Teams Winter 2011/team5/lab4/tutorial
Revision as of 21:56, 15 April 2011 by Abhatnagar (talk | contribs) (→Step 6 - Click Next and leave the default Java settings as it is)
Step 1 - Download BlackBerry Plug-in for Eclipse and Simulator from here: http://us.blackberry.com/developers/javaappdev/
Step 2 - Download BlackBerry Plug-in for Eclipse and Simulator from here: http://us.blackberry.com/developers/javaappdev/
Step 3 - Unzip the package in a location like: .../eclipse/mobile/blackberry
Step 4 - Start Eclipse, and Go to File > New > BlackBerry Project
== Step 5 - Enter the Project Name and ensure the project specific JRE selected is BlackBerry JRE.
Click next ==
Step 6 - Click Next and leave the default Java settings as it is
Step 7 - Click Next and select an Empty Application to start developing
Step 8 - Click Finish and on the Application Tab, enter the Title for your application
Step 9 - Expand the file structure in the Package Explorer window and examine the structure already created for you
Step 10 - src folder will contain your package(s) and all your application code files.
Step 11 - res folder is the resources folder which can contain additional resources your app might use - like images, audio or video files, or the app icon
Step 12 - Expand your src folder and double click the .java file to begin editing
Step 13 - It will look like it does in the screenshot above. It will have to be edited to make it the start screen where you app starts
Step 14 - This is done by extending UiApplication class, which will co-ordinate the screen that is currently on top of the screen stack
Step 15 - We have also added some code to create a new instance of the application and make the currently running thread the application's event dispatch thread in the main function
Step 16 - In the constructor of the App's main class file, we push a new screen onto the top of the screen stack
Step 17 - The name of the new class created, which will be the first screen of the app is specificed int he pushScreen method
Step 18 - Right click the package, and create a new Class, called MyScreen
Step 19 - MyScreen will be the first screen of the app and here we can configure a screen title and anything else we want to start the app with
Step 20 - In this tutorial, we create a button, defined as an instance variable of the MyScreen class
Step 21 - We set the current class to be the listener for any changes in the state of this button and assign it a title
Step 22 - The button is added to the screen, which is a UiApplication object
Step 23 - In the field changed method, we push another screen into view when the button is pressed
Step 24 - The LocationTracker class is pushed into view and so it also extends the MainScreen class
Step 25 - To get the location of the user in the LocationTracker class, we need to have a class that gets the users location
Step 26 - The MyLocationListener class implements LocationListener, so the class can be notified as the users location is updated
Step 27 - The locationUpdated method gets the latitude and the logitude of the user and saves then in two instance variables of the MyScreen class
Step 28 - In the LocationTracker class, we define some RichTextFields to output the collected value of the latitude and longitude
Step 29 - We also create a BitMap object and configure its weight and height using the methods defined in the BlackBerry docs
Step 30 - The BitMap object, SeparatorField object and RadioButtonField objects are added to the screen
Step 31 - We add a new button that will process the results of the radioButtons
Step 32 - The button's field change listener method is coded to alert the user based on their radiobutton value selected
Step 33 - Import all required packages and resolve anyother warnings suggested by Eclipse
Step 34 - Once all errors are resolved, Click on Run, go to Run as and then BlackBerry Simulator
Step 35 - Expand on the apps in the simulator, and select the app just created
