Android Question Adler32 issue?

[tkristensen]

We are using prefix mode communications between the tablet and a windows PC. It has been working absolutely flawlessly.... until today.

Today we got a new tablet. A t-mobile Springboard 7" tablet.

We can take the exact same apk run it on a lenovo with 4.0.3 ICS (and also the Eken) and use the exact same files to send and it works everytime.

We run it on the springboard (also 4.0.3) and the windows side detects a adler error everytime.

Details on the New tablet:

Manufacturer: HUAWEI
Model: SpringBoard
Product: SpringBoard
SDK: 15

Details on the old tablet that works:
Manufacturer: LENOVO
Model: ThinkPad Tablet
Product: ThinkPadTablet
SDK: 15

Also Tested on An Eken GC10X running jellybean and it worked fine.

Anyone have a clue as to what is different in the SpringBoard?

Tom

 

[Erel]

A checksum error means that not all the data was transferred properly. It is hard to say why some of the data is missing.

 

[Rusty]

Hi Erel, I work with Tom.
The Adler checksum meaning data drops is correct, both Tom and I know this.
The problem is that if we take the exact APK and the exact WAV file(s) and put them on the three different tablets and then run our APK (which by the way is running on dozens of tablets across the USA, successfully transferring files) two of the tablets send the exact file flawlessly and very quickly, but the Springboard behaves differently.
Tom's question is, what can possibly be the difference with this one tablet/brand that might cause these different results?
Thanks,
Rusty

 

[Erel]

It might be a hardware issue. You will need to do some tests.

Try to send some small messages and see whether they arrive correctly.

 

[tkristensen]

The issue seems to be tied to approved access to the cellular network that the tablet is on, in this case T-mobile 4g.

When the tablet first came up it allowed some traffic normally and at some threshold thereafter (1 or 2 mbs of data), the packets were affected and everything failed the adler. Once we called t-mobile they properly activated the tablet everything worked as normal from that point on.

The remaining question is: Is there a way to determine programatically that the tablets 4g is truely available and authorized?

Tom

 

[Erel]

Is there a way to determine programatically that the tablets 4g is truely available and authorized?

You can try Phone.GetNetworkType. Though it will not help with the issue you describe which is vendor specific.