错误:找不到 com.google.firebase.storage.UploadTask.TaskSnapshot 类型的符号方法 getDownloadUrl()

问题描述

在 gradle 更新之前一切正常，但后来出现了这个错误.我参考了官方文档，它提供了相同的代码.不接受 getDownloadUrl() 方法

Before gradle update everything worked fine, but later on this error popped up. I have referred to the official documents and it provides the same code.Not accepting the getDownloadUrl() method

我添加了最新的正确依赖项，并且 gradle 同步成功.app/build.gradle

I have added the correct dependency which is latest and the gradle sync is successful.app/build.gradle

这是 firebase 文档中提供的示例代码，与我的相同.Firebase 助手

This is the sample code provided in firebase docs which is same as mine.Firebase Assistant

即使所有必需的东西都存在，我也无法理解可能会出现什么问题.卡在这个问题上 2 天了，请帮忙！

I'm unable to understand what could possibly go wrong even if all required things are present. Stuck on this since 2 days, please help!

推荐答案

正如 Doug 所指出的，UploadTask.getDownloadUrl() 已被弃用，因此请使用 StorageReference.getDownloadUrl().

As Doug pointed out, UploadTask.getDownloadUrl() is deprecated, so use StorageReference.getDownloadUrl().

但是 StorageReference.getDownloadUrl() 返回 Task，必须异步处理，你不能做 Uri downloadUrl = photoRef.getDownloadUrl().getResult(); 否则你将得到 java.lang.IllegalStateException: 任务尚未完成

But StorageReference.getDownloadUrl() returns Task, which must be handled asynchronously, you cannot do Uri downloadUrl = photoRef.getDownloadUrl().getResult(); else you will get java.lang.IllegalStateException: Task is not yet complete

因此，像这样异步处理它

Therefore, handle it asynchronously like this

 photoRef.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
                    @Override
                    public void onSuccess(Uri uri) {
                        Uri downloadUrl = uri;
                        Toast.makeText(getBaseContext(), "Upload success! URL - " + downloadUrl.toString() , Toast.LENGTH_SHORT).show();
                    }
                });

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