我试图调用应用getSharedPreferences
...如何在应用程序中获得共享首选项?
public class App extends Application{
public App() {
SharedPreferences prefs = getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
}
}
...但我得到了NullPointerException
:
java.lang.NullPointerException: Attempt to invoke virtual method
'android.content.SharedPreferences
android.content.Context.getSharedPreferences(java.lang.String, int)'
on a null object reference
我也尝试这样做,得到了同样的异常:
Context con = getApplicationContext();
我该如何拨打getSharedPreferences
?
http://stackoverflow.com/a/10818234/3395198 –