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  1. #1
    Registered User
    Join Date
    Mar 2010
    Posts
    9

    Question about the flashbacklight()

    now I met a problem. That is about the function of flashbacklight();
    when I use it in my programm as follows:
    /***************************************************/
    int count = 0;
    ...
    run(){
    if( count++>10 ){
    count = 0;
    display.flashbacklight(1);
    }
    Thread.sleep(1000);
    ...
    }
    /***************************************************/
    it works correctly in e71 ,n96 except n95.
    I just wanna make the screen flash every other 10 seconds ,in which way the backlight can't get dim.
    However, n95 with these codes can't work at all.I don't know how to fix that.And Im so depressed about that.
    thanks in advance!

  2. #2
    Super Contributor
    Join Date
    May 2008
    Location
    Helsinki, Finland
    Posts
    1,100

    Re: about the flashbacklight()

    Hi,

    If you have tested your code to work correctly in e71 ,n96 - as you said,
    then for what comes to the N95...you could check out this article:

    http://wiki.forum.nokia.com/index.ph..._the_backlight

    When I tested the flashing backlight myself, noticed that in N95 the user
    needs to adjust the light to minimum within the phone's settings before
    the flashBacklight method provided visual feedback at all.

    This was not necessary in e.g. 5800Xpress and N97Mini devices that did
    work ok during testing.

    Code used:

    Code:
    /*
     * To change this template, choose Tools | Templates
     * and open the template in the editor.
     */
    
    package test_flash_backlight;
    
    import javax.microedition.midlet.*;
    import javax.microedition.lcdui.*;
    public class test_flashbacklight extends MIDlet
    implements CommandListener
    {
    public test_flashbacklight()
    {
    isPaused = false;
    display = Display.getDisplay(this);
    mainScreen = new List("Backlight Demo", 3);
    mainScreen.append("Set backlight ON", null);
    mainScreen.append("Set backlight OFF", null);
    mainScreen.addCommand(selectCommand);
    mainScreen.addCommand(exitCommand);
    mainScreen.setCommandListener(this);
    }
    public void startApp()
    {
    if(!isPaused)
    display.setCurrent(mainScreen);
    else
    isPaused = false;
    }
    public void pauseApp()
    {
    isPaused = true;
    }
    public void destroyApp(boolean unconditional)
    {
    super.notifyDestroyed();
    }
    public void commandAction(Command c, Displayable d)
    {
    if(c == selectCommand)
    {
    boolean status = true;
    int option = mainScreen.getSelectedIndex();
    if(option == 0)
    {
    status = display.flashBacklight(10000);
    if(!status)
    System.out.println("Error: Could not start backlight");
    } else
    {
    status = display.flashBacklight(0);
    if(!status)
    System.out.println("Error: Could not stop backlight");
    }
    } else
    if(c == exitCommand)
    destroyApp(true);
    }
    private static final Command selectCommand = new
    Command("SELECT", 1, 1);
    private static final Command exitCommand = new Command("EXIT", 7,
    2);
    private boolean isPaused;
    private Display display;
    private List mainScreen;
    }
    Best regards,
    [FONT="Comic Sans MS"][COLOR="Blue"][/COLOR][I]Marko Lumivuori
    Technical Support
    +358 40 8019330
    [email]marko.lumivuori@nokia.com[/email][/I][/FONT]

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