问题
I downloaded the Eclipse plugin for BlackBerry which has the BlackBerry OS 7 runtime by default. I need to target BlackBerry OS 6 and OS 7 devices. Will this work for BlackBerry OS 6 as well, or do I need to change the the JRE? If I need change the JRE, how do I do that?
回答1:
What you have already downloaded will be fine for developing for BlackBerry OS 7. However, to also develop for OS 6 devices, you should install the OS 6.0 plugin SDK, too.
Currently, this blackberry.com page describes the general process you'll need to follow:
- In Eclipse, select Help -> Install New Software.
- Then click the Add... button to add a new software update site, if the BlackBerry site is not already available to Work with.
- Enter the URL for the BlackBerry site ( http://www.blackberry.com/go/eclipseUpdate/mac/java for OS X and http://www.blackberry.com/developers/jar/win/java for Windows )
- If you then select the BlackBerry update site, you should see a category of updates named BlackBerry Java Plug-In Category, or something similar. Expand that, and you should be able to install the 7.1, 7.0, 6.0, or 5.0 SDKs.
Install all the SDKs whose devices you might want to target as minimum versions for your apps. On Windows, choosing a particular JRE version also gives you at least one simulator that runs that version of BlackBerry smartphone software (Mac OS X SDKs don't support simulators, though).
Once you have a BlackBerry Eclipse project, you will then be able to pick which SDK version you build against. This will be the minimum version that the app will support.
- Right click the Project in the Eclipse Package Explorer, and select Properties.
- There, you can see the Java Build Path properties, which specify which minimum JRE (OS) version you are targeting.
- Then, on the Libraries tab, you can Remove the current JRE (OS) version, and replace it with another one by selecting Add Library, then JRE System Library.
- Pick Alternate JRE and you should be able to choose from any JRE version whose plugin you installed in the first few steps of these instructions.
That's all!
来源：https://stackoverflow.com/questions/12296770/which-version-of-blackberry-jre-is-required-for-developing-blackberry-os6