Question

I have a EditText in a preference menu that allows me to edit a URL address. The problem is when I get the preference value in the mainActivity is not getting updated right away after I click OK in the Preference Menu. Not sure how to fix this problem. I tried a bunch of ideas and finally decided to ask.

public class PreferencesActivityTest extends PreferenceActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.radio_preferences);
        PreferenceManager.setDefaultValues(PreferencesActivityTest.this,
                R.xml.radio_preferences, false);
        EditTextPreference editPref =(EditTextPreference)findPreference("MyText");
        editPref.setOnPreferenceChangeListener(
                                    new Preference.OnPreferenceChangeListener() {
            @Override
            public boolean onPreferenceChange(Preference preference,
                    Object newValue) {
                if (newValue.toString().length() > 0) {
                    return true;
                }
                // If now create a message to the user
                Toast.makeText(PreferencesActivityTest.this,
                        "Invalid Input", Toast.LENGTH_SHORT).show();
                return false;
            }
        });
    }
}

PS: This code updates the newValue to what I enter in the EditTextPreference, doesn’t carry the new value to the MainActivity until I modify it again…

UPDATE:
In OnResume() I can see that the value is updated with the one that I modified in the PreferenceActivityTest from EditTextPreference. What I’m trying to do is to pass this newValue into the SetDataSource("").

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main_radio);
    initializeMediaPlayer();
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.menu_edit:
        editURL();
        // make a Dialog or show an Activity
        return true;
    }
}

private void initializeMediaPlayer() {
    PreferenceManager.setDefaultValues(this, R.xml.radio_preferences, false);
    SharedPreferences pref =PreferenceManager.getDefaultSharedPreferences(this);
    String radioPath = pref.getString("MyText", "default value");
    // Toast.makeText(this, radioPath, Toast.LENGTH_SHORT).show();
    try {
        radioPlayer.reset();
        // radioPlayer.setDataSource("http://31.xx.xxx");
        // Toast.makeText(this, radioPath, Toast.LENGTH_SHORT).show();
        radioPlayer.setDataSource(radioPath);
    } catch {
    }
}

public void editURL() {
    stopPlaying();
    startActivity(new Intent(getBaseContext(), PreferencesActivityTest.class));
}

I am doing something fundamentally wrong but I need help. Thank you in advance !

Answer 1

how are you calling the preference activity? If you are calling it directly, you probably need to change the call to startActivityForResult so you refresh your data once you return from the Activity