actiongamecanvas.java~91~

GAME EXAMPLE OF J2ME FOR SHARE

import javax.microedition.lcdui.*;
//import com.nokia.mid.ui.*;
import javax.microedition.lcdui.game.*;   // Use GameCanvas of MIDP 2.0
import javax.microedition.media.*;
import java.io.*;
import java.io.IOException;




public class ActionGameCanvas extends GameCanvas implements Runnable{
  GameMIDlet gameParent;
  Thread actionThread;
  int millPerTick = 200;

  Sprite myHero;
  Image heroImg;
  int heroHit;     // 0 = not hit, use value to set disappear delay
  int heroDir=0;   // // R=0, D=1, L=2, U=3
  int heroStep;
  int score=10;
  int di0=0,di1=0,di2=0,di3=0;
  int co0,co1,co2,co3;
  Sprite[] enemies;
  Image[] enemyImg;
  boolean[] enemyHit;
  int enemyStep;
  Image explodeImg;       // the explosion image
  Image xxx_img;

  LayerManager lm;
  Player player;            // for playing MIDI
  boolean playSound=false;

  //===========================================================================
  public ActionGameCanvas(GameMIDlet parent){
    super(true);
    try {
  xxx_img = Image.createImage("/missile.png");
}
catch (IOException e) {
  System.out.println(e.getMessage());
}

    setFullScreenMode(true);
    this.gameParent = parent;
    actionThread = new Thread(this);
    initCanvas();
    actionThread.start();
  }

  //===========================================================================
  public void initHero(){
    myHero = createSprite("/trooper.png", 32, 32);  // set frame size
    //System.out.println("Create Sprite OK.");
    int seq[] = new int[] { 0, 1 };
    myHero.setFrameSequence( seq );       // SET frame sequence
    myHero.defineReferencePixel(16, 16);  // SET REF POINT, centre of frame
    myHero.setPosition(30, 30);           // set sprite position
    myHero.setRefPixelPosition(myHero.getRefPixelX(), myHero.getRefPixelY());
    heroStep = 5;
    myHero.setFrame(0);
    heroHit = 0;
  }

  //===========================================================================
  public void initEnemy(){
   int xPos0, yPos0;
     int xPos1, yPos1;
       int xPos2, yPos2;


   enemies = new Sprite[3];
   enemyHit = new boolean[3];
   int seq[] = new int[] { 0, 1 };
   enemies[0] = createSprite("/infant.png", 32, 32);
   enemies[1] = createSprite("/thief.png", 32, 32);
   enemies[2] = createSprite("/wizard.png", 32, 32);

   xPos0 = getWidth() - enemies[0].getWidth();
 yPos0 = 0 * (enemies[0].getHeight());
 enemies[0].setPosition(xPos0, yPos0); // set sprite position
      xPos1 = getWidth() - enemies[1].getWidth();
 yPos1 = 1 * (enemies[1].getHeight());
 enemies[1].setPosition(xPos1, yPos1); // set sprite position
      xPos2 = getWidth() - enemies[0].getWidth();
  yPos2 = 2* (enemies[2].getHeight());
  enemies[2].setPosition(xPos2, yPos2); // set sprite position



     for (int i=0; i< enemies.length; i++){
     enemies[i].setFrameSequence(seq); // SET frame sequence
     enemies[i].defineReferencePixel(16, 16); // SET REF POINT, centre of frame


     enemies[i].setRefPixelPosition(enemies[i].getRefPixelX(), enemies[i].getRefPixelY());
     enemyStep = 2;
     enemies[i].setFrame(0);
     enemyHit[i] = false;
   }
 }


  //===========================================================================
  public void initCanvas(){
    try{
      lm = new LayerManager();
      explodeImg = Image.createImage("/explode.png");


      heroImg = Image.createImage("/trooper.png");
      initHero();
      lm.append(myHero);

      enemyImg = new Image[3];
      enemyImg[0] = Image.createImage("/infant.png");
      enemyImg[1] = Image.createImage("/thief.png");
      enemyImg[2] = Image.createImage("/wizard.png");
      initEnemy();
      for (int i=0; i< enemies.length; i++){
        lm.append(enemies[i]);
      }



    }catch (Exception e) {
      System.out.println("Exceiption here" + e.getMessage());
      e.printStackTrace();
    }
  }   // end-of  initHero()

  //===========================================================================
  public void getInput() {
    int keystate = getKeyStates();
    switch(keystate){
      case UP_PRESSED:     // R=0, D=1, L=2, U=3
        if (co1==1){
          if (!(heroDir==1))
   heroDir = 1;
 myHero.setPosition(myHero.getX(), myHero.getY() + heroStep);
        }
  if (co1==0){
    if (! (heroDir == 3))
      heroDir = 3;
    myHero.setPosition(myHero.getX(), myHero.getY() - heroStep);
  }
        break;
      case DOWN_PRESSED:
        if (co1==1){
          if (!(heroDir==3))
            heroDir = 3;
          myHero.setPosition(myHero.getX(), myHero.getY() - heroStep);
  }
  if (co1==0){
    if (! (heroDir == 1))
      heroDir = 1;
    myHero.setPosition(myHero.getX(), myHero.getY() + heroStep);
  }
        break;
      case LEFT_PRESSED:    // R=0, D=1, L=2, U=3
        if (co1==1){
          if (! (heroDir == 0)) {
            heroDir = 0;
            myHero.setTransform(Sprite.TRANS_NONE);
          }
          myHero.setPosition(myHero.getX() + heroStep, myHero.getY());

  }
if (co1==0){
    if (! (heroDir == 2)) {
      heroDir = 2;
      myHero.setTransform(Sprite.TRANS_MIRROR);
    }
    myHero.setPosition(myHero.getX() - heroStep, myHero.getY());
  }
        break;
      case RIGHT_PRESSED:
        if (co1==1){
          if (!(heroDir==2)){
  heroDir = 2;
  myHero.setTransform(Sprite.TRANS_MIRROR);
}
myHero.setPosition(myHero.getX() - heroStep, myHero.getY());
  }
if(co1==0){
    if (! (heroDir == 0)) {
      heroDir = 0;
      myHero.setTransform(Sprite.TRANS_NONE);
    }
    myHero.setPosition(myHero.getX() + heroStep, myHero.getY());
  }
        break;
      case GAME_A_PRESSED:  // the num_7_key
        if (playSound==false)
          playSound=true;
        else
          playSound=false;
        playMIDI();
        break;

    }
  }  // end-of  getInput()


  private Sprite createSprite(String imgPath, int fWidth, int fHeight) {
    Image img = null;
    try {
      img = Image.createImage(imgPath);
    } catch (Exception e) {
      System.out.println("Error create Sprite");
    }
    return new Sprite(img, fWidth, fHeight);
  }

  //==========================================================================


  //==========================================================================




  //===========================================================================
  public void clearScreen(Graphics g){
    g.setColor(255,255,255);
    g.fillRect(0, 0, getWidth(), getHeight());
  }

  //===========================================================================
  public void drawGraphics(Graphics g) {
    clearScreen(g);
    if( myHero.isVisible() ){
      myHero.setPosition(myHero.getX(), myHero.getY());
      myHero.nextFrame();
    }


    if(co1==1){
      g.drawImage(xxx_img, myHero.getX() + 5, myHero.getY() - 10, 0);
    }

    for (int i = 0; i < enemies.length; i++) {
      enemies[i].setPosition(enemies[i].getX(), enemies[i].getY());
      enemies[i].setTransform(Sprite.TRANS_MIRROR);
      enemies[i].nextFrame();
    }
g.setColor(255, 0, 255);
    lm.paint(g, 0, 0);
    g.drawString("S:"+ score, 15, 195, Graphics.TOP |
        Graphics.HCENTER);
    if(co0==0){
      g.drawImage(enemyImg[0], 110, 30, 0);
    }
    if(co0==1){
   g.drawImage(enemyImg[1], 110, 30, 0);
 }
 if(co0==2){
   g.drawImage(enemyImg[2], 110, 30, 0);
 }




    flushGraphics();
  }

  //===========================================================================


  //===========================================================================
  public void updateEnemyPos(){
   int xPos0 , yPos0;
 int xPos1 , yPos1;
  int xPos2 , yPos2;

if (di0==0){
    xPos0 = enemies[0].getX()- 4;
     yPos0 = enemies[0].getY()- 4;
}
else if (di0==1){
    xPos0 = enemies[0].getX()- 4;
     yPos0 = enemies[0].getY()+ 4;
}

else{
     xPos0 = enemies[0].getX() - 4;
     yPos0 = enemies[0].getY() - 4;

   }
   if (yPos0<0){
   di0=1;
}
 if (yPos0>getHeight()){
di0=0;
}
 if (xPos0<0){
   xPos0 = getWidth();
   if( heroHit>0 ){
     heroHit = 0;
     myHero.setVisible(true);     // make the Hero visible again
     myHero.setImage(heroImg, 32, 32);
   }
   if (enemyHit[0] == true){
     enemyHit[0] = false;
     enemies[0].setVisible(true); // make the enemy visible again
     enemies[0].setImage(enemyImg[0], 32, 32);
  }
 }

 if (di1==0){
     xPos1 = enemies[1].getX()- 10;

 }
 else if (di1==1){
     xPos1 = enemies[1].getX()+ 10;

 }
 else{
      xPos1 = enemies[1].getX() - 10;
    }
    if (xPos1<0){
    di1=1;
    if (enemyHit[1] == true){
  enemyHit[1] = false;
  enemies[1].setVisible(true); // make the enemy visible again
  enemies[1].setImage(enemyImg[1], 32, 32);
}

 }
  if (xPos1>getWidth()){
 di1=0;
 }
 if (di2==0){
       yPos1 = enemies[1].getY()- 2;
 }
 else if (di2==1){
      yPos1 = enemies[1].getY()+2;
 }
 else{
      yPos1 = enemies[1].getY() + 2;
    }
    if (yPos1<0){
    di2=1;
 }
  if (yPos1>getHeight()){
 di2=0;


 }
 if (di3==0){
     xPos2 = enemies[2].getX()- 4;
      yPos2 = enemies[2].getY()+ 6;
 }
 else if (di3==1){
     xPos2 = enemies[2].getX()+ 4 ;
      yPos2 = enemies[2].getY()+ 6;
 }

 else{
   xPos2 = enemies[2].getX()- 4;
      yPos2 = enemies[2].getY()+ 6;

    }
    if (xPos2<0){
    di3=1;
    if (co1==1){
      co1=0;
    }
 }
  if (xPos2>getWidth()){
 di3=0;
 }
  if (yPos2>getHeight()){
    yPos2=0;
    if (enemyHit[2] == true){
  enemyHit[2] = false;
  enemies[2].setVisible(true); // make the enemy visible again
  enemies[2].setImage(enemyImg[2], 32, 32);
}

  }



     //-------- 1234 start ------------------

       for (int i = 0; i < enemies.length; i++) {
     //-------- 1234 end --------------------
    }
     enemies[0].setPosition(xPos0, yPos0);
     enemies[1].setPosition(xPos1, yPos1);
     enemies[2].setPosition(xPos2, yPos2);
     for (int i = 0; i < enemies.length; i++) {

     enemies[i].setTransform(Sprite.TRANS_MIRROR);
     if (enemyHit[i]==true){
       enemies[i].setVisible(false);   // make the enemy invisible
     }
     //---------------------------------------
     if (heroHit > 0){
       if (heroHit < 10)
         heroHit++;
       if (heroHit > 2){
         myHero.setVisible(false);   // make the Hero invisible
       }
     }
     // --- check collision between enemy & hero --- start ----

     // --- check collision between enemy & hero --- end ------

   }  // end-of for-loop of i
   if(enemies[0].collidesWith(myHero, true)){
     if(co0==1){
    co1=1;
    score--;
  }
  if(co0==2){
co1=0;
     score++;
}

     enemyHit[0] = true;
     co0=0;
     enemies[0].setImage(explodeImg, explodeImg.getWidth(), explodeImg.getHeight());

   }
   if(enemies[1].collidesWith(myHero, true)){
     if(co0==2){
co1=1;
        score--;
}
if(co0==0){
co1=0;
        score++;
}

     enemyHit[1] = true;
     co0=1;
     enemies[1].setImage(explodeImg, explodeImg.getWidth(), explodeImg.getHeight());


   }
   if(enemies[2].collidesWith(myHero, true)){
     if(co0==0){
co1=1;
        score--;
}
if(co0==1){
co1=0;
        score++;
}

     enemyHit[2] = true;
     co0=2;
     enemies[2].setImage(explodeImg, explodeImg.getWidth(), explodeImg.getHeight());


   }

 }


  //===========================================================================
  public void run(){
    Graphics g = getGraphics();
    while (gameParent.running){
      // game running
 //System.out.println("c00:"+co0+"c01111:"+co1);
      updateEnemyPos();
      getInput();
      drawGraphics(g);
      try{
        Thread.sleep(millPerTick);
      } catch (InterruptedException e){
      }
    }  // end-of while-loop
  }  // end-of run()

  //===========================================================================
  public void playMIDI() {
    try {
      if (player == null) {
        InputStream is = getClass().getResourceAsStream("/MugDout.mid");
        player = Manager.createPlayer(is, "audio/midi");
       }
       if (playSound==true){
         player.start();
       }else{
         player.stop();
       }
    } catch (Exception e) {
    }
  }


}  // end-of ActionGameCanvas