Difference between revisions of "BlackBerry Concepts"
(/* Configuring the Project UI) |
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Base class for all device applications that provide a user interface. | Base class for all device applications that provide a user interface. | ||
| − | * A UI application maintains a stack of Screen objects. As it pushes screens onto the stack, it draws them on top of any other screens already on the stack. When the application pops a screen off the stack, it redraws the underlying screens as necessary. Only the screen on the top of the stack receives input events. | + | * A UI application maintains a stack of Screen objects. |
| + | As it pushes screens onto the stack, it draws them on top of any other screens already on the stack. | ||
| + | When the application pops a screen off the stack, | ||
| + | it redraws the underlying screens as necessary. | ||
| + | Only the screen on the top of the stack receives input events. | ||
| − | * Each screen may appear only once in the display stack. The application throws a runtime exception if you attempt to push a single screen onto the stack more than once. | + | * Each screen may appear only once in the display stack. |
| + | The application throws a runtime exception | ||
| + | if you attempt to push a single screen onto the stack more than once. | ||
| − | Note that a UI application must follow rules similar to those of traditional Swing applications. | + | Note that a UI application must follow rules similar |
| + | to those of traditional Swing applications. | ||
|} | |} | ||
Revision as of 00:47, 22 February 2011
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Development Environment for BlackBerry Applications using Java
This is a practical introduction of steps for building a BlackBerry apps using Eclipse IDE. (Alan Wong - January 13, 2011).
| Steps | Actions |
|---|---|
 |
Install, Configuration, Check |
 |
BlackBerry Java Plug-in for Eclipse |
 |
The goals of the Project is to create an Application that:
|
Configuring the Project
| Steps | Actions |
|---|---|
 |
<Properties ModelVersion="1.1.2">
<General Title="Hello World Demo" Version="0.9" Vendor="Research In Motion Ltd." Description=""/>
<Application Type="BlackBerry Application" MainMIDletName="" MainArgs="" HomeScreenPosition="0" StartupTier="7" IsSystemModule="false" IsAutostartup="false"/>
<Resources hasTitleResource="false" TitleResourceBundleName="" TitleResourceBundleRelativePath="" TitleResourceBundleClassName="" TitleResourceBundleKey="" DescriptionId="">
<Icons>
<Icon CanonicalFileName="res\img\helloworld_jde.png" IsFocus="false"/>
</Icons>
</Resources>
<Compile OutputCompilerMessages="false" ConvertImages="true" CreateWarningForNoExportedRoutine="true" CompressResources="false">
<PreprocessorDefines/>
</Compile>
<Packaging OutputFileName="HelloWorldDemo" OutputFolder="deliverables" PreBuildStep="" PostBuildStep="" CleanStep="" GenerateALXFile="true">
<AlxFiles/>
</Packaging>
<HiddenProperties>
<ClassProtection/>
<PackageProtection/>
</HiddenProperties>
<AlternateEntryPoints/>
</Properties> |
 |
This class extends the UiApplication class, providing a graphical user interface. |
 |
UiApplication
Base class for all device applications that provide a user interface.
As it pushes screens onto the stack, it draws them on top of any other screens already on the stack. When the application pops a screen off the stack, it redraws the underlying screens as necessary. Only the screen on the top of the stack receives input events.
The application throws a runtime exception if you attempt to push a single screen onto the stack more than once. Note that a UI application must follow rules similar to those of traditional Swing applications. |
