第五天 Animate!

最新推荐文章于 2024-08-29 15:23:04 发布

原创最新推荐文章于 2024-08-29 15:23:04 发布 · 481 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#exception #image #class #import #null #layer

春节好少休息了一下。所以快一个月没有加东西了。但千万不要以为我偷懒了，已经看完了m3g的部分介绍。

当然，学习还要稳扎稳打，所以，今天把上会剩下的一点完成。让我们的画面动起来！

要点：1、学会使用Sprite， 2、学会使用Thread

Sprite 是Layer的子类，因此，大多数和Layer的用法一样，需要对期显示序列进行手动设置比较让人头疼。直接用线程控制了。

增加了一个线程文件 SperkAni.java

public class SpeakAni extends Thread {
private BackCanvas bc;
private int frameIndex;
private int maxFrameIndex;
public SpeakAni (BackCanvas creater){
  bc=creater;
  frameIndex=0;
  maxFrameIndex=bc.Sore.getRawFrameCount()-1;
}
public void run(){
  int WordRound =5;
  while (WordRound>0){
   while (frameIndex<=maxFrameIndex){
    bc.Sore.setFrame(frameIndex);
    frameIndex=frameIndex+1;
    bc.repaint();
    try{
     sleep(50);
     System.out.println("changeing...");
    }
    catch (Exception e)
    {
     ;
    }
   }
   frameIndex=0;
   WordRound=WordRound-1;
  }
}
}

控制一个动画序列连续播放5次，每帧间隔50毫秒。
绘制部分也增加了相应代码，需要注意的问题，已经用注释写出来了

import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.game.LayerManager;
import javax.microedition.lcdui.game.TiledLayer;
import javax.microedition.lcdui.game.Sprite;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.Graphics;

public class BackCanvas extends GameCanvas {
     private Scence scence;
     private LayerManager layerManager;
     private TiledLayer backLayer;
     public Sprite Sore;

public BackCanvas(){
super(false);
scence = new Scence();
scence.screenX =0;
scence.screenY =0;
Sore=scence.LoadSprite("Sore");

layerManager = new LayerManager();
Image temp= scence.init();
backLayer = new TiledLayer(1,1,temp,temp.getWidth(),temp.getHeight());
backLayer.setCell(0, 0, 1);
layerManager.append(Sore);  //添加顺序决定覆盖。
layerManager.append(backLayer);
}

public void paint(Graphics g){
scence.painting =true;
try{
   layerManager.setViewWindow(scence.screenX, scence.screenY, scence.screenWidth, scence.screenHeight);
   layerManager.paint(g, 0, 20);
   if (scence.DEBUG)
    System.out.println("paint() Executed!");
}catch (Exception e){
   System.out.println("绘制过程出现故障");
}finally{
   scence.painting =false;
}
//this.flushGraphics();
}

protected void keyPressed(int keyCode){
SpeakAni ani;
int oldx=scence.screenX;
int oldy=scence.screenY;
try{
   if (scence.painting) return;
   switch (keyCode) {
   case -1:if (scence.screenY>scence.unitHeight) scence.screenY=scence.screenY-scence.unitHeight; break;
   case -2:if (scence.screenY<scence.backHeight-scence.screenHeight-scence.unitHeight) scence.screenY=scence.screenY+scence.unitHeight;break;
   case -3:if (scence.screenX>scence.unitWidth) scence.screenX=scence.screenX-scence.unitWidth; break;
   case -4:if (scence.screenX<scence.backWidth-scence.screenWidth-scence.unitWidth) scence.screenX=scence.screenX+scence.unitWidth;break;
   case -5:{ani= new SpeakAni(this);ani.setPriority(1); ani.start();} //过高的现成顺序会导致线程sleep 也优先执行。
   }
   System.out.println(keyCode);
}catch (Exception e){
   System.out.println("捕获不明错误");
   scence.screenX=oldx;
   scence.screenY=oldy;
}
this.repaint();
if (scence.DEBUG) System.out.println("keyPressed() Executed!");
}
}

其实有时候自己一点一点增加代码有些好处，可以知道哪些是必须的try catch。

主文件没有改动，场景增加了几个功能。

import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.Sprite;

public class Scence {
public boolean DEBUG=false;
public int StageLevel=0;

public final int screenWidth=200;
public final int screenHeight=300;
public final int ScreenCenX=100;
public final int ScreenCenY=150;
public final int unitWidth=20;
public final int unitHeight=30;
public final int faceWidth=50;
public final int faceHeight=50;
public int screenX=0;
public int screenY=0;
public int backWidth;
public int backHeight;

public boolean painting=false;

public Image init(){
Image temp;
try{
   temp= Image.createImage("/Level"+StageLevel+".png");
}catch (Exception e){
   System.out.println("读取地图错误。--"+"/Levle"+StageLevel+".png");
   return null;
}
backWidth = temp.getWidth();
backHeight= temp.getHeight();
return temp;
}

public Sprite LoadSprite(String name){
Image temp;
Sprite sp;
try{
   temp=Image.createImage("/"+name+".png");
}
catch (Exception e){
   System.out.println("读取"+name+".png错误");
   return null;
}
sp=new Sprite(temp,faceWidth,faceHeight);
sp.setFrameSequence(null);
sp.setPosition(ScreenCenX, ScreenCenY);
return sp;
}
}