在为PreferenceFragment
扩充布局时出现此错误,但我无法理解,因为我在布局中找不到任何列表。
这是(普通)布局:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.myPath.SettingsFragment">
</FrameLayout>
以下是引发运行时异常的代码:
public class SettingsFragment extends PreferenceFragment {
...
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_settings, container, false);
}
}
这是完整的异常堆栈:
Unable to start activity ComponentInfo{com.myPath.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:2658)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2723)
at android.app.ActivityThread.access$900(ActivityThread.java:172)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1422)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5832)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)
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:397)
at android.preference.PreferenceFragment.getListView(PreferenceFragment.java:363)
at android.preference.PreferenceFragment.bindPreferences(PreferenceFragment.java:345)
at android.preference.PreferenceFragment.onActivityCreated(PreferenceFragment.java:185)
at android.app.Fragment.performActivityCreated(Fragment.java:2122)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:927)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1082)
at android.app.BackStackRecord.run(BackStackRecord.java:833)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467)
at android.app.Activity.performStart(Activity.java:6257)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2621)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2723)
at android.app.ActivityThread.access$900(ActivityThread.java:172)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1422)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5832)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
答案 0 :(得分:0)
因为logcat显示你需要有一个id为android.R.id.list的listview才能正常工作,
顺便说一下为什么要在preferenceFragment中添加布局,我想你在这里需要Fragment。首选项片段用于显示选项列表,因此需要一个带有该ID的列表视图才能使其正常工作