從菜單中啓動preferenceActivity

Question

我創建了一個名爲Menu的類。在用戶按下菜單按鈕時，會顯示3個選項，即。關於偏好和退出。當他們點擊偏好時，偏好活力應該被打開。但是，該應用程序崩潰，無法打開偏好設置。我發佈了ListActivity，這是我試圖在清單和日誌文件中打開的活動的活動標籤。請幫忙。

public class Menu extends ListActivity { 
    String[] list = { "StartView", "FunWithText", "Email", "Camera", 
      "ActivityStarter" }; 

    @Override 
    protected void onListItemClick(ListView l, View v, int position, long id) { 
     super.onListItemClick(l, v, position, id); 
     try { 
      Class myClass = Class.forName("com.thenewboston.terry." 
        + list[position]); 
      Intent myIntent = new Intent(Menu.this, myClass); 
      startActivity(myIntent); 

     } catch (ClassNotFoundException e) { 
      e.printStackTrace(); 
     } 

    } 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setListAdapter(new ArrayAdapter<String>(Menu.this, 
       android.R.layout.simple_list_item_1, list)); 

    } 

    @Override 
    public boolean onCreateOptionsMenu(android.view.Menu menu) { 

     super.onCreateOptionsMenu(menu); 
     MenuInflater balloon = getMenuInflater(); 
     balloon.inflate(R.menu.menu, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     switch (item.getItemId()) { 
     case (R.id.about): 
      Intent myIntent = new Intent(Menu.this, Dialogue.class); 
      startActivity(myIntent); 
      break; 
     case (R.id.preferences): 
      Intent prefs = new Intent(Menu.this, Preferences.class); 
      startActivity(prefs); 
      break; 
     case (R.id.exit): 
      finish(); 
      break; 

     } 
     return false; 
    } 

} 

---

的Manifest.xml：

<activity 
     android:name=".Preferences" 
     android:label="Start Activity" 
     android:theme="@android:style/Theme.Dialog" > 



     <intent-filter> 
      <action android:name="com.thenewboston.terry.PREFS" /> 

      <category android:name="android.intent.category.DEFAULT" /> 
     </intent-filter> 
    </activity> 

---

錯誤日誌：

07-18 00:39:07.133: E/AndroidRuntime(738): FATAL EXCEPTION: main 
07-18 00:39:07.133: E/AndroidRuntime(738): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.thenewboston.terry/com.thenewboston.terry.Preferences}: android.view.InflateException: Binary XML file line #14: Error inflating class listPreference 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.os.Handler.dispatchMessage(Handler.java:99) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.os.Looper.loop(Looper.java:123) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.app.ActivityThread.main(ActivityThread.java:4627) 
07-18 00:39:07.133: E/AndroidRuntime(738): at java.lang.reflect.Method.invokeNative(Native Method) 
07-18 00:39:07.133: E/AndroidRuntime(738): at java.lang.reflect.Method.invoke(Method.java:521) 
07-18 00:39:07.133: E/AndroidRuntime(738): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
07-18 00:39:07.133: E/AndroidRuntime(738): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
07-18 00:39:07.133: E/AndroidRuntime(738): at dalvik.system.NativeStart.main(Native Method) 
07-18 00:39:07.133: E/AndroidRuntime(738): Caused by: android.view.InflateException: Binary XML file line #14: Error inflating class listPreference 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:441) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.preference.GenericInflater.rInflate(GenericInflater.java:481) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.preference.GenericInflater.inflate(GenericInflater.java:326) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.preference.GenericInflater.inflate(GenericInflater.java:263) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:251) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.preference.PreferenceActivity.addPreferencesFromResource(PreferenceActivity.java:262) 
07-18 00:39:07.133: E/AndroidRuntime(738): at com.thenewboston.terry.Preferences.onCreate(Preferences.java:12) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
07-18 00:39:07.133: E/AndroidRuntime(738): ... 11 more 
07-18 00:39:07.133: E/AndroidRuntime(738): Caused by: java.lang.ClassNotFoundException: android.preference.listPreference in loader dalvik.system.PathClassLoader[/data/app/com.thenewboston.terry-1.apk] 
07-18 00:39:07.133: E/AndroidRuntime(738): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243) 
07-18 00:39:07.133: E/AndroidRuntime(738): at java.lang.ClassLoader.loadClass(ClassLoader.java:573) 
07-18 00:39:07.133: E/AndroidRuntime(738): at java.lang.ClassLoader.loadClass(ClassLoader.java:532) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.preference.GenericInflater.createItem(GenericInflater.java:375) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.preference.GenericInflater.onCreateItem(GenericInflater.java:417) 
07-18 00:39:07.133: E/AndroidRuntime(738): at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:428) 
07-18 00:39:07.133: E/AndroidRuntime(738): ... 19 more 

**Preferences xml:** 

<?xml version="1.0" encoding="utf-8"?> 
<PreferenceScreen 
    xmlns:android="http://schemas.android.com/apk/res/android"> 
    <PreferenceCategory android:title="Label">  
    <EditTextPreference 
    android:title="EditText" 
    android:key="name" 
    android:summary="Enter your name"/> 

    <CheckBoxPreference 
    android:title="checkBox" 
    android:key="music" 
    android:defaultValue="true" 
    android:summary="music on?" 
    /> 
    <listPreference 
    android:title="list" 
    android:key="list" 
    android:summary="Choose somethign" 
    android:entries="@array/list" 
    android:entryValues="@array/values" 
    /> 
    </PreferenceCategory> 
</PreferenceScreen> 

public class Preferences extends PreferenceActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 

     super.onCreate(savedInstanceState); 
     addPreferencesFromResource(R.xml.prefs); 
    } 

} 

Answer 1

事實證明，應用於PreferenceActivity主題是不能用PreferenceActivity對象兼容。感謝所有嘗試提供幫助的人。

Answer 2

我認爲你的preferences.xml需要看起來像這樣：

<?xml version="1.0" encoding="utf-8"?> 
<PreferenceScreen 
    xmlns:android="http://schemas.android.com/apk/res/android"> 
    <PreferenceCategory android:title="Label">  
    <EditTextPreference 
    android:title="EditText" 
    android:key="name" 
    android:summary="Enter your name"/> 

    <CheckBoxPreference 
    android:title="checkBox" 
    android:key="music" 
    android:defaultValue="true" 
    android:summary="music on?" 
    /> 
    <ListPreference 
    android:title="list" 
    android:key="list" 
    android:summary="Choose somethign" 
    android:entries="@array/list" 
    android:entryValues="@array/values" 
    /> 
    </PreferenceCategory> 
</PreferenceScreen>