How to read text file in android from web?

Question

I am new to android.I need to read text file from Web and display that text file.Is there any possibility to view a text file directly in android. or else how to read and display the text file in android textview ?

score 20 · Accepted Answer · answered May 23 '11 at 15:42

Use the DefaultHttpClient httpclient = new DefaultHttpClient();

HttpGet httppost = new HttpGet("http://www.urlOfThePageYouWantToRead.nl/text.txt");
HttpResponse response = httpclient.execute(httppost);
        HttpEntity ht = response.getEntity();

        BufferedHttpEntity buf = new BufferedHttpEntity(ht);

        InputStream is = buf.getContent();


        BufferedReader r = new BufferedReader(new InputStreamReader(is));

        StringBuilder total = new StringBuilder();
        String line;
        while ((line = r.readLine()) != null) {
            total.append(line + "\n");
        }

        TextView.setText(total);

Hope this helps!

Why did you used append, if you used + after? It should be append(line).append('\n') — Boldijar Paul, Oct 04 '15 at 11:25

score 6 · Answer 2 · answered Jul 23 '14 at 12:13

@BadSkillz is right but in API last 9 it make error:

    android.os.NetworkOnMainThreadException

because you must do networking operation in another thread because networking in main thread makes your application unresponsive for duration of any request so you can add this class into your activity:

private class GetStringFromUrl extends AsyncTask<String, Void, String> {

    ProgressDialog dialog ;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();

        // show progress dialog when downloading 
        dialog = ProgressDialog.show(MainActivity.this, null, "Downloading...");
    }

    @Override
    protected String doInBackground(String... params) {

        // @BadSkillz codes with same changes
        try {
            DefaultHttpClient httpClient = new DefaultHttpClient();
            HttpGet httpGet = new HttpGet(params[0]);
            HttpResponse response = httpClient.execute(httpGet);
            HttpEntity entity = response.getEntity();

            BufferedHttpEntity buf = new BufferedHttpEntity(entity);

            InputStream is = buf.getContent();

            BufferedReader r = new BufferedReader(new InputStreamReader(is));

            StringBuilder total = new StringBuilder();
            String line;
            while ((line = r.readLine()) != null) {
                total.append(line + "\n");
            }
            String result = total.toString();
            Log.i("Get URL", "Downloaded string: " + result);
            return result;
        } catch (Exception e) {
            Log.e("Get Url", "Error in downloading: " + e.toString());
        }
        return null;
    }

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);

        // TODO change text view id for yourself
        TextView textView = (TextView) findViewById(R.id.textView1);

        // show result in textView
        if (result == null) {
            textView.setText("Error in downloading. Please try again.");
        } else {
            textView.setText(result);
        }

        // close progresses dialog
        dialog.dismiss();
    }
}

and use blow line every time that you want:

new GetStringFromUrl().execute("http://www.google.com/");

by helping @Leandros

I had to make 'textView' a member of the class and link it through the constructor, because 'findViewById' is not accessable in a AsyncTask. For the rest, works like a charm! — Jon V, Dec 22 '14 at 14:02

score 2 · Answer 3 · edited May 23 '17 at 12:00

2

The answer posted in here Android Read contents of a URL (content missing after in result) tells you exactly what to do apart from setting the text in a textview

edited May 23 '17 at 12:00

Community

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answered May 23 '11 at 15:39

matsjoe

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How to read text file in android from web?

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