Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Read Image - JavaME

Posted on 2011-02-13
20
Medium Priority
?
328 Views
Last Modified: 2013-11-24
What other api can i use to create images beside createimage? I am using Blackberry and J2ME.

Image image = Image.createImage(input);
0
Comment
Question by:bbdriver
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 10
  • 8
20 Comments
 
LVL 92

Expert Comment

by:objects
ID: 34885444
what problem are you having with createImage()?
Whats 'input'?
0
 

Author Comment

by:bbdriver
ID: 34885674
input is InputStream input = filenames.openInputStream();      

I have a set of images, when i use createImage(), it either returns the created image or throws IOException, Exception. But there are some images that doesn't go anywhere. I thought there might be other api that i can try out.
0
 
LVL 92

Expert Comment

by:objects
ID: 34885683
none that I'm aware of.
0
The top UI technologies you need to be aware of

An important part of the job as a front-end developer is to stay up to date and in contact with new tools, trends and workflows. That’s why you cannot miss this upcoming webinar to explore the latest trends in UI technologies!

 

Author Comment

by:bbdriver
ID: 34885691
Do you have any idea why the program will stop when i try to use createImage() without throwing any exception?
0
 

Author Comment

by:bbdriver
ID: 34885730
I am able to open it in phone imageviewer but it can't be processed using my program.
0
 
LVL 92

Expert Comment

by:objects
ID: 34885751
could be a deadlock, hard to say without see your code
0
 

Author Comment

by:bbdriver
ID: 34885760
This is the code.

FileConnection filenames = (FileConnection)Connector.open(main_directory +  "testFolder" + "/"
                                                + imageName ,Connector.READ);
if (filenames.exists()) { InputStream input = filenames.openInputStream();      
try {      Image image = Image.createImage(input);            
if(image != null){               
                                                      updateContent("READING: " + imageName);
                                                }
                                                else continue;                  
                                          }
                              
                                          catch (IOException e) {                                                
                                                updateContent("READING: " + imageName);                                                

                                          } catch (Exception e)  {
                                                updateContent("READING: " + imageName);      

                                          }
                                          input.close();      
                                    }
                                    filenames.close();
0
 

Author Comment

by:bbdriver
ID: 34885788
public void image()
            { for(;;)
                  {
                        String content = "", description = null, Exceptiondescription=null;
                        JSONObject outer = new JSONObject();            

                        try{
                              FileConnection fc = (FileConnection)Connector.open(main_directory + imageFolder + "/");
                              FileConnection file = (FileConnection)Connector.open(main_directory + imageFolder + ".json" ,Connector.READ_WRITE);                              
                              if(!file.exists()) { file.create(); }
                              file.setWritable(true);
                              OutputStream out = file.openOutputStream();
                              Enumeration filelist = fc.list("*", true);
                              while(filelist.hasMoreElements()) {
                                    imageName = (String) filelist.nextElement();
                                    FileConnection filenames = (FileConnection)Connector.open(main_directory + imageFolder + "/"
                                                + imageName ,Connector.READ);
                                    if (filenames.exists()) {
                                          InputStream input = filenames.openInputStream();      
                                          try {
                                                Image image = Image.createImage(input);
                                                if(image != null){
                                                      toJSON(outer, "OK", "filename:" + imageName);  
                                                }
                                                else continue;                                                
                                          }
                                          catch (IOException e) {
                                                description = e.toString();
                                                toJSON(outer,"Caught IOException:" + description, "filename:" + imageName);
                                                

                                          } catch (Exception e)  {
                                                Exceptiondescription = e.toString();
                                                toJSON(outer, " Caught Exception:" + Exceptiondescription, "filename:" + imageName);
                                          }                                    
                                          input.close();      
                                    }
                                    filenames.close();
                              }      
                              file.close();
                              fc.close();
                              out.write(outer.toString().getBytes());
                              out.flush();
                              out.close();                                          
                              updateContent("READING: " + "COMPLETED");                   
                        }                                          
                        catch (IOCancelledException e)
                        {
                              System.out.println(e.toString());
                              return;
                        }
                        catch (IOException e)
                        {
                              errorDialog("IO EXCEPTION: " + e.toString());
                              return;
                        }      
                        catch(Exception e){
                              errorDialog("EXCEPTION" + e.toString() );
                        }                  
                  }
            }
0
 

Author Comment

by:bbdriver
ID: 34885846
I am not sure if it's deadlock. It doesn't look like it.
0
 
LVL 92

Expert Comment

by:objects
ID: 34885909
you repeatedly read the same directory
and if you get an exception you don't close the connections or streams
not sure if thats the cause but worth fixing up
0
 

Author Comment

by:bbdriver
ID: 34885994
Does it mean that each time I get an exception, i will have to close the connection? Cause, if i close the connection, i wont be able to continue reading the next image file.
0
 
LVL 92

Expert Comment

by:objects
ID: 34886012
If you get an exception, you try and open the connection again
0
 

Author Comment

by:bbdriver
ID: 34886064
I have tried that and got FileIOException,

I am  trying this..


try {
                                                updateContent("" + input);
                                                Logger.logEventInfo("READING1: " + imageName);
                                                Image image = Image.createImage(input);            
                                                Logger.logEventInfo("READING2: " + imageName);
                                                if(image != null){

                                                      updateContent("READING3: " + imageName);
                                                      toJSON(outer, "OK", "filename:" + imageName);
                                                }
                                                else continue;                                
                                          }                              
                                          catch (IOException e) {
                                          description = e.toString();
                                                updateContent("READING: " + imageName);
                                                Logger.logEventInfo("READING4: " + imageName +"\n");
                                                toJSON(outer, "Caught IOException:" + description, "filename:" + imageName);
                                                
                                          } catch (Exception e)  {

                                                Exceptiondescription = e.toString();
                                                updateContent("READING: " + imageName);      
                                                Logger.logEventInfo("READING5: " + imageName);
                                                toJSON(outer," Caught Exception:" + Exceptiondescription, "filename:" + imageName);
                                          }      
                                          input.close();      
                                    }
                                    filenames.close();


This is what I have in print statement. And when it reach to image3, it will stop.

I: List of files and directories under SD CARD:
I: READING1: image1.jpg
I: READING2: image1.jpg
I: READING1: image2.jpg
I: READING4: image2.jpg
I: READING1: image3.jpg
0
 
LVL 92

Expert Comment

by:objects
ID: 34886100
log details of the exception to help determine why an exception  is occurring

are you sure it hung and that that it isn't just exitting the method?
0
 

Author Comment

by:bbdriver
ID: 34886156
I don't think it's exiting the method. How do I log the detail of exception?
0
 
LVL 92

Expert Comment

by:objects
ID: 34892133
> I don't think it's exiting the method.

add some logging to check

> How do I log the detail of exception?

log the exception including preferably the stack trace
0
 

Accepted Solution

by:
bbdriver earned 0 total points
ID: 34894167
Hi.. i think i got it. I have changed Image image = Image.createImage(input); to byte[] b3=str.getBytes();
                                                Image image = Image.createImage(b3, 0, 0);

And it works now. I think there are is some issue with just create image with input stream.
0
 
LVL 92

Expert Comment

by:objects
ID: 34902211
may have been a problem with the input stream,
0
 
LVL 60

Expert Comment

by:Kevin Cross
ID: 37514365
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

By the end of 1980s, object oriented programming using languages like C++, Simula69 and ObjectPascal gained momentum. It looked like programmers finally found the perfect language. C++ successfully combined the object oriented principles of Simula w…
I felt secure communicating on the BBM... Till some time back!! It was probably the fact that the BBM messages do not travel over the internet was making me feel 'secure' about it, or was it the fact that BBM only works on a BlackBerry Devices a…
The viewer will learn how to implement Singleton Design Pattern in Java.
This tutorial covers a step-by-step guide to install VisualVM launcher in eclipse.
Suggested Courses

670 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question