forum

home / developersection / forums / how to reading and parsing text file android?

Ask Question

How to Reading and parsing text file android?

Jayden Bell 2345 14-Oct-2014

Recently, I've come accross an interesting challenge, which I apparently cannot solve. I'am an android beginner, and what interests me is: How does one read from a text file(on phone, as a user) and store that parsed file into a string, processes the string, the outputs it?

for example:

code to read a file . . code to count characters . . . code to print the result on the phone screen.

android android  mobile development 
Updated on 14-Oct-2014
Jayden Bell

Jayden Bell

Follow

Can you answer this question?
Answer

1 Answers

Anonymous User

Anonymous User

14-Oct-2014
Background Async Task to load and parse filename.csv
class LoadAllIcosSD extends AsyncTask<String, String, String> {
    /**
     * Before starting background thread Show Progress Dialog
     * */
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(SynchroIcoActivitySD.this);
        pDialog.setMessage(getString(R.string.progdata));
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(false);
        pDialog.show();
    }

    protected String doInBackground(String... args) {
        try {
            String baseDir = Environment.getExternalStorageDirectory().getAbsolutePath();
            String fileName = "/myfolder/filename.csv";
            File myFile = new File(baseDir + File.separator + fileName);
            if(myFile.exists()){
            FileInputStream fIn = new FileInputStream(myFile);
            BufferedReader myReader = new BufferedReader(
                    new InputStreamReader(fIn));
            String aDataRow = "";
            String aBuffer = "";
            //how many row
            int ip=0;
            while ((aDataRow = myReader.readLine()) != null) {
                aBuffer += aDataRow + "\n";
                ip = ip+1;
            }
            String kosikx = aBuffer;
            myReader.close();
            String delims = "[\n]+";
            String delims2 = "[;]+";
            String[] riadokxxx = kosikx.split(delims);
            for (int i = 0; i < riadokxxx.length; i++) {
            String riadok1 =  riadokxxx[i];
            String[] polozkyx = riadok1.split(delims2);
            String icox =  polozkyx[0];
            String naix =  polozkyx[3] + " " + polozkyx[6];
            // creating new HashMap
            HashMap<String, String> map = new HashMap<String, String>();
            // adding each child node to HashMap key => value
            map.put(TAG_PID, icox);
            map.put(TAG_NAME, naix);
            map.put(TAG_PRICE, "!!");
            // adding HashList to ArrayList
            productsList.add(map);
                 }
            }//iffileexist


        } catch (Exception e) {
        }

        return null;
    }
    /**
     * After completing background task Dismiss the progress dialog
     * **/
    protected void onPostExecute(String file_url) {
        // dismiss the dialog after getting all products
        pDialog.dismiss();
        // updating UI from Background Thread
        runOnUiThread(new Runnable() {
            public void run() {
                /**
                 * Updating parsed JSON data into ListView
                 * */
                ListAdapter adapter = new SimpleAdapter(
                        SynchroIcoActivitySD.this, productsList,
                        R.layout.list_item_icosd, new String[] { TAG_PID, TAG_NAME, TAG_PRICE},
                        new int[] { R.id.pid, R.id.name, R.id.price });
                // updating listview
                setListAdapter(adapter);
            }
        });
    }
}

Liked By

We use cookies to ensure you have the best browsing experience on our website. By using our site, you acknowledge that you have read and understood our Cookie Policy & Privacy Policy