resolve, reject) => {uni.showLoading({title: '上传中...',mask: true});const token = uni.getStorageSync('token');if (!token) {reject(new Error('登录状态已失效，请重新登录'));return;}// 准备表单数据const formData = {// 这里可以添加业务所需参数shangpinbianma: this.goodsDetail?.bianma || '',uploadTime: new Date().getTime()};console.log(filePath,'filepath')uni.uploadFile({url: '...', // 替换为您的服务器地址method: 'POST',name: 'file',filePath: filePath,formData: formData,header: {accept: "application/json",Authorization:"",},success: (res) => {console.log('上传响应:', res);// 检查登录状态if (res.statusCode === 200) {let result;try {// 解析返回结果if (typeof res.data === 'string') {result = JSON.parse(res.data);} else {result = res.data;}// 检查登录状态if (result.code === '-110' || result.code === '-120' || result.code === '-130' || result.code === '-150') {console.log('登录已失效');if (result.code !== '-120') {uni.showToast({title: '登录已失效',icon: 'none'});}// 跳转到登录页uni.reLaunch({url: '/pages/login/index'});reject(new Error('登录已失效'));} else if (result.success) {//此处记得修改成为你的响应判断// 上传成功resolve(result);} else {// 其他业务错误reject(new Error(result.message || '上传失败'));}} catch (e) {reject(new Error('解析上传结果失败: ' + e.message));}} else {reject(new Error('上传请求失败，状态码: ' + res.statusCode));}},fail: (err) => {reject(new Error('上传失败: ' + (err.errMsg || JSON.stringify(err))));},complete: () => {uni.hideLoading();}});});},// 获取文件扩展名getFileExtension(path) {if (!path) return ''return path.substring(path.lastIndexOf('.') + 1) || ''},// 获取文件名getFileName(path) {if (!path) return ''return path.substring(path.lastIndexOf('/') + 1) || '未命名文件'},// 触发变更事件emitChange() {this.$emit('input', this.fileList)this.$emit('change', this.fileList)}}
}
</script><style lang="scss">
.upload-container {width: 100%;padding: 20rpx;box-sizing: border-box;.upload-title {font-size: 30rpx;font-weight: bold;margin-bottom: 20rpx;}.upload-list {display: flex;flex-wrap: wrap;}.upload-item, .upload-button {position: relative;width: 200rpx;height: 200rpx;margin: 0 20rpx 20rpx 0;border-radius: 8rpx;overflow: hidden;box-sizing: border-box;}.upload-item {border: 1rpx solid #eee;.preview-image {width: 100%;height: 100%;}.preview-video {width: 100%;height: 100%;position: relative;.video-cover {width: 100%;height: 100%;}.video-icon {position: absolute;left: 50%;top: 50%;transform: translate(-50%, -50%);width: 60rpx;height: 60rpx;background-color: rgba(0, 0, 0, 0.5);border-radius: 50%;display: flex;align-items: center;justify-content: center;.icon-play {color: #fff;font-size: 30rpx;}}}.preview-file {width: 100%;height: 100%;display: flex;flex-direction: column;align-items: center;justify-content: center;background-color: #f7f7f7;.icon-file {font-size: 60rpx;color: #999;margin-bottom: 10rpx;}.file-name {font-size: 24rpx;color: #666;width: 90%;text-align: center;white-space: nowrap;overflow: hidden;text-overflow: ellipsis;}}.delete-icon {position: absolute;right: 0;top: 0;width: 40rpx;height: 40rpx;background-color: rgba(0, 0, 0, 0.5);color: #fff;font-size: 30rpx;display: flex;align-items: center;justify-content: center;z-index: 10;}}.upload-button {border: 1rpx dashed #ddd;display: flex;flex-direction: column;align-items: center;justify-content: center;background-color: #f7f7f7;.icon-add {font-size: 60rpx;color: #999;margin-bottom: 10rpx;}.upload-text {font-size: 24rpx;color: #999;}}.upload-tips {font-size: 24rpx;color: #999;margin-top: 10rpx;}
}
</style>

改组件可以直接调用，希望可以帮助到大家。