1、android
安卓（Android）是一种基于Linux内核（不包含GNU组件）的自由及开放源代码的操作系统。主要使用于移动设备，如智能手机和平板电脑，由美国Google公司和开放手机联盟领导及开发。Android操作系统最初由安迪·鲁宾开发，主要支持手机。2005年8月由Google收购注资。2007年11月，Google与84家硬件制造商、软件开发商及电信营运商组建开放手机联盟共同研发改良Android系统。随后Google以Apache开源许可证的授权方式，发布了Android的源代码。
1. android
Android (Android) is a free and open source operating system based on the Linux kernel (without GNU components). Mainly used in mobile devices, such as smart phones and tablet computers, led and developed by Google and the Open Handset Alliance in the United States. The Android operating system was originally developed by Andy Rubin and mainly supports mobile phones. In August 2005, it was acquired and invested by Google. In November 2007, Google and 84 hardware manufacturers, software developers and telecom operators formed the Open Handset Alliance to jointly develop and improve the Android system. Subsequently, Google released the source code of Android under the authorization of the Apache open source license.
2、android SDK
Android SDK 指的是Android专属的软件开发工具包,其包含模拟器、教程、API文档和示例代码。
Android SDK提供了在Windows/Linux/Mac平台上开发Android应用的开发组件，Android支持所有的平台，其包含了在Android平台上开发移动应用的各种工具集。而工具集不仅包括了 Android 模拟器和用于 Eclipse 的 Android 开发工具插件（ADT），而且包括了各种用来调试、打包和在模拟器上安装应用的工具。
Android SDK 主要是以 Java 以语言为基础，用户可以使用 Java 语言来开发 Android 平台上的软件应用。通过 SDK 提供的一些工具将其打包成 Android 平台使用的 apk 文件，然后用 SDK 中的模拟器（Emulator）来模拟和测试软件在 Android 平台上的运行情况和效果。
2. android SDK
Android SDK refers to an Android-specific software development kit that includes emulators, tutorials, API documentation, and sample code.
The Android SDK provides development components for developing Android applications on Windows/Linux/Mac platforms. Android supports all platforms and includes various toolsets for developing mobile applications on the Android platform. The toolset includes not only the Android emulator and the Android Development Tools Plug-in (ADT) for Eclipse, but also various tools for debugging, packaging, and installing applications on the emulator.
The Android SDK is mainly based on the Java language, and users can use the Java language to develop software applications on the Android platform. Package it into an apk file used by the Android platform through some tools provided by the SDK, and then use the emulator in the SDK to simulate and test the running situation and effect of the software on the Android platform.
3、Genymotion
Genymotion工具提供了一套完整的Android虚拟环境，迅速成为开发人员、测试人员、推销人员甚至是游戏玩家的理想选择。
Genymotion支持Windows、Mac、Linux操作系统，他易于安装、易于运行。它通过功能强大的传感器来测试用户的应用程序，并且完美地融入整个安装环境。
3. Genymotion
Genymotion tools provide a complete set of Android virtual environments that are quickly becoming ideal for developers, testers, salespeople and even gamers.
Genymotion supports Windows, Mac, Linux operating systems, and it is easy to install and run. It tests the user's application with powerful sensors and fits perfectly into the entire installation environment.
4、SQLite
SQLite是一个开源的嵌入式关系型数据库，是一个可实现自包容，零配置，支持事务的SQL数据库引擎
4. SQLite
SQLite is an open source embedded relational database, a self-contained, zero-configuration, transaction-supported SQL database engine
5、事件监听器
事件监听器就是包含一个回调方法的view类接口，它负责监听UI上的view（视图）类控件发生的各种事件，并对事件作出相应的响应。
5. Event listener
Event listener is a view class interface that contains a callback method. It is responsible for listening to various events that occur in the view class control on the UI and responding to events accordingly.
参考资料：百度百科
翻译：Google翻译
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