Does Custom PreferenceActivity Need To Define List

Does a custom PreferenceActivity need to define a List?

If I do not define a list as part of my content associated with my custom PreferenceActivity, I get the following RuntimeException:

Your content must have a ListView whose id attribute is 'android.R.id.list'

I am trying to create a custom PreferenceActivity tha开发者_如何学Ct shows two lists:

1. One list that adds selections to the other list
2. One list that allows the user to move items up or down, or delete them (probably with a context menu)

What is a "preferred" way of doing this?

Thanks, wTs

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PreferenceActivity extends ListActivity, so I assume it needs a List.

When I don't understand things my preferred way is to Use the Source® : PreferenceActivity

Edited:

I'd take this approach:

1. Copy PreferenceActivity to a new class.

2. Create you own layout for your Activity (take a look at ListActivity docs). Add a second ListView to it.

3. Make sure that all works as original PreferenceActivity.

4. Start adding code for the second ListView.

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the problem is u probably use settings loaded from an xml file and used

setContentView(layoutId); ...

use: addPreferencesFromResource(layoutId); instead.

and you can skip the steps described by 'Peter Knego' and can directly use the Preferences without adding an listview.

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you can add preference to your PreferenceScreen use for statement to add it multiple times

public void onCreate(Bundle savedInstanceState) {

     addPreferencesFromResource(R.xml.preferences);
     PreferenceScreen preference;
     preferenceScreen = getPreferenceScreen();
     PreferenceScreen new_preference = new Preference(this);
     new_preference.setKey("unique_key");
     new_preference.setTitle("new_title");
     preferenceSreen.addPreference(new_preference);
}