Downloading large amount of data

[swap842]

Hi all


I am making one j2me application in which application will download large amount of data around 3MB at the start of application and use the same at later stage in application.so my question is how i will come to know that much amount of memory is available or not where i am saving downloaded data.So please help me...how i will come to know if memory is full or sufficient memory is not available

Thanks in advance.

[raj_J2ME]

You can get the available and used memory in mobile with the help of the java runtime.
You can find the below code of much helpful.You can take a form and set this as the displayable in the midlet, some of the code segment is..

Runtime runTime = Runtime.getRuntime();
form.append("Total memory: " + runTime.totalMemory());
form.append("Free memory: " + runTime.freeMemory());
display.setCurrent(form);

[swap842]

Hi raj thanks for your reply.
actually i am not looking for run time memory but i am asking about memory available on the device to store downloaded data.it can be phone memory i.e.gallery or memory card.i am downloading data from server and saving in local memory so how i will get to know sufficient memory is available or not on the device.or while saving data if memory becomes full then??

[grahamhughes]

Raj's advice is important... if you're downloading by HTTP, you won't be able to download more data than you have available heap memory.

What device(s) are you planning to use?

Graham.

[ektasrv]

I am making one j2me application in which application will download large amount of data around 3MB at the start of application and use the same at later stage in application.so my question is how i will come to know that much amount of memory is available or not where i am saving downloaded data.So please help me...how i will come to know if memory is full or sufficient memory is not available

Hi Swapnil,

if you are using RMS to store this data, try rs.getSizeAvailable()to see if you have the required space in your recordstore to save this much data.

thanks,
Ekta

[raj_J2ME]

Hey guy's,
Kindly note that his requirement is to save the data of few MB, you can read this quoted paragraph.

am making one j2me application in which application will download large amount of data around 3MB at the start of application and use the same at later stage in application.so my question is how i will come to know that much amount of memory is available or not where i am saving downloaded data.So please help me...how i will come to know if memory is full or sufficient memory is not available

SO RMS will not be the solution for such a need.He has to save the data in the File system of the device.

And as swap842 ask -

actually i am not looking for run time memory but i am asking about memory available on the device to store downloaded data.it can be phone memory i.e.gallery or memory card.i am downloading data from server and saving in local memory so how i will get to know sufficient memory is available or not on the device.or while saving data if memory becomes full then??

[ektasrv]

If you problems or your datasize is too large to store in RMS, you can go for JSR-75 FCA API and use -- File Connection. availableSize() to get to know the available free memory on the device filesystem in the selected drive.

availableSize


public long availableSize()
Determines the free memory that is available on the file system the file or directory resides on. This may only be an estimate and may vary based on platform-specific file system blocking and metadata information.
Returns:
The available size in bytes on a file system, or -1 if the file system is not accessible.
Throws:
java.lang.SecurityException - if the security of the application does not have read access to the root volume.
IllegalModeException - if the application does have read access to the directory but has opened the connection in Connector.WRITE mode.
ConnectionClosedException - if the connection is closed.

thanks,
Ekta

[swap842]

Hi raj and ekta



Thanks for your information this will help me in developing my application.