Solved

Read Image - JavaME

Posted on 2011-02-13
20
316 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
Salesforce Made Easy to Use

On-screen guidance at the moment of need enables you & your employees to focus on the core, you can now boost your adoption rates swiftly and simply with one easy tool.

 

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

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Suggested Solutions

This article will help those of you having problems with the Nextel Blackberry 8350i.  Recent Software updates cause the problems issues described below, and this article will help you revert back to the older software. As we know, Nextel has alw…
Introduction This article is the last of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers our test design approach and then goes through a simple test case example, how …
Viewers will learn about the regular for loop in Java and how to use it. Definition: Break the for loop down into 3 parts: Syntax when using for loops: Example using a for loop:
This theoretical tutorial explains exceptions, reasons for exceptions, different categories of exception and exception hierarchy.
Suggested Courses

751 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