Create/Read File

felix · by **felix** » Mon Mar 17, 2008 6:13 pm

Well,

I'm reading about the files manipulation in android, but all methods what I found not works. In the DDMS perspective i'm not see the files folder, and i've tried to read the file, but not work, see my code above:

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                 FileOutputStream fOut = openFileOutput("a.txt",
 
                                          MODE_WORLD_READABLE);
 
                 OutputStreamWriter osw = new OutputStreamWriter(fOut); 
 
                 // Write the string to the file
 
                 osw.write("Hello World!");
 
                 /* ensure that everything is
 
                  * really written out and close */
 
                 osw.flush();
 
                 osw.close();
 
Parsed in 0.030 seconds,  using GeSHi 1.0.8.4

This is throws a FileNotFoundException, I've tried to read a file, and it not work

Thanks for your help

cadlg · by **cadlg** » Mon Mar 17, 2008 7:06 pm

Hi felix.

If that exception is shown at design time (not really thrown as an exception at run time), you just need to place your code inside a try-catch block.

If that's the case, try tomething like this:

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            FileOutputStream fOut;
 
            OutputStreamWriter osw;
 
            try {
 
                fOut = openFileOutput("a.txt",MODE_WORLD_READABLE); 
 
            } catch (FileNotFoundException e1) {
 
                e1.printStackTrace(); // or do something else
 
                fOut = null;
 
            }
 
                osw = new OutputStreamWriter(fOut); 
 
            try {
 
                //      Write the string to the file 
 
                osw.write("Hello World!"); 
 
                /* ensure that everything is 
 
                 * really written out and close */ 
 
                osw.flush(); 
 
                osw.close();             
 
            } catch (IOException e1) {
 
                e1.printStackTrace(); // or do something else
 
            }
 
Parsed in 0.033 seconds,  using GeSHi 1.0.8.4

Regards,

cadlg

felix · by **felix** » Mon Mar 17, 2008 7:22 pm

I'm have a try/catch, i'm not put is here.

This raise an FileNotFoundException in the fOut = openFileOutput("a.txt",MODE_WORLD_READABLE);

thanks for the reply

kiran · by **kiran** » Tue Mar 18, 2008 8:45 am

Hi,

This works for me.

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try {
 
                        FileOutputStream fOut = openFileOutput("samplefile.txt",MODE_WORLD_READABLE);
 
                        OutputStreamWriter osw = new OutputStreamWriter(fOut);
 
                        try {
 
                                osw.write("HelloAndroid");
 
                                osw.flush();
 
                    osw.close();
 
                        } catch (IOException e) {
 
                                e.printStackTrace();
 
                        }
 
                } catch (FileNotFoundException e) {
 
                        e.printStackTrace();
 
                } 
Parsed in 0.034 seconds,  using GeSHi 1.0.8.4