android – PreferenceFragment中的RunTimeException

概述我关注 this tutorial. PreferenceActivity用于创建设置.然而有人提到我可以使用片段,如果我喜欢,所以我继续在正常活动中使用PreferenceFrament.但当我运行应用程序时,它崩溃了,给出了以下日志 – 07-25 10:41:02.048 7515-7515/com.example.sunshine E/AndroidRuntime﹕ FATAL EX 我关注 this tutorial. PreferenceActivity用于创建设置.然而有人提到我可以使用片段,如果我喜欢,所以我继续在正常活动中使用PreferenceFrament.但当我运行应用程序时,它崩溃了,给出了以下日志 –

07-25 10:41:02.048    7515-7515/com.example.sunshine E/AndroIDRuntime﹕ FATAL EXCEPTION: main    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.sunshine/com.example.sunshine.SettingsActivity}: java.lang.RuntimeException: Content has vIEw with ID attribute 'androID.R.ID.List' that is not a ListVIEw class            at androID.app.ActivityThread.performlaunchActivity(ActivityThread.java:2063)            at androID.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2088)            at androID.app.ActivityThread.access0(ActivityThread.java:134)            at androID.app.ActivityThread$H.handleMessage(ActivityThread.java:1199)            at androID.os.Handler.dispatchMessage(Handler.java:99)            at androID.os.Looper.loop(Looper.java:137)            at androID.app.ActivityThread.main(ActivityThread.java:4744)            at java.lang.reflect.Method.invokeNative(Native Method)            at java.lang.reflect.Method.invoke(Method.java:511)            at com.androID.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)            at com.androID.internal.os.ZygoteInit.main(ZygoteInit.java:553)            at dalvik.system.NativeStart.main(Native Method)     Caused by: java.lang.RuntimeException: Content has vIEw with ID attribute 'androID.R.ID.List' that is not a ListVIEw class            at androID.preference.PreferenceFragment.ensureList(PreferenceFragment.java:350)            at androID.preference.PreferenceFragment.getListVIEw(PreferenceFragment.java:336)            at androID.preference.PreferenceFragment.bindPreferences(PreferenceFragment.java:330)            at androID.preference.PreferenceFragment.onActivityCreated(PreferenceFragment.java:171)            at androID.app.FragmentManagerImpl.movetoState(FragmentManager.java:852)            at androID.app.FragmentManagerImpl.movetoState(FragmentManager.java:1039)            at androID.app.BackStackRecord.run(BackStackRecord.java:635)            at androID.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1411)            at androID.app.Activity.performStart(Activity.java:5017)            at androID.app.ActivityThread.performlaunchActivity(ActivityThread.java:2036)            at androID.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2088)            at androID.app.ActivityThread.access0(ActivityThread.java:134)            at androID.app.ActivityThread$H.handleMessage(ActivityThread.java:1199)            at androID.os.Handler.dispatchMessage(Handler.java:99)            at androID.os.Looper.loop(Looper.java:137)            at androID.app.ActivityThread.main(ActivityThread.java:4744)            at java.lang.reflect.Method.invokeNative(Native Method)            at java.lang.reflect.Method.invoke(Method.java:511)            at com.androID.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)            at com.androID.internal.os.ZygoteInit.main(ZygoteInit.java:553)            at dalvik.system.NativeStart.main(Native Method)

当我搜索SO时,我发现崩溃与ListFragment有些相关.但我确信我没有在我的应用程序中使用它. PreferenceFragment可能已经调用了它.我无法在这里查明问题.你能帮我解决一下吗？

这是我正在使用的首选xml –

<?xml version="1.0" enCoding="utf-8"?><PreferenceScreen xmlns:androID="http://schemas.androID.com/apk/res/androID"    androID:layout_wIDth="match_parent"    androID:layout_height="match_parent"    >    <EditTextPreference        androID:title="@string/pref_location_label"        androID:key="@string/pref_location_key"        androID:defaultValue="@string/pref_location_default"        androID:inputType="text"        androID:singleline="true"        /></PreferenceScreen>

这里是SettingsActivity,还有Fragment –

public class SettingsActivity extends Activity {    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_settings);        if (savedInstanceState == null) {            getFragmentManager().beginTransaction()                    .add(R.ID.container,new SettingsFragment())                    .commit();        }    }    public static class SettingsFragment extends PreferenceFragment implements Preference.OnPreferencechangelistener {        public SettingsFragment() {        }        @OverrIDe        public voID onCreate(Bundle savedInstanceState) {            super.onCreate(savedInstanceState);            // Add 'general' preferences,defined in the XML file            addPreferencesFromresource(R.xml.pref_general);            // For all preferences,attach an OnPreferencechangelistener so the UI summary can be            // updated when the preference changes.            bindPreferenceSummaryTovalue(findPreference(getString(R.string.pref_location_key)));        }        @OverrIDe        public VIEw onCreateVIEw(LayoutInflater inflater,VIEwGroup container,Bundle savedInstanceState) {            VIEw rootVIEw = inflater.inflate(R.layout.fragment_settings,container,false);            return rootVIEw;        }        /**         * Attaches a Listener so the summary is always updated with the preference value.         * Also fires the Listener once,to initialize the summary (so it shows up before the value         * is changed.)         */        private voID bindPreferenceSummaryTovalue(Preference preference) {            // Set the Listener to watch for value changes.            preference.setonPreferencechangelistener(this);            // Trigger the Listener immediately with the preference's            // current value.            onPreferenceChange(preference,PreferenceManager                            .getDefaultSharedPreferences(preference.getContext())                            .getString(preference.getKey(),""));        }        @OverrIDe        public boolean onPreferenceChange(Preference preference,Object value) {            String stringValue = value.toString();            if (preference instanceof ListPreference) {                // For List preferences,look up the correct display value in                // the preference's 'entrIEs' List (since they have separate labels/values).                ListPreference ListPreference = (ListPreference) preference;                int prefIndex = ListPreference.findindexOfValue(stringValue);                if (prefIndex >= 0) {                    preference.setSummary(ListPreference.getEntrIEs()[prefIndex]);                }            } else {                // For other preferences,set the summary to the value's simple string representation.                preference.setSummary(stringValue);            }            return true;        }    }}

还有什么我需要改变才能使它适用于Fragments而不是Activity吗？

解决方法 终于找到了.我只需要在我的片段的xml中放入一个带有androID：ID =“@ ID / androID：List”属性的ListVIEw.虽然我不知道为什么我需要它,但只是通过反复试验找到它. 总结

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