How to write/read array to file in android

Question

I am writing to file in android and read from the same file using the below code:

//Write data on file
FileOutputStream fOut = null;

    OutputStreamWriter osw = null;

    try {

        fOut = openFileOutput("gasettings.dat", MODE_PRIVATE);


        osw = new OutputStreamWriter(fOut);

        osw.write(data);

        osw.flush();

        Toast.makeText(context, "Settings saved", Toast.LENGTH_SHORT)
        .show();

    }

    catch (Exception e) {

        e.printStackTrace();


    }

and the code for reading from file is:

        InputStreamReader isr = null;
fileInputStream fIn = null;

    char[] inputBuffer = new char[255];

    String data = null;

    try {

        fIn = openFileInput("gasettings.dat");

        isr = new InputStreamReader(fIn);

        isr.read(inputBuffer);

        data = new String(inputBuffer);



    }

    catch (Exception e) {

        e.printStackTrace();



    }

as per now I am only able to save a string to this file. I like to write a DATE array to it and also want to read back the data as array. I know that the return type of read method will be changed, but I am not getting the idea of how to read and write the DATE array or any other array to the file.

Thanks

Cristian · Accepted Answer · 2010-06-25 05:46:53Z

1

In that case, your better choice is using JSON. It will allow you to save an array in String format, read it back and convert it again into the original array.

Take a look of this example: http://senior.ceng.metu.edu.tr/2009/praeda/2009/01/11/a-simple-restful-client-at-android/

answered Jun 25, 2010 at 5:46

Cristian

200k63 gold badges360 silver badges265 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Cristian Over a year ago

As dead as Bambi's mother. Just Google: "android json file" and you will get more info than you will be able to read in years.

Collectives™ on Stack Overflow

How to write/read array to file in android

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related