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Archived:Using eSWT FileDialog in Java ME

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[[Category:S60 3rd Edition FP2]][[Category:Java ME]][[Category:MIDP 2.0]][[Category:File Connection and PIM API (JSR-75)]][[Category:Code Snippet]][[Category:Code Snippet]][[Category:ESWT API]]
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[[Category:Java ME]][[Category:MIDP 2.0]][[Category:File Connection and PIM API (JSR-75)]][[Category:ESWT API]][[Category:Code Examples]][[Category:S60 3rd Edition FP2]][[Category:S60 5th Edition]][[Category:Symbian^3]][[Category:Symbian Anna]][[Category:Nokia Belle]][[Category:Symbian]][[Category:Files/Data]]
{{Archived|timestamp=20120313130339|user=roy.debjit| }}
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{{VersionHint}}
  
 
{{ArticleMetaData <!-- v1.2 -->
 
{{ArticleMetaData <!-- v1.2 -->
|sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
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|sourcecode= [[Media:FileDialogMIDletSource.zip]]
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
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|installfile= [[Media:FileDialogMIDletBinaries.zip]]
 
|devices= S60 3rd Ed. FP2 SDK
 
|devices= S60 3rd Ed. FP2 SDK
 
|sdk= <!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
 
|sdk= <!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
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This code snippet demonstrates how to use eSWT's FileDialog class in Java ME. A FileDialog can be opened and when a file is selected, its size is shown on the screen. The following section contains the complete code for compiling and running the example application.
 
This code snippet demonstrates how to use eSWT's FileDialog class in Java ME. A FileDialog can be opened and when a file is selected, its size is shown on the screen. The following section contains the complete code for compiling and running the example application.
  
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<gallery widths=240px heights=320px>
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File:E52ori.jpg| Start Screen on E52
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File:E52toplevel.jpg| Selection window
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File:E52depth.jpg| Root of phone memory on E52
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</gallery>
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<gallery widths=180px heights=320px>
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File:808toplevel.jpg| Selection window
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File:808depth.jpg|Root of phone memory on PureView 808
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</gallery>
 
==Source code==
 
==Source code==
  
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* [[ESWT|eSWT]]
 
* [[ESWT|eSWT]]
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<!-- Translation --> [[pt:Como usar caixas de diálogo eSWT em Java ME]]

Revision as of 10:32, 17 September 2012

Contents

Version Hint

Windows Phone: [[Category:Windows Phone]]
[[Category:Windows Phone 7.5]]
[[Category:Windows Phone 8]]

Nokia Asha: [[Category:Nokia Asha]]
[[Category:Nokia Asha Platform 1.0]]

Series 40: [[Category:Series 40]]
[[Category:Series 40 1st Edition]] [[Category:Series 40 2nd Edition]]
[[Category:Series 40 3rd Edition (initial release)]] [[Category:Series 40 3rd Edition FP1]] [[Category:Series 40 3rd Edition FP2]]
[[Category:Series 40 5th Edition (initial release)]] [[Category:Series 40 5th Edition FP1]]
[[Category:Series 40 6th Edition (initial release)]] [[Category:Series 40 6th Edition FP1]] [[Category:Series 40 Developer Platform 1.0]] [[Category:Series 40 Developer Platform 1.1]] [[Category:Series 40 Developer Platform 2.0]]

Symbian: [[Category:Symbian]]
[[Category:S60 1st Edition]] [[Category:S60 2nd Edition (initial release)]] [[Category:S60 2nd Edition FP1]] [[Category:S60 2nd Edition FP2]] [[Category:S60 2nd Edition FP3]]
[[Category:S60 3rd Edition (initial release)]] [[Category:S60 3rd Edition FP1]] [[Category:S60 3rd Edition FP2]]
[[Category:S60 5th Edition]]
[[Category:Symbian^3]] [[Category:Symbian Anna]] [[Category:Nokia Belle]]

Article Metadata
Code ExampleTested with
Devices(s): S60 3rd Ed. FP2 SDK
CompatibilityArticle
Keywords: eSWT, FileDialog
Created: jarmlaht (07 May 2008)
Last edited: hamishwillee (17 Sep 2012)

Overview

This code snippet demonstrates how to use eSWT's FileDialog class in Java ME. A FileDialog can be opened and when a file is selected, its size is shown on the screen. The following section contains the complete code for compiling and running the example application.


Source code

import javax.microedition.midlet.*;
import org.eclipse.ercp.swt.mobile.Command;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.FillLayout;
import javax.microedition.io.file.FileConnection;
import javax.microedition.io.Connector;
import java.io.IOException;
 
public class FileDialogMIDlet extends MIDlet implements Runnable, SelectionListener {
private Thread UIThread;
private Display display;
private Shell formShell;
private boolean exiting = false;
private Command fileCommand;
private Command exitCommand;
private Text text;
private String textString = "FileDialogMIDlet";
 
public void startApp() {
// Create the eSWT UI thread.
if(UIThread == null) {
UIThread = new Thread(this);
UIThread.start();
}
}
 
public void pauseApp() {
}
 
public void destroyApp(boolean unconditional) {
// Make the event loop exit in the eSWT UI thread.
exitEventLoop();
// Wait for the eSWT UI thread to die.
try {
UIThread.join();
} catch(InterruptedException e) {
}
}
 
void exitEventLoop() {
exiting = true;
Display.getDefault().wake();
}
 
// The eSWT UI Thread.
public void run() {
display = new Display();
FillLayout fillLayout = new FillLayout();
formShell = new Shell(display);
formShell.setLayout(fillLayout);
formShell.open();
Composite form = new Composite(formShell, SWT.NONE);
form.setLayout(fillLayout);
text = new Text(form, SWT.READ_ONLY | SWT.WRAP);
text.setText(textString);
fileCommand = new Command(formShell, Command.SELECT, 0);
fileCommand.setText("Open FileDialog");
fileCommand.addSelectionListener(this);
exitCommand = new Command(formShell, Command.EXIT, 0);
exitCommand.setText("Exit");
exitCommand.addSelectionListener(this);
formShell.redraw();
 
// Execute the eSWT event loop.
while(!exiting) {
if(!display.readAndDispatch()) {
display.sleep();
}
}
 
// Clean up and destroy the MIDlet.
display.dispose();
notifyDestroyed();
}
 
public void widgetDefaultSelected(SelectionEvent e) {
}
 
public void widgetSelected(SelectionEvent e) {
if (e.widget.equals(fileCommand)) {
openFileDialog();
}
if (e.widget.equals(exitCommand)) {
// Exit command selected, exit the event loop.
exitEventLoop();
}
}
 
public void openFileDialog() {
FileDialog fDialog = new FileDialog(formShell);
fDialog.open();
String filterPath = fDialog.getFilterPath();
String temp = filterPath.replace('\\', '/'); // '\‘ characters are replaced with '/'
filterPath = temp;
String fileName = fDialog.getFileName();
String path = "file:///" + filterPath + fileName;
// path is for example: file:///C:/Data/Images/image.png, this can be used as file
// URL for FileConnection
if (!path.equals("file:///")) {
// Path equals "file:///", if file dialog is canceled.
try {
FileConnection fc = (FileConnection) Connector.open(path, Connector.READ);
if (!fc.isDirectory()) {
textString = "File size: " + fc.fileSize() + " bytes";
text.setText(textString);
}
} catch (IOException ioe) {
// Thrown if an I/O error occurs or if the method is invoked on a directory.
// Note: It is not possible to select a directory in FileDialog.
textString = "IOException: " + ioe.getMessage();
text.setText(textString);
}
catch (SecurityException se) {
// Thrown if the security of the application does not have read access for
// the file.
textString = "SecurityException: " + se.getMessage();
text.setText(textString);
}
formShell.redraw();
}
}
}

Postconditions

When a FileDialog is opened and a file is selected in it, the file size is shown on the screen.

See also

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