How to read and write from file

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JSON

It’s very esay to read and write from a file.

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public static void writeToFile(String data, Activity activity) {
        try {
            OutputStreamWriter outputStreamWriter = new OutputStreamWriter(
                    activity.openFileOutput("config.txt", Context.MODE_PRIVATE));
            outputStreamWriter.write(data);
            outputStreamWriter.close();
        } catch (IOException e) {
            Log.e("Exception", "File write failed: " + e.toString());
        }
    }
 
    public static String readFromFile(Activity activity) {
 
        String ret = "";
 
        try {
            InputStream inputStream = activity.openFileInput("config.txt");
 
            if (inputStream != null) {
                InputStreamReader inputStreamReader = new InputStreamReader(
                        inputStream);
                BufferedReader bufferedReader = new BufferedReader(
                        inputStreamReader);
                String receiveString = "";
                StringBuilder stringBuilder = new StringBuilder();
 
                while ((receiveString = bufferedReader.readLine()) != null) {
                    stringBuilder.append(receiveString);
                }
 
                inputStream.close();
                ret = stringBuilder.toString();
            }
        } catch (FileNotFoundException e) {
            Log.e("login activity", "File not found: " + e.toString());
        } catch (IOException e) {
            Log.e("login activity", "Can not read file: " + e.toString());
        }
         return ret;
    }

One thought on “How to read and write from file”

  1. Pingback: How to read and write JSON from file with Gson • The Developer World Is Yours

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