複選框PreferenceScreen

Question

我做這個XML代碼preferenceScreen：

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" android:orderingFromXml="true"> 
<PreferenceCategory 
     android:key="pref1" 
     android:title="Search All"> 
    <CheckBoxPreference 
      android:key="check_all" 
      android:title="Check"/> 
</PreferenceCategory> 
<PreferenceCategory 
     android:title="Specific Search" 
     android:key="pref2"> 
    <ListPreference 
      android:title="Food" 
      android:key="opcion1" 
      android:dialogTitle="Escoge Categoria" 
      android:entryValues="@array/codigoCateg" 
      android:entries="@array/categorias" 
      android:negativeButtonText="Cancel"/> 
    <ListPreference android:title="Dificultad"/> 
    <ListPreference android:title="Otras"/> 
</PreferenceCategory> 

Java代碼：

public class OpcionesBusqueda extends PreferenceActivity { 

boolean CheckBoxPreference; 
private PreferenceCategory Pref2; 


/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    addPreferencesFromResource(R.xml.video_search); 

    Pref2=(PreferenceCategory)findPreference("pref2"); 

    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getBaseContext()); 

    CheckBoxPreference = prefs.getBoolean("check_all", true); 

    if(CheckBoxPreference==true){ 
     Pref2.setEnabled(false); 
    } 
    else{ 
     Pref2.setEnabled(true); 
    } 
} 

}

我想要做的是，如果複選框被選中，然後pref2（preferencecategory2）應該被禁用，如果它未被選中，它應該被啓用。有什麼我做錯了，或者可能不止一個。

謝謝。

---

我跟Alex的答案，並具有一些改變我到達的慾望代碼，這裏是糾正代碼：}

public class OpcionesBusqueda extends PreferenceActivity { 

private CheckBoxPreference Check; 
private PreferenceCategory Pref2; 

/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    addPreferencesFromResource(R.xml.video_search); 

    Check=(CheckBoxPreference)findPreference("check_all"); 
    Pref2=(PreferenceCategory)findPreference("pref2"); 

    Check.setOnPreferenceChangeListener(new CheckBoxPreference.OnPreferenceChangeListener() { 
     public boolean onPreferenceChange(final Preference preference, final Object newValue) { 
       Pref2.setEnabled((Boolean)newValue == false); 
       return true; 
     } 
    });   

Answer 1

您可能要設置OnPreferenceChangeListener爲check_all偏好並在onPreferenceChaged之內更改pref2OnPreferenceChangeListener

CheckBoxPreference.setOnPreferenceChangeListener(new OnPreferenceChangeListener() { 
    boolean onPreferenceChange(Preference preference, Object newValue) { 
      Pref2.setEnabled((Boolean)newValue == false); 
    } 
}