在我的应用程序，我呼吁点击一个按钮一个异步任务，我使用preexecute方法来启动进度对话框，并onpostexecute结束一样。

我收到此错误而实施上述 - 查看未连接到窗口管理器

下面是我的异步code -

  / ** *异步任务类，通过HTTP调用获得JSON * /私有类questionfeed_async扩展的AsyncTask＆LT;太虚，太虚，太虚＆GT; {    @覆盖    在preExecute保护无效（）{        // TODO自动生成方法存根        super.on preExecute（）;        pDialog =新ProgressDialog（getActivity（））;        pDialog.setMessage（你好+使用者名称+装入你的问题进！）;        pDialog.show（）;    }    @覆盖    保护无效doInBackground（虚空...... PARAMS）{        // TODO自动生成方法存根    }    @覆盖    保护无效onPostExecute（虚空结果）{        // TODO自动生成方法存根        super.onPostExecute（结果）;       如果（pDialog.isShowing（））{           pDialog.dismiss（）;       }    } 

我有在SOF后的问题给出了一些解决方案。他们尝试过但没有成功。

logcat的 -

java.lang.IllegalArgumentException异常：查看没有连接到窗口管理器的    android.view.WindowManagerImpl.findViewLocked（WindowManagerImpl.java:670）    在    android.view.WindowManagerImpl.removeView（WindowManagerImpl.java:351）    在    android.view.WindowManagerImpl $ CompatModeWrapper.removeView（WindowManagerImpl.java:162）    在android.app.Dialog.dismissDialog（Dialog.java:319）在    android.app.Dialog.dismiss（Dialog.java:302）在    cheerz.fragment.Profile_Fragment $ user_detail_async.onPostExecute（Profile_Fragment.java:207）    在    cheerz.fragment.Profile_Fragment $ user_detail_async.onPostExecute（Profile_Fragment.java:149）    在android.os.AsyncTask.finish（AsyncTask.java:631）在    android.os.AsyncTask.access $ 600（AsyncTask.java:177）在    android.os.AsyncTask $ InternalHandler.handleMessage（AsyncTask.java:644）    在android.os.Handler.dispatchMessage（Handler.java:99）在    android.os.Looper.loop（Looper.java:153）在    android.app.ActivityThread.main（ActivityThread.java:5034）在    java.lang.reflect.Method.invokeNative（本机方法）的    java.lang.reflect.Method.invoke（Method.java:511）在    com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:821）    在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:584）在    dalvik.system.NativeStart.main（本机方法）

使用code：

 如果（pDialog！= NULL）{       pDialog.dismiss（）;   } 

的insted的：

 如果（pDialog.isShowing（））{       pDialog.dismiss（）;   } 

In my app, I am calling an async task on a button click and I am using onpreexecute method to start "progress dialog" and onpostexecute to end the same.

I am getting this error while implementing the above - "View not attached to window manager."

Here is my async code -

/**
 * Async task class to get json by making HTTP call
 */
private class questionfeed_async extends AsyncTask<Void, Void, Void> {

    @Override
    protected void onPreExecute() {
        // TODO Auto-generated method stub
        super.onPreExecute();

        pDialog = new ProgressDialog(getActivity());
        pDialog.setMessage("Hi "+userName+ "! Loading your question feed ");
        pDialog.show();

    }


    @Override
    protected Void doInBackground(Void... params) {
        // TODO Auto-generated method stub


    }

    @Override
    protected void onPostExecute(Void result) {
        // TODO Auto-generated method stub
        super.onPostExecute(result);
       if (pDialog.isShowing()) {
           pDialog.dismiss();
       }
    }

I There are some solution given in SOF post question. try them too yet did not success.

Logcat -

java.lang.IllegalArgumentException: View not attached to window manager at android.view.WindowManagerImpl.findViewLocked(WindowManagerImpl.java:670) at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:351) at android.view.WindowManagerImpl$CompatModeWrapper.removeView(WindowManagerImpl.java:162) at android.app.Dialog.dismissDialog(Dialog.java:319) at android.app.Dialog.dismiss(Dialog.java:302) at cheerz.fragment.Profile_Fragment$user_detail_async.onPostExecute(Profile_Fragment.java:207) at cheerz.fragment.Profile_Fragment$user_detail_async.onPostExecute(Profile_Fragment.java:149) at android.os.AsyncTask.finish(AsyncTask.java:631) at android.os.AsyncTask.access$600(AsyncTask.java:177) at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:153) at android.app.ActivityThread.main(ActivityThread.java:5034) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584) at dalvik.system.NativeStart.main(Native Method)

use this code:

if (pDialog != null) {
       pDialog.dismiss();
   }

Insted of:

if (pDialog.isShowing()) {
       pDialog.dismiss();
   }