android - 在一个文件中从服务器获取所有数据并在应用程序中完全重用

Question

我想在活动开始时在一项活动中获取所有数据，然后在所有其他活动中使用该数据。比如获取所有用户信息、电话中的所有联系人并将其与服务器数据进行比较等。那么有人可以帮助我吗？提前致谢。

score 1 · Accepted Answer

You can extend the Application class in android. It is a singleton class, so whatever value you set there, can be accessed from another activity.

You can access ur application instance like this in every activity

MyApplication appContext = (MyApplication)getApplicationContext();

And inside the manifest file add the attribute to the application tag

android:name=".MyApplication"

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