Can't read SharedPreferences

Question

I'm storing some values in my PreferencesFragment in this way:

// SharedPreferences prefs = getActivity().getSharedPreferences("Test", 0);
SharedPreferences prefs = getPreferenceScreen().getSharedPreferences();

SharedPreferences.Editor edit = prefs.edit();

edit.putInt(getString(R.string.valOneKey), 100);
edit.putInt(getString(R.string.valTwoKey), 200);
edit.commit();

Then, I want to read the preferences in a non activity class:

// SharedPreferences prefs = ActivityHandler.getCurrentActivity().getSharedPreferences("Test", 0);
SharedPreferences prefs = ActivityHandler.getCurrentActivity().getPreferences(0);

int valOne = prefs.getInt(ActivityHandler.getCurrentActivity().getString(R.string.valOneKey), 0);
int valTwo = prefs.getInt(ActivityHandler.getCurrentActivity().getString(R.string.valTwoKey), 0);

I've tried also the uncommented code, but I get always 0 for both values.

Answer 1

你做错了。每次获得不同的共享偏好时。使用此代码：

用于存储价值：

SharedPreferences prefs = getActivity().getSharedPreferences("Test", 0);
SharedPreferences.Editor edit = prefs.edit();

edit.putInt(getString(R.string.valOneKey), 100);
edit.putInt(getString(R.string.valTwoKey), 200);
edit.commit();

获取值：

SharedPreferences prefs = getActivity().getSharedPreferences("Test", 0);
int valOne = prefs.getInt(ActivityHandler.getCurrentActivity().getString(R.string.valOneKey), 0);
int valTwo = prefs.getInt(ActivityHandler.getCurrentActivity().getString(R.string.valTwoKey), 0);

希望这会对你有所帮助。

Answer 2

试试这个

使用SharedPreferences存储

SharedPreferences sharedPref = getSharedPreferences("my_pref", Context.MODE_MULTI_PROCESS);

Editor editor = sharedPref.edit();
editor.putInt("KEY", VAL);
..
..
editor.commit();

从SharedPreferences检索

SharedPreferences sharedPref = getSharedPreferences(
                "my_pref", Context.MODE_MULTI_PROCESS);
int size = sharedPref.getInt("KEY", default_VAL);

这将有所帮助......谢谢