How to detect that any blackberry application is screen density supportive or not? - blackberry

I want to develop one application which I will install on my Bold Device.now is it possible for my application to retrieve information regarding application which are installed on my device that these applications can be installed on other devices like Torch/Storm/Tablet phones of blackberry. is it possible? Thanks in advance

Even Java API, with richer than Web-SDK functionality, does not provide such information about installed applications. To inspect all possible actions over installed apps look at CodeModuleManager and ApplicationManager classes from RIM API SDK.

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What API/SDK to print automatically to thermal printer (e.g. Brother QL) with my React Native iPhone app without interaction?

I've been looking into different API/SDKs that would be best and easiest to integrate with my React Native iPhone app. This is an internal employee app, that once a form is submitted I would like to automatically print out a label from a thermal printer (e.g. Brother QL1110NWB).
Some options I found are:
React Native:
https://github.com/christopherdro/react-native-print
Brother SDK:
https://support.brother.com/g/s/es/htmldoc/mobilesdk/
Apple AirPrint:
https://developer.apple.com/documentation/uikit/uiprintinteractioncontroller#//apple_ref/doc/uid/TP40010141-CH1-SW34
Does anyone have experience with any of these API/SDKs and can recommend best method for easy integration and be able to print directly without interaction?
Thank you!
If you can dictate the hardware to make sure it is compatible, then the Brother SDK will have the easiest integration and be transparent to the user.
Apple restricts Bluetooth Classic devices from connecting to iOS unless they are MFi certified, which adds to the price but enables the External Accessory Framework at the OS level. Device manufacturers can then sell a printer that is 'iOS certified' like the Brother QL1110NWB and provide the SDK to use it.
How to use bluetooth classic instead of le
You would need to write a React Native binding for each target device family to use the SDK's OS specific libraries. Brother has an iOS, Android and Xamarin SDK available, but I don't see one for React, so you would need to wrap their iOS SDK with hooks to invoke your print on demand. Before you start, contact Brother support or your sales rep, because they may be working on React Native SDK, or your organization may have enough buying power to request one. Either way, it's a good practice to make this an interface at the base React level so that new printers or platforms can be added just by implementing custom native device adapters.

How to prepare old Blackberry app for BlackBerry 10?

We have a couple of Blackberry apps and are now trying to prepare them for BB 10. These apps are made in Java via Eclipse and/or RIM IDE tool. However, when I went to https://developer.blackberry.com/platforms/bb10, I saw that there is no even a mention of Java SDK. Take a look at image below.
So how am I supposed to update Blackberry app to BB 10? Any ideas?
You have to decide what to do with your applications. If you have an Android version, one option is to repackage the APK to a BAR using the provided tool set so that it will run under the Android player. There are many good Android applications that provide an acceptable or even good user experience this way. Another option is to port your BlackBerry Java application to Android (if there is no existing Android version) then package the Android version for the player. This would also allow you to market the application to Android users. The final option is to port the BlackBerry Java applications to the Native SDK, Cascades, HTML5 or Adobe Air.
The best way forward depends on how tightly integrated into the BB10 system you want to be. While there are facilities provided in BB10 that are the equivalents to those is BlackBerry OS, there have been significant changes required to enable the improvements everyone wants to see on the new platform. If you see BB10 as a significant part of your future business then porting to Cascades would be very worth while.

Will blackberry smartphone apps run on the Playbook?

Will a Blackberry smartphone application written in the Java api work on the Playbook without modification?
According to RIM, once the JDE player is released, they will have to be re-packaged which may require re-compiling, to run on the PlayBook. The same applies to Android applications. In either case you will not be able to download native JDE or Android apps and run them on the PlayBook.
The only application SDK path that allows for BlackBerry Smartphone applications to run both on BBOS, Playbook and BlackBerry 10 is the HTML5 WebWorks SDK
Get started by reading the Getting Started Overview Guide
https://developer.blackberry.com/html5/documentation/what_is_a_webworks_app_1845471_11.html
You may also be interested in cloning bbUI.js, a free ui framework that works across BlackBerry devices going back to OS5. bbUI.js targets platform specific native features, like access to hardware apis, while providing a consistent feel.
blackberry/bbUI.js
https://github.com/blackberry/bbUI.js
Best of luck to you.
Yes, RIM has announced that they will release a virtual machine which will play your existing blackberry app. I'm not sure if developers have to re-submit their blackberry apps though.
Playbook will also support Android apps, but developers will have to recompile their apps and submit those to App World.

Application Details on Blackberry

I want to develop an application which gets the details of other installed applications on Blackberry. Is there any possibility?
Yes, you can use CodeModuleGroupManager.loadAll() to get a list of all applications installed on the device.

what models/OS of BlackBerry phones widely used in the world?

I want to develop a BlackBerry Application.
but i am somewhat confuse bcoz there are a lots of models/OS available in BlackBerry phones.
So can any one have any idea/servey that the most popular model/OS in BlackBerry phones.
So i can develop a application for as many users as possible...
or tell me if any generalize sollution is available...
Thanking in advance...
I you haven't done so already you should visit :
http://na.blackberry.com/eng/developers/
Java seems to be the development standard on BlackBerry phones
Java 5.0 : The new gold standard for
Java® development on the BlackBerry
Application Platform.
You'll get all the information you need on their developers' site.
They also provide simulators per blackberry model.
Hope this helps
The 8520 is the #1 BlackBerry handset in South Africa. I guess it depends on the country.
Have a look at Admob's Metrics that they release detailing different top handsets in different segments.
WorldWide it's: BlackBerry 8700, BlackBerry 8100 and then the BlackBerry 8830 according to their data.
Also check Opera Mini's stats.

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