sd card - Issue with file I/O on android -


i met problem recently. need write tmp data file(use api fwrite) in /data/data/com../tmp on android.

the test program run on 1 thread. , write data several hundred kb 1 time.

case 1: in case, create 2 file in path first, , write 2 tmp files turns.

the write process pause few time once in while , sometime few seconds. , if write 1 tmp(but fopen 2 file) file in case, same situation.

case 2: if there 1 tmp file exist in directory. write process never pause..

why write process pause continuously in case 1 ?

thank help.

update:

i have tested several versions of android including 2.3.7 , 4.0.3, 4.1

the code is:

file *tmp1 = fopen(tmp1,"wb");  file *tmp2 = fopen(tmp2,"wb");  file *swap = tmp1;   while(..) {      if (..)          swap = tmp2;      else         swap = tmp1;      fwrite(.., swap) }


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