Java Development

[Blanc]

Hi all, am trying to create a bitmap image using EncodedImage.createEncodedImage(, , ,);

but it is throwing illegal argument exception... meaning that the byte data it is taking is of unknown format, but am collecting this data from a .png file, on the SDCard of the device.

can anyone check this code and tell where am wrong?

public void addImage(String _filePath)
    {
     	ByteArrayInputStream byteInputStream;
    	InputStream iStream = null;
    	FileConnection conn = null;
    	String URI = "file:///"+_filePath;
//    	byte []byteStream;
    	// opening connection to the selected location 
    	try 
    	{
    		add(new LabelField("befor opening conn"));
			conn = (FileConnection)Connector.open(URI);
			if(conn != null)
				add(new LabelField("after opening conn, conn estblshd"));
			iStream =  conn.openDataInputStream();
//			String str = iStream.toString();
// 			byteStream = str.getBytes();
			int bytesRead=0;
			int bytesToRead=1024;
			byte[] input = new byte[bytesToRead];
			
			if( iStream != null)
			{
				add(new LabelField("before while, and iStream != null"));
			while (bytesRead < bytesToRead)
			{
			  int result = iStream.read(input, bytesRead, bytesToRead - bytesRead);
			  if (result == -1) break;
			  bytesRead += result;
			}
			}
			if( input != null)
			{
				add(new LabelField("input != null"));
				EncodedImage eiImage = EncodedImage.createEncodedImage(input, 0, input.length); /// error here.... 
 				if( eiImage != null)
				{
					add(new LabelField("eiImage != null"));
					Bitmap bmp = eiImage.getBitmap();
					BitmapField bmpField = new BitmapField(bmp);
					if( bmpField != null)
						this.add(bmpField);
					else
						this.add(new LabelField("bmp is null"));
				}
				
			}
			
			updateLayout();
 		}
    	catch (IOException e) 
    	{
			System.out.println("IOException:"+e.getMessage());
			add(new LabelField("IOException:"+e.getMessage()));
		}
    	finally
    	{
    		if( conn!= null)
				try {
					conn.close();
				} catch (IOException e) {
					add(new LabelField("IOException:"+e.getMessage()));
					e.printStackTrace();
				}
    		if(iStream != null)
				try {
					iStream.close();
				} catch (IOException e) {
					add(new LabelField("IOException:"+e.getMessage()));
					e.printStackTrace();
				}
    	}

i found from debugging, that input stream is creating, but the error is throwing while the creation of the EncodedImage.

plzzzz help.....

[peter_strange]

My response on this Thread applies here too:

http://supportforums.blackberry.com/t5/Java-Development/PNGEncodedImage-getBitmapImpl-gt-IllegalArgu...

Until you are 100% positive that the data you have on the BlackBerry is the same as the data you have on the Server, there is no point looking anyone any further at this problem. 

[Blanc]

hi, just to update... i tried with the following piece of code also, but the same result..... someone helppppp

		Bitmap bmp = Bitmap.createBitmapFromBytes(input, 0, -1,1);

[CMY]

Why do you have the bytesToRead hard-coded? You are only reading 1K of data no matter how large your PNG is which is probably why the file data is incorrect. Why not get the bytes to read from the filesize?

[Blanc]

the data is not from teh server, i copied a .png file from my PC to the SDCard. in my app, the file  is recognizing as .png even. so there might be no chance for  data corruption....

[peter_strange]

"i copied a .png file from my PC to the SDCard"

Apologies, missed that.

CMY didn't and I think he has spotted your bug.

[Blanc]

but what is  the solution!!!!????  I tested in teh device also, it is throwing the same exception.

Originally my task is to browse an image, from the device and display it on the  screen. For this i used FilePickerDemo to browse for the files, and extended my functionality of creating a bitmap from the file path picked from the file browser.

Is there any other alternative to achieve this? or kindly suggest me how to fix this?

[CMY · Accepted solution]

Try replacing

   bytesToRead = 1024;

with

   bytesToRead = conn.fileSize();

[Blanc]

Excellent!!! working like a charm.... Thanks a lot !!!!