Question

我正在定制亚马逊的S3 Uploader示例程序以满足我的需求。创建存储桶后，我会向其上传视频。

PutObjectRequest por = new PutObjectRequest(buckets.get(0).getName(), Constants.VIDEO_NAME, new java.io.File(filePath));

当我运行上面的行时，我回到下面的例外：

Unable to calculate MD5 has: /storage/....../bla.mp4: open failed: EACCES (Permission Denied)

堆栈追踪：

12-04 14:39:21.981  29372-29441/com.amazonaws.demo.s3uploader E/ERR﹕ com.amazonaws.AmazonClientException: Unable to calculate MD5 hash: /storage/emulated/0/DCIM/Camera/VID_20131203_180120.mp4: open failed: EACCES (Permission denied)
            at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:1139)
            at com.amazonaws.demo.s3uploader.S3UploaderActivity$S3PutObjectTask.doInBackground(S3UploaderActivity.java:160)
            at com.amazonaws.demo.s3uploader.S3UploaderActivity$S3PutObjectTask.doInBackground(S3UploaderActivity.java:120)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
     Caused by: java.io.FileNotFoundException: /storage/emulated/0/DCIM/Camera/VID_20131203_180120.mp4: open failed: EACCES (Permission denied)
            at libcore.io.IoBridge.open(IoBridge.java:409)
            at java.io.FileInputStream.<init>(FileInputStream.java:78)
            at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:1135)
            at com.amazonaws.demo.s3uploader.S3UploaderActivity$S3PutObjectTask.doInBackground(S3UploaderActivity.java:160)
            at com.amazonaws.demo.s3uploader.S3UploaderActivity$S3PutObjectTask.doInBackground(S3UploaderActivity.java:120)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
     Caused by: libcore.io.ErrnoException: open failed: EACCES (Permission denied)
            at libcore.io.Posix.open(Native Method)
            at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
            at libcore.io.IoBridge.open(IoBridge.java:393)
            at java.io.FileInputStream.<init>(FileInputStream.java:78)
            at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:1135)
            at com.amazonaws.demo.s3uploader.S3UploaderActivity$S3PutObjectTask.doInBackground(S3UploaderActivity.java:160)
            at com.amazonaws.demo.s3uploader.S3UploaderActivity$S3PutObjectTask.doInBackground(S3UploaderActivity.java:120)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)

OS = 4.4 / KitKat，Device = Nexus 4

发生了什么事？

Answer 1

不要像我一样。在尝试上传到S3之前检查文件是否存在。

Answer 2

从KitKat，您无法在未经许可的情况下阅读外部存储空间。

见

http://developer.android.com/about/versions/android-4.4.html#Behaviors

http://developer.android.com/reference/android/Manifest.permission.html#READ_EXTERNAL_STORAGE

AWS / Android无法计算md5哈希值

2 个答案: