首页 > 代码库 > Android apps浅析01-Amazed：一个简单但令人上瘾的加速度为基础的大理石指导游戏。
Android apps浅析01-Amazed：一个简单但令人上瘾的加速度为基础的大理石指导游戏。
Android apps浅析01-Amazed：一个简单但令人上瘾的加速度为基础的大理石指导游戏。
这个例子中只有4个类，一个绘制大理石类Marble，一个绘制迷宫类Maze，一个Amazed视图类，一个Amazed活动类
1. 绘制大理石类Marble通过Canvas和Paint绘制，同时提供移动x轴和y轴坐标的方法，每个大理石都有一个状态值：活的/死的
/*
* Copyright (C) 2008 Jason Tomlinson.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.amazed;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;
/**
* Marble drawn in the maze.迷宫中的大理石绘制
*/
public class Marble {
// View controlling the marble.
private View mView;
// marble attributes
// x,y are private because we need boundary checking on any new values to
// make sure they are valid.
private int mX = 0;
private int mY = 0;
private int mRadius = 8;
private int mColor = Color.WHITE;
private int mLives = 5;
/**
* Marble constructor.
*
* @param view
* View controlling the marble
*/
public Marble(View view) {
this.mView = view;
init();
}
/**
* Setup marble starting co-ords.
*/
public void init() {
mX = mRadius * 6;
mY = mRadius * 6;
}
/**
* Draw the marble.
*
* @param canvas
* Canvas object to draw too.
* @param paint
* Paint object used to draw with.
*/
public void draw(Canvas canvas, Paint paint) {
paint.setColor(mColor);
canvas.drawCircle(mX, mY, mRadius, paint);
}
/**
* Attempt to update the marble with a new x value, boundary checking
* enabled to make sure the new co-ordinate is valid.
*
* @param newX
* Incremental value to add onto current x co-ordinate.
*/
public void updateX(float newX) {
mX += newX;
// boundary checking, don‘t want the marble rolling off-screen.
if (mX + mRadius >= mView.getWidth())
mX = mView.getWidth() - mRadius;
else if (mX - mRadius < 0)
mX = mRadius;
}
/**
* Attempt to update the marble with a new y value, boundary checking
* enabled to make sure the new co-ordinate is valid.
*
* @param newY
* Incremental value to add onto current y co-ordinate.
*/
public void updateY(float newY) {
mY -= newY;
// boundary checking, don‘t want the marble rolling off-screen.
if (mY + mRadius >= mView.getHeight())
mY = mView.getHeight() - mRadius;
else if (mY - mRadius < 0)
mY = mRadius;
}
/**
* Marble has died
*/
public void death() {
mLives--;
}
/**
* Set the number of lives for the marble
*
* @param Number
* of lives
*/
public void setLives(int val) {
mLives = val;
}
/**
* @return Number of lives left
*/
public int getLives() {
return mLives;
}
/**
* @return Current x co-ordinate.
*/
public int getX() {
return mX;
}
/**
* @return Current y co-ordinate.
*/
public int getY() {
return mY;
}
}
2. 绘制迷宫类Maze绘制一个20列26行的长方形，提供加载背景和数据以及等级的方法，同样通过Canvas和Paint绘制，另外需要提供（x，y）坐标上的大理石数据是活的还是死的
/*
* Copyright (C) 2008 Jason Tomlinson.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.amazed;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Field;
import android.app.Activity;
import android.content.Context;
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.util.Log;
/**
* Maze drawn on screen, each new level is loaded once the previous level has
* been completed.屏幕上迷宫绘制，一旦前一个级别完成后，每个新级别会被加载。
*/
public class Maze {
// maze tile size and dimension
private final static int TILE_SIZE = 16;
private final static int MAZE_COLS = 20;
private final static int MAZE_ROWS = 26;
// tile types
public final static int PATH_TILE = 0;
public final static int VOID_TILE = 1;
public final static int EXIT_TILE = 2;
// tile colors
private final static int VOID_COLOR = Color.BLACK;
// maze level data
private static int[] mMazeData;
// number of level
public final static int MAX_LEVELS = 10;
// current tile attributes
private Rect mRect = new Rect();
private int mRow;
private int mCol;
private int mX;
private int mY;
// tile bitmaps
private Bitmap mImgPath;
private Bitmap mImgExit;
/**
* Maze constructor.
*
* @param context
* Application context used to load images.
*/
Maze(Activity activity) {
// load bitmaps.
mImgPath = BitmapFactory.decodeResource(activity.getApplicationContext().getResources(),
R.drawable.path);
mImgExit = BitmapFactory.decodeResource(activity.getApplicationContext().getResources(),
R.drawable.exit);
}
/**
* Load specified maze level.
*
* @param activity
* Activity controlled the maze, we use this load the level data
* @param newLevel
* Maze level to be loaded.
*/
void load(Activity activity, int newLevel) {
// maze data is stored in the assets folder as level1.txt, level2.txt
// etc....
String mLevel = "level" + newLevel + ".txt";
InputStream is = null;
try {
// construct our maze data array.
mMazeData = http://www.mamicode.com/new int[MAZE_ROWS * MAZE_COLS];>
3. Amazed视图类，自定义view用于绘制迷宫和大理石，响应加速度计的更新在屏幕上滚动的大理石，通过SensorListener和SensorManager传感器相关的类监听用户触摸的单元xyz坐标值，重载View的onDraw方法来调用游戏开始前，游戏开始中，游戏结束和游戏完成相应的绘制函数
/*
* Copyright (C) 2008 Jason Tomlinson.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.amazed;
import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.hardware.SensorListener;
import android.hardware.SensorManager;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
/**
* Custom view used to draw the maze and marble. Responds to accelerometer
* updates to roll the marble around the screen.自定义view用于绘制迷宫和大理石，响应加速度计的更新在屏幕上滚动的大理石。
*/
public class AmazedView extends View {
// Game objects
private Marble mMarble;
private Maze mMaze;
private Activity mActivity;
// canvas we paint to.
private Canvas mCanvas;
private Paint mPaint;
private Typeface mFont = Typeface.create(Typeface.SANS_SERIF, Typeface.BOLD);
private int mTextPadding = 10;
private int mHudTextY = 440;
// game states
private final static int NULL_STATE = -1;
private final static int GAME_INIT = 0;
private final static int GAME_RUNNING = 1;
private final static int GAME_OVER = 2;
private final static int GAME_COMPLETE = 3;
private final static int GAME_LANDSCAPE = 4;
// current state of the game
private static int mCurState = NULL_STATE;
// game strings
private final static int TXT_LIVES = 0;
private final static int TXT_LEVEL = 1;
private final static int TXT_TIME = 2;
private final static int TXT_TAP_SCREEN = 3;
private final static int TXT_GAME_COMPLETE = 4;
private final static int TXT_GAME_OVER = 5;
private final static int TXT_TOTAL_TIME = 6;
private final static int TXT_GAME_OVER_MSG_A = 7;
private final static int TXT_GAME_OVER_MSG_B = 8;
private final static int TXT_RESTART = 9;
private final static int TXT_LANDSCAPE_MODE = 10;
private static String mStrings[];
// this prevents the user from dying instantly when they start a level if
// the device is tilted.
private boolean mWarning = false;
// screen dimensions
private int mCanvasWidth = 0;
private int mCanvasHeight = 0;
private int mCanvasHalfWidth = 0;
private int mCanvasHalfHeight = 0;
// are we running in portrait mode.
private boolean mPortrait;
// current level
private int mlevel = 1;
// timing used for scoring.
private long mTotalTime = 0;
private long mStartTime = 0;
private long mEndTime = 0;
// sensor manager used to control the accelerometer sensor.
private SensorManager mSensorManager;
// accelerometer sensor values.
private float mAccelX = 0;
private float mAccelY = 0;
private float mAccelZ = 0; // this is never used but just in-case future
// versions make use of it.
// accelerometer buffer, currently set to 0 so even the slightest movement
// will roll the marble.
private float mSensorBuffer = 0;
// http://code.google.com/android/reference/android/hardware/SensorManager.html#SENSOR_ACCELEROMETER
// for an explanation on the values reported by SENSOR_ACCELEROMETER.
private final SensorListener mSensorAccelerometer = new SensorListener() {
// method called whenever new sensor values are reported.
public void onSensorChanged(int sensor, float[] values) {
// grab the values required to respond to user movement.
mAccelX = values[0];
mAccelY = values[1];
mAccelZ = values[2];
}
// reports when the accuracy of sensor has change
// SENSOR_STATUS_ACCURACY_HIGH = 3
// SENSOR_STATUS_ACCURACY_LOW = 1
// SENSOR_STATUS_ACCURACY_MEDIUM = 2
// SENSOR_STATUS_UNRELIABLE = 0 //calibration required.
public void onAccuracyChanged(int sensor, int accuracy) {
// currently not used
}
};
/**
* Custom view constructor.
*
* @param context
* Application context
* @param activity
* Activity controlling the view
*/
public AmazedView(Context context, Activity activity) {
super(context);
mActivity = activity;
// init paint and make is look "nice" with anti-aliasing.
mPaint = new Paint();
mPaint.setTextSize(14);
mPaint.setTypeface(mFont);
mPaint.setAntiAlias(true);
// setup accelerometer sensor manager.
mSensorManager = (SensorManager) activity.getSystemService(Context.SENSOR_SERVICE);
// register our accelerometer so we can receive values.
// SENSOR_DELAY_GAME is the recommended rate for games
mSensorManager.registerListener(mSensorAccelerometer, SensorManager.SENSOR_ACCELEROMETER,
SensorManager.SENSOR_DELAY_GAME);
// setup our maze and marble.
mMaze = new Maze(mActivity);
mMarble = new Marble(this);
// load array from /res/values/strings.xml
mStrings = getResources().getStringArray(R.array.gameStrings);
// set the starting state of the game.
switchGameState(GAME_INIT);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
// get new screen dimensions.
mCanvasWidth = w;
mCanvasHeight = h;
mCanvasHalfWidth = w / 2;
mCanvasHalfHeight = h / 2;
// are we in portrait or landscape mode now?
// you could use bPortrait = !bPortrait however in the future who know‘s
// how many different ways a device screen may be rotated.
if (mCanvasHeight > mCanvasWidth)
mPortrait = true;
else {
mPortrait = false;
switchGameState(GAME_LANDSCAPE);
}
}
/**
* Called every cycle, used to process current game state.
*/
public void gameTick() {
// very basic state machine, makes a good foundation for a more complex
// game.
switch (mCurState) {
case GAME_INIT:
// prepare a new game for the user.
initNewGame();
switchGameState(GAME_RUNNING);
case GAME_RUNNING:
// update our marble.
if (!mWarning)
updateMarble();
break;
}
// redraw the screen once our tick function is complete.
invalidate();
}
/**
* Reset game variables in preparation for a new game.
*/
public void initNewGame() {
mMarble.setLives(5);
mTotalTime = 0;
mlevel = 0;
initLevel();
}
/**
* Initialize the next level.
*/
public void initLevel() {
if (mlevel < mMaze.MAX_LEVELS) {
// setup the next level.
mWarning = true;
mlevel++;
mMaze.load(mActivity, mlevel);
mMarble.init();
} else {
// user has finished the game, update state machine.
switchGameState(GAME_COMPLETE);
}
}
/**
* Called from gameTick(), update marble x,y based on latest values obtained
* from the Accelerometer sensor. AccelX and accelY are values received from
* the accelerometer, higher values represent the device tilted at a more
* acute angle.
*/
public void updateMarble() {
// we CAN give ourselves a buffer to stop the marble from rolling even
// though we think the device is "flat".
if (mAccelX > mSensorBuffer || mAccelX < -mSensorBuffer)
mMarble.updateX(mAccelX);
if (mAccelY > mSensorBuffer || mAccelY < -mSensorBuffer)
mMarble.updateY(mAccelY);
// check which cell the marble is currently occupying.
if (mMaze.getCellType(mMarble.getX(), mMarble.getY()) == mMaze.VOID_TILE) {
// user entered the "void".
if (mMarble.getLives() > 0) {
// user still has some lives remaining, restart the level.
mMarble.death();
mMarble.init();
mWarning = true;
} else {
// user has no more lives left, end of game.
mEndTime = System.currentTimeMillis();
mTotalTime += mEndTime - mStartTime;
switchGameState(GAME_OVER);
}
} else if (mMaze.getCellType(mMarble.getX(), mMarble.getY()) == mMaze.EXIT_TILE) {
// user has reached the exit tiles, prepare the next level.
mEndTime = System.currentTimeMillis();
mTotalTime += mEndTime - mStartTime;
initLevel();
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// we only want to handle down events .
if (event.getAction() == MotionEvent.ACTION_DOWN) {
if (mCurState == GAME_OVER || mCurState == GAME_COMPLETE) {
// re-start the game.
mCurState = GAME_INIT;
} else if (mCurState == GAME_RUNNING) {
// in-game, remove the pop-up text so user can play.
mWarning = false;
mStartTime = System.currentTimeMillis();
}
}
return true;
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// quit application if user presses the back key.
if (keyCode == KeyEvent.KEYCODE_BACK)
cleanUp();
return true;
}
@Override
public void onDraw(Canvas canvas) {
// update our canvas reference.
mCanvas = canvas;
// clear the screen.
mPaint.setColor(Color.WHITE);
mCanvas.drawRect(0, 0, mCanvasWidth, mCanvasHeight, mPaint);
// simple state machine, draw screen depending on the current state.
switch (mCurState) {
case GAME_RUNNING:
// draw our maze first since everything else appears "on top" of it.
mMaze.draw(mCanvas, mPaint);
// draw our marble and hud.
mMarble.draw(mCanvas, mPaint);
// draw hud
drawHUD();
break;
case GAME_OVER:
drawGameOver();
break;
case GAME_COMPLETE:
drawGameComplete();
break;
case GAME_LANDSCAPE:
drawLandscapeMode();
break;
}
gameTick();
}
/**
* Called from onDraw(), draws the in-game HUD
*/
public void drawHUD() {
mPaint.setColor(Color.BLACK);
mPaint.setTextAlign(Paint.Align.LEFT);
mCanvas.drawText(mStrings[TXT_TIME] + ": " + (mTotalTime / 1000), mTextPadding, mHudTextY,
mPaint);
mPaint.setTextAlign(Paint.Align.CENTER);
mCanvas.drawText(mStrings[TXT_LEVEL] + ": " + mlevel, mCanvasHalfWidth, mHudTextY, mPaint);
mPaint.setTextAlign(Paint.Align.RIGHT);
mCanvas.drawText(mStrings[TXT_LIVES] + ": " + mMarble.getLives(), mCanvasWidth - mTextPadding,
mHudTextY, mPaint);
// do we need to display the warning message to save the user from
// possibly dying instantly.
if (mWarning) {
mPaint.setColor(Color.BLUE);
mCanvas
.drawRect(0, mCanvasHalfHeight - 15, mCanvasWidth, mCanvasHalfHeight + 5,
mPaint);
mPaint.setColor(Color.WHITE);
mPaint.setTextAlign(Paint.Align.CENTER);
mCanvas.drawText(mStrings[TXT_TAP_SCREEN], mCanvasHalfWidth, mCanvasHalfHeight, mPaint);
}
}
/**
* Called from onDraw(), draws the game over screen.
*/
public void drawGameOver() {
mPaint.setColor(Color.BLACK);
mPaint.setTextAlign(Paint.Align.CENTER);
mCanvas.drawText(mStrings[TXT_GAME_OVER], mCanvasHalfWidth, mCanvasHalfHeight, mPaint);
mCanvas.drawText(mStrings[TXT_TOTAL_TIME] + ": " + (mTotalTime / 1000) + "s",
mCanvasHalfWidth, mCanvasHalfHeight + mPaint.getFontSpacing(), mPaint);
mCanvas.drawText(mStrings[TXT_GAME_OVER_MSG_A] + " " + (mlevel - 1) + " "
+ mStrings[TXT_GAME_OVER_MSG_B], mCanvasHalfWidth, mCanvasHalfHeight
+ (mPaint.getFontSpacing() * 2), mPaint);
mCanvas.drawText(mStrings[TXT_RESTART], mCanvasHalfWidth, mCanvasHeight
- (mPaint.getFontSpacing() * 3), mPaint);
}
/**
* Called from onDraw(), draws the game complete screen.
*/
public void drawGameComplete() {
mPaint.setColor(Color.BLACK);
mPaint.setTextAlign(Paint.Align.CENTER);
mCanvas.drawText(mStrings[GAME_COMPLETE], mCanvasHalfWidth, mCanvasHalfHeight, mPaint);
mCanvas.drawText(mStrings[TXT_TOTAL_TIME] + ": " + (mTotalTime / 1000) + "s",
mCanvasHalfWidth, mCanvasHalfHeight + mPaint.getFontSpacing(), mPaint);
mCanvas.drawText(mStrings[TXT_RESTART], mCanvasHalfWidth, mCanvasHeight
- (mPaint.getFontSpacing() * 3), mPaint);
}
/**
* Called from onDraw(), displays a message asking the user to return the
* device back to portrait mode.
*/
public void drawLandscapeMode() {
mPaint.setColor(Color.WHITE);
mPaint.setTextAlign(Paint.Align.CENTER);
mCanvas.drawRect(0, 0, mCanvasWidth, mCanvasHeight, mPaint);
mPaint.setColor(Color.BLACK);
mCanvas.drawText(mStrings[TXT_LANDSCAPE_MODE], mCanvasHalfWidth, mCanvasHalfHeight, mPaint);
}
/**
* Updates the current game state with a new state. At the moment this is
* very basic however if the game was to get more complicated the code
* required for changing game states could grow quickly.
*
* @param newState
* New game state
*/
public void switchGameState(int newState) {
mCurState = newState;
}
/**
* Register the accelerometer sensor so we can use it in-game.
*/
public void registerListener() {
mSensorManager.registerListener(mSensorAccelerometer, SensorManager.SENSOR_ACCELEROMETER,
SensorManager.SENSOR_DELAY_GAME);
}
/**
* Unregister the accelerometer sensor otherwise it will continue to operate
* and report values.
*/
public void unregisterListener() {
mSensorManager.unregisterListener(mSensorAccelerometer);
}
/**
* Clean up the custom view and exit the application.
*/
public void cleanUp() {
mMarble = null;
mMaze = null;
mStrings = null;
unregisterListener();
mActivity.finish();
}
}
4. Amazed活动类，响应Activity来控制应用程序，定义和调用Amazed视图类，同时重载Activity的onResume方法和onSaveInstanceState方法分别进行Amazed类的注册和反注册
/*
* Copyright (C) 2008 Jason Tomlinson.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.amazed;
import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
/**
* Activity responsible for controlling the application.响应Activity来控制应用程序
*/
public class AmazedActivity extends Activity {
// custom view
private AmazedView mView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// remove title bar.
requestWindowFeature(Window.FEATURE_NO_TITLE);
// setup our view, give it focus and display.
mView = new AmazedView(getApplicationContext(), this);
mView.setFocusable(true);
setContentView(mView);
}
@Override
protected void onResume() {
super.onResume();
mView.registerListener();
}
@Override
public void onSaveInstanceState(Bundle icicle) {
super.onSaveInstanceState(icicle);
mView.unregisterListener();
}
}
源码来源：https://code.google.com/p/apps-for-android/
源码下载：http://download.csdn.net/user/yangzhenping
?Amazed: A simple but addictive accelerometer-based marble-guidance game.
?AndroidGlobalTime: a full representation of the Earth that you can spin around.
?AnyCut: A utility that lets users create Home screen shortcuts to nearly anything in the system.
?Clickin2DaBeat: A game that mashes up YouTube with custom rhythm-game logic.
?DivideAndConquer: a game in which you must isolate bouncing balls by creating walls around them.
?HeightMapProfiler: A simple 3D performance testing tool that renders a 3D height map.
?LOLcat Builder:
ho hai,i see in has cheese burger? I am in our phone, caption in our photos.
?Panoramio: An app that shows you nearby photos and points of interest.
?Photostream: An app that lets you view photostreams from online photo-hosting services.
?Radar: A radar-style relative location display view, used by Panoramio(Google照片分享服务) and others.
?RingsExtended: A utility that provides enhanced control over ringtones.
?Samples: Miscellaneous examples showing features of the Android platform (among which OpenGL ES).
?SpriteMethodTest: An application that compares the speed of various 2D sprite drawing methods.
?WebViewDemo: How Java and JavaScript can call each other inside a WebView.
?WikiNotes: A wiki note pad that uses intents to navigate to wiki words and other rich content stored in the notes.
?Amazed：一个简单但令人上瘾的加速度为基础的大理石指导游戏。
?AndroidGlobalTime：地球全表示，你可以不停地旋转。
?AnyCut：一种实用工具，可以让用户创建主屏幕快捷方式到系统中几乎任何东西。
?Clickin2DaBeat：一个游戏，捣烂了YouTube的自定义节奏的游戏逻辑。
?DivideAndConquer：一个游戏中，你必须隔离他们围绕创建墙壁弹跳球。
?HeightMapProfiler：一个简单的3D性能测试工具，它呈现一个三维高程图。
?LOLcat生成器：
何海，我看到有芝士汉堡？我在我们的电话，说明在我们的照片。
?Panoramio的：一个应用程序，显示你附近的照片和兴趣点。
?照片流：一个应用程序，让您从在线照片托管服务查看照片媒体。
?雷达：雷达式的相对位置显示视图，用于Panoramio的（谷歌照片分享服务）等。
?RingsExtended：提供增强的控制铃声的实用程序。
?Samples：显示Android平台（其中的OpenGL ES）的功能，其他的例子。
?SpriteMethodTest：用于比较各种2D精灵绘制方法速度的应用程序。
?WebViewDemo：如何Java与JavaScript可以调用对方的WebView里面。
?WikiNotes：使用意图导航到维基单词和存储在票据等丰富内容维基便条。
源码来源：https://code.google.com/p/apps-for-android/
源码下载：http://download.csdn.net/user/yangzhenping
Android apps浅析01-Amazed：一个简单但令人上瘾的加速度为基础的大理石指导游戏。
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