gamescreen.java

一个小程序,提供参考

import java.io.IOException;

import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

public class GameScreen extends Canvas {
	Command cmdOk, cmdCancel;

	MyMIDlet mid;

	Display d;

	String str = "";

	Image img, img1, img2;

	private int y;

	private int x;

	public GameScreen(MyMIDlet mid, Display d) {
		this.mid = mid;
		this.d = d;
		try {
			img2 = Image.createImage("/dragon_0.png");
			img1 = Image.createImage("/dragon_7.png");
		} catch (IOException e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
		}
		img = img1;
	}

	protected void paint(Graphics g) {
		// TODO 自动生成方法存根
		g.setColor(0xffffff);
		g.fillRect(0, 0, getWidth(), getHeight());
		g.drawImage(img, x, y, 20);
	}

	protected void keyPressed(int keyCode) {
		int t = getGameAction(keyCode);
		switch (t) {
		case UP:
			y -= 3;
			break;
		case DOWN:
			y += 3;
			break;
		case LEFT:
			x -= 3;
			break;
		case RIGHT:
			x += 3;
			break;
		case GAME_A:
			x-=3;
			y-=3;
			break;
		case GAME_B:
			x+=3;
			y-=3;
			break;
		case GAME_C:
			x-=3;
			y+=3;
			break;
		case GAME_D:
			x+=3;
			y+=3;
			break;
		case FIRE:
			x+=30;
			break;
		default:
		}
		/*
		 * switch(keyCode){ case KEY_NUM4: x-=3; break; case KEY_NUM8: y+=3;
		 * break; case KEY_NUM2: y-=3; break; case KEY_NUM6: x+=3; break; case
		 * KEY_STAR:
		 * 
		 * str="*"; break; }
		 */
		img = img1;
		repaint();
	}

	protected void keyReleased(int arg0) {
		img = img2;
		repaint();
		System.out.println("按键弹起");
	}

	protected void keyRepeated(int keyCode) {
		System.out.println("按键按住不放");
		switch (keyCode) {
		case KEY_NUM4:
			x -= 3;
			break;
		case KEY_NUM8:
			y += 3;
			break;
		case KEY_NUM2:
			y -= 3;
			break;
		case KEY_NUM6:
			x += 3;
			break;
		case KEY_STAR:

			str = "*";
			break;
		}
		repaint();
	}

}