活动，AppCompatActivity，FragmentActivity和ActionBarActivity：什么时候使用？ [英] Activity, AppCompatActivity, FragmentActivity, and ActionBarActivity: When to Use Which?
问题描述
我是从未来的iOS它很容易与您只需使用一个UIViewController。然而，在Android的东西似乎要复杂得多，与特定的API级别一定的UIComponents。我读BigNerdRanch为Android（书大概为2岁），他们建议我使用活动主办我的 FragmentActivities 。不过，我以为活动是德precated。
I'm coming from iOS where it's easy and you simply use a UIViewController. However, in Android things seem much more complicated, with certain UIComponents for specific API Levels. I'm reading BigNerdRanch for Android (the book is roughly 2 years old) and they suggest I use Activity to host my FragmentActivities. However, I thought Activity was deprecated.
因此，对于API等级22（与API级别15或16的最低支持），正是我应该使用这两种主办的组件以及组件本身？对于所有这些有使用，或者我应该使用一个或两个几乎完全？
So for API Level 22 (with a minimum support for API Level 15 or 16), what exactly should I use both to host the components, and for the components themselves? Are there uses for all of these, or should I be using one or two almost exclusively?
感谢您。
推荐答案
有关的15最低API级别，您想使用AppCompatActivity。因此，例如，您MainActivity应该是这样的：
For a minimum API level of 15, you'd want to use AppCompatActivity. So for example, your MainActivity would look like this:
public class MainActivity extends AppCompatActivity {
....
....
}
要使用AppCompatActivity，请确保您有谷歌支持库下载的（你可以在你的工具检查这 - > Android的 - > SDK管理器）。然后，只需在您的应用程序的gradle.build文件依赖的gradle：
To use the AppCompatActivity, make sure you have the Google Support Library downloaded (you can check this in your Tools -> Android -> SDK manager). Then just include the gradle dependency in your app's gradle.build file:
compile 'com.android.support:appcompat-v7:22:2.0'
您可以使用此应用程序兼容性作为您的主要活动，然后可以用于启动片段或其他活动（这取决于你正在构建什么样的应用程序）。
You can use this AppCompat as your main Activity, which can then be used to launch Fragments or other Activities (this depends on what kind of app you're building).
该BigNerdRanch本书是一个很好的资源，但是，是的，这是过时的。读它在Android上如何工作的一般信息，但不要指望他们使用是最新的具体类。
The BigNerdRanch book is a good resource, but yeah, it's outdated. Read it for general information on how Android works, but don't expect the specific classes they use to be up to date.
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