Using Thread.sleep()

[schumi1331]

Hello,
I wanted to add a start up screen showing the app-icon at the start of the app, like janole did this in his Gravity-app.
But I'm not able to get the app to stop to show the screen for 2/3 seconds and then go on. I tried it with several positions of Thread.sleep();

Here's the code I used, I hope you can help me.

Main:

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.lcdui.Graphics.*;

public class WahlZufall extends MIDlet {
    boolean start;
    public WahlZufall() {
        start = false;
    }

    protected void startApp() {
        if (start = false) {
            Display.getDisplay(this).setCurrent(new StartUp(this));
            try {
                Thread.sleep(5000);
            } catch (Exception e) {
            }
            start = true;
        }
	Display.getDisplay(this).setCurrent(new MyCanvas(this));
    }

    protected void pauseApp() {}
    protected void destroyApp(boolean unconditional) {}
}

The class with the icon:

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

public class StartUp extends Canvas {
    WahlZufall midlet;
    Image icon;
    //Die Größe des Bildschirms
    int width;
    int height;

    public StartUp (WahlZufall _midlet) {
        try {
            icon = Image.createImage("/icon.png");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    protected void paint (Graphics g) {
        g.setColor(0x00f49f60);
        g.fillRect(0, 0, sW(360), sH(640));
        g.drawImage(icon, sW(180), sH(320), Graphics.HCENTER|Graphics.VCENTER);
    }

    //Veränderung der Höhe bei Drehen des Gerätes
    protected void sizeChanged(int w, int h) {
        (...)
    }

    public int sW(int z) {
        (...)
    }
    public int sH(int z) {
        (...)
    }
}

[skalogir]

Use synchronised() and wait().

Try this code instead that displays a splash screen (/splash.png image should be placed in your resources) for 3 seconds and then resumes the midlet's operation from the splashScreenDone() method:

SplashScreenMidlet

import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Image;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.io.Connector;

public class SplashScreenMidlet extends MIDlet {

	protected void destroyApp(boolean unconditional)
			throws MIDletStateChangeException {
	}
	protected void pauseApp() {
	}

	protected void startApp() throws MIDletStateChangeException {

            Display.getDisplay(this).setCurrent(new SplashScreen(this));
	}


	void splashScreenDone()
	{
		//Resume Code from here		
	}
	
	static Image createImage(String filename)
	{
		Image image = null;
	    try
	    {
	    	image = Image.createImage(filename);
	    }
	    catch (java.io.IOException ex)
	    {
	    	System.out.println(ex.getMessage());ex.printStackTrace();
	    }
	    return image;
	}

}

SplashScreen

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

public class SplashScreen extends Canvas implements Runnable
{
    private final SplashScreenMidlet midlet;
    private Image splashImage;
    private volatile boolean dismissed = false;
    
    SplashScreen(SplashScreenMidlet midlet)
    {
        this.midlet = midlet;
        setFullScreenMode(true);
        splashImage = SplashScreenMidlet.createImage("/splash.png");
        new Thread(this).start();
    }
    
    public void run()
    {
        synchronized(this)
        {
            try
            {
                wait(3000L);   // 3 seconds
            }
            catch (InterruptedException e)
            {
                // can't happen in MIDP: no Thread.interrupt method
            }
            dismiss();
        }
    }
    public void paint(Graphics g)
    {
        int width = getWidth();
        int height = getHeight();
        g.setColor(0x00FFFFFF);  // white
        g.fillRect(0, 0, width, height);
        g.setColor(0x00FF0000);  // red
        g.drawRect(1, 1, width-3, height-3);  // red border one pixel from edge
        if (splashImage != null)
        {
            g.drawImage(splashImage,
                        width/2,
                        height/2,
                        Graphics.VCENTER | Graphics.HCENTER);
            splashImage = null;
        }
    }

    public synchronized void keyPressed(int keyCode)
    {
        dismiss();
    }

    private void dismiss()
    {
        if (!dismissed)
        {
            dismissed = true;
            midlet.splashScreenDone();
        }
    }

}

[schumi1331]

wow, thanks for answering!

the code works awesome, thank you

now I need to understand what it means...
will ask if I have a question anywhere

[Tiger79]

also just to have an idea : there should be an example of a splash screen in the Wiki, thats what you are looking for and how such a screen is called.