如何显示警报只在我的应用程序的第一个运行对话框？ [英] How do I show an alert dialog only on the first run of my application?

问题描述

我有我想要启动应用程序在第一次之后，显示仅在第一次警报。

I have an alert that I want to display only the first time right after starting the application for the first time.

我怎么能这样做？

推荐答案

有几个方法可以做到这一点，但也许最简单的是只是为了检查一个标志在共享preferences对象并设定它一旦警报被示出。

There are a few ways to do this, but perhaps the easiest is just to check a flag in a SharedPreferences object and set it once the alert is shown.

<一个href="http://developer.android.com/guide/topics/data/data-storage.html#$p$pf">Shared$p$pferences

类似于

public class MyActivity extends Activity {

public static final String PREFS_NAME = "MyPrefsFile";

@Override
protected void onCreate(Bundle state){

   super.onCreate(state);
   SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
   boolean dialogShown = settings.getBoolean("dialogShown", false);

   if (!dialogShown) {
     // AlertDialog code here

     SharedPreferences.Editor editor = settings.edit();
     editor.putBoolean("dialogShown", true);
     editor.commit();    
   }
}

这篇关于如何显示警报只在我的应用程序的第一个运行对话框？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IT屋！