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.

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();    
   }
}