最近在开发一个app，选取本地文件上传

安卓选择本地文件时，需要返回文件路径，然后调用uni-app的上传接口去上传文件。首先是要选择文件，并返回文件路径

// chooseFile.js文件内容
function chooseFile(callback, acceptType) {
	//acceptType为你要查的文件类型"image/*"，"audio/*"，"video/*;image/*"  
	// intent.setType("image/*");
	//intent.setType("audio/*"); 
	//选择音频
	//intent.setType("video/*;image/*"); 
	//选择视频 （mp4 3gp 是android支持的视频格式）
    var CODE_REQUEST = 1000;
    var main = plus.android.runtimeMainActivity();
    if(plus.os.name == 'Android') {
        var Intent = plus.android.importClass('android.content.Intent');
        var intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        if(acceptType) {
            intent.setType(acceptType);
        } else {
            intent.setType("*/*");
        }
        main.onActivityResult = function(requestCode, resultCode, data) {
            if(requestCode == CODE_REQUEST) {
                var uri = data.getData();
                plus.android.importClass(uri);
                var Build = plus.android.importClass('android.os.Build');
                var isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

                var DocumentsContract = plus.android.importClass('android.provider.DocumentsContract');
                // DocumentProvider
                if(isKitKat && DocumentsContract.isDocumentUri(main, uri)) {
                        console.log("版本大于 4.4 ");
                    // ExternalStorageProvider
                    if("com.android.externalstorage.documents" == uri.getAuthority()) {
                        var docId = DocumentsContract.getDocumentId(uri);
                        var split = docId.split(":");
                        var type = split[0];

                        if("primary" == type) {
                            var Environment = plus.android.importClass('android.os.Environment');
                            callback(Environment.getExternalStorageDirectory() + "/" + split[1]);
                        } else {
                            var System = plus.android.importClass('java.lang.System');
                            var sdPath = System.getenv("SECONDARY_STORAGE");
                            if(sdPath) {
                                callback(sdPath + "/" + split[1]);
                            }
                        }
                    }
                    // DownloadsProvider
                    else if("com.android.providers.downloads.documents" == uri.getAuthority()) {
                        var id = DocumentsContract.getDocumentId(uri);
                        var ContentUris = plus.android.importClass('android.content.ContentUris');
                        var contentUri = ContentUris.withAppendedId(
                        //    Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
                        Uri.parse("content://downloads/public_downloads"), id);
                        callback(getDataColumn(main, contentUri, null, null));
                    }
                    // MediaProvider
                    else if("com.android.providers.media.documents" == uri.getAuthority()) {
                        var docId = DocumentsContract.getDocumentId(uri);
                        var split = docId.split(":");
                        var type = split[0];

                        var MediaStore = plus.android.importClass('android.provider.MediaStore');
                        if("image" == type) {
                        contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                        } else if("video" == type) {
                        contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                        } else if("audio" == type) {
                        contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                        }

                        var selection = "_id=?";
                        var selectionArgs = new Array();
                        selectionArgs[0] = split[1];

                        callback(getDataColumn(main, contentUri, selection, selectionArgs));
                    }
                }
                // MediaStore (and general)
                else if("content" == uri.getScheme()) {
                    callback(getDataColumn(main, uri, null, null));
                }
                // File
                else if("file" == uri.getScheme()) {
                    callback(uri.getPath());
                }
            }
        }
        main.startActivityForResult(intent, CODE_REQUEST);
    }
}

function getDataColumn(main, uri, selection, selectionArgs) {
        plus.android.importClass(main.getContentResolver());
        let cursor = main.getContentResolver().query(uri, ['_data'], selection, selectionArgs,
        null);
        plus.android.importClass(cursor);
        if(cursor != null && cursor.moveToFirst()) {
        var column_index = cursor.getColumnIndexOrThrow('_data');
        var result = cursor.getString(column_index)
        cursor.close();
        return result;
        }
        return null;
}

export default chooseFile

vue页面内容
<template>
	<view class="s_page">
		<view class="container mb40">
			<view class="form-item flex_ac mb30">
				<view class="title f24_999">播报名称</view>
				<view class="flex_ac input-con">
					<input class="f24_333 flex-1" type="text" placeholder="请输入播报名称">
				</view>
			</view>
			<view class="form-item mb30 flex">
				<view class="title f24_999">播报内容</view>
				<view class="input-con area">
					<textarea class="f24_333" maxlength="150" placeholder="请输入备注信息（150字以内）" />
					</view>
			</view>
			<view class="form-item flex_ac mb30">
				<view class="title f24_999">播报语音</view>
				<view id="btn" @tap.stop="addFile" class="btn f24_49C"
					style="opacity: 0;"
				>选择文件</view>
				<view class=" flex mr30">
					<image class="audio" src="/static/image/audio.png" mode=""></image>
					<view>
						<view class="f24_666 mb10">关闭电梯.mp3</view>
						<view class="f20_999">00:53</view>
					</view>
				</view>
				<text class="f24_49C">重新选择</text>
			</view>
		</view>
		<view class="confirm-btn">添加方案</view>
	</view>
</template>

<script>
	import axios from '@/api/axios.js';
	import chooseFile from '@/utils/chooseFile.js';
	export default {
		data() {
			return {
				id:'',
				report_name:'',
				content:'',
				voice_link_id:'',
				CustomBar:this.CustomBar
			};
		},
		onLoad({id}){
			this.id = id;
		},
		mounted(){
			
		},
		methods:{
			addFile(){
				chooseFile((res)=>{
					axios.uploadImg('file://'+res).then(res=>{
						console.log(res);
					});
				},"audio/*")
			},
		}
	}
</script>

<style scoped lang="scss">
.s_page{
	padding: 20rpx 30rpx;
	.container{
		background-color: #FFFFFF;
		border-radius:10rpx;
		padding: 20rpx;
		.form-item{
			.title{
				width: 120rpx;
				flex: 0 0 120rpx;
			}
			.audio{
				width: 44rpx;
				height: 56rpx;
				margin-right: 20rpx;
			}
			.btn{
				@include flex_abc;
				width:140rpx;
				height:64rpx;
				border-radius:32rpx;
				border:2rpx solid rgba(73,205,223,1);
			}
			.input-con{
				height:80rpx;
				background:rgba(247,247,247,1);
				border-radius:10rpx;
				width: 100%;
				padding:0 20rpx;
				&.area{
					height:200rpx;
					background:rgba(247,247,247,1);
					border-radius:10rpx;
					padding: 16rpx 20rpx;
					textarea{
						width: 100%;
						height: 100%;
						display: block;
					}
				}
			}
		}
	}
}
</style>

//图片上传方法

重点还是在这张图，返回的路径必须前面带上file://，不然上传失败

转载https://www.cnblogs.com/lizhao123/p/9951581.html