如何缩短网络错误时的 Firebase 存储下载重试时间答案

【问题标题】：How to shorten Firebase storage download retrying period on Network Error如何缩短网络错误时的 Firebase 存储下载重试时间
【发布时间】：2017-07-18 15:40:57
【问题描述】：

我有从 Firebase 存储下载文件的基本工作代码。

String key = "gs://.../test.jpg";
File file = new File(getCacheDir() + File.separator + "test.jpg");

FirebaseStorage storage = FirebaseStorage.getInstance();
StorageReference gsRef = storage.getReferenceFromUrl(key);

gsRef.getFile(file)
.addOnSuccessListener(new OnSuccessListener<FileDownloadTask.TaskSnapshot>()
{
    @Override
    public void onSuccess(FileDownloadTask.TaskSnapshot taskSnapshot)
    {
        Log.d("APP", "onSuccess");
    }
}).addOnFailureListener(new OnFailureListener()
{
    @Override
    public void onFailure(@NonNull Exception exception)
    {
        Log.d("APP", "onFailure: ", exception);
    }
});

但是，如果在设备未连接到 Internet 的情况下执行上述代码，则最终触发 onFailure 事件需要将近 10 分钟。与此同时，日志中充满了重复的重试：

02-27 21:41:07.203 12954-13288/com.example.test E/StorageUtil: error getting token java.util.concurrent.ExecutionException: com.google.firebase.FirebaseException: An internal error has occurred. [ <<Network Error>> ]
02-27 21:41:08.244 12954-13288/com.example.test W/ExponenentialBackoff: network unavailable, sleeping.
02-27 21:41:08.294 12954-13288/com.example.test E/StorageUtil: error getting token java.util.concurrent.ExecutionException: com.google.firebase.FirebaseException: An internal error has occurred. [ <<Network Error>> ]
02-27 21:41:09.405 12954-13288/com.example.test W/ExponenentialBackoff: network unavailable, sleeping.
02-27 21:41:09.485 12954-13288/com.example.test E/StorageUtil: error getting token java.util.concurrent.ExecutionException: com.google.firebase.FirebaseException: An internal error has occurred. [ <<Network Error>> ]

有没有办法可以缩短（自定义）重试周期并更快地触发onFailure 事件？

【问题讨论】：

标签： android firebase firebase-storage

【解决方案1】：

是的，您可以使用setMaximum{OPERATION}RetryTimeMillis() 方法配置上传、下载和其他操作的超时时间：

FirebaseStorage storage = FirebaseStorage.getInstance();
storage.setMaxDownloadRetryTimeMillis(60000);  // wait 1 min for downloads
storage.setMaxOperationRetryTimeMillis(10000);  // wait 10s for normal ops
storage.setMaxUploadRetryTimeMillis(120000);  // wait 2 mins for uploads

见the reference docs for more，

【讨论】：