Is there any way of using Java or C++ to prevent all applications from writing to the SD card while my application is performing a write operation? Maybe some Linux system call which can do it?
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Is there any way of using Java or C++ to prevent all applications from writing to the SD card while my application is performing a write operation? Maybe some Linux system call which can do it?
No.
You cannot prevent from all applications to write to SDCARD. (Applications have been given equal privileged in Android in un-rooted phone)
Yes if the phone is rooted you can perform this action.