Wrong exit from text file

I´d as read a SD card text file and display the contents.

The content of the file:

Archer 1
Archer 2
Archer 3
Archer 4

my code:

        try {
            FileConnection con = (FileConnection) javax.microedition.io.Connector.open("file:///SDCard/test.txt");
            if(con.exists())
            {
                InputStream input = con.openInputStream();
                StringBuffer buffer = new StringBuffer();
                while(input.read() != -1)
                {
                    buffer.append(input.read());
                }
                showMessage("OutPut: "+buffer.toString());
            }
        } catch (IOException e) {
            showMessage("Es ist ein Fehler aufgetreten.");
        }

And the output is:

11410411449101141041145010114104114511011410411452

What should be changed?

The problem is that you read the file in bytes and the StringBuffer does not accept the bytes as something that you can add. Therefore, it is interpretting the byte value read from the InputStream as an integer.

Here are two quick fixes on top of my head, I have not tested this code. One reads the InputStream using an InputStreamReader that can give you the contents of the file as an array of char that can be added directly to the StringBuffer. The second way still reads the file as bytes but then uses the StringUtilities class to add the array of bytes to the StringBuffer.

try
{
    FileConnection con = (FileConnection) javax.microedition.io.Connector.open("file:///SDCard/test.txt");
    if(con.exists())
    {
        InputStream input = con.openInputStream();
        InputStreamReader reader = new InputStreamReader(input);
        StringBuffer buffer = new StringBuffer();

        char[] charBuffer = new char[1024 * 8];
        int lengthRead;
        while ((lengthRead = reader.read(charBuffer, 0, charBuffer.length)) > 0)
        {
            buffer.append(charBuffer, 0, lengthRead);
        }
        showMessage("OutPut: "+buffer.toString());
    }
}
catch (IOException e)
{
    showMessage("Es ist ein Fehler aufgetreten.");
}

try
{
    FileConnection con = (FileConnection) javax.microedition.io.Connector.open("file:///SDCard/test.txt");
    if(con.exists())
    {
        InputStream input = con.openInputStream();
        StringBuffer buffer = new StringBuffer();

        byte[] byteBuffer = new byte[1024 * 8];
        int lengthRead;
        while ((lengthRead = input.read(byteBuffer, 0, byteBuffer.length)) > 0)
        {
            StringUtilities.append(buffer, byteBuffer, 0, lengthRead);
        }
        showMessage("OutPut: "+buffer.toString());
    }
}
catch (IOException e)
{
    showMessage("Es ist ein Fehler aufgetreten.");
}

Tags: BlackBerry Developers

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