How to write / read an array to a file in android

Question

I am writing a file in android and reading from the same file using the code below:

//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 code to read from a file:

        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 of now, I can only save the line in this file. I like to write a DATE array, and also read data as an array. I know that the return type of the read method will be changed, but I don’t understand how to read and write a DATE array or any other array to a file.

thank

Answer 1

In this case, your best bet is to use JSON. This will allow you to save the array in String format, read it and convert it back to the original array.

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