的onResume（）方法和ListPreferences的Android

Question

PreferenceActivity：

public class UsersettingsActivity extends PreferenceActivity 
{ 

    public EditTextPreference nomePreferences; 
    public static float currValue; 
    public static ListPreference lista; 
    public static CharSequence currText; 
    public static String ilmionome; 
    public CheckBoxPreference checkboxPrefSpeech; 
    public CheckBoxPreference checkboxPref; 
    @SuppressWarnings("deprecation") 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     addPreferencesFromResource(R.xml.preferences); 
     this.overridePendingTransition(R.anim.in, R.anim.out); 
     /** Customizzo la actionbar */ 
     ActionBar actionBar = getActionBar(); 
     actionBar.setCustomView(R.layout.actionbarcustom); 
     actionBar.setDisplayShowTitleEnabled(false); 
     actionBar.setDisplayShowCustomEnabled(true); 
     actionBar.setDisplayShowCustomEnabled(true); 
    nomePreferences = (EditTextPreference)getPreferenceManager().findPreference("nomepreferenze"); 

    lista = (ListPreference)getPreferenceManager().findPreference("prefSyncFrequency"); 

    currText = lista.getEntry(); 
    currValue = Float.parseFloat(lista.getValue()); 
    Toast valori = Toast.makeText(getBaseContext(), currText, Toast.LENGTH_SHORT); 
    valori.show(); 

    if(currValue == 2){ 
     currValue = MainActivity.tts.setSpeechRate(2.0f); 
    } else if (currValue == 1) { 
     currValue = MainActivity.tts.setSpeechRate(1.0f); 
    } else if (currValue == 0.5) { 
     currValue = MainActivity.tts.setSpeechRate(0.5f); 
    } 


} 

}
的arrays.xml

<?xml version="1.0" encoding="utf-8"?> 
<resources> 
    <string-array name="syncFrequency"> 
     <item name="2">Double/item> 
     <item name="1">Normal</item> 
     <item name="0">half</item> 

    </string-array> 
    <string-array name="syncFrequencyValues"> 
     <item name="2">2</item> 
     <item name="1">1</item> 
     <item name="0">0.5</item> 
    </string-array> 

</resources> 

好吧，如果我選擇 「雙師型」 例如，我從這個活動退出回到我的MainActivity，語速仍然一樣！我需要退出應用程序，然後它的作品！所以這意味着在MainActivity的onResume（）需要一些調用PreferenceActivity的值。現在瞭解了嗎？

編輯：

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" > 
    <PreferenceCategory 
      android:summary="Opzioni lettura sms" 
      android:fontFamily="sans-serif-light" 
      android:title="Opzioni"> 

      <CheckBoxPreference 
       android:key="firstDependent" 
       android:fontFamily="sans-serif-light" 
       android:summary="@string/autorizza" 
       android:title="@string/letturanotifiche" 

      /> 


     <EditTextPreference 
      android:title="@string/nomepreferences" 
      android:key="nomepreferenze" 
      android:fontFamily="sans-serif-light" 
      android:summary="@string/nomepreferencesdesc" 
      android:inputType="text" 
      android:dialogTitle="@string/nameis" 
      /> 

     <ListPreference 
      android:key="prefSyncFrequency" 
      android:entries="@array/syncFrequency" 
      android:summary="@string/pref_sync_frequency_summary" 
      android:entryValues="@array/syncFrequencyValues" 
      android:title="@string/pref_sync_frequency" /> 


    </PreferenceCategory> 
<!--Any other categories include here--> 
</PreferenceScreen> 

Answer 1

public class SomePreference extends PreferenceActivity implements OnSharedPreferenceChangeListener{ 

protected void onCreate(Bundle savedInstanceState){ 
    super.onCreate(savedInstanceState); 
    addPreferencesFromResource(R.xml.task_pref); 


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


    // Register OnChangeListener 
    SP.registerOnSharedPreferenceChangeListener(this); 
} 

@Override 
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, 
     String key) { 
    // TODO Auto-generated method stub 
    //Make sure the item changed was the list_preference 
    if(key.equals("")){ 
     String value = sharedPreferences.getString(key, "Double"); 

     Intent i = new Intent(this, Main.class); 
     startActivity(i); 
    } 
} 

}

主要活動

public class Main extends Activity{ 

protected void onCreate(Bundle savedInstanceState){ 
    \\setup rest here. 

SharedPreferences share_someting = PreferenceManager.getDefaultSharedPreferences(this); 
String ss = share_something.getString("prefSyncFrequency", "Double"); 
} 

protected void onResume(){ 
\\setup rest here. 
SharedPreference share_something = PreferenceManager.getDefaultSharedPrefernce(this); 
String ss = share_something("prefSyncFrequency", "Double"); 
} 

Answer 2

protected void onCreate(){ 
    text_speech(); 

} 
protected void onResume(){ 
    text_speech(); 

} 

public void text_speech(){ 


SharedPrefernces spp = PreferenceManager.getDefaultSharedPreferences(this); 

String sf = spp.getString("prefSyncFrequency", "Double"); 
if(sf.equals("two")){ 
    currValue = MainActivity.tts.setSpeechRate(2.0f); 

}else if(sf.equals("single")){ 
    currValue = MainActivity.tts.setSpeechRate(1.0f); 
}else (sf.equals("half")){ 
    currValue = MainActivity.tts.setSpeechRate(0.5f); 
} 

我只是改變了下面follwing，我覺得它更容易以這種方式工作。

<string-array name="syncFrequencyValues"> 
    <item >two</item> 
    <item >single</item> 
    <item >half</item> 
</string-array>