Not getting file through FileInputStream?

Question

I am trying to check file position so that it would not be overwritten. For this purpose I have to use FileInputStream because it has a method position() that can be use with FileChannel. BufferedReader does not maintain position.

My code is:

FileChannel fc = null;
FileInputStream fis = null; 
int i=0;
long pos;
char c;
fis = new FileInputStream("File.txt");
 while((i=fis.read())!=-1)
 {
 fc = fis.getChannel();
 pos = fc.position();
 c = (char)i;
 System.out.print("No of bytes read: "+pos);
 System.out.println("; Char read: "+c);
 }

I am getting java.io.FileNotFoundException:

/doneQuestionDetail.txt: open failed: ENOENT (No such file or directory)

This error means it is not getting file from location because file doesn't exsist there and if I use BufferedReader:

BufferedReader inputReader = new BufferedReader(
 new InputStreamReader(openFileInput("File.txt")));

It does not give any error in this line meaning file exists and FileInputStream is not getting file.

After searching I got to get location first and then give it to FileInputStream, then I changed code like:

String extr = Environment.getExternalStorageDirectory().toString();
 File mFolder = new File(extr + "/imotax");
 String s = "doneQuestionDetail.txt";
 File f = new File(mFolder.getAbsolutePath(), s);
 fis = new FileInputStream(f);

Now I am getting an error:

java.io.FileNotFoundException: /mnt/sdcard/imotax/File.txt: open failed: ENOENT (No such file or directory)

Hope for your suggestions. Thanks.

Answer 1

Try following code.

File sdCard = Environment.getExternalStorageDirectory();
File dir = new File(sdCard.getAbsolutePath() + File.separator
 + "/imotax");
dir.mkdirs();
File f= new File(dir, fileToCreate);
if(!f.exists()){
f.createNewFile();
}
fis = new FileInputStream(f);