zonbullet.java

基于J2ME 开发的冒险类手机游戏

package zonja;

import java.io.DataInputStream;
import java.io.DataOutputStream;


public class ZonBullet extends ZonSprite {

	public ZonBullet(int scrWidth, int scrHeight) {
		super(scrWidth, scrHeight);
		setRealSize(12, 12);

	}
	
	private int timer = 0;
	
	private static final int BULLET_SPEED = 3;
	
	public boolean saveData(DataOutputStream dos){
		if(!super.saveData(dos))
			return false;
		try {
			dos.writeInt(timer);
		}
		catch(Exception e) {
			return false;
		}
		
		return true;
	}
	
	public boolean loadData(DataInputStream dis){
		if(!super.loadData(dis))
			return false;
		try {
			timer = dis.readInt();
		}
		
		catch(Exception e) {
			return false;
		}
		
		return true;
	}
	
	void mainAction() {
		
		if(offsetX < -16 && offsetX > scrWidth){
			isVisible = false;
		}
		if(isVisible){
			if(timer++ < 10){
				if(moveDirection == MOVEDIRECTION_LEFT)
					hVelocity = -BULLET_SPEED; 
				else 
					hVelocity = BULLET_SPEED;
				if(timer > 3 && timer <= 7)
					frameIndex = 1;
				else if(timer > 7 && timer < 9)
					frameIndex = 2;
			}else{
				timer = 0;
				isVisible = false;
			}
			move(hVelocity, 0);
		}

	}

}