illegalstateexception

问题 Having these dependencies: dependencies { implementation "androidx.work:work-runtime:2.0.1" androidTestImplementation "androidx.work:work-testing:2.0.1" } When running this code for the second time: Configuration config = new Configuration.Builder().build(); WorkManager.initialize(getApplicationContext(), config); this.workManager = WorkManager.getInstance(); I get this error message: java.lang.IllegalStateException: WorkManager is already initialized. Did you try to initialize it manually

问题 Having these dependencies: dependencies { implementation "androidx.work:work-runtime:2.0.1" androidTestImplementation "androidx.work:work-testing:2.0.1" } When running this code for the second time: Configuration config = new Configuration.Builder().build(); WorkManager.initialize(getApplicationContext(), config); this.workManager = WorkManager.getInstance(); I get this error message: java.lang.IllegalStateException: WorkManager is already initialized. Did you try to initialize it manually

问题 I am trying to add an ActionBarSherlock with 4 tabs to my application. I tried to extend from SherlockActivity then SherlockFragmentActivity`, but I still get this Exception: java.lang.IllegalStateException: Action Bar Tab must have a Callback. import java.io.IOException; import java.net.URL; import java.util.ArrayList; import java.util.List; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache

问题 I am having an application where user can register and unregister receiver from Settings to enable and disable service of app. I have taken a toggle button to let user control the app service.I registered a receiver on its on state and unregistered the same on its off state. It works fine when I enable the app service by making toggle button in on state,it successfully registered the receiver and gives me toast. But when I try to click again on toggle button making it in off state,it gives me

问题 I investigate that problem but can not find any solution for my code. I have four classes. But i am sure, no problem on class named Connect(You will see its object on class JsonData below.)So i share the other three classes. My MainActivity is; public class MainActivity extends Activity { String keys[] = {"Message", "Subject", "MessageType", "SentTime", "ToName", "Id"}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout

问题 I am working with sd card and so trying to get permission in runtime. Here is the code: public class MainActivity extends AppCompatActivity implements FileListFragment.OnFragmentInteractionListener { private static final int MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE = 111; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL

问题 I am currently porting an Iphone app to Android and as I had no clue of fragments I thought I gonna try it with them, so I created several classes (one for each view thats presented to the user, all extending baseclass Fragment) and the respective xml layouts. Code below for the fragment that's shown on launch. I use a singleton for every fragment. public class FragWelcome extends Fragment { private static FragWelcome _fs; OnClickListener mListener; public FragWelcome() {} public static

问题 Not sure if this is the right spot to ask but I'm having a Java issue. I have some Java code that works in Java 6 but not in Java 7, the error is: java.lang.IllegalStateException: This function should be called while holding treeLock Using Java6 works but a few of our external users are running Java 7. I figured out the error was caused by a call to validateTree() , which works in java6 but in Java7 we need to call validate() . When I test it locally it works. Here's my problem, I started

问题 Not sure if this is the right spot to ask but I'm having a Java issue. I have some Java code that works in Java 6 but not in Java 7, the error is: java.lang.IllegalStateException: This function should be called while holding treeLock Using Java6 works but a few of our external users are running Java 7. I figured out the error was caused by a call to validateTree() , which works in java6 but in Java7 we need to call validate() . When I test it locally it works. Here's my problem, I started

问题 I have a cancel button which used to just refresh values. Now I have converted them to refresh or reload the page and move to Read-Only page. So changed cancel button to call a function like this, function chkArea(){ var url='<c:out value="${model.contextPath}"/>/abcHandler.do?operation=view; document.forms[0].action=url; document.forms[0].submit(); } Now when I submit cancel, I get the following message in the UI, java.lang.IllegalStateException: Response has already been committed at com