CODEWITHSUNDEEP
javaandroidfileoutputstream
learning
learning

Reputation: 37

writing to text file multiple times android

i using this function:

> private void writeToFile(String data) {
>     try {
>         OutputStreamWriter outputStreamWriter = new OutputStreamWriter(openFileOutput("mywords.txt",
> Context.MODE_PRIVATE));
>         outputStreamWriter.write(data);
>         outputStreamWriter.close();
>     }
>     catch (IOException e) {
>         Log.e("Exception", "File write failed: " + e.toString());
>     }  }

i want to write a lot of times and every time i write it changes like deletes all and adds new thing i write but i do not want it to delete

husky thanks i do not know why you deleted your comment it works i changed to MODE_APPEND

another problem how do i do space in the text file

Upvotes: 1

Views: 1401

Answers (3)

Hana Bzh
Hana Bzh

Reputation: 2260

Try this:

  private void writeToFile(String data) {


    File file = new File("mywords.txt");

    FileOutputStream fos = null;

    try {

        fos = new FileOutputStream(file, true);

        // Writes bytes from the specified byte array to this file output stream 
        fos.write(data.getBytes());

    }
    catch (FileNotFoundException e) {
        System.out.println("File not found" + e);
    }
    catch (IOException ioe) {
        System.out.println("Exception while writing file " + ioe);
    }
    finally {
        // close the streams using close method
        try {
            if (fos != null) {
                fos.close();
            }
        }
        catch (IOException ioe) {
            System.out.println("Error while closing stream: " + ioe);
        }

    }
  }

Upvotes: 0

Razz
Razz

Reputation: 220

OutputStreamWriter by default overwrites. In order to append information to a file, you will have to give it additional information in the constructor. See also OutputStreamWriter does not append for more information.

Upvotes: 0

BatScream
BatScream

Reputation: 19700

Pass true as the second argument to FileOutputStream to open the file in append mode.

OutputStreamWriter writer = new OutputStreamWriter(
                            new FileOutputStream("mywords.txt", true), "UTF-8");

Upvotes: 2

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