gamemidlet.java

同样是用j2me写的

import javax.microedition.midlet.* ;
import javax.microedition.lcdui.* ;
import javax.microedition.rms.*;
import java.io.*;
public class GameMIDlet extends MIDlet
implements CommandListener
{
        Display display ;
		Alert alert;
		int flag = 0;
		private RecordStore rs;
		private ByteArrayInputStream bis;
		private DataInputStream dis;
		private ByteArrayOutputStream bos;
		private DataOutputStream dos;
		private byte b[];
		private int recordID;
		private int i;
		int Score = MyGameWithColliCanvas.Score;


        public GameMIDlet()
        {
                display = Display.getDisplay(this) ;
				bos = new ByteArrayOutputStream();
				dos = new DataOutputStream(bos);
				b = new byte[256];
				bis = new ByteArrayInputStream(b);
				dis = new DataInputStream(bis);
        }
        //MyGameWithTiledLayerCanvas mgc ;
        //MyGameWithSpriteRotateCanvas mgc ;
        //MyGameWithSpriteRotateCanvas2 mgc ;
        //MyGameWithSpriteRotateCanvas3 mgc ;
        MyGameWithColliCanvas mgc ;
        public void startApp()
        {
                if(mgc==null)
                {
                        //mgc = new MyGameWithTiledLayerCanvas();
                        //mgc = new MyGameWithSpriteRotateCanvas();
                        //mgc = new MyGameWithSpriteRotateCanvas2();
                        //mgc = new MyGameWithSpriteRotateCanvas3();
                        mgc = new MyGameWithColliCanvas();
                        mgc.addCommand(new Command("继续", Command.OK, 1));
                        mgc.addCommand(new Command("结束", Command.EXIT, 2));
						mgc.addCommand(new Command("重新开始", Command.OK, 1));
                        mgc.addCommand(new Command("保存", Command.OK, 1));
						alert = new Alert("游戏进度","                   Score : "+Score+"\n"+"                       保存成功！",null,AlertType.INFO);
						alert.setTimeout(1000);
                        mgc.setCommandListener(this);
                        display.setCurrent(mgc);
                }
        }
        public void commandAction(Command c,Displayable s)
        {
                String cmd = c.getLabel() ;
                if(cmd.equals("重新开始"))
                {
						MyGameWithColliCanvas.Score = 10;
                        mgc.start() ;
                }else if(cmd.equals("结束"))
                {
                        mgc.exit() ;
                        notifyDestroyed() ;
                }
				else if (cmd.equals("继续"))
				{
					flag = 1;
						try
						{
							rs = RecordStore.openRecordStore("score",true);
							for (i = 1; i <= rs.getNumRecords()-1; i++)
							{
							  rs.getRecord(i, b, 0);
							  bis.reset();
							}
							bis.reset();
							rs.getRecord(i, b, 0);
							String temp;
							temp = dis.readUTF();
							Score = Integer.parseInt(temp);
						}
						catch (Exception e)
						{
							System.out.println("Error: "+e.getMessage() );
						}
						try
						{
							rs.closeRecordStore();

						}
						catch (Exception e)
						{
							System.out.println("Error: "+e.getMessage() );
						}
						 mgc.start() ;
				}
				else if (cmd.equals("保存"))
				{
					try
					{
						rs = RecordStore.openRecordStore("score",true);
						dos.writeUTF(String.valueOf(Score));
						dos.flush();
						b = bos.toByteArray();

						recordID = rs.addRecord(b,0,b.length);
						display.setCurrent(alert);
					}
					catch (Exception e)
					{
						System.out.println("Error: "+e.getMessage() );
					}
					try
					{
						rs.closeRecordStore();

					}
					catch (Exception e)
					{
						System.out.println("Error: "+e.getMessage() );
					}

					
				}

        }
        public void pauseApp()
        {

        }
        public void destroyApp(boolean unconditional)
        {
			try{
			bis.close();
			bos.close();
			dis.close();
			dos.close();
		}catch(Exception e){
			System.out.println("Error: " + e.getMessage());
		}
        }
}