如何共享活动/服务之间的资源 [英] How to share resources between activities/services
问题描述
我想知道是什么在我的Android应用程序共享单身的最佳方法。
我有一个不依赖于对方的一些活动，但我希望他们有一个单身，他们都可以读/写。
I wanted to know what is the best approach for sharing singleton in my android app. I have a few activities that does not rely on each other, but I want them to have a singleton that they can all read/write.
放在哪里呢？
感谢
推荐答案
您的应用程序应该是一个单例。它避免了与共享DATAS或模式等诸多问题。
Your application should be a singleton. It avoids many other problem related to sharing datas or models.
在您的manifest.xml：
In your manifest.xml :
<application android:icon="@drawable/icon"
android:label="@string/app_name" android:debuggable="false"
android:name="<class of your application see below>"
android:launchMode="singleTop">
..... all activities/services/receivers/etc... as usual
</application>
和Android：名称指的是这个类：
And your android:name refers to this class :
public class MyApp extends Application {
//singleton, but use onCreate more than constructor to build shared resources.
....
}//class
，然后从任何活动中，你可以检索你的单做这个以获得共享资源：
And then, from within any activity, you can retrieve your singleton to get shared resources by doing this :
((MyApp)getApplicationContext()).getSharedResources()....
或
MyApp.getInstance().getSharedResources()....
有一个单一个应用程序在Android上通常的设计模式，它是非常有用的处理设备旋转（因为它往往会破坏活动并重新创建它们），因为它提供了一个稳定的实体应用程序生命周期内持续。
Having a singleton as a app is a usual design pattern in android, it is especially useful to handle device rotation (as it tends to destroy activities and recreate them) as it provides a stable entity to persist during app lifecycle.
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