mainmenu.java

有关手机游戏网络对战方面的源码

package unicoco;

import java.io.IOException;
import java.io.InputStream;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import javax.microedition.midlet.MIDletStateChangeException;

public class MainMenu extends Canvas {
	Font lowFont;

	Font highFont;

	static MainMenu instance;

	static final int SINGLEPALYER = 0;

	static final int VSMODE = 1;

	static final int OPTIONS = 2;

	static final int EXIT = 3;

	String[] mainMenu;

	private Image banner;

	byte menuIndex;

	int menuY;

	byte hfheight;

	byte spacing;

	Player musicPlayer;

	MainMenu() {
		setFullScreenMode(true);
		try {
			this.banner = Image.createImage("/mainMenu1.png");
		} catch (IOException e) {
			// e.printStackTrace();
			MIDGame.game.notifyDestroyed();
		}
		lowFont = Font.getFont(Font.FACE_MONOSPACE, Font.STYLE_PLAIN,
				Font.SIZE_SMALL);
		highFont = Font.getFont(Font.FACE_MONOSPACE, Font.STYLE_BOLD,
				Font.SIZE_MEDIUM);
		hfheight = (byte) highFont.getHeight();
		spacing = (byte) (hfheight / 6);
		mainMenu = new String[] { "Single Player", "VS Mode", "Options", "Exit" };
		menuY = hfheight * mainMenu.length + (mainMenu.length - 1) * (spacing);
		menuY = (getHeight() - banner.getHeight() - menuY) / 2
				+ banner.getHeight();
	}

	protected void hideNotify() {
		if (musicPlayer != null) {
			try {
				musicPlayer.stop();
			} catch (MediaException e) {
			}
		}
	}

	protected void paint(Graphics g) {
		// System.out.println(getWidth() + " " + getHeight());

		g.setColor(0xFF000000);
		g.fillRect(0, 0, getWidth(), getHeight());
		g.drawImage(banner, 0, 0, Graphics.TOP | Graphics.LEFT);
		for (int i = 0; i < mainMenu.length; i++) {
			if (i == menuIndex) {
				// 高亮块的颜色
				g.setColor(192, 192, 192);
//				绘制高亮块
				g.fillRect(0, menuY + i * hfheight + ((i - 1) * spacing),
						getWidth(), hfheight);
				g.setFont(highFont);
				g.setColor(255, 0, 0);
				g.drawString(mainMenu[i], (getWidth() - highFont
						.stringWidth(mainMenu[i])) / 2, menuY + i * hfheight
						+ ((i - 1) * spacing), Graphics.TOP | Graphics.LEFT);
			} else {
				g.setFont(lowFont);
				g.setColor(213, 213, 0);
				g.drawString(mainMenu[i], (getWidth() - lowFont
						.stringWidth(mainMenu[i])) / 2, menuY + i * hfheight
						+ ((i - 1) * spacing), Graphics.TOP | Graphics.LEFT);
			}
		}
	}

	protected void keyPressed(int code) {
		if (getGameAction(code) == Canvas.UP) {
			menuIndex = (byte) ((menuIndex + 3) % 4);
		} else if (getGameAction(code) == Canvas.DOWN) {
			menuIndex = (byte) ((menuIndex + 1) % 4);
		} else if (getGameAction(code) == Canvas.FIRE) {
			switch (menuIndex) {
			case SINGLEPALYER:
				MIDGame.display.setCurrent(GameMainCanvas.getInstance());
				System.gc();
				break;
			case VSMODE:
				MIDGame.display.setCurrent(SelectList.getInstance());
				System.gc();
				break;
			case OPTIONS:
				MIDGame.display.setCurrent(OptionsForm.getInstance());
				break;
			case EXIT:
				MIDGame.game.notifyDestroyed();
				try {
					MIDGame.game.destroyApp(false);
				} catch (MIDletStateChangeException e) {
					// e.printStackTrace();
					MIDGame.game.notifyDestroyed();
				}
				break;
			default:
				return;
			}
		}
//		只重画一定的范围，提高系统的效率
		repaint(0, menuY - spacing, getWidth(), getHeight() - menuY + spacing);
	}

	public final static Displayable getInstance() {
		if (MainMenu.instance == null) {
			MainMenu.instance = new MainMenu();
		}
		instance.menuIndex = 0;
		return MainMenu.instance;
	}

	protected void showNotify() {
		if (MIDGame.game.music == 1) {
			InputStream is = getClass().getResourceAsStream("/theme.mid");
			try {
				musicPlayer = javax.microedition.media.Manager.createPlayer(is,
						"audio/midi");
				musicPlayer.setLoopCount(-1);
				musicPlayer.start();
			} catch (IOException e1) {
				// TODO Auto-generated catch block
				// e1.printStackTrace();
			} catch (MediaException e1) {
				// TODO Auto-generated catch block
				// e1.printStackTrace();
			}
		}
	}
}