Sorry, you can't.
On Tue, Sep 14, 2010 at 10:14 AM, Great <[email protected]> wrote:
> I am writing trial start date to a file. I don't want the user to be
> able to delete this file. How can I make sure that "Clear Data" won't
> clear this file. Currently, the behavior I have seen is that the file
> is deleted if user clicks "clear data". Here is my code in case it
> helps.
>
> private static final String TRIAL_FILE_NME="trial.file" ;
> private static final String TRIAL_DIR_NME="trial";
>
> private boolean setTrialStartDate (){
>
> FileOutputStream fileWriter = null ;
> boolean returnValue = true ;
>
> try{
> File dir = getDir(TRIAL_DIR_NME, MODE_PRIVATE);
> File trialFile = new File(dir, TRIAL_FILE_NME);
>
> fileWriter = openFileOutput(trialFile.getName(),
> MODE_PRIVATE);
>
> fileWriter.write(DateTimeUtil.getCurrentDateString().getBytes());
> fileWriter.flush();
> }
> catch (FileNotFoundException filenotFound){
> returnValue = false ;
> }
> catch (IOException exception){
> returnValue = false ;
> }
> finally{
> if ( fileWriter != null ){
> try{
> fileWriter.close();
> }
> catch (IOException exc){
> fileWriter = null ;
> returnValue = false ;
> }
> }
> }
>
> return returnValue ;
> }
>
> private String getTrialStartDate (){
>
> FileInputStream fileReader = null ;
> String dateString = null ;
>
> try{
> File dir = getDir(TRIAL_DIR_NME, MODE_PRIVATE);
> File trialFile = new File(dir, TRIAL_FILE_NME);
> fileReader = openFileInput(trialFile.getName());
> byte[] totalBytes = new byte[fileReader.available()];
>
> if ( fileReader.read(totalBytes) != -1 ){
> dateString = new String (totalBytes);
> }
> }
>
> catch (FileNotFoundException exception){
> setTrialStartDate();
> dateString = DateTimeUtil.getCurrentDateString();
> }
> catch (IOException exc){
> //Error reading file. Simply return null
> dateString = null ;
> }
> finally{
> if ( fileReader != null ){
> try{
> fileReader.close();
> }
> catch (IOException exc){
> //Although it might be safe to return what's
> in dateString at
> this
> //point, but since there is an I/O issue, it
> is better to
> return
> //null
> dateString = null ;
> fileReader = null ;
> }
> }
> }
>
> return dateString ;
> }
>
> --
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>
--
Dianne Hackborn
Android framework engineer
[email protected]
Note: please don't send private questions to me, as I don't have time to
provide private support, and so won't reply to such e-mails. All such
questions should be posted on public forums, where I and others can see and
answer them.
--
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