标签: illegalstateexception

我不明白为什么我得到臭名昭着的"IllegalStateException"与以下代码:

private void mergeQueryStrings(String url, Map parameterMap) {
    String queryString = getQueryString(url);
    if(queryString!=null){
        String [] params = queryString.split("&");
        for(String param:params){
            parameterMap.put(param.split("=")[0], param.split("=")[1]);
        }
    }
}

谁能开导我？

我有一个使用JSF 2.0.2在Glassfish服务器上运行的Java应用程序.

在JSF级别我有以下方法调用.

<h:commandLink action="#{printWB.doOpenVehicleToPrintInPDF}" target="_blank">Print</h:commandLink>

我的方法doOpenVehicleToPrintInPDF定义如下:

public String doOpenVehicleToPrintInPDF() {
    FacesContext ctxt = FacesContext.getCurrentInstance();
    HttpServletResponse response = (HttpServletResponse) ctxt.getExternalContext().getResponse();       

    try {
        response.setContentType("application/pdf");
        response.setHeader("Content-disposition", "attachment; filename=\"" + configUrl + ".pdf\"");

        final ServletOutputStream stream = response.getOutputStream();

        final VehiclePrintSummaryToPdf vehiclePrintPdf = new VehiclePrintSummaryToPdf(ctxt, summary);
        vehiclePrintPdf.createPdfDocument(stream, summary);
        stream.flush();
        Validate.isTrue(response.isCommitted());
        stream.close();
    } catch (Exception ex) {
       LOG.error("Error in PDF print processing!", ex);            
    }
    return null;
}

调用该方法,生成PDF(使用itext库),然后抛出下面的异常.我调试了这个,并且在返回null之后出现异常;

任何暗示这里有什么问题以及如何避免这种异常？

提前致谢.

java.lang.IllegalStateException
    at org.apache.coyote.tomcat5.CoyoteResponseFacade.setBufferSize(CoyoteResponseFacade.java:260)
    at com.sun.faces.context.ExternalContextImpl.setResponseBufferSize(ExternalContextImpl.java:795)
    at com.sun.faces.application.view.FaceletViewHandlingStrategy.createResponseWriter(FaceletViewHandlingSt
    at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.jav
    at …

我遇到了这个问题,同时尝试自动装配一个可运行的类,并在不同的调用中创建它的不同实例并将其保存在一个数组中.

xml配置是:

<bean name="threadName" Class="ABC" scope="prototype" />

在我的代码中,我正在尝试这样的事情:

public class ThreadHandler{


@Autowired
private ABC threadName;

//getter
ABC getThreadName(){
     return threadName;
}

public void someFunction(){
     List<ABC> abc = new ArrayList(ABC>();
     for (int i=0;i<SOME_CONST;i++){
          ABC tName = getThreadName();
          abc.add(tName);
          tName.start();
      }
}   

}

让我们ABC成为一个班级Thread/Runnable/Callable.

通过这种方式,它会抛出java.lang.IllegalThreadStateException.但是,如果我使用它,它的工作正常ABC tName =appContext.getBean("threadName",ABC.class);

为什么会这样？

在尝试从getMethod获取对象时,我们不会获得新实例吗？

我知道还有很多其他帖子处理同样的错误，但所有这些帖子要么是关于 JSP/GSP 页面的，要么是出于任何其他原因对我来说不是很有帮助。我正在使用带有 Thymeleaf 的 Spring MVC。以下函数用于下载文件。

@RequestMapping(value = "/test/download/*", method = RequestMethod.GET)
public String getFile(HttpServletResponse response)
{

    ServletOutputStream stream = null;
    try
    {
        stream = response.getOutputStream();

        MultipartFile f = test.getFile();

        InputStream is = f.getInputStream();
        IOUtils.copy(is, stream);
        response.flushBuffer();

        stream.flush();
        stream.close();

    } catch(Exception ex)
    {

    }

    return "test";

}

它确实有效，所以问题不大，但在控制台中，我总是收到以下错误：

2014-01-10T09:28:09.053+0100  SEVERE  Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception  [Request processing failed; nested exception is java.lang.IllegalStateException: getOutputStream() has already been called for this response] with root cause …

我正在尝试在删除按钮上使用警报对话框。但是显示对话框显示异常。当我单击删除时，它会崩溃并在 .show 上显示异常。

我尝试为此活动使用 Theme.AppCompat 主题，但它仍然崩溃。

   <activity android:name=".AddEventActivity"
        android:theme="@style/Theme.AppCompat">
    </activity>


        delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                new AlertDialog.Builder(getApplicationContext())
                        .setTitle("Delete entry")
                        .setMessage("Are you sure you want to delete this entry?")
                        .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int which) {

                                Toast.makeText(getApplicationContext(), "Yaay", Toast.LENGTH_SHORT).show();
                                i = new Intent();
                                db.deleteEvent(eventData);
                                Log.i("d", "delete");
                                setResult(RESULT_OK, i);
                                finish();

                                // continue with delete
                            }
                        })
                        .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int which) {
                                // do nothing
                            }
                        })
                        .setIcon(android.R.drawable.ic_dialog_alert)
                        .show(); …

我的应用程序使用PrintManager进行PDF打印.此功能在Android L和M中运行良好,但在Android N下失败.

在onOptionsItemSelected()的选项菜单中的非片段活动中调用打印操作.

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
    String jobName = "createPDFReport";
    printManager.print(jobName, new InterimReportAdapter(AuditValidation.this, auditObject), new PrintAttributes.Builder().build());
}

Android N抛出

FATAL EXCEPTION: ec.kat.kataudit, PID: 4052
java.lang.IllegalStateException: Can print only from an activity
at android.print.PrintManager.print(PrintManager.java:525)
at ec.kat.kataudit.AuditValidation.onOptionsItemSelected(AuditValidation.java:124)
at android.app.Activity.onMenuItemSelected(Activity.java:3204)
at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:408)
at android.support.v7.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.java:195)
...

AuditValidation.java:124指向printManager.print()调用.

Activity扩展了android.support.v7.app.AppCompatActivity.编译目标版本为25,app正在使用最新的库(截至今天为25.3.1).

任何想法都非常感谢!

最好的祝福!

I'm starting an IntentService from MainActivity:onCreate and I noticed this crash from the crash reporting only on Android Oreo above:

java.lang.IllegalStateException: Not allowed to start service Intent { cmp=com.company.mobile/com.company.mobile.gcm.RegistrationIntentService }: app is in background uid UidRecord{c96fbae u0a184 TPSL idle procs:1 seq(0,0,0)}
    at android.app.ContextImpl.startServiceCommon()(ContextImpl.java:1577)
    at android.app.ContextImpl.startService()(ContextImpl.java:1532)
    at android.content.ContextWrapper.startService()(ContextWrapper.java:664)
    at cs.a()(FirebaseUtility.java:42)
    at com.company.mobile.MainActivity.onCreate()(MainActivity.java:81)
    at android.app.Activity.performCreate()(Activity.java:7136)
    at android.app.Activity.performCreate()(Activity.java:7127)
    at android.app.Instrumentation.callActivityOnCreate()(Instrumentation.java:1271)
    at android.app.ActivityThread.performLaunchActivity()(ActivityThread.java:2893)
    at android.app.ActivityThread.handleLaunchActivity()(ActivityThread.java:3048)
    at android.app.servertransaction.LaunchActivityItem.execute()(LaunchActivityItem.java:78)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks()(TransactionExecutor.java:108)
    at android.app.servertransaction.TransactionExecutor.execute()(TransactionExecutor.java:68)
    at android.app.ActivityThread$H.handleMessage()(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage()(Handler.java:106)
    at android.os.Looper.loop()(Looper.java:193)
    at android.app.ActivityThread.main()(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke()(Method.java:-2)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run()(RuntimeInit.java:493)
    at …

下面是抛出错误消息的代码

“ java.lang.illegal 状态异常：Fragment 必须是公共静态类才能从实例状态正确重新创建”

下面的代码片段只有在我**compile 'com.google.android.gms:play-services-ads:11.8.0'在 build.gradle 文件中包含**后才会抛出错误，否则工作正常。

public void selectDate(View view) {
            DialogFragment newFragment = new SelectDateFragment();
            newFragment.show(getFragmentManager(), "DatePicker");
        }

@SuppressLint("ValidFragment")
public class SelectDateFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {
            @Override
            public Dialog onCreateDialog(Bundle savedInstanceState) {
                final Calendar calendar = Calendar.getInstance();
                int yy = calendar.get(Calendar.YEAR);
                int mm = calendar.get(Calendar.MONTH);
                int dd = calendar.get(Calendar.DAY_OF_MONTH);
                return new DatePickerDialog(getActivity(), this, yy, mm, dd);
            }

我正在获取一个加载对象，等待来自Web服务的请求。但是有时该对象导致我的应用程序结束。我无法准确检测出所涉及的错误。

为了防止发生此错误，我在传递活动时将对象称为“ dismiss”和“ cancel”，但这没有用。然后，我分配了“ null”值，该值也不起作用。我没有再工作，因为我以为我在跟Tag打交道。

我的错误代码；

2019-03-27 11:51:20.502 29685-29685/com.xxxx.app E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.xxxx.app, PID: 29685
    java.lang.IllegalStateException: Fragment already added: DelayedProgressDialog{d8bd442 #1 Delaleyed}
        at androidx.fragment.app.FragmentManagerImpl.addFragment(FragmentManager.java:1916)
        at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:765)
        at androidx.fragment.app.FragmentManagerImpl.executeOps(FragmentManager.java:2625)
        at androidx.fragment.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2411)
        at androidx.fragment.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2366)
        at androidx.fragment.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2273)
        at androidx.fragment.app.FragmentManagerImpl$1.run(FragmentManager.java:733)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:6981)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1445)

我的使用进度对话框类；

    public class DelayedProgressDialog extends DialogFragment {
    private static final int DELAY_MILLISECOND = 450;
    private static final int MINIMUM_SHOW_DURATION_MILLISECOND = 300;
    private static final int PROGRESS_CONTENT_SIZE_DP = …

在我的 Android 应用程序中，我使用Room本地数据库来存储用户的帐户信息。当我发出一个简单的Room请求来检索Account存储在数据库中的对象时，我收到以下错误消息：

java.lang.IllegalStateException: Cannot access database on the main thread since it may potentially lock the UI for a long period of time.

这是Fragment我发出本地数据库请求的代码：

// AccountInformationFragment.kt


accountDataFragmentViewModel.retrieveAccountData(accountId).observe(viewLifecycleOwner, Observer {
       // do some stuff
    })

在ViewModel课堂上我是这样实现的retrieveAccountData()：

    // AccountInformationFragmentViewModel.kt        

    // used to get the account from the local datasource
    fun retrieveAccountData(id:Long): LiveData<Account>{
        val result = MutableLiveData<Account>()
        viewModelScope.launch {
            val account = authRepository.retrieveAccountData(id)
            result.postValue(account) 
        }
        return result
    }

在Repository …