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Asked: 2026-05-23T20:24:04+00:00

One of my activities make a http request to a webservice to get some

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One of my activities make a http request to a webservice to get some weather data when I start the application.

The issue that the activity will take 3-4 seconds to display because of the webservice request. ( Tested on actual device )

I know I m not doing this the right way. All I m doing is on the onCreate method, I m making the request , getting the xml back, parsing and displaying the data.

What is the best way to deal with webservice requests in Android so the application won’t display a white screen while the request is being made? Maybe some threads…….

I know this is not happening on other application I have in my device that make request to get live data.

Notes:

1) The xml I getting back is not that big ( 5 elements with 5 nested elements on each one).

2) I tried with the 3G network and Wifi but the response time is still the same.

sample code:

   @Override
    public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.clock_weather);

   // this is where it is making the request and parsing the xml.
    WeatherSet set = getWeatherCondition("New York, NY");

    TextView currentWeather  = (TextView) findViewById(R.id.current_weather);
    currentWeather.setText("" + set.getWeatherCurrentCondition().getTempFahrenheit());

    TextView currentWeatherH  = (TextView) findViewById(R.id.current_weatherH);
    currentWeatherH.setText("H: " + set.getWeatherForecastConditions().get(0).getTempMaxFahrenheit());

    TextView currentWeatherL  = (TextView) findViewById(R.id.current_weatherL);
    currentWeatherL.setText("L: " + set.getWeatherForecastConditions().get(0).getTempMinFahrenheit());

    ImageView currentWeatherIcon  = (ImageView) findViewById(R.id.current_weather_icon);
    String imageUrl = set.getWeatherCurrentCondition().getIconURL();
    Drawable bitmapDrawable = getImageBitmap(imageUrl);
    currentWeatherIcon.setImageDrawable(bitmapDrawable); 

    setForecastInfo(set, R.id.day1, R.id.day1_icon, R.id.day1_temp, 1  );   
    setForecastInfo(set, R.id.day2, R.id.day2_icon, R.id.day2_temp, 2  );   
    setForecastInfo(set, R.id.day3, R.id.day3_icon, R.id.day3_temp, 3 );    
    setForecastInfo(set, R.id.day4, R.id.day4_icon, R.id.day4_temp, 4  );
}
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1 Answer

  1. Editorial Team

    The time for your response is unpredictable – your network connection can be very poor and take seconds to transfer a few bytes. So the correct way to do this ( as you propose ) is to use thread. In our case android provides very useful class to handle this situations – AsynTask. After you read the docs you will notice that it has 3 very powerful methods that can help you

    1. onPreExecute runs in the ui thread – very helpful to show some spinner or some progress indicator to show the user that you are doing some work in background
    2. doInBackground runs in background – do your background work here
    3. onPostExecute runs in the ui thread– when your are done with your background work hide the progress and update the gui with the newly received data.
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