bkqsprite.java

J2ME编程的50个例子,适合掌上系统的编程

package demo;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.Sprite;
import javax.microedition.rms.RecordStore;


public class BKQSprite extends Sprite{
	//精灵状态值
	public static final int BKQ_WALK 		= 0;		//走路
	public static final int BKQ_TALK		= 1;		//谈话
	public static final int BKQ_SLEEP 	= 2;		//睡觉
	public static final int BKQ_MUSIC		= 3;		//听音乐
	public static final int BKQ_NORMAL 	= 4;		//正常
	public static final int BKQ_DEAD 		= 5;		//死了
	public static final int BKQ_STATE_NUM	= 6;
	private int m_nState = BKQ_NORMAL;
	private int m_nJoy = 50;							//兴奋度
	private int m_nKind = 50;							//亲和度
	private int m_nHealth = 50;						//健康度
	//上面三个参数每隔m_nTime时间会自动减少
	private int m_nTime = 600;							
	private int m_nActionTime = 50;					//动作维持的时间
	private Sprite m_Effect;							//特殊效果,如音符等
	public BKQSprite( Image image, int frameWidth, int frameHeight){
		super(image, frameWidth, frameHeight);		
		defineReferencePixel(frameWidth / 2, frameHeight / 2);
		try{
			Image img = Image.createImage("/demo/effect.png");
			m_Effect = new Sprite(img, 15, 14);
			m_Effect.setVisible(false);
		}
		catch (Exception ex){} 
		Load();
	}
	//设置精灵位置
	public void setAllPosition( int x, int y ){
		setPosition(x,y);
		m_Effect.setPosition(x + 55,y + 30);
	}
	//获取当前状态
	public int getState(){
		return m_nState;
	}
	//设置当前状态,每设置一次,会增加相应的参数值
	public void setState(int state){
		m_nState = state;
		switch( m_nState ){
		case BKQ_WALK:
			m_nJoy -= 3;
			m_nHealth += 5;	
			m_Effect.setVisible(false);
			m_nActionTime = 20;
			break;
		case BKQ_TALK:
			m_nKind += 5;
			m_Effect.setVisible(false);
			m_nActionTime = 20;
			break;
		case BKQ_SLEEP:
			m_nJoy += 4;
			m_nHealth -=3;
			m_nKind -= 6;
			m_Effect.setVisible(true);
			m_nActionTime = 20;
			break;
		case BKQ_MUSIC:
			m_nJoy += 2;
			m_nHealth += 3;
			m_Effect.setVisible(true);
			m_nActionTime = 20;
			break;
		case BKQ_NORMAL:
		case BKQ_DEAD:
			m_Effect.setVisible(false);
			break;
		}	
		Save();
	}
	//逻辑操作,产生精灵动画,并判断精灵是否死亡
	public void Logic(){
		int n = getFrame();
		switch( m_nState ){
		case BKQ_WALK:
			if( n == 3 )
				setFrame(4);
			else
				setFrame(3);
			break;
		case BKQ_TALK:
			if( n == 1 )
				setFrame(2);
			else
				setFrame(1);
			break;
		case BKQ_SLEEP:
			setFrame(0);
			n = m_Effect.getFrame();
			if( n == 2 )
				m_Effect.setFrame(3);
			else
				m_Effect.setFrame(2);
			break;
		case BKQ_MUSIC:
			setFrame(2);
			n = m_Effect.getFrame();
			if( n == 0 )
				m_Effect.setFrame(1);
			else
				m_Effect.setFrame(0);
			break;
		case BKQ_NORMAL:
			n ++;
			if( n >= getFrameSequenceLength() )
				n = 0;
			setFrame(n);
			break;
		case BKQ_DEAD:
			setFrame(2);
			return;
		}
		if( m_nJoy < 0 || m_nKind < 0 || m_nHealth < 0 )
			setState(BKQ_DEAD);
		m_nTime --;
		if( m_nTime < 0 ){
			m_nTime = 600;
			m_nJoy -= 10;
			m_nKind -= 10;
			m_nHealth -= 10;
		}
		if( m_nActionTime > 0 ){
			m_nActionTime --;
			if( m_nActionTime <= 0 )
				setState(BKQ_NORMAL);
		}
	}
	//显示精灵,特殊效果,及文字信息
	public void PaintAll(Graphics g){
		paint(g);
		m_Effect.paint(g);
		StringBuffer buffer = new StringBuffer();
		buffer.append("兴奋度:");
		buffer.append(m_nJoy);
		buffer.append("  亲和度:");
		buffer.append(m_nKind);
		buffer.append("  健康度:");
		buffer.append(m_nHealth);
		g.drawString(buffer.toString(), 10, 10, 0 );
	}
	//保存精灵的参数
	public void Save(){
		try{			
			byte b[] = new byte[4*3];
			int temp = m_nJoy;
			for(int i = 11; i >= 8; i--){
				b[i] = new Integer(temp & 0xff).byteValue();
				temp = temp >> 8;
			}		
			temp = m_nKind;
			for(int i = 7; i >= 4; i--){
				b[i] = new Integer(temp & 0xff).byteValue();
				temp = temp >> 8;
			}		
			temp = m_nHealth;
			for(int i = 3; i >= 0; i--){
				b[i] = new Integer(temp & 0xff).byteValue();
				temp = temp >> 8;
			}		
			//打开RecordStore，没有则新建			
			RecordStore rs = RecordStore.openRecordStore(
					"BKQparam",true);			
			if( rs.getNumRecords() > 0 ){	//如果记录数大于0
				rs.setRecord(1, b, 0, b.length);	//更改第一条记录
			}			
			else{     
				//如果没有记录，则添加记录	
				rs.addRecord(b,0,b.length);	
			}		
			rs.closeRecordStore();
		}	
		catch (Exception ex){}	
	}	
	//读取精灵的参数
	public void Load(){
		try{			
			RecordStore rs = 
				RecordStore.openRecordStore( "BKQparam", false);			
			byte b[] = rs.getRecord(1);
			m_nHealth = 0;
			for (int i = 0; i < 3; i++){
				//如果b[i]小于0,则将b[i]转换成相应的正数
				if( b[i] < 0 )	
					m_nHealth += ( b[i] + 256 );
				else
					m_nHealth += b[i];	
				m_nHealth *= 256;	
			}					
			m_nHealth += b[3];	
			if( b[3] < 0 )	
				m_nHealth += 256;	
			
			m_nKind = 0;
			for (int i = 4; i < 7; i++){
				//如果b[i]小于0,则将b[i]转换成相应的正数
				if( b[i] < 0 )	
					m_nKind += ( b[i] + 256 );
				else
					m_nKind += b[i];	
				m_nKind *= 256;	
			}					
			m_nKind += b[7];
			if( b[7] < 0 )	
				m_nHealth += 256;	
			
			m_nJoy = 0;
			for (int i = 8; i < 11; i++){
				//如果b[i]小于0,则将b[i]转换成相应的正数
				if( b[i] < 0 )	
					m_nJoy += ( b[i] + 256 );
				else
					m_nJoy += b[i];	
				m_nJoy *= 256;	
			}					
			m_nJoy += b[11];	
			if( b[11] < 0 )	
				m_nJoy += 256;		
			rs.closeRecordStore();
		}
		catch (Exception ex){}	
	}
}