Write and Read a json data to internal storage android

android, arrays, file, java, json

Solution

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


private String readFromFile() {

    String ret = "";

    try {
        InputStream inputStream = context.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;
}

When read string from file convert it to JsonObject or JsonArray

JSONArray jarray = new JSONArray(str);

Problem

I have a json array received from php ``` [ { "name":"Daniel Bryan", "img":"pictures\/smallest\/dierdrepic.jpg", "username":"@dbryan", "user_id":"4" }, { "name":"Devil Hacker", "img":"pictures\/smallest\/belitapic.jpg", "username":"@dvHack", "user_id":"1" } ] ``` - What i want is to write this data in a `file_name.anyextension` in my apps data folder or anywhere safe. - Also read this data from `file_name.anyextension` and convert it to a valid `json array` that can be further edited. Can anyone show me a way how can i possibly to this thing ?

Original source