本文介绍了Android的全局变量的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我怎样才能创建全局变量仍保留在应用程序中的生命周期价值,无论哪个活动运行。
How can I create global variable keep remain values around the life cycle of the application regardless which activity running..
推荐答案
您可以扩展基 android.app.Application
类,并添加成员变量,像这样:
You can extend the base android.app.Application
class and add member variables like so:
public class MyApplication extends Application {
private String someVariable;
public String getSomeVariable() {
return someVariable;
}
public void setSomeVariable(String someVariable) {
this.someVariable = someVariable;
}
}
在你的Android清单必须声明类实现android.app.Application(添加'机器人:NAME =MyApplication的属性到现有的应用程序标记):
In your android manifest you must declare the class implementing android.app.Application (add the 'android:name="myApplication"' attribute to the existing application tag):
<application
android:name="MyApplication"
android:icon="@drawable/icon"
android:label="@string/app_name">
然后在你的活动,你可以获取和设置变量,像这样:
Then in your activities you can get and set the variable like so:
// set
((MyApplication) this.getApplication()).setSomeVariable("foo");
// get
String s = ((MyApplication) this.getApplication()).getSomeVariable();
这篇关于Android的全局变量的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!