問題背景：
調用 media.saveToPhotosAlbum接口儲存網絡路徑的圖檔。出現錯誤提示 code=202，該如何處理？
代碼如下：
<script>
import prompt from '@system.prompt';
import media from '@system.media';
module.exports = {
data: {
componentData: {},
imgurl: "https://ywopen-1252317822.image.myqcloud.com/openwx/recommendimg/20210908/6138797a4e3b3.jpg"
},
save() {
media.saveToPhotosAlbum({
uri: this.imgurl,
success: function () {
console.log('save success');
},
fail: function (data, code) {
console.log('handling fail, code = ' + code);
}
})
}
}
</script> 
報錯提示如下：
09-16 14:12:01.511 E/jsLog (19071): saveToPhotosAlbum: input err: invalid param.
09-16 14:12:01.519 I/jsLog (19071): handling fail, code = 202
問題分析：
快應用在中的saveToPhotosAlbum接口目前僅支援本地圖檔路徑儲存到相冊，暫不支援網絡圖檔路徑導緻的。
解決方法：
想要儲存網絡路徑的圖檔需要先調用request.download接口将圖檔先下載下傳下來，拿到本地存儲的臨時圖檔路徑，再去調接口将圖檔儲存到相冊。
修改代碼如下：
<script>
import prompt from '@system.prompt';
import request from '@system.request';
import media from '@system.media';
module.exports = {
data: {
componentData: {},
imgurl: "https://ywopen-1252317822.image.myqcloud.com/openwx/recommendimg/20210908/6138797a4e3b3.jpg",
downloadtoken: '',
downloadurl: ''
},
save() {
media.saveToPhotosAlbum({
uri: this.downloadurl,
success: function () {
console.log('save success');
prompt.showToast({
message: 'save success',
})
},
fail: function (data, code) {
prompt.showToast({
message: 'handling fail, code = ' + code,
})
console.log('handling fail, code = ' + code);
}
})
},
download() {
var that = this
request.download({
"url": this.imgurl,
success: function (data) {
console.log(data.token);
that.downloadtoken = data.token
},
fail: function (data, code) {
console.log("handling fail, code = " + code);
},
complete() {
that.ondownloadcomplete()
}
})
},
ondownloadcomplete() {
var that = this
request.onDownloadComplete({
"token": this.downloadtoken,
success: function (data) {
console.log(data.uri);
that.downloadurl = data.uri
},
fail: function (data, code) {
console.log("handling fail, code = " + code);
}
})
}
}
</script> 效果如下：
09-16 14:28:03.468 I/jsLog (19152): 341
09-16 14:28:03.843 I/jsLog (19152): internal://mass/Download/6138797a4e3b3-2.jpg
09-16 14:28:05.479 I/jsLog (19152): save success
09-16 14:29:04.878 I/jsLog (19152): save success
Hello.ux頁面代碼如下：
<template>
<!-- Only one root node is allowed in template. -->
<div class="container">
<text class="txt" onclick="download">download</text>
<text class="txt" onclick="save">savetoPhotosAlbum</text>
</div>
</template>
<style>
.container {
flex-direction: column;
align-items: center;
justify-content: center;
}
.txt {
font-size: 30px;
text-align: center;
width: 50%;
height: 70px;
margin-top: 5px;
border: 1px solid #000000;
}
</style>
<script>
import prompt from '@system.prompt';
import request from '@system.request';
import media from '@system.media';
module.exports = {
data: {
componentData: {},
imgurl: "https://ywopen-1252317822.image.myqcloud.com/openwx/recommendimg/20210908/6138797a4e3b3.jpg",
downloadtoken: '',
downloadurl: ''
},
save() {
media.saveToPhotosAlbum({
uri: this.downloadurl,
success: function () {
console.log('save success');
prompt.showToast({
message: 'save success',
})
},
fail: function (data, code) {
prompt.showToast({
message: 'handling fail, code = ' + code,
})
console.log('handling fail, code = ' + code);
}
})
},
download() {
var that = this
request.download({
"url": this.imgurl,
success: function (data) {
console.log(data.token);
that.downloadtoken = data.token
},
fail: function (data, code) {
console.log("handling fail, code = " + code);
},
complete() {
that.ondownloadcomplete()
}
})
},
ondownloadcomplete() {
var that = this
request.onDownloadComplete({
"token": this.downloadtoken,
success: function (data) {
console.log(data.uri);
that.downloadurl = data.uri
},
fail: function (data, code) {
console.log("handling fail, code = " + code);
}
})
}
}
</script> 
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