MyUtils | 个人整理的一个工具类的集合，包括一些自定义的View

What you pasted looks ok to me, and your code works for me without errors.

1. Perhaps something before or after that code is what is spoiling the class definition?
2. Perhaps you are running this in Jupyter or in IPython and you imported ImageRotationUtils previously, but then changed the code, and tried to reimport again -- and something was wrong with the new reimport so your definition did not get over-written? If that's the case, restart the environment (or the kernel in Jupyter) and rerun the code.
3. I would suggest putting a simple initialization code, like that constructor line, into the same source file and executing it as a separate process to test if that is the code or the environment issue.

As a matter of convenience and to avoid tweaking sys.path in your code, I would suggest adding your python directory to the PYTHONPATH environment variable before you load your environment, so you can just import.

To add to @MarcGravell's answer about differences in GZip encoding, it's worth noting that it looks like you've got an endianness issue with your header bytes, which will be messing up a decoder.

Your header is 4 bytes, which encodes to 5 1/3 base64 characters. The .NET version outputs bAAAAB (the first 4 bytes of which are 6c 00 00 00), whereas the Java version outputs AAAAbB (the first 4 bytes of which are 00 00 00 6c). The fact that the b is moving by around 5 characters among a sea of A's is your first clue (A represents 000000 in base64), but decoding it makes the issue obvious.

.NET's BitConverter uses your machine architecture's endianness, which on x86 is little-endian (check BitConverter.IsLittleEndian). Java's ByteBuffer defaults to big-endian, but is configurable. This explains why one is writing little-endian, and the other big-endian.

You'll want to decide on an endianness, and then align both sides. You can change the ByteBuffer to use little-endian by calling .order(ByteBuffer.LITTLE_ENDIAN). In .NET, you can use BinaryPrimitives.WriteInt32BigEndian / BinaryPrimitives.WriteInt32LittleEndian to write with an explicit endianness if you're using .NET Core 2.1+, or use IPAddress.HostToNetworkOrder to switch endianness if necessary (depending on BitConverter.IsLittleEndian) if you're stuck on something earlier.

Can someone tell me what the above code does?

A RecyclerView.Adapter what it does is to: recycle items (as the name implies). The list doesn't have one view per item on the data source at the same time. The adapter makes sure to have enough views in memory in order to always render the list smoothly. When a row is leaving the field of view by scrolling, then that view is recycled to be re-used in the next entering view to the screen size.

This means that onCreateViewHolder is called only when a view is needed to be created. Generally at the start of the adapter, also when the user is scrolling fast or erratically and when the data set changes and is needed.

The other method onBindViewHolder is called every time the data on the row needs to be updated in order for the view to get updated. This is called every time a row is entering the view field of the screen.

So the textbook answer is: do it on onBindViewHodlder, because if the attribute isAdmin changes then that row will need to be updated. By doing it on onCreateViewHolder that would only happen one time when the row is created.

But, your isAdmin is a val on the constructor that can not be reassigned, so this means that when the rows are created the button will be hidden or visible forever. And this doesn't matter because your structure is to determine if is admin from another source that is separated from which the row data structure is derived from.

If in some case you want to:

• make it more flexible and easier to maintain in the future
• or maybe you know there is going to be a case where there is gonna be a list with admins and not admins rows

Then the solution is to move the isAdming attribute to your NoticeModel, that would imply changing your data structure.

If you want to verify anything sai above, get a data source with plenty of items and then add 2 logs, one on onCreateViewHolder and one in onBindViewHolder. You will see how on create is called only sometimes but on bind is called always.

It's because efcore utils is compiled multiple times, here is more detail How to organize multiple git packages in dotnet core

There are two possible reasons:

1. MyUtils.staticSchema returns null or
2. AnotherClass is initialized during the initialization of MyClass due to a cyclic dependency.

I assume that you've already verified/ruled out option #1 so I'll focus on the second one:

Non-trivial static field initialization that depends on other classes can be problematic, because it can introduce long dependency chains and even dependency loops in class initialization.

If class A calls a method of class B during class initialization and class B calls a method of class A during class initialization, then there's a loop: that means that some code will see half-initialized classes.

If your MyClass somehow (directly or indirectly) touches AnotherClass during class initialization then it's quite possible tha the call to MyClass.getStaticSchema() is actually executed before schemaObj is initialized.

The best solution is to make the class initialization of any class depend on as few classes as possible.

Simple sample demonstrating the problem:

You need to send the input tensor to your device, not its result:

You do not get BatchUpdateException, because you might use SQLErrorCodeSQLExceptionTranslator in jdbcTemplate, which handles BatchUpdateExceptions in a special way:

Simplifying the code would help you understand what is happening

PS: below answer is just based on assumptions on what you are trying to achieve