Extending the Android Application class and dealing with Singleton

我們可以使用Application 的此特性，自定義繼承於Application 的類，來保存一些靜態值。 如何自定義Application ？ public class MyApplication extends ...

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package com.devahead.extendingandroidapplication;. import android.app.Application;. public class MyApplication extends Application.

Creating a Custom Application Class. In Android, it is possible to create a custom Application class that extends the base Application class.

Instructions to Create Application Class to your Android Apps using Android Studio. Add android:name=.MyApplication to your <application> tag.

You have to create the class extending Application as you did and then you should set it on the manifest as the application name:

Application class is the object that has the full lifecycle of your application. It is your highest layer as an application.

它是代表我们的应用程序的类，使用它可以获得当前应用的主题和资源文件中的内容等，这个类更灵活的一个特性就是可以被我们继承，来添加我们自己的全局属性。