Manipulation of data and ReadFile

Does anyone know a tutorial readFile manipulation and data?

Utils.blobtoString still not working?

Hello arqlz,

The problem described in this article was due to a blobToString method unheeded at the time. This problem has since been apparently corrected. I just tested the following successfully on my PlayBook example.

Note that before could run this sample, I had to manually create the file expected readme.txt on the PlayBook filesystem under:

\media\downloads\

To complete the above, I went in my PlayBook storage and sharing settings and active file sharing, and the sharing of the Wi - Fi (so I could create the live file on my PC). Then, I created the file manually and it filled with the text:

Hello world!

My file config.xml looks like this.


http://www.w3.org/ns/widgets" xmlns:rim="http://www.blackberry.com/ns/widgets" version="1.0.0">
    Sandbox
    Oros
    
    

    
    

    
        access_shared

Most of this is just a standard configuration.

  • The white list is not mandatory, but it is included by habit.
  • Blackberry.io.file feature > me provides access to readFile and saveFile.
  • The blackberry.utils me gives access to the blobToString and stringToBlob methods.
  • Permission to access_shared ensures that you can access the shared folder on the PlayBook.

My gaze to index.html as follows file.

From top to bottom, a brief description of the main parts:

  • The #log
    take our logging messages so that we can keep track of what's going on.
  • The / * global * / definitions are there just to satisfy JSLint. Basically, he announced that these variables are defined elsewhere.
  • The logarithmic function takes the text and adds in his own
    to #log. Reviews of find a large number of calls to this function scattered throughout the code. Basically, I want to keep track of what's going on. These calls are not necessary.
  • The handleOpenedFile function is called if we execute successfully blackberry.io.file.readFile. This is where we do our manipulation of data read. Manipulation converts the blob to string, inserts the text "update the:" to the chain, and then converts this string to a BLOB that is then saved in our output file: test.txt. "."
  • The ready function is called when the DOMContentLoaded event is raised. We provide our default readme.txt filepath then try to read the data.
  • Finally, outside functions, we record the DOMContentLoaded event to trigger our ready function. We place outside all functions to ensure the event is recorded when the

Tags: BlackBerry Developers

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