listing12-14_animatedmenumidlet.java_usingspriteitem

来自「着几乎所有智能机厂商都将有自己配套的App Store,甚至并非智能手机制造商的」· JAVA_USINGSPRITEITEM 代码 · 共 114 行

// use the SpriteItem for some cool animation effects like a book
// that opens up when it is selected by the user.


package com.apress.ui;

import java.io.IOException;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.Item;
import javax.microedition.lcdui.ItemCommandListener;
import javax.microedition.lcdui.game.Sprite;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import de.enough.polish.ui.SpriteItem;

public class AnimatedMenuMidlet
extends MIDlet
implements ItemCommandListener
{
	private Display display;
	private Form mainForm;
	private final Command startCmd;
	private final Command loadCmd;
	private final Command aboutCmd;
	private final Command exitCmd;

	public AnimatedMenuMidlet() {
		super();
		this.startCmd = new Command( "Start Game", Command.ITEM, 1 );
		this.loadCmd = new Command( "Load Game", Command.ITEM, 1 );
		this.aboutCmd = new Command( "About", Command.ITEM, 1 );
		this.exitCmd = new Command( "Exit", Command.ITEM, 1 );

		try {
			this.mainForm = new Form( "Main Menu" );
			int frameWidth = 30;
			int frameHeight = 30;
			// create the start game menu item:
			Image image = Image.createImage( "/player.png");
			Sprite sprite = new Sprite( image, frameWidth, frameHeight );
			sprite.setFrameSequence( new int[]{ 2, 5, 5, 6, 3, 7, 1 } );
			//#style mainScreenItem
			SpriteItem spriteItem = new SpriteItem( null, sprite, 200, 0, false );
			spriteItem.setDefaultCommand( this.startCmd );
			spriteItem.setItemCommandListener( this );
			this.mainForm.append( spriteItem );
			// create the load game menu item:
			image = Image.createImage( "/load.png");
			sprite = new Sprite( image, frameWidth, frameHeight );
			// use default frame sequence
			//#style mainScreenItem
			spriteItem = new SpriteItem( null, sprite, 200, 0, false );
			spriteItem.setDefaultCommand( this.loadCmd );
			spriteItem.setItemCommandListener( this );
			this.mainForm.append( spriteItem );
			// create the about menu item:
			image = Image.createImage( "/about.png");
			sprite = new Sprite( image, frameWidth, frameHeight );
			//#style mainScreenItem
			spriteItem = new SpriteItem( null, sprite, 200, 0, false );
			spriteItem.setDefaultCommand( this.aboutCmd );
			spriteItem.setItemCommandListener( this );
			this.mainForm.append( spriteItem );
			// create the exit menu item:
			image = Image.createImage( "/exit.png");
			sprite = new Sprite( image, frameWidth, frameHeight );
			//#style mainScreenItem
			spriteItem = new SpriteItem( null, sprite, 200, 0, false );
			spriteItem.setDefaultCommand( this.exitCmd );
			spriteItem.setItemCommandListener( this );
			this.mainForm.append( spriteItem );
		} catch ( IOException e ) {
			//#debug error
			System.out.println( "Unable to create menu screen" + e );
			this.mainForm = null;
		}
	}

	protected void startApp() throws MIDletStateChangeException {
		this.display = Display.getDisplay( this );
		if ( this.mainForm == null ) {
			throw new MIDletStateChangeException();
		}
		this.display.setCurrent( this.mainForm );
	}

	protected void pauseApp() {
		// just pause
	}

	protected void destroyApp( boolean unconditional )
	throws MIDletStateChangeException
	{
		// just quit
	}

	public void commandAction( Command cmd, Item item ) {
		if ( cmd == this.startCmd ) {
			// start game...
		} else if ( cmd == this.loadCmd ) {
			/// load game...
		} else if ( cmd == this.aboutCmd ) {
			// about this game...
		} else if ( cmd == this.exitCmd ) {
			notifyDestroyed();
		}
	}
}