blackberry

问题 I am trying to save some files on micro SDCard. To check the availability of SDCard, I am using the following method; private boolean isSdCardReady() { Enumeration e = FileSystemRegistry.listRoots(); while (e.hasMoreElements()) { if (e.nextElement().toString().equalsIgnoreCase("sdcard/")) { return true; } } return false; } Even if this method returns true, when I try to save files, it gives exception net.rim.device.api.io.file.FileIOException: File system is not ready . What does this means?

问题 I wrote a function which returns a string. And there is a Thread implementation the function, like follows, and I am calling [metaDataTrimmed = getMetaData(url);] this function and store the return value to a string value. My problem is the the function immediately returns the null string, which is its initial value. And I checked my function works properly. So I try for a Thread.sleep() method using a dirtybit and also tried for Thread.join(). Is there any standard method in BlackBerry to

问题 I am working on application that tracks the InComing/Outgoing calls & save calls records into Database. Yesterday I seen a scenario In which application is terminated by OS & a warning message pops Up (Error: Application is not responding) . After application is terminated by OS. Application is not able to listen In Coming/Outgoing calls again. I think, Application Phone Listener is unregistered by abnormal application termination. Os calls System.Exit(0) for application termination If I

问题 I'm trying to make a version of my website optimize to Blackberry devices, however I lack of information regarding this devices and google seems not to be helping. Have anyone create website optimize for blackberry before? or know any kind of post or information that could help? I don't know if media queries could help since those devices seems to open screen standard resolutions. 回答1: From Optimizing A Web Site For BlackBerry Devices : If you thought targeting Web sites to work with several

问题 I have a list field with multiple items. I want to select one item from list and drag and drop to another item in the list. After dropping the item on another item the position of items should be interchanged. (Example:- if i select 1st item from list and drag and drop this item to 4th item in list after drop that item position of both item should be changed 1st item on 4th position and 4th item on 1st position) i don't know how to do this.Please help me to complete this task. public class

问题 if i create a text filter in the following manner class AlphaTextFilter extends TextFilter { public char convert(char c, int status) { if (!validate(c)) return 0; return c; } public boolean validate(char c) { return ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')); } } will it work if the code is run on a device with some language other than english...? how can i make a localized....? 回答1: That depends on what your definition of "work" is. If by "work" you mean accepts only [a-zA-Z], then

问题 I am new in blackberry. i create Application now my requirement is when camera is invoke automatic a picture is capture.Is it possible in blackberry. i am using this code every thing work but not capture picture automatic please suggest what i change on my code it's work on my Application. public class Test extends MainScreen implements FileSystemJournalListener { long _lastUSN; ButtonField btnTakePhoto; String capturedImgPath = ""; VideoControl videoControl; Timer objTimer; Player player;

问题 In Blackberry, How to Create Dynamic Layout View which data is parsed and loaded using XML or JSON Parser and Table Layout be like as below ----------------------- image| Text ----------------------- image|Text | image|Text ----------------------- image|Text | image|Text ----------------------- ----------------------- image| Text ----------------------- image|Text | image|Text ----------------------- image|Text | image|Text ----------------------- Please Provide Sample Code 回答1: Take a look

问题 I have an array of horizontal manager which consist of editfield, dropdown, label and a button. I place all these array of horizontalfield manager in one vertical manager to make a table like grid like structure. I can make it but I want to do that if we get focus on horizontal manager then all components in the horizontal manager should give a same color I don't know how to make this. 回答1: If you in 4.5 and lower, extend HorizontalFieldManager, add color property, use it on paint event and

问题 I'm trying to install the latest v5.0.0 "beta 2" BlackBerry OS Component Pack into Eclipse 3.4.2 with BlackBerry Eclipse plugin v1.0.0.67, but have hit a few problems. Has anybody found an easy way to do this? I had no trouble installing the v4.5.0 and v4.7.0 Component Packs. It's rather strange that BlackBerry are shipping new phones with the v5.0.0 OS installed (e.g. a Storm 2 9550 and Bold 9700 that I just bought), and pushing that update to phones whilst the BlackBerry website still