Android培训翻译_与其它应用程序交互
本文是Android官方文档的翻译，采用中英文对照风格，原文参见 http://developer.android.com/intl/zh-CN/training/basics/intents/index.html
Dependencies and prerequisites
- Basic understanding of the Activity lifecycle (see Managing the Activity Lifecycle)
对Activity生命周期的基本认识(见 管理Activity生命周期)
You should also read
- Sharing Content
共享内容 - Integrating Application with Intents (blog post)
用Intent整合应用程序(博客文章) - Intents and Intent Filters
Intent和Intent过滤器
An Android app typically has several activities. Each activity displays a user interface that allows the user to perform a specific task (such as view a map or take a photo). To take the user from one activity to another, your app must use an Intent to define your app's "intent" to do something. When you pass anIntent to the system with a method such as startActivity(), the system uses the Intent to identify and start the appropriate app component. Using intents even allows your app to start an activity that is contained in a separate app.
一个Android应用程序通常有几个activity。每个activity显示一个用户接口，允许用户执行指定的任务(例如查看地图或拍照)。为了指引用户从一个activity到另一个activity，你的应用程序必须使用一个Intent来定义你的应用程序的“意图”是要做什么。当你使用一个方法，例如startActivity()，传递一个Intent到系统，系统使用Intent来标识并启动相应的应用程序组件。使用Intent甚至允许你的应用程序启动另一个独立程序中的activity。
An Intent can be explicit in order to start a specific component (a specific Activity instance) or implicit in order to start any component that can handle the intended action (such as "capture a photo").
Intent可以明确的启动一个指定的组件(一个指定的Activity实例)，或者隐式的启动任何可以处理有目的行为的组件(例如"拍照")。
This class shows you how to use an Intent to perform some basic interactions with other apps, such as start another app, receive a result from that app, and make your app able to respond to intents from other apps.
本课向你展示如何使用Intent与其它应用程序进行一些基本的交互，例如启动其它的应用程序，接收来自该应用程序的结果，使您的程序可以相应来自其它程序的Intent。
Lessons 课程
- Sending the User to Another App
将用户发送到其它程序 - Shows how you can create implicit intents to launch other apps that can perform an action.
演示如何创建隐式的Intent，启动其它的应用程序以执行一个动作。 - Getting a Result from an Activity
从Activity获取一个结果 - Shows how to start another activity and receive a result from the activity.
演示如何启动另一个活动，并接收该活动的结果。 - Allowing Other Apps to Start Your Activity
允许别的应用程序启动你的Activity - Shows how to make activities in your app open for use by other apps by defining intent filters that declare the implicit intents your app accepts.
展示如何使你的应用中的activity可以被其它应用打开并使用。 这通过定义Intent过滤器，声明你应用程序所可以接受的隐式意图来实现。
