File operation in android

Question

Hi All,

I am new to android platform. I need to create a text file in android. Please let me know how to perform this task in android. I have written a code that is working fine in java but not in android. Please help me on this....the sample code that ihave written is :-

try { DataOutputStream dos = new DataOutputStream(new FileOutputStream("test.txt", true)); dos.writeBytes(dataLine); dos.close(); } catch (FileNotFoundException ex) {}

the above code snippet is working fine in java but not in android :(

Thanks, Ashish

Answer 1

The Android Dev Guide explains it nicely:

String FILENAME = "hello_file";
String string = "hello world!";

FileOutputStream fos = openFileOutput(FILENAME, Context.MODE_PRIVATE);
fos.write(string.getBytes());
fos.close();

If you want the files you create to be visible to the outside world, use external storage. But as I said in the comment, make sure you're "being a good citizen". These files stick around even after the user uninstalls your app.

Answer 2

final File sdcard=Environment.getExternalStorageDirectory();

button.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            File path=new File(sdcard,"textfile.txt");
            try {

                BufferedWriter wr=new BufferedWriter(new FileWriter(path));
                wr.write("Your Text Here");
                wr.close();

            } catch (IOException e) {

                e.printStackTrace();
            }

        }

Also you need to add a permission WRITE_EXTERNAL_STORAGE' to your manifest file