Android平台2D游戏简单实例

     基于Android平台开发小游戏的首次尝试,通过自己设计的简易android框架,实现的简单2D壁球游戏。    <pre class="brush:java; toolbar: true; auto-links: false;">package com.tabletennis.main;  import android.app.Activity; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.Typeface; import android.view.KeyEvent; import android.view.SurfaceHolder; import android.view.SurfaceHolder.Callback; import android.view.SurfaceView; import android.view.View;  public class MySurfaceView extends SurfaceView implements Callback,Runnable {  private SurfaceHolder sfh;  private Thread th;  private Canvas canvas;  private Paint paint;  private int ScreenW,ScreenH;  //ball informationetContentView  private int moveSpeedX=10;  private int moveSpeedY=10;  private int tempSpeedX=moveSpeedX;  private int tempSpeedY=moveSpeedY;  private int head_left=21;  private int head_top=41;  private int radius=10;//半径  private int ball_score=100;  //Bat information  private int bat_left=10;  private int bat_right=10;  private int bat_width=55;  private int bat_ply=5;  private int bat_move_speed=16;  private int ball_color=Color.WHITE;  //Process information  private int refresh_circle_time=50;  //Game status  private int score=0;  private int score_count=0;  private double time=0.0;  private boolean show_score=false;  private int game_status=GameStatus.GAME_READY;  private int chances=0;  //Window variabele  int off_count=1;    private Activity main_activity;  public MySurfaceView(Context context) {   super(context);   // TODO Auto-generated constructor stub   main_activity=(Activity) context;   sfh = this.getHolder();   sfh.addCallback(this);   paint=new Paint();   paint.setAntiAlias(true);   paint.setColor(Color.WHITE);   paint.setTextSize(16);   this.setKeepScreenOn(true);// 保持屏幕常亮     setFocusable(true);   th=new Thread(this);  }    @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {   // TODO Auto-generated method stub   if(game_status==GameStatus.GAME_NEW){    if(keyCode==KeyEvent.KEYCODE_DPAD_UP){    game_status=GameStatus.GAME_READY;    drawReadyWindow();    }   }   if(game_status==GameStatus.GAME_OVER){    if(keyCode==KeyEvent.KEYCODE_DPAD_UP){     init_game_data();     game_status=GameStatus.GAME_READY;     drawReadyWindow();    }   }      if(game_status==GameStatus.GAME_PAUSED){    //drawPausedWindow();    /*     * 显示快捷键菜单，并提示游戏已经ready     * */    if(keyCode==KeyEvent.KEYCODE_DPAD_RIGHT||keyCode==KeyEvent.KEYCODE_DPAD_LEFT||keyCode==KeyEvent.KEYCODE_DPAD_DOWN){     game_status=GameStatus.GAME_ON;    }else if(keyCode==KeyEvent.KEYCODE_DPAD_UP){     init_game_data();     drawReadyWindow();     game_status=GameStatus.GAME_READY;    }   }      if(game_status==GameStatus.GAME_READY){    //drawPausedWindow();    /*     * 显示快捷键菜单，并提示游戏已经ready     */    if(keyCode==KeyEvent.KEYCODE_DPAD_RIGHT||keyCode==KeyEvent.KEYCODE_DPAD_LEFT){     game_status=GameStatus.GAME_ON;    }else if(keyCode==KeyEvent.KEYCODE_DPAD_DOWN){     game_status=GameStatus.GAME_OFF;      };   }         if(game_status==GameStatus.GAME_ON){    if(keyCode==KeyEvent.KEYCODE_DPAD_RIGHT){     if(bat_left+bat_width<ScreenW-5){      bat_left+=bat_move_speed;      bat_right=ScreenW-bat_left;     }    }else if(keyCode==KeyEvent.KEYCODE_DPAD_LEFT){     if(bat_left>5){      bat_left-=bat_move_speed;      bat_right=ScreenW-bat_left;     }    }else if(keyCode==KeyEvent.KEYCODE_DPAD_DOWN){     game_status=GameStatus.GAME_PAUSED;    }   }   return super.onKeyDown(keyCode, event);  }  private void drawRectFrame(Canvas canvas,Paint paint,int margin_left,int margin_right,int margin_top,int margin_bottom){   canvas.drawLine(margin_left, margin_top, margin_left,ScreenH-margin_bottom, paint);   canvas.drawLine(margin_left,margin_top,ScreenW-margin_right,margin_top,paint);   canvas.drawLine(ScreenW-margin_right,ScreenH-margin_bottom,ScreenW-margin_right,margin_top,paint);   canvas.drawLine(margin_left,ScreenH-margin_bottom,ScreenW-margin_right,ScreenH-margin_bottom,paint);     }  private void drawGameMonitor(Canvas canvas,Paint paint){   paint.setColor(Color.WHITE);   drawRectFrame(canvas,paint,10,10,ScreenH-40,10);   paint.setTextSize(18);   canvas.drawText("Time:"+(int)time, 20,ScreenH-20 , paint);   canvas.drawText("Score:"+score, 110,ScreenH-20 , paint);   canvas.drawText("Chances: "+chances, 200,ScreenH-20 , paint);   paint.setTextSize(16);  }  private void drawMainWindow(){    try{     canvas=sfh.lockCanvas();     Paint ball_paint=new Paint();     ball_paint.setAntiAlias(true);     ball_paint.setColor(ball_color);          canvas.drawColor(Color.DKGRAY);       canvas.drawLine(0,0,ScreenW/5-20,ScreenH/5-20,ball_paint);     canvas.drawLine(ScreenW,0,4*ScreenW/5+20,ScreenH/5-20,ball_paint);     canvas.drawLine(ScreenW/5-20,ScreenH/5-20,4*ScreenW/5+20,ScreenH/5-20,ball_paint);     canvas.drawLine(ScreenW/5-20,ScreenH/5-20,0,ScreenH,ball_paint);     canvas.drawLine(ScreenW*4/5+20,ScreenH/5-20,ScreenW,ScreenH,ball_paint);     canvas.drawCircle(head_left, head_top, radius, ball_paint);     canvas.drawRect(bat_left,ScreenH-bat_ply-100,bat_left+bat_width,ScreenH-90, paint);          paint.setColor(Color.RED);     canvas.drawLine(0, ScreenH-bat_ply-100, ScreenW, ScreenH-bat_ply-100, paint);     drawGameMonitor(canvas,paint);     paint.setColor(Color.RED);     //canvas.drawLine(0, ScreenH-92, ScreenW, ScreenH-92, paint);     head_left+=moveSpeedX;     head_top+=moveSpeedY;     paint.setColor(Color.WHITE);     if(show_score){      ball_paint.setTextSize(50);      canvas.drawText("+"+ball_score, ScreenW/2-50, ScreenH/2, ball_paint);     }     //paint.setColor(Color.WHITE);      if(head_left>=ScreenW-2*radius-20){      //Right edge      moveSpeedX*=-1;      show_score=false;      head_left=ScreenW-2*radius-20;     }         if(head_left<=20){      //Left edge      moveSpeedX*=-1;      show_score=false;      head_left=20;     }     if(head_top<=40){      //Top edge      moveSpeedY*=-1;      randomBallData();      show_score=false;      head_top=40;           }     if(head_top>=ScreenH-2*radius-100){      float ball_current_pos=(float)(head_left+radius);       if(ball_current_pos>=bat_left&&ball_current_pos<=bat_left+bat_width){       tempSpeedX=moveSpeedX;       tempSpeedY=moveSpeedY;       moveSpeedY*=-1;       score+=ball_score;       show_score=true;       score_count=100;      }else{       chances--;       if(chances>0){        game_status=GameStatus.GAME_CHANCES;        head_left=(int)(Math.random()*ScreenW-2*radius-20);        head_top=41;        if(head_left<=20){         head_left=21;        }        randomBallData();       }else        game_status=GameStatus.GAME_OVER;      }      }              }catch(Exception e){     e.printStackTrace();    }finally{     if(canvas!=null){      sfh.unlockCanvasAndPost(canvas);         }     }  }  private void drawPausedWindow() {   // TODO Auto-generated method stub     try{      canvas=sfh.lockCanvas();      paint.setColor(Color.WHITE);      canvas.drawColor(Color.DKGRAY);      drawRectFrame(canvas,paint,50,50,100,220);      Paint title_paint=new Paint();      title_paint.setTextSize(20);      title_paint.setAntiAlias(true);      title_paint.setColor(Color.YELLOW);      canvas.drawText("Game is paused!",78, 160, title_paint);      canvas.drawText("Press any key to continue", 70, 200, paint);     }catch(Exception e){      e.printStackTrace();     }finally{      if(canvas!=null){       sfh.unlockCanvasAndPost(canvas);          }          }  }  private void drawReadyWindow(){   // TODO Auto-generated method stub   try{    canvas=sfh.lockCanvas();    paint.setColor(Color.WHITE);    canvas.drawColor(Color.DKGRAY);    Paint title_paint=new Paint();    //canvas.drawRect(50, 100, 200, 200, paint);    drawRectFrame(canvas,paint,10,10,10,10);    //drawRectFrame(canvas,paint,20,20,20,20);    canvas.drawText("WELCOME TO PAY MY GAME", 50, 100, paint);    canvas.drawText("------Copyright by Skyrain-------", 42, 300, paint);    title_paint.setTextSize(35);    title_paint.setAntiAlias(true);    title_paint.setColor(Color.WHITE);     title_paint.setTypeface(Typeface.SANS_SERIF);    canvas.drawText("Tennis Game", 55, 250, title_paint);    Resources res=getResources();    Bitmap bmp=BitmapFactory.decodeResource(res, R.drawable.icon);    canvas.drawBitmap(bmp, 120,150, title_paint);    paint.setTextSize(10);    canvas.drawText("************************", 80, 350, paint);    canvas.drawText("*  [Left]or[Right]:  Start/Move", 80, 365, paint);    canvas.drawText("*", 220, 365, paint);    canvas.drawText("*  [Down]:            Exit", 80, 380, paint);    canvas.drawText("*", 220, 380, paint);    canvas.drawText("************************", 80, 395, paint);    //Thread.sleep(3000);    //game_status=GameStatus.GAME_READY;    paint.setTextSize(16);   }catch(Exception e){    e.printStackTrace();   }finally{    if(canvas!=null){     sfh.unlockCanvasAndPost(canvas);       }    }  }  private void drawOffWindow() {   // TODO Auto-generated method stub   if(off_count==7){    main_activity.finish();   }   try{    canvas=sfh.lockCanvas();    paint.setColor(Color.WHITE);    canvas.drawColor(Color.DKGRAY);    drawRectFrame(canvas,paint,50,50,100,250);    Paint title_paint=new Paint();    title_paint.setTextSize(20);    title_paint.setAntiAlias(true);    title_paint.setColor(Color.RED);    canvas.drawText("Game is Exiting", 93, 140, title_paint);    title_paint.setColor(Color.GREEN);    for(int i=0;i<off_count;i++){     canvas.drawCircle(80+i*28, 160, 5, title_paint);    }     off_count++;   }catch(Exception e){    e.printStackTrace();   }finally{    if(canvas!=null){     sfh.unlockCanvasAndPost(canvas);        }    }  }    private void drawOverWindow() {   // TODO Auto-generated method stub   try{    canvas=sfh.lockCanvas();    paint.setColor(Color.WHITE);    canvas.drawColor(Color.DKGRAY);    drawRectFrame(canvas,paint,50,50,100,200);    Paint title_paint=new Paint();    title_paint.setTextSize(20);    title_paint.setAntiAlias(true);    title_paint.setColor(Color.YELLOW);    canvas.drawText("Your Total Score", 90, 140, title_paint);    //canvas.drawText("[YOUR SCORE]: 0000", 100, 150, paint);    //paint.setColor(Color.RED);    //canvas.drawText("[score] ", 130, 170, paint);    title_paint.setTextSize(43);    title_paint.setColor(Color.RED);    canvas.drawText(""+score, 120, 195, title_paint);    paint.setColor(Color.WHITE);    canvas.drawText("Press [UP] to continue", 80, 230, paint);   }catch(Exception e){    e.printStackTrace();   }finally{    if(canvas!=null){     sfh.unlockCanvasAndPost(canvas);        }    }  }    private void drawChancesWindow() {   // TODO Auto-generated method stub   try{    canvas=sfh.lockCanvas();    paint.setColor(Color.WHITE);    canvas.drawColor(Color.DKGRAY);    drawRectFrame(canvas,paint,15,15,120,200);    Paint title_paint=new Paint();    title_paint.setTextSize(20);    title_paint.setAntiAlias(true);    title_paint.setColor(Color.YELLOW);    canvas.drawText("You have          chances left!", 35, 210, title_paint);    title_paint.setTextSize(50);    title_paint.setColor(Color.RED);    canvas.drawText(""+chances,130,220,title_paint);   }catch(Exception e){    e.printStackTrace();   }finally{    if(canvas!=null){     sfh.unlockCanvasAndPost(canvas);        }    }  }  private void init_game_data() {   // TODO Auto-generated method stub   head_left=(int)(Math.random()*ScreenW-2*radius-20);   head_top=41;   if(head_left<=20){    head_left=21;   }   randomBallData();   bat_left=ScreenW/2;   score=0;   chances=3;  }    @Override  public boolean onKeyUp(int keyCode, KeyEvent event) {   // TODO Auto-generated method stub   return super.onKeyUp(keyCode, event);  }  public void draw() throws InterruptedException{      if(game_status==GameStatus.GAME_ON){    drawMainWindow();   }else if(game_status==GameStatus.GAME_OVER){      drawOverWindow();   }else if(game_status==GameStatus.GAME_PAUSED){    drawPausedWindow();   }else if(game_status==GameStatus.GAME_OFF){    drawOffWindow();    try {     Thread.sleep(500);     //main_activity.finish();    } catch (InterruptedException e) {     // TODO Auto-generated catch block     e.printStackTrace();    }   }else if(game_status==GameStatus.GAME_CHANCES){    drawChancesWindow();    Thread.sleep(2000);    game_status=GameStatus.GAME_ON;   }     }     @Override  public void run() {   // TODO Auto-generated method stub   while(true){    time+=0.1;    try{     draw();     Thread.sleep(refresh_circle_time);     //Thread.sleep(100000);    }catch(InterruptedException e){      e.printStackTrace();     }    }  }  private void randomBallData(){      int x=moveSpeedX/Math.abs(moveSpeedX);   int y=moveSpeedY/Math.abs(moveSpeedY);   ball_score=(int)(Math.random()*100);   if(ball_score==0){    ball_score=100;   }   if(ball_score<30){    ball_color=Color.LTGRAY;    moveSpeedX=12;    moveSpeedY=12;   }else if(ball_score>=30&&ball_score<50){    ball_color=Color.WHITE;    moveSpeedX=14;    moveSpeedY=14;   }else if(ball_score>=50&&ball_score<70){    ball_color=Color.YELLOW;    moveSpeedX=16;    moveSpeedY=16;   }else if(ball_score>=70&&ball_score<90){    ball_color=Color.BLUE;    moveSpeedX=18;    moveSpeedY=18;   }else if(ball_score>=90&&ball_score<=100){    ball_color=Color.RED;    moveSpeedX=20;    moveSpeedY=20;   }   moveSpeedX*=x;   moveSpeedY*=y;     }  @Override  public void surfaceChanged(SurfaceHolder holder, int format, int width,    int height) {   // TODO Auto-generated method stub  }   @Override  public void surfaceCreated(SurfaceHolder holder) {   // TODO Auto-generated method stub   init_game_data();   ScreenW=this.getWidth();   ScreenH=this.getHeight();   head_left=21;   head_top=41;   bat_left=21;   bat_right=ScreenW-bat_left;   drawReadyWindow();   th.start();  }    @Override  public void surfaceDestroyed(SurfaceHolder holder) {   // TODO Auto-generated method stub     }  }</pre>