illegalstateexception

问题 I have this line inside SubCategoryFragment : s.group_name = SubCategoryFragment.this.getResources().getString(R.string.everything_else); // line 315 in stacktrace My understanding was that by adding SubCategoryFragment.this to this would prevent the IllegalStatexception. This is a ListFragment . This occurs when someone clicks on a list item in this fragment, and goes to another; then hits the back button and returns to SubCategoryFragment . onActivityCreated() where this line above

问题 I am developing a REST-API and currently trying to fix an issue. The issue is that the REST-API is Unable to connect to pgsql database, when I go to my web page in chrome. To show this issue, I'll post a stripped down version of my stack with some explanation, describing the origin and functionality of the involved Java classes and XML. Afterwards, I'll show some code of the involved XML files and java classes. I'll look forward to your answers and feedback on my first post. UPDATE: at the

问题 I want to display a small context menu when a user right clicks a table row in my application. My plan was to use a custom made MouseListener for this that calls the show() method. Here is my code: import java.awt.Point; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.JMenuItem; import javax.swing.JPopupMenu; import javax.swing.JTable; import javax.swing.SwingUtilities; class

问题 I am trying to create an android app that involves pressing a button that takes a picture. My code is clean without any warnings or errors but when I run it on the emulator, and as soon as I press the photo button in the app, it says that your app has stopped.When I check the log file for the explanation it gives me the following Any help would be appreciated. Thank you in advance. 07-27 20:44:11.676: E/AndroidRuntime(453): FATAL EXCEPTION: main 07-27 20:44:11.676: E/AndroidRuntime(453): java

问题 Let's start with the Javadocs: IllegalStateException Signals that a method has been invoked at an illegal or inappropriate time. In other words, the Java environment or Java application is not in an appropriate state for the requested operation. IllegalArgumentException Thrown to indicate that a method has been passed an illegal or inappropriate argument. The problem with the above is that they are very black and white. Consider a use case where a method is parsing a file provided by the

问题 Here is my PreferenceActivity (Inner class of my Main Activity) 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); } Here is my onPreferenceClick : @Override public boolean onPreferenceClick(Preference preference) {

问题 I have the following code public class A{ public void createFile() { File tempXmlFile = null; String extension = ".xml"; String name = "someName"; try { tempXmlFile = File.createTempFile(name, extension); if (tempXmlFile.exists()) { tempXmlFile.delete(); } } catch (IOException e) { System.out.println(e.getStackTrace()); } } } @RunWith(PowerMockRunner.class) @PrepareForTest(A.class) public class testA extends TestCase{ private A classUnderTest; @Override @Before public void setUp() {

问题 This question already has answers here : java.lang.IllegalStateException:Could not find backup for factory javax.faces.application.ApplicationFactory (3 answers) Closed 3 years ago . I want to migrate from jsf 2.1 to 2.2 but I can not run my server (Tomcat) to couse of the following error: (I'm yours to inform you that I used [Hibernate + Spring + JSF] in project Maven) `Root WebApplicationContext: initialization started Refreshing org.springframework.web.context.support

问题 I am getting this error with following message in different scenario: Activity has been destroyed and Can not perform this action after onSaveInstanceState I am writing an app where Two Activity interacting with each Other. Activity-A launch Activity-B using Intent. This Activity-B class have two fragment children. Fragment-A use public method of activity to launch another Fragment-B . public void beginTransaction(ID id, Bundle bundle) { Fragment fragment = getFragmentItem(id); // In case

问题 I am getting this error with following message in different scenario: Activity has been destroyed and Can not perform this action after onSaveInstanceState I am writing an app where Two Activity interacting with each Other. Activity-A launch Activity-B using Intent. This Activity-B class have two fragment children. Fragment-A use public method of activity to launch another Fragment-B . public void beginTransaction(ID id, Bundle bundle) { Fragment fragment = getFragmentItem(id); // In case