Fullscreen proeview of camera image with CideoControl

[pacjent]

Hi all,

I have recently tried to create an application that uses camera in Nokia N8 phone. The problem is that the camera is displayed in a small box (of size about of the "old phones" 320*240) even after setting the VideoControl.setDisplayFullScreen(true);.

Is there a way in Java to get the preview of what camera is "seeing" in a full screen?

I used the following tutorial: http://www.developer.nokia.com/Commu...ots_in_Java_ME

[skalogir]

Hi pacjent,

Would it work, if you tried this sample code where you get the screen's width and height and then you set the display size as follows:

int canvasWidth = getWidth();
int canvasHeight = getHeight();
videoControl.setDisplaySize(canvasWidth, canvasHeight);

[pacjent]

Hi skalogir,

I have tried the example you sent, but I have the same problem. The video preview is small. The On screen keyboard is displayed on the screen. When I use Nokia-MIDlet-On-Screen-Keypad: no, the keyboard is gone, but the preview window is still of the same (small) size. I would like to have the camera prewiev displayed as a full screen (just like it is displayed when you launch built-in camera software).

[saquas]

Have you tried something like this:

 
videoControl = (VideoControl) player.getControl("VideoControl");
Item item = (Item) videoControl.initDisplayMode(VideoControl.USE_GUI_PRIMITIVE, null);
videoControl.setDisplayFullScreen(true);
myForm.append(item);

[pacjent]

Hi saquas,

Yes, I have. The Item is resized ot a fullscreen, but the video displayed on it is stillof the same size.
Has anyone manage to display a full screen preview of a camera on Nokia N8? Is it possible, or maybe the API does not provide such features?

[skalogir]

Hi pacjent,

I have managed to get a full screen video (with side bars at the top and bottom) with the following code on PureView 808 running Belle:

Main MIDlet:

import javax.microedition.lcdui.Display;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;


public class CameraMIDlet extends MIDlet {
    Display display;
    CameraCanvas canvas;
    protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
        // TODO Auto-generated method stub

    }

    protected void pauseApp() {
        // TODO Auto-generated method stub

    }

    protected void startApp() throws MIDletStateChangeException {
        display = Display.getDisplay(this);
        canvas = new CameraCanvas();
        canvas.setFullScreenMode(true);
        display.setCurrent(canvas);

    }

}

Supportive Canvas Class:

import java.io.IOException;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import javax.microedition.media.control.VideoControl;


public class CameraCanvas
    extends Canvas{
    
    Player player;
    VideoControl videoControl;
    
    CameraCanvas() {
        try {
            // Newer phones need to be initialized to image mode
            try {
                player = Manager.createPlayer("capture://image");
    
                // Older phones don't support this, so we start them
                // in video mode.
            } catch (Exception ce) {
                System.out.println("changing to capture video");
                player = Manager.createPlayer("capture://video");
            }
            player.realize();
            
            player.prefetch();
            
            // Get VideoControl for the viewfinder
            videoControl = (VideoControl) player.getControl("VideoControl");
            if (videoControl == null) {
                discardPlayer();
                player = null;
                System.out.println("VideoContro = null!");
            } else {
                // Set up the viewfinder on the screen.
                videoControl.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, this);
                videoControl.setDisplayFullScreen(true);
                player.start();
                videoControl.setVisible(true);
            }
        } catch (IOException ioe) {
            discardPlayer();
            System.out.println("IOException: " + ioe.getMessage());
        } catch (MediaException me) {
            System.out.println("MediaException: " + me.getMessage());
        } catch (SecurityException se) {
            System.out.println("SecurityException: " + se.getMessage());
        }
    }

    // Stops the video player
    synchronized void stop() {
        if (player != null) {
            try {
                videoControl.setVisible(false);
                player.stop();
            } catch (MediaException me) {
                System.out.println("MediaException: " + me.getMessage());
            }
        }
    }
    
    // this method will discard the video player
    private void discardPlayer() {
        if (player != null) {
            player.deallocate();
            player.close();
            player = null;
        }
        videoControl = null;
    }

    protected void paint(Graphics g) {
        // TODO Auto-generated method stub
        
    }


}

I also had to use this jad attribue: Nokia-MIDlet-On-Screen-Keypad: no

I don't see why this won't work on N8. Can you try the above code and let us know if it works on your device?