入门Android游戏开发：超级跳跃者

需积分: 10 104 浏览量更新于2024-07-26 收藏 45.17MB PDF 举报

"《 Beginning.Android.Games 》是入门Android游戏开发的一本书，由Mario Zechner撰写，旨在帮助读者实现他们的游戏开发想法。书中通过14个章节系统地介绍了Android游戏开发的各个方面，从基础到高级，包括2D和3D游戏的开发技术，以及游戏发布等实际步骤。" 在第9章"SuperJumper: A 2D OpenGLES Game"中，作者将引导读者进入2D游戏开发的世界，使用OpenGLES这一强大的图形库。OpenGLES（OpenGL for Embedded Systems）是针对嵌入式设备，如智能手机和平板电脑的图形处理API，它允许开发者创建高性能的2D和3D图形。本章可能涵盖以下知识点： 1. **2D游戏设计基础**：理解2D游戏的基本架构，包括游戏场景、角色、碰撞检测和游戏逻辑等。 2. **OpenGLES介绍**：学习OpenGLES的基本概念，如顶点坐标、纹理映射、颜色混合以及渲染管线。 3. **Shader语言GLSL**：OpenGLES中使用GLSL（OpenGL Shading Language）编写着色器，用于处理图形的光照、颜色和纹理效果。 4. **纹理和精灵（Sprites）管理**：如何加载和使用图像资源，创建精灵表（Sprite Sheets）以优化性能。 5. **帧率控制与动画**：掌握如何实现平滑的游戏动画，包括帧率控制和时间步进。 6. **游戏循环（Game Loop）**：理解并实现游戏循环，它是游戏运行的核心，负责处理输入、更新游戏状态和渲染画面。 7. **碰撞检测**：学习如何检测游戏对象间的碰撞，以便实现交互和响应。 8. **用户输入处理**：处理触摸屏事件，使游戏对玩家输入做出反应。 9. **性能优化**：探讨如何优化2D游戏的性能，包括减少绘制调用、批处理渲染和内存管理。 10. **游戏测试与调试**：介绍在Android平台上测试游戏的方法，以及如何使用调试工具解决问题。此外，书中的其他章节还会涉及Android游戏开发框架的选择、Android SDK的初步使用、游戏编程基础、3D游戏开发、3D编程技巧，以及游戏的发布流程等。这些内容旨在提供一个全面的Android游戏开发学习路径，让初学者能够逐步掌握游戏开发的核心技能。

CHAPTER 1: Android, the New Kid on the Block

As game developers, we will create UI applications within this framework. As such, we

will be interested in an application’s architecture and life cycle as well as its interactions

with the user. Background services usually play a small role in game development,

which is why I will not go into details about them.

The Software Development Kit

To develop applications for Android, we will use the Android software development kit

(SDK). The SDK is composed of a comprehensive set of tools, documentation, tutorials,

and samples that will help you get started in no time. Also included are the Java libraries

needed to create applications for Android. These contain the APIs of the application

framework. All major desktop operating systems are supported as development

environments.

Prominent features of the SDK are as follows:

 The debugger, capable of debugging applications running on a device

or in the emulator

 A memory and performance profile to help you find memory leaks and

identify slow code

 The device emulator, based on QEMU (an open source virtual machine

to simulate different hardware platforms), which, although accurate,

can be a bit slow at times

 Command-line utilities to communicate with devices

 Build scripts and tools to package and deploy applications

The SDK can be integrated with Eclipse, a popular and feature-rich open source Java

integrated development environment (IDE). The integration is achieved through the

Android Development Tools (ADT) plug-in, which adds a set of new capabilities to

Eclipse to create Android projects; to execute, profile and debug applications in the

emulator or on a device; and to package Android applications for their deployment to

the Android Market. Note that the SDK can also be integrated into other IDEs such as

NetBeans. There is, however, no official support for this.

NOTE: Chapter 2 covers how to set up the development environment with the SDK and Eclipse.

The SDK and the ADT plug-in for Eclipse receive constant updates that add new

features and capabilities. It’s therefore a good idea to keep them updated.

Alongside any good SDK comes extensive documentation. Android’s SDK does not fall

short in this area and comes with a lot of sample applications. You can also find a

developer guide and a full API reference for all the modules of the application framework

at http://developer.android.com/guide/index.html.

CHAPTER 1: Android, the New Kid on the Block

wagon and offer a wide range of devices running Android. Besides handsets, there’s

also a slew of tablet devices coming to the market that build upon Android. Some key

concepts are shared by all devices, though, which makes our lives as game developers

a little easier.

Hardware

There are no hard minimum requirements for an Android device. However, Google has

recommended the following hardware specifications, which virtually all available Android

devices fulfill and most often surpass significantly:

ARM-based CPU: At the time of writing this book, this requirement was

relaxed. Android now also runs on the x86 architecture. The latest ARM-

based devices are also starting to feature dual-core CPUs.

128MB RAM: This specification is a minimum. Current high-end devices

already include 512MB RAM, and 1GB RAM devices are expected in the

very near future.

256MB flash memory: This minimum amount of memory is for storing

the system image and applications. For a long time, this lack of memory

was the biggest gripe among Android users because third-party

applications could be installed only to flash memory. This changed with

the release of Froyo.

Mini or Micro SD card storage: Most devices come with a few gigabytes

of SD card storage, which can be replaced with bigger SD cards by the

user.

16-bit color Half-Size Video Graphics Array (HVGA) TFT LCD with touch

screen: Before Android version 1.6, only HVGA screens (480320 pixels)

were supported by the operating system. Since version 1.6, lower- and

higher-resolution screens are supported. The current high-end devices

have Wide Video Graphis Array (WVGA) screens (800480, 848480, or

852480 pixels), and some low-end devices sport Quarter-Size Video

Graphics Array (QVGA) (320280 pixels) screens. Touch screens are

almost always capacitive and are only single-touch capable on most

older devices.

Dedicated hardware keys: These keys are used for navigation. Most

phones to date have at least a menu, search, home, and a back key.

Some manufacturers have started to deviate from this and are including

a subset of these keys or no keys at all.

Of course, there’s a lot more hardware in actual Android devices. Almost all handsets

have GPS, an accelerometer, and a compass. Many also feature proximity and light

sensors. These peripherals offer game developers new ways to let the user interact –

with the game, and we’ll have a look at some of them later on. A few devices have a full

QWERTY keyboard as well as a trackball. The latter is most often found in HTC devices.

CHAPTER 1: Android, the New Kid on the Block

Cameras are also available on almost all current devices. Some handsets and tablets

have two cameras, one on the back and one on the front for video chat.

Especially crucial for game development are dedicated graphics processor units (GPUs).

The earliest handset to run Android already had an OpenGL ES 1.0compliant GPU.

More-modern devices have GPUs comparable in performance to the Xbox or

PlayStation 2 and support OpenGL ES 2.0. If no graphics processor is available, a

fallback in the form of a software renderer called PixelFlinger is provided by the platform.

Many low-budget handsets rely on the software renderer, which is often sufficiently fast

for low-resolution screens.

Along with the graphics processor, any currently available Android device also has

dedicated audio hardware. Many hardware platforms also have special circuitry to

decode different media formats such as H.264 in hardware. Connectivity is provided via

hardware components for mobile telephony, Wi-Fi, and Bluetooth. All these hardware

modules of an Android device are most often integrated in a single system on a chip

(SoC), a system design also found in embedded hardware.

First Gen, Second Gen, Next Gen

Given the differences in capabilities, especially in terms of performance, Android

developers usually group devices into first-, second-, and next-generation devices. This

terminology comes up a lot, even more so when it comes to game development for

Android. Let’s try to define these terms.

Each generation has a specific set of characteristics, mostly a combination of the

Android version(s) used, the CPU/GPU, and the screen resolution of the devices within a

generation. Although the hardware specifications are static, this might not be the case

for the Android version used on a device.

In the Beginning: First Generation

First-generation devices are the current baseline and are best described by examining

one of their most prominent specimens, the HTC Hero, shown in Figure 1–3.

剩余678页未读，继续阅读

topgung

粉丝: 0
资源: 1

入门Android游戏开发：超级跳跃者

Apress.Beginning.Android.Games

Apress.Beginning.Android.Tablet.Games.Programming

Beginning.Android.4.Games.Development.Dec.2011

android 毕设 参考文献 英语

for {set ii 1} {$ii<=25} {incr ii} { puts "The $ii th Time history analysis is Beginning..............." if {[file exists outputBWPZ[expr $ii]]==0} { file mkdir outputBWPZ[expr $ii];请帮我解释并优化这段代码

javaandroid开发教程

移动应用和游戏的开发的参考文献

js video seek to 0

最新资源

android 毕设参考文献英语