Question

i am developing an simple blackberry application in BlackBerry – Java Plug-in for Eclipse. In that, i want to read data from an external text file. I had searched for this, and tried for some tips, like. But failed at last. I will describe my application…

my main file…

package com.nuc;

import net.rim.device.api.ui.UiApplication;
public class Launcher extends UiApplication
{
    public static void main(String[] args)
    {
        Launcher theApp = new Launcher();       
        theApp.enterEventDispatcher();
    }

    public Launcher()
    {        
        pushScreen(new MyScreen());
    }    
}

And then my app class is like….

package com.nuc;

import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.component.BasicEditField;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.EditField;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.GridFieldManager;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;

public final class MyScreen extends MainScreen implements FieldChangeListener
{
// declared variables...
    public MyScreen()
    {     
      //rest codes...

I want to show some details from a text file before my app starts, like the End User License Agreement.. ie, something which cames as the first line..

my first question is, where i need to put that text file… i got lots of guidance from net, but nothing worked for eclipse..
Secondly, then how can i read the file and put its content in a dialog.

So plz guide me how i can achieve it.. sample code will be appreciable, for i am new to this environment…

Answer 1

To add a file to your Eclipe project

• right click on the res folder of your project structure, click on New, click on Untitled Text File and then enter some text and save the file.

To read from a file and display on a dialog try something like the following code snippet:

try {
    InputStream is = (InputStream) getClass().getResourceAsStream("/Text");
    String str = "";            
    int ch;
    while ((ch = is.read()) != -1) {
        str += (char)ch;
    }
    synchronized (UiApplication.getEventLock()) {
        Dialog.alert(str == null ? "Failed to read." : str);    
    }
} catch (Exception e) {
    synchronized (UiApplication.getEventLock()) {
        Dialog.alert(e.getMessage() + " + " + e.toString());
    }
}

in the above code "/Text" is the file name. And if you got a NullPointerException then check the file name and path.