android:cannot read the flatbuffers data from file
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I just started useing flatbuffers in my project. I write a simple demo application. The github project is here. This demo converts the pre-packaged json to flatbuffers and saves it the file, and prints the time cost by reading from JSON and reading from the flatbuffers file.
It seems successfully save the flatbuffer to file, I can see the file, plugin, in the application interval file dir and its size is not zero, which is about 280k if the original JSON is about 500k. But I failed to read the data from flatbuffer.
Reading the plugin file is successful, the ByteBuffer is non-zero. But when parsing it
Plugins plugins = Plugins.getRootAsPlugins(byteBuffer);
int length = plugins.pluginLength();
I find the length is zero. So there is some problems when parsing it. How to read it from the flatbuffers file?
android flatbuffers
add a comment |
I just started useing flatbuffers in my project. I write a simple demo application. The github project is here. This demo converts the pre-packaged json to flatbuffers and saves it the file, and prints the time cost by reading from JSON and reading from the flatbuffers file.
It seems successfully save the flatbuffer to file, I can see the file, plugin, in the application interval file dir and its size is not zero, which is about 280k if the original JSON is about 500k. But I failed to read the data from flatbuffer.
Reading the plugin file is successful, the ByteBuffer is non-zero. But when parsing it
Plugins plugins = Plugins.getRootAsPlugins(byteBuffer);
int length = plugins.pluginLength();
I find the length is zero. So there is some problems when parsing it. How to read it from the flatbuffers file?
android flatbuffers
add a comment |
I just started useing flatbuffers in my project. I write a simple demo application. The github project is here. This demo converts the pre-packaged json to flatbuffers and saves it the file, and prints the time cost by reading from JSON and reading from the flatbuffers file.
It seems successfully save the flatbuffer to file, I can see the file, plugin, in the application interval file dir and its size is not zero, which is about 280k if the original JSON is about 500k. But I failed to read the data from flatbuffer.
Reading the plugin file is successful, the ByteBuffer is non-zero. But when parsing it
Plugins plugins = Plugins.getRootAsPlugins(byteBuffer);
int length = plugins.pluginLength();
I find the length is zero. So there is some problems when parsing it. How to read it from the flatbuffers file?
android flatbuffers
I just started useing flatbuffers in my project. I write a simple demo application. The github project is here. This demo converts the pre-packaged json to flatbuffers and saves it the file, and prints the time cost by reading from JSON and reading from the flatbuffers file.
It seems successfully save the flatbuffer to file, I can see the file, plugin, in the application interval file dir and its size is not zero, which is about 280k if the original JSON is about 500k. But I failed to read the data from flatbuffer.
Reading the plugin file is successful, the ByteBuffer is non-zero. But when parsing it
Plugins plugins = Plugins.getRootAsPlugins(byteBuffer);
int length = plugins.pluginLength();
I find the length is zero. So there is some problems when parsing it. How to read it from the flatbuffers file?
android flatbuffers
android flatbuffers
asked Nov 22 '18 at 10:17
mianlaoshumianlaoshu
5151724
5151724
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1 Answer
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You do a FileOutputStream.write
on the underlying ByteBuffer
you got from FlatBuffers via FlatBufferBuilder.dataBuffer
. This buffer stores the FlatBuffer data, but it does not necessarily start at 0, you need to write from ByteBuffer.position
onwards.
See also https://google.github.io/flatbuffers/flatbuffers_guide_tutorial.html (select Java).
Why don't you read the link above?
– Aardappel
Nov 23 '18 at 15:45
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You do a FileOutputStream.write
on the underlying ByteBuffer
you got from FlatBuffers via FlatBufferBuilder.dataBuffer
. This buffer stores the FlatBuffer data, but it does not necessarily start at 0, you need to write from ByteBuffer.position
onwards.
See also https://google.github.io/flatbuffers/flatbuffers_guide_tutorial.html (select Java).
Why don't you read the link above?
– Aardappel
Nov 23 '18 at 15:45
add a comment |
You do a FileOutputStream.write
on the underlying ByteBuffer
you got from FlatBuffers via FlatBufferBuilder.dataBuffer
. This buffer stores the FlatBuffer data, but it does not necessarily start at 0, you need to write from ByteBuffer.position
onwards.
See also https://google.github.io/flatbuffers/flatbuffers_guide_tutorial.html (select Java).
Why don't you read the link above?
– Aardappel
Nov 23 '18 at 15:45
add a comment |
You do a FileOutputStream.write
on the underlying ByteBuffer
you got from FlatBuffers via FlatBufferBuilder.dataBuffer
. This buffer stores the FlatBuffer data, but it does not necessarily start at 0, you need to write from ByteBuffer.position
onwards.
See also https://google.github.io/flatbuffers/flatbuffers_guide_tutorial.html (select Java).
You do a FileOutputStream.write
on the underlying ByteBuffer
you got from FlatBuffers via FlatBufferBuilder.dataBuffer
. This buffer stores the FlatBuffer data, but it does not necessarily start at 0, you need to write from ByteBuffer.position
onwards.
See also https://google.github.io/flatbuffers/flatbuffers_guide_tutorial.html (select Java).
answered Nov 22 '18 at 15:34
AardappelAardappel
2,85311214
2,85311214
Why don't you read the link above?
– Aardappel
Nov 23 '18 at 15:45
add a comment |
Why don't you read the link above?
– Aardappel
Nov 23 '18 at 15:45
Why don't you read the link above?
– Aardappel
Nov 23 '18 at 15:45
Why don't you read the link above?
– Aardappel
Nov 23 '18 at 15:45
add a comment |
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