在片段中获取共享首选项

Question

I was having some problem with shared preference in Android fragment. In my MainActivity onLoad, I am checking the shared preference, if it is true, then I open up fragment A.

SharedPreferences prefs = getApplicationContext().getSharedPreferences("EULA_SHARED_PREFERENCE", MODE_PRIVATE);
    boolean status = prefs.getBoolean("show_eula_key", false);
    if(status == true){
        EulaFragment eulaFragment = new EulaFragment();
        eulaFragment.show(getSupportFragmentManager(), null);
}

In my fragment A, upon Accept button onClick, I update the shared preference to false:

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
            SharedPreferences.Editor editor = prefs.edit();
            editor.putBoolean("show_eula_key", false).commit();
            dismiss();

However, even though I selected accepted and restarted the app, when I relaunch the app, it keeps open up the fragment A. Any ideas?

Thanks!

Answer 1

You use two different files:

SharedPreferences prefs = getApplicationContext().getSharedPreferences("EULA_SHARED_PREFERENCE", MODE_PRIVATE);

and

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());

You must use the same at both. (tip: an Activity is a context)

Answer 2

用这样的东西

editor.putBoolean("show_eula_key", false).apply();

Answer 3

问题是您正在从EULA_SHARED_PREFERENCE获取show_eula_key并保存默认首选项，您必须准确地保存来自首选项的数据

Answer 4

Change your second code to

SharedPreferences prefs = getContext().getSharedPreferences("EULA_SHARED_PREFERENCE", MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putBoolean("show_eula_key", false).apply();

Answer 5

In Fragment A

SharedPreferences prefs =getActivity().getSharedPreferences("EULA_SHARED_PREFERENCE", MODE_PRIVATE);
        prefs.edit().putBoolean("show_eula_key",false).apply();