由网友(泪的方程式)分享简介：任何人都可以请让我清醒有关共享preferences的Andr​​oid系统。我如何可以设置显示警报消息只有一次，当活动被初始加载的应用程序的条件？Can anybody please clear me about the SharedPreferences in Android.How can I set a...

任何人都可以请让我清醒有关共享preferences的Andr​​oid系统。 我如何可以设置显示警报消息只有一次，当活动被初始加载的应用程序的条件？

Can anybody please clear me about the SharedPreferences in Android. How can I set a condition of displaying a "Alert Message" only once when the Activity gets loaded initially in the Application?

它是如何通过使用共享preferences做？

How it is done by using SharedPreferences?

Thsnks， 约翰·

Thsnks, John

推荐答案

这是完全巧合，我发誓，我的博客上讲述这个：）

It's completely by coincidence, I swear, that I blogged about this today :)

SharedPreferences settings = this.getSharedPreferences("MyApp",0);
boolean firstrun=settings.getBoolean("firstrun",true);
if (firstrun) {
  SharedPreferences.Editor e = settings.edit();
  e.putBoolean("firstrun",false);
  e.commit();
  // Do something here that you only want to happen the first time
}