Wie Fortschrittsdialog in Android angezeigt wird

Question

Ich habe ein Fragment, das Fortschrittsdialog enthält, ich implementierte Fortschrittsdialogcode in einer anderen Klasse, die als DialogUtils bekannt ist, und wenn ich Fortschrittsdialog anzeigen und abbrechen will, gibt es mir Fehler. Bitte lösen Sie mein Problem.

Code: -

public void postDealListingDatatoServer() { 
    try { 
     String json; 
     // 3. build jsonObject 
     final JSONObject jsonObject = new JSONObject();// making object of Jsons. 
     jsonObject.put("agentCode", m_szMobileNumber);// put mobile number 
     jsonObject.put("pin", m_szEncryptedPassword);// put password 
     jsonObject.put("recordcount", sz_RecordCount);// put record count 
     jsonObject.put("lastcountvalue", sz_LastCount);// put last count 
     System.out.println("Record Count:-" + sz_RecordCount); 
     System.out.println("LastCount:-" + sz_LastCount); 
     // 4. convert JSONObject to JSON to String 
     json = jsonObject.toString();// convert Json object to string 

     Log.i(TAG, "Server Request:-" + json); 
     m_Dialog = DialogUtils.showProgressDialog(getActivity(), "Please wait while loading deals..."); 
     JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, m_DealListingURL, jsonObject, new Response.Listener<JSONObject>() { 
      @Override 
      public void onResponse(JSONObject response) { 
       Log.i(TAG, "Server Response:-" + response); 
       m_Dialog.dismiss(); 
       try { 
        JSONArray posts = response.optJSONArray("dealList");// get Deal list in array from response 
        s_oDataset.clear(); 
        for (int i = 0; i < posts.length(); i++) {// loop for counting deals from server 
         JSONObject post = posts.getJSONObject(i);// counting deal based on index 
         item = new CDealAppDatastorage();// creating object of DealAppdata storage 
         item.setM_szHeaderText(post.getString("dealname"));// get deal name from response 
         item.setM_szsubHeaderText(post.getString("dealcode"));// get dealcode from response 
         item.setM_szDealValue(post.getString("dealvalue"));// get deal value from response 
         item.setM_n_Image(m_n_FormImage[i]);//set Image Index wise(Dummy) 
         s_oDataset.add(item);// add all items in ArrayList 

        } 


        if (!s_oDataset.isEmpty()) {// condition if data in arraylist is not empty 
         m_oAdapter = new CDealAppListingAdapter(getActivity(), s_oDataset);// create adapter object and add arraylist to adapter 
         m_ListView.setAdapter(m_oAdapter);//adding adapter to recyclerview 
         m_NoInternetWarning.setVisibility(View.GONE); 
         mSwipeRefresh.setVisibility(View.VISIBLE); 

        } else { 
         m_ListView.removeFooterView(mFooter);// else Load buttonvisibility set to Gone 
        } 

        if (response.getString("resultdescription").equalsIgnoreCase("Connection Not Available")) {//server based conditions 
         CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "Connection Lost !", getActivity()); 
        } else if (response.getString("resultdescription").equalsIgnoreCase("Deal List Not Found")) {// serevr based conditions ..... 
         CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "No more deals available", getActivity()); 
        } else if (response.getString("resultdescription").equalsIgnoreCase("Technical Failure")) { 
         CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "Technical Failure", getActivity()); 
        } 

       } catch (JSONException e) { 
        e.printStackTrace(); 
       } 
      } 
     }, new Response.ErrorListener() { 
      @Override 
      public void onErrorResponse(VolleyError error) { 
       Log.e(TAG, "Server error:-" + error); 
        m_Dialog.dismiss(); 
       if (error instanceof TimeoutError) { 
        CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "Connection lost ! Please try again", getActivity()); 
       } else if (error instanceof NetworkError) { 
        CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "No internet connection", getActivity()); 
        mSwipeRefresh.setVisibility(View.GONE); 
        m_NoInternetWarning.setVisibility(View.VISIBLE); 
       } 

      } 


}); 
      RequestQueue requestQueue = Volley.newRequestQueue(getActivity()); 
      requestQueue.add(jsonObjectRequest); 
     } catch (JSONException e) { 
      e.printStackTrace(); 
     } 

    } 

Dialog Utils ::

public class DialogUtils { 

    public static ProgressDialog showProgressDialog(Context context, String message) { 
     ProgressDialog m_Dialog = new ProgressDialog(context); 
     m_Dialog.setMessage(message); 
     m_Dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER); 
     m_Dialog.setCancelable(false); 
     m_Dialog.show(); 
     return m_Dialog; 

    } 

} 

Fehler: -

java.lang.IllegalArgumentException: View=com.android.internal.policy.impl.PhoneWindow$DecorView{41fcfce0 V.E..... R......D 0,0-480,144} not attached to window manager 
                        at android.view.WindowManagerGlobal.findViewLocked(WindowManagerGlobal.java:370) 
                        at android.view.WindowManagerGlobal.removeView(WindowManagerGlobal.java:299) 
                        at android.view.WindowManagerImpl.removeViewImmediate(WindowManagerImpl.java:84) 
                        at android.app.Dialog.dismissDialog(Dialog.java:360) 
                        at android.app.Dialog.dismiss(Dialog.java:343) 
                        at com.example.devui1.rewardapp.CDealAppListing$4.onResponse(CDealAppListing.java:243) 
                        at com.example.devui1.rewardapp.CDealAppListing$4.onResponse(CDealAppListing.java: 

Answer 1

zuerst die Aktivität Orientierung in android manifestieren

gesetzt

android:screenOrientation="portrait"

und vor

`"m_Dialog.dismiss()"` 

einen Scheck für null und isShowing()

if(m_Dialog!=null && m_Dialog.isShowing()){ m_Dialog.dismiss(); }