我正在尝试为我的Android Studio应用程序使用Eclipse Java创建Firebase管理面板,并且希望能够将内容(pdf,其他文件等)上传到Firebase存储,以便用户可以通过我的应用程序下载此内容。有什么办法可以实现?
我尝试使用下面的代码来查看这是否适合我的需求:

Bucket bucket = StorageClient.getInstance().bucket();

Storage storage = StorageOptions.newBuilder()
                .setCredentials(credentials)
                .build()
                .getService();


BlobId blobId = BlobId.of(bucket.getName(), "folder");
System.out.println("Blob Id:"+blobId);
BlobInfo blobInfo =
BlobInfo.newBuilder(blobId).setContentType("text/plain").build();
System.out.println("Blob Info:"+blobInfo);
Blob blob = storage.create(blobInfo, "Hello, Cloud
Storage!".getBytes(UTF_8));


但是.....我得到这个NullPointerException

java.lang.NullPointerException
    at java.base/java.lang.String.getBytes(String.java:956)at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)


我似乎无法获得有关此的更多信息...任何帮助将不胜感激!

最佳答案

我没有确定所有需要的代码,但似乎您有变量UTF_8且未分配。我想这应该是字符串值“ UTF-8”。

如果您想参考一下,我发现了类似that的内容

希望对您有所帮助!

09-10 06:15
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