这是我的PreferenceActivity
(我的主要活动的内部课程)
public static class TestSettings extends PreferenceActivity implements Preference.OnPreferenceClickListener{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.pref);
getPreferenceManager().findPreference("key").setOnPreferenceClickListener(this);
}
这是我的onPreferenceClick
:
@Override
public boolean onPreferenceClick(Preference preference) {
FragmentClass fc = new FragmentClass();
fc.show(fm, "TAG");
return false;
}
这是我的FragmentClass
(TimePicker
对话框):
public class FragmentClass extends DialogFragment implements TimePickerDialog.OnTimeSetListener {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
return new TimePickerDialog(getActivity(), this, 15, 00, false);
}
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
Log.i("APP", "hour: "+hourOfDay+", min: "+minute);
}
}
问题:
当我点击偏好(在XML中定义),当我处理onClick
时(我正在显示TimePickerDialog
onClick
),我遇到以下异常:
03-21 10:06:41.325: E/AndroidRuntime(11003): FATAL EXCEPTION: main
03-21 10:06:41.325: E/AndroidRuntime(11003): java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1327)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1338)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:595)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:574)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.support.v4.app.DialogFragment.show(DialogFragment.java:127)
03-21 10:06:41.325: E/AndroidRuntime(11003): at com.example.timepicker2.MainActivity$TestSettings.onPreferenceClick(MainActivity.java:110)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.preference.Preference.performClick(Preference.java:951)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.preference.PreferenceScreen.onItemClick(PreferenceScreen.java:215)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.widget.AdapterView.performItemClick(AdapterView.java:298)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.widget.AbsListView.performItemClick(AbsListView.java:1100)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2749)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.widget.AbsListView$1.run(AbsListView.java:3423)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.os.Handler.handleCallback(Handler.java:725)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.os.Handler.dispatchMessage(Handler.java:92)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.os.Looper.loop(Looper.java:137)
03-21 10:06:41.325: E/AndroidRuntime(11003): at android.app.ActivityThread.main(ActivityThread.java:5041)
03-21 10:06:41.325: E/AndroidRuntime(11003): at java.lang.reflect.Method.invokeNative(Native Method)
03-21 10:06:41.325: E/AndroidRuntime(11003): at java.lang.reflect.Method.invoke(Method.java:511)
03-21 10:06:41.325: E/AndroidRuntime(11003): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-21 10:06:41.325: E/AndroidRuntime(11003): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-21 10:06:41.325: E/AndroidRuntime(11003): at dalvik.system.NativeStart.main(Native Method)
代码错误指向show()
方法中的方法onPreferenceClick
。
为什么会发生这种情况,我该如何解决这个问题?
编辑:
Prefs.xml文件
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
<CheckBoxPreference android:title="Checkbox" android:summary="Checkbox"/>
<EditTextPreference android:summary="time" android:dialogTitle="Hello" />
<Preference android:title="Prefff" android:key="key"/>
</PreferenceScreen>
我尝试了什么:
我已经尝试过大多数投票的解决方案,我在这里找到getting exception "IllegalStateException: Can not perform this action after onSaveInstanceState"
@Override
protected void onSaveInstanceState(Bundle outState) {
//No call for super(). Bug on API Level > 11.
}
但它仍然没有用。甚至不是API&lt; 11.我仍然被提到异常。
答案 0 :(得分:1)
在这里走出一条路:
// this is in your TestSettings class
public boolean onPreferenceClick(Preference preference) {
FragmentClass fc = new FragmentClass();
// getFragmentManager() here ensures you are using the FragmentManager
// associated with TestSettings activity and not your MainActivity
fc.show(getFragmentManager(), "TAG");
return false;
}
键是 getFragmentManager()
确保您使用与TestSettings活动相关联的FragmentManager
。我觉得你正在使用MainActivity中的FragmentManager
实例(看作TestSettings是MainActivity的内部类,这不是猜测的疯狂......也许)。