android - How to create a file of specific size on sd card programatically -

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can 1 please let me know how create file of specific size on sd card programatically. did tried shell command of no use, 

try {    process p = runtime.getruntime().exec("dd of=/mnt/extsdcard/output.dat bs=1 seek=1m count=0"); } catch (ioexception e1) {  }

i did try same command in shell script , not able create file. guess since device not rooted, command did not work.

any regarding highly appreciated.

-regards, manju

you can use randomaccessfile shown here.


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