更改preferenceScreen的textEdit时如何设置值微调器？

Question

如何更改首选项屏幕的TextEdit值，我希望更改MainActivity的TextEdit。我怎么能这样做？。

    @Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
        String key) {
    if (key.equals(PrefUserName)) {

        SharedPreferences sharedPref = PreferenceManager
                .getDefaultSharedPreferences(getApplication());

        String textoEditTextPreference = sharedPref.getString(key,
                "");
        // Spinner spinner = (Spinner) findViewById(R.layout.activity_main);


        //Here I want add value spinner of main activity...
        // Spinner spinner = (Spinner) findViewById(R.layout.activity_main);

        Toast.makeText(
                getApplication(),
                "New name of user: "
                        + textoEditTextPreference, Toast.LENGTH_SHORT)
                .show();
    }

Answer 1

据我所知，您的问题是： 您应该使用SharedPreference Editor

SharedPreferences.Editor prefEditor = sharedPref.edit();
prefeditor.putString(key, "");
prefeditor.commit();