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WeatherApp is a simple weather application showing a four-day forecast with temperatures, relative humidity, wind speed, and wind direction. The application retrieves the current location via cell ID or GPS or a user-defined location and uses it to retrieve the weather forecast.

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WeatherApp is a simple weather application showing a four-day forecast with temperatures, relative humidity, wind speed, and wind direction. The application retrieves the current location via CellID or GPS or a user-defined location and uses it to retrieve the weather forecast. APIs are used for both weather data and location search data. The application uses the library for parsing JSON. The application has been designed to work Nokia Asha software platform 1.0 and on various Series 40 devices with different form factors and input methods.

WeatherApp introduces in-app advertising in form of banners and fullscreen ads. In-app advertiseming generates better revenue for your application. All the ads are provided by Inneractive.

This example demonstrates:

  • Integration of in-app advertising
  • Supporting different locationing methods on a range of devices
  • Using JSON-based web services

The application is hosted in GitHub:

For more information on the implementation, visit Java Developer's Library:!code-examples/location-services-weatherapp.html

1. Prerequisites

  • Java ME basics
  • Java ME threads and timers

2. Important files and classes

  • src\..\views\
  • src\..\views\
  • src\..\network\
  • src\..\network\
  • src\..\location\
  • src\..\location\
  • src\..\orientation\
  • src\..\ads\

Classes: JSONObject, LocationProvider, LocationUtil, IADView

3. Design considerations

WeatherApp has been designed to scale across a range of Nokia Asha and Series 40 devices. The graphics are available in two sizes and there are three different layouts for different screen sizes. Layouts have been tested to scale on the following screen resolutions: 128x160, 240x320, 320x240, 240x400, 400x240, 360x640, 640x360, and 640x480.

The MIDlet uses the fastest available positioning method, starting with cell ID positioning. If cell ID positioning cannot be used, the MIDlet tries to retrieve the location using GPS. If GPS is not available either, the user can enter the location manually through the location search. The location search supports auto-complete. The MIDlet has been designed so that missing location APIs do not cause any errors: even if the device supports no location APIs, the MIDlet still runs gracefully. APIs are used for both weather data and location search data. Due to licencing terms, the API key is not published in the source code of this application. If you compile the application from the sources, the application is run in test mode without the WorldWeatherOnline key. In the test mode the application uses a static example forecast data instead of a real forecast.

In-app advertising required some modifications to the layout, since the banners need some extra space. Unfortunately the layout that had been serving all the different screen resolution did not work anymore, so an additional layout had to be designed for landscape. Banners also need to be clickable. On a touch device it is easy just to tap the banner, but non-touch devices also require focus handling, which allows the user to select the banner and then click it.

4. Known issues

  • When mist, fog, or black clouds are forecast, the visual style always follows the day mode.
  • On some devices, network access is set to "ask always" by default. On Nokia Asha software platform, the setting can be changed from Settings > Installed apps > WeatherApp > Permissions. On Series 40 devices, scroll down to the MIDlet in question and selecting files > my apps Options > Application access.

5. Build and installation instructions

The example has been created with NetBeans 6.9.1 and Nokia Asha SDK 1.0. The project can be easily opened in NetBeans by selecting 'Open Project' from the File menu and selecting the application.

Before opening the project, make sure the Nokia Asha SDK 1.0 or newer is installed and added to NetBeans. Building is done by selecting 'Build main project'. Also make sure the JAR files inside the lib folder are included into the project (properties -> Libraries & Resources -> Add Jar/Zip).

You can install the application on a phone by transfering the JAR file with Nokia Suite or over Bluetooth.

The example can also be built and run with Nokia IDE.

6. Running the example

The application requires a network connection to work. When the application starts, the user will in most cases be prompted to retrieve the current location and to use network connection. If there are no means for positioning, the user will be redirected to recently used locations. On the first run there are no recent locations, so a search view will be opened instead.

After the location-based or user-defined location has been specified, the application tries to retrieve the weather forecast for the next four days. Days can be browsed left and right using the arrows or by flicking horizontally. Also navi keys can be used if the phone has those.

The user can change the location any time by opening the Location view and selecting any of the previously used locations or search for a new location.

The application also supports regional settings for temperature and wind speed.

A banner ad is shown for 60 seconds and then changed to a new one. A full-screen ad is shown when the user is about to exit the application.

7. Compatibility

Nokia Asha software platform 1.0 and Series 40 3rd Edition phones and newer.

Note that the device needs to support the maximum Java heap size and a JAR file size of at least 1 MB. Network connectivity is also required.

Tested on:

  • Nokia X3-02 (Series 40 6th Edition FP1)
  • Nokia Asha 200 (Java Runtime 1.1.0 for Series 40)
  • Nokia Asha 302 (Java Runtime 1.1.0 for Series 40)
  • Nokia Asha 303 (Java Runtime 1.1.0 for Series 40)
  • Nokia Asha 306 (Java Runtime 2.0.0 for Series 40)
  • Nokia Asha 311 (Java Runtime 2.0.0 for Series 40)
  • Nokia Asha 501 (Nokia Asha software platform 1.0)

Developed with:

  • Netbeans 7.3
  • Nokia Asha SDK 1.0
  • Inneractive Ad SDK v1.0.9 for J2ME

8. Version history

  • 1.5 NAX replaced by Inneractive
  • 1.4 Minor stability fixes.
  • 1.3 Example ported to Nokia Asha devices. Inneractive plugin updated and worldweatheronline links updated.
  • 1.2 Orientation support and optimisation done for Series 40 full touch devices, updated Ad SDK, fixed Symbian related issues
  • 1.1 Added in-app advertisement, fixed Symbian related issues and some memory issues
  • 1.0 The first version published at
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