how to download text from web in android?

i am new to android and dont know much .i need help to change this code . i want to download some text from a website. if i use the code: new DownloadTextTask().execute("http://www.test.com/"); it doesnt show the downloaded text in TextView but if i reopen the app i can see the test. i think its because its asyncrounous. and it has delay to download text.

how can i fix this . or just use this code instead: (i mean using DownloadText() function directly! it didnt work when i tried!)

TextView txt = (TextView)findViewById(R.id.textTest);        
txt.setText(DownloadText("http://www.test.com/"));

All the codes :

public class MainActivity extends AppCompatActivity {

public InputStream OpenHttpConnection(String urlString) throws IOException
{
    InputStream in = null;
    int response = -1;
    URL url = new URL(urlString);
    URLConnection conn = url.openConnection();
    if (!(conn instanceof HttpURLConnection))
        throw new IOException("Not an HTTP connection");
    try{
        HttpURLConnection httpConn = (HttpURLConnection) conn;
        httpConn.setAllowUserInteraction(false);
        httpConn.setInstanceFollowRedirects(true);
        httpConn.setRequestMethod("GET");
        httpConn.connect();
        response = httpConn.getResponseCode();
        if (response == HttpURLConnection.HTTP_OK) {
            in = httpConn.getInputStream();
        }
    }
    catch (Exception ex)
    {
        Log.d("MainActivity", ex.getLocalizedMessage());
        throw new IOException("Error connecting");
    }
    return in;
}


public String DownloadText(String URL)
{
    int BUFFER_SIZE = 2000;
    InputStream in = null;
    try {
        in = OpenHttpConnection(URL);
    } catch (IOException e) {
        Log.d("MainActivity", e.getLocalizedMessage());
        return "";
    }
    InputStreamReader isr = new InputStreamReader(in);
    int charRead;
    String str = "";
    char[] inputBuffer = new char[BUFFER_SIZE];
    try {
        while ((charRead = isr.read(inputBuffer))>0) {

//---convert the chars to a String--- String readString = String.copyValueOf(inputBuffer, 0, charRead); str += readString; inputBuffer = new char[BUFFER_SIZE]; } in.close(); } catch (IOException e) { Log.d("MainActivity", e.getLocalizedMessage()); return ""; } return str; }

private class DownloadTextTask extends AsyncTask {

    protected String doInBackground(String... urls) {
        return DownloadText(urls[0]);
    }
    @Override
    protected void onPostExecute(String result) {
        Toast.makeText(getBaseContext(), result, Toast.LENGTH_LONG).show();

    }

}

public static class xmlClass
{
    public static String xml ="";
}



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //new DownloadTextTask().execute("http://www.test.com/");

    TextView txt = (TextView)findViewById(R.id.textTest);
    txt.setText(DownloadText("http://www.test.com/"));

}

}