无法打开从QuickAction AlertDialog

Question

我试图显示AlertDialog QuickAction按钮时按下。但我的应用程序崩溃时，试图完成此任务。我不知道是什么导致错误。我也尝试使用线程。休眠给QuickAction时间适当dimiss和显示AlertDialog但它没有工作。

我做了研究，发现一个问题：Starting Dialog from QuickAction Button

这个问题有点类似地雷，但是当我试图与MyClass.class更换getApplicationContext（）我得到一个错误，指出构造AlertDialog.builder（类）未定义。

以下是部分代码QuickAction和AlertDialog的：

ActionItem editQItem = new ActionItem(ID_EDIT_Q, "Edit", getResources() 
      .getDrawable(R.drawable.qa_edit)); 
    ActionItem deleteQItem = new ActionItem(ID_DELETE_Q, "Delete", 
      getResources().getDrawable(R.drawable.qa_delete_answer)); 
    System.out.println("Blah 1"); 

    mQuickActionQ = new QuickAction(this); 
    mQuickActionQ.addActionItem(editQItem); 
    mQuickActionQ.addActionItem(deleteQItem); 
    System.out.println("Blah 2"); 

    // setup the action item click listener 
    mQuickActionQ 
      .setOnActionItemClickListener(new QuickAction.OnActionItemClickListener() { 
       public void onItemClick(QuickAction quickAction, int pos, 
         int actionId) { 
        ActionItem actionItem = quickAction.getActionItem(pos); 
        System.out.println("Blah 3"); 
        if (actionId == ID_EDIT_Q) { 
//Here im getting error from here onwards when trying to display AlertDialog 
         et_question = new EditText(getApplicationContext()); 
         et_tag1 = new EditText(getApplicationContext()); 
         et_tag2 = new EditText(getApplicationContext()); 
         et_tag3 = new EditText(getApplicationContext()); 
         et_question.setText(question); 
         et_tag1.setText(q_tag1); 
         et_tag2.setText(q_tag2); 
         et_tag3.setText(q_tag3); 
         tv_question = new TextView(getApplicationContext()); 
         tv_question.setText("Question:"); 
         tv_question.setTextSize(15); 
         tv_tags = new TextView(getApplicationContext()); 
         tv_tags.setText("Tags:"); 
         tv_tags.setTextSize(15); 
         ll_edit = new LinearLayout(getApplicationContext()); 
         ll_edit.setOrientation(1); 
         ll_edit.addView(tv_question); 
         ll_edit.addView(et_question); 
         ll_edit.addView(tv_tags); 
         ll_edit.addView(et_tag1); 
         ll_edit.addView(et_tag2); 
         ll_edit.addView(et_tag3); 
         AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext()); 
         builder.setMessage("Edit"); 
         builder.setCancelable(true); 
         builder.setView(ll_edit); 
         builder.setPositiveButton("Save Changes", 
           new DialogInterface.OnClickListener() { 
            public void onClick(DialogInterface dialog, int id) { 
             boolean Success = true; 
             Editable ttv = et_question.getText(); 
             final String answer = new StringBuilder().append(
               ttv).toString(); 
             if (answer.equals("")) { 
              Dialog mTag = new Dialog(
                getApplicationContext()); 
              mTag.setTitle("One of the field is empty!"); 
              TextView tv2 = new TextView(
                getApplicationContext()); 
              tv2.setText("Blank fields are not allowed."); 
              mTag.setContentView(tv2); 
              mTag.setCancelable(true); 
              mTag.show(); 
             } else { 
              String uname = qun.getText().toString(); 
              String question = qu.getText().toString(); 
              String question_time = qpo.getText().toString(); 
              String new_question = et_question.getText() 
                .toString(); 
              String new_tag1 = et_tag1.getText().toString(); 
              String new_tag2 = et_tag2.getText().toString(); 
              String new_tag3 = et_tag3.getText().toString(); 
              uf = new UserFunctions(); 
              HashMap<String, String> hm = new HashMap<String, String>(); 
              db = new DatabaseHandler(
                getApplicationContext()); 
              db.getReadableDatabase(); 
              hm = db.getUserDetails(); 
              db.close(); 
              String username = hm.get("username"); 
              JSONObject json = uf.updateQuestion(username, 
                question, question_time, new_question, 
                new_tag1, new_tag2, new_tag3); 
              dialog.dismiss(); 
              pd = ProgressDialog.show(ViewMyQuestion.this, 
                "Please wait...", 
                "Updating your question!", true, false); 
              Thread thread = new Thread(ViewMyQuestion.this); 
              thread.start(); 
              tagcombo = new_tag1 + "," + new_tag2 + "," 
                + new_tag3; 
              qun.setText(username); 
              qtag.setText(tagcombo); 
              qu.setText(new_question); 
             }// end of if else 
            } 
           }); 

         builder.setNegativeButton("Cancel", 
           new DialogInterface.OnClickListener() { 
            public void onClick(DialogInterface dialog, int id) { 
             dialog.cancel(); 
            } 
           }); 
         AlertDialog alert = builder.create(); 
         alert.show(); 
        } else { 
         System.out.println("Blah 4"); 
         Toast.makeText(getApplicationContext(), 
           actionItem.getTitle() + " selected", 
           Toast.LENGTH_SHORT).show(); 
        } 
       } 
      }); 

    mQuickActionQ.setOnDismissListener(new QuickAction.OnDismissListener() { 
     public void onDismiss() { 
      Toast.makeText(getApplicationContext(), "Ups..dismissed", 
        Toast.LENGTH_SHORT).show(); 
     } 
    }); 

以下是logcat的消息：

07-05 18:01:27.158: E/AndroidRuntime(389): FATAL EXCEPTION: main 
07-05 18:01:27.158: E/AndroidRuntime(389): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application 
07-05 18:01:27.158: E/AndroidRuntime(389): at android.view.ViewRoot.setView(ViewRoot.java:509) 
07-05 18:01:27.158: E/AndroidRuntime(389): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177) 
07-05 18:01:27.158: E/AndroidRuntime(389): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 
07-05 18:01:27.158: E/AndroidRuntime(389): at android.app.Dialog.show(Dialog.java:241) 
07-05 18:01:27.158: E/AndroidRuntime(389): at com.vervecoders.cuqu.ViewMyQuestion$3.onItemClick(ViewMyQuestion.java:222) 
07-05 18:01:27.158: E/AndroidRuntime(389): at com.vervecoders.cuqu.QuickAction$2.onClick(QuickAction.java:162) 
07-05 18:01:27.158: E/AndroidRuntime(389): at android.view.View.performClick(View.java:2408) 
07-05 18:01:27.158: E/AndroidRuntime(389): at android.view.View$PerformClick.run(View.java:8816) 
07-05 18:01:27.158: E/AndroidRuntime(389): at android.os.Handler.handleCallback(Handler.java:587) 
07-05 18:01:27.158: E/AndroidRuntime(389): at android.os.Handler.dispatchMessage(Handler.java:92) 
07-05 18:01:27.158: E/AndroidRuntime(389): at android.os.Looper.loop(Looper.java:123) 
07-05 18:01:27.158: E/AndroidRuntime(389): at android.app.ActivityThread.main(ActivityThread.java:4627) 
07-05 18:01:27.158: E/AndroidRuntime(389): at java.lang.reflect.Method.invokeNative(Native Method) 
07-05 18:01:27.158: E/AndroidRuntime(389): at java.lang.reflect.Method.invoke(Method.java:521) 
07-05 18:01:27.158: E/AndroidRuntime(389): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
07-05 18:01:27.158: E/AndroidRuntime(389): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
07-05 18:01:27.158: E/AndroidRuntime(389): at dalvik.system.NativeStart.main(Native Method) 

谢谢

Answer 1

尝试的AlertDialog.Builder builder = new AlertDialog.Builder(yourActivityName.this);代替AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());