有几种方法可以做到这一点，但最简单的方法可能只是检查SharedPreferences对象中的标志，并在显示警报后对其进行设置。
共享首选项
就像是
public class MyActivity extends Activity {public static final String PREFS_NAME = "MyPrefsFile";@Overrideprotected void onCreate(Bundle state){ super.onCreate(state); SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0); boolean dialogShown = settings.getBoolean("dialogShown", false); if (!dialogShown) { // alertDialog pre here SharedPreferences.Editor editor = settings.edit(); editor.putBoolean("dialogShown", true); editor.commit(); }}
