Android Open Source - DroidRunJump Droid

• Back to Game/simple  ↑

From Project

Back to project page DroidRunJump.

License

The source code is released under:

"Droid-Run-Jump" Copyright (c) 2011 Donald E. Llopis <machinezilla@gmail.com> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentati...

Java Source Code

package com.android.sofla.drj;
// w  ww.  ja v  a2 s . c o  m
import android.content.SharedPreferences;
import android.graphics.Canvas;
import android.graphics.RectF;

class Droid {

  float x;
  float y;
  float vy;
  boolean jumping;
  boolean falling;
  
  float w;
  float h;
  
  final float startX = 380.0f;
  final float startY = 352.5f;
  final float initialVelocity = 15.0f;
  
  Game game;

  //
  // workshop 2
  //
  
  RectF rect;
  
  int curFrame;
  long curFrameTime = 0;
  
  // -- END workshop 2

  public Droid(Game game) {
    this.game = game;
    
    //
    // workshop 2
    //
    this.rect = new RectF();
    
    w = game.droidJumpImage.getWidth();
    h = game.droidJumpImage.getHeight();
    
    // -- END workshop 2
    
    reset();
  }

  public void reset() {
    
    jumping = false;
    falling = false;
    
    x = startX;
    y = startY;
    
    rect.left = x;
    rect.top = y;
    rect.bottom = y + h;
    rect.right = x + w;
    
    curFrame = 0;
    curFrameTime = System.currentTimeMillis();
  }

  public void update() {

    //
    // first: handle collision detection with pastry and potholes
    //    
    doCollisionDetection();


    //
    // handle falling
    //
    if (falling) {
      doPlayerFall();
    }

    //
    // handle jumping
    //
    if (jumping) {
      doPlayerJump();
    }

    //
    // does player want to jump?
    //
    if (game.playerTap && !jumping && !falling) {
      startPlayerJump();
      game.soundPool.play(game.droidJumpSnd, 1.0f, 1.0f, 0, 0, 1.0f);
    }
    
    //
    // workshop 2
    //
    
    //
    // update animation
    //
    long now = System.currentTimeMillis() - curFrameTime;
    if (now > 250) {
      curFrame++;
      if (curFrame > 3) {
        curFrame = 1;
      }
      curFrameTime = System.currentTimeMillis();
    }
    
    // -- END workshop 2
  }

  public void draw(Canvas canvas) {
    //canvas.drawRect(x, y, x + w, y + h, game.greenPaint);
    
    //
    // workshop 2
    //

    if (jumping || falling) {
      canvas.drawBitmap(game.droidJumpImage, x, y, game.clearPaint);
    }
    else {
      canvas.drawBitmap(game.droidImages[curFrame], x, y, game.clearPaint);
    }
    
    // -- END workshop 2
  }
  
  //
  // helper methods for workshop - not to be implemented by participants
  //
  private void doCollisionDetection() {

    float ey = y + h;

    for (Pothole p : game.potholes) {
      if (!p.alive) {
        continue;
      }

      float lx = x;
      float rx = x + w;

      if (
          // am I over the pothole?
          (p.x < lx) 
          
          // am I still inside the pothole?
          && ((p.x + p.w) > rx) 
          
          // have I fallen into the pothole?
          && (p.y <= ey)
        
        ) {
        
        game.initGameOver();        
      }
    }
    
    //
    // workshop 2
    //
    
    //
    // check for pastry collision
    //
    rect.left = x;
    rect.top = y;
    rect.bottom = y + h;
    rect.right = x + w;
    
    if (game.pastry.alive && rect.intersect(game.pastry.rect)) {
      game.doPlayerEatPastry();      
    }
    
    // -- END workshop 2
  }
  
  private void doPlayerFall() {
    vy += 1.0f;
    y += vy;
    float tmpY = y + h;
    if (tmpY > game.groundY) {
      y = startY;
      falling = false;
    }    
  }
  
  private void doPlayerJump() {
    y -= vy;
    vy -= 1.0f;
    if (vy <= 0.0f) {
      jumping = false;
      falling = true;
    }    
  }
  
  private void startPlayerJump() {
    jumping = true;
    game.playerTap = false;
    vy = initialVelocity;    
  }
  
  //
  // workshop 2
  //

  public void restore(SharedPreferences savedState) {
    x = savedState.getFloat("droid_x", 0);
    y = savedState.getFloat("droid_y", 0);
    vy = savedState.getFloat("droid_vy", 0);
    jumping = savedState.getBoolean("droid_jumping", false);
    falling = savedState.getBoolean("droid_falling", false);      
    curFrame = savedState.getInt("droid_curFrame", 0);
    curFrameTime = savedState.getLong("droid_curFrameTime",0 );    
  }
  
  public void save(SharedPreferences.Editor map) {
    map.putFloat("droid_x", x);
    map.putFloat("droid_y", y);
    map.putFloat("droid_vy", vy);
    map.putBoolean("droid_jumping", jumping);
    map.putBoolean("droid_falling", falling);
    map.putInt("droid_curFrame", curFrame);
    map.putLong("droid_curFrameTime", curFrameTime);
  }
  
  // -- END workshop 2
}

Java Source Code List

• Back to Game/simple  ↑