在preferenceChange方法不叫列表preferences更改时 [英] onPreferenceChange method isn't called when Listpreferences changes

问题描述

我有一个preferences活动在我的code。
我想说明敬酒时，在列表preferences不断变化的用户单选按钮。
我用这个code，但它没有作用。 （

I have a Preferences Activity in my code. I want to show a toast when ever user change radio button in a Listpreferences. I used this code but it dose not work. :(

public class PrefsActivity extends PreferenceActivity implements OnSharedPreferenceChangeListener{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.prefs);   
}
public void onSharedPreferenceChanged(SharedPreferences arg0, String key) {

ListPreference listPreference = (ListPreference) findPreference(key);
listPreference.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {

    @Override
    public boolean onPreferenceChange(Preference preference, Object newValue) {
        // TODO Auto-generated method stub
        Toast.makeText(PrefsActivity.this, "second", Toast.LENGTH_LONG).show();
        return false;
    }
});
}
}

什么是我的问题？

what is my problem?

推荐答案

更改您的onCreate code为：

Change your onCreate code as:

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.prefs);  

SharedPreferences prefs = PreferenceManager
                .getDefaultSharedPreferences(this);
prefs.registerOnSharedPreferenceChangeListener(this);

}

您不添加registerOnShared preferenceChangeListener至prefsActivity活动

you are not adding registerOnSharedPreferenceChangeListener to PrefsActivity Activity

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