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==Overview==

This code snippet demonstrates how to use MMAPI and eSWT together to take a picture using the phone's camera. This code displays the camera viewfinder on an eSWT Control. It also provides an eSWT Command which will take the picture and save it.

==Source code==

<code java>
import java.io.IOException;
import java.io.OutputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.file.FileConnection;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import javax.microedition.media.control.VideoControl;
import javax.microedition.midlet.MIDlet;
import org.eclipse.ercp.swt.mobile.Command;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class MMAPIExample extends MIDlet implements Runnable, SelectionListener {

	Thread UIThread;
	Display display;
	Shell shell;
	private Command takePictureCommand;
	private VideoControl videoControl;

	public void startApp() {
		// Create the eSWT UI thread.
		if(UIThread == null) {
			UIThread = new Thread(this);
			UIThread.start();
		}
	}

	public void pauseApp() {
		// Here we could reduce the resources but we should keep the Display instance
		// and the eSWT UI Thread.
	}

	public void destroyApp(boolean unconditional) {
		// Dispose the remaining resources.
		display.dispose();
	}

	// The eSWT UI Thread
	public void run() {
		// Create the Display.
		display = new Display();

		shell = new Shell(display);
		shell.open();

		Command exitCommand = new Command(shell, Command.EXIT, 0);
		exitCommand.setText("Exit");
		exitCommand.addSelectionListener(this);

		takePictureCommand = new Command(shell, Command.GENERAL, 10);
		takePictureCommand.setText("Snap!");
		takePictureCommand.addSelectionListener(this);
		takePictureCommand.setDefaultCommand();

		Player player = null ;
		try {
			player = Manager.createPlayer("capture://video");
			player.realize();
			videoControl = (VideoControl) player.getControl("VideoControl");
			Control vControl = (Control) videoControl.initDisplayMode(VideoControl.USE_GUI_PRIMITIVE, Control.class.getName());
			vControl.setParent(shell);
			Rectangle r = vControl.getBounds();
			videoControl.setDisplaySize(r.width, r.height);
			videoControl.setVisible(true);
			player.start();

		} catch (IOException e) {

		} catch (MediaException e) {

		}


		// Execute the eSWT event loop.
		while(!shell.isDisposed()) {
			if(!display.readAndDispatch()) {
				display.sleep();
			}
		}
		if (player != null){
			player.deallocate();
			player.close();
			player = null;
		}

		// Clean up and destroy the MIDlet
		destroyApp(true);
		notifyDestroyed();
	}

	public void widgetDefaultSelected(SelectionEvent e) {
	}

	public void widgetSelected(SelectionEvent e) {
		if(e.widget == takePictureCommand){
			takePicture();
		}else{
			// Exit command selected, exit the event loop.
			shell.dispose();
		}
	}

	private void takePicture(){

	       byte[] snapshot;
	       try {
	            snapshot = videoControl.getSnapshot(null);
	            if (snapshot == null || snapshot.length == 0)return;
	            String filename = "file:///c:/data/images/I"+System.currentTimeMillis()+".png";
	            FileConnection fileConnection = (FileConnection) Connector.open(filename,Connector.READ_WRITE);
	            fileConnection.create();
	            OutputStream stream = fileConnection.openOutputStream();
	            stream.write(snapshot);
	            stream.flush();
	            stream.close();
	            fileConnection.close();

	        } catch (MediaException e) {

	        } catch (IOException e) {

		}
	}


}

</code>

==Postconditions==

A PNG image containing the picture is saved under C:\Data\Images.

==See also==

* [http://wiki.forum.nokia.com/index.php/ESWT eSWT]

[[Category:Java ME]][[Category:eSWT]][[Category:MIDP 2.0]][[Category:MMAPI (JSR-135)]][[Category:Code Examples]]