writing .json file and read that file in Android

Question

i m writing .json file and i want to read that file, but the problem is, when i try to read whole file as string it adds the space before and after every character and just

Answer 1

Your writing code is the problem. Just use

FileWriter fos = new FileWriter(mypath);
fos.write(response);

Answer 2

Write below method for Write Json File, Here params is a File Name and mJsonResponse is a Server Response.

For Create Files into Internal Memory of Application

public void mCreateAndSaveFile(String params, String mJsonResponse) {
    try {
        FileWriter file = new FileWriter("/data/data/" + getApplicationContext().getPackageName() + "/" + params);
        file.write(mJsonResponse);
        file.flush();
        file.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

For Read Data From Json File, Here params is File Name.

public void mReadJsonData(String params) {
    try {
        File f = new File("/data/data/" + getPackageName() + "/" + params);
        FileInputStream is = new FileInputStream(f);
        int size = is.available();
        byte[] buffer = new byte[size];
        is.read(buffer);
        is.close();
        String mResponse = new String(buffer);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

Answer 3

writeChars writes each character as two bytes.

http://docs.oracle.com/javase/6/docs/api/java/io/DataOutputStream.html#writeChars(java.lang.String)

http://docs.oracle.com/javase/6/docs/api/java/io/DataOutputStream.html#writeChar(int)

Writes a char to the underlying output stream as a 2-byte value, high byte first. If no exception is thrown, the counter written is incremented by 2.

Answer 4

I like above answer and edited: I just love to share so i have shared that may be useful to others.

Copy and Paste following class in your package and use like:

Save: MyJSON.saveData(context, jsonData);

Read: String json = MyJSON.getData(context);

import android.content.Context;
import android.util.Log;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;

/**
 * Created by Pratik.
 */
public class MyJSON {

    static String fileName = "myBlog.json";

    public static void saveData(Context context, String mJsonResponse) {
        try {
            FileWriter file = new FileWriter(context.getFilesDir().getPath() + "/" + fileName);
            file.write(mJsonResponse);
            file.flush();
            file.close();
        } catch (IOException e) {
            Log.e("TAG", "Error in Writing: " + e.getLocalizedMessage());
        }
    }

    public static String getData(Context context) {
        try {
            File f = new File(context.getFilesDir().getPath() + "/" + fileName);
            //check whether file exists
            FileInputStream is = new FileInputStream(f);
            int size = is.available();
            byte[] buffer = new byte[size];
            is.read(buffer);
            is.close();
            return new String(buffer);
        } catch (IOException e) {
            Log.e("TAG", "Error in Reading: " + e.getLocalizedMessage());
            return null;
        }
    }
}