title: sendUserActionEvent() mView== null after clicking on button
body: <p>I have checked with this <a href="https://stackoverflow.com/questions/18028666/senduseractionevent-is-null">link</a> but there its mentioned about long clicks. but I am facing this after clicking on button of custom dialog. 
  I have pasted my code over here. can anyone help me to avoid this error.</p>
  
  <pre><code>  ibtnCancel.setOnClickListener(new OnClickListener() {
  
          @Override
          public void onClick(View v) {
              Log.w("DemoDvicetracker", etConfirmPassword
                  .getText().toString());
              InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
              imm.hideSoftInputFromWindow(
                  etConfirmPassword.getWindowToken(), 0);
  
              passwordPopup.dismiss();
  
          }
          });
  </code></pre>
  
  <p><p></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  
  android:id="@+id/rel"
  android:layout_width="fill_parent"
  android:layout_height="200dp"
  android:background="@drawable/popup_bg" &gt;
  
  &lt;TextView
      android:id="@+id/txt_enter_pwd"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:gravity="center_horizontal"
      android:text="@string/enter_pwd"
      android:textSize="24sp"
      android:textColor="@android:color/black" /&gt;
  
  &lt;EditText
      android:id="@+id/et_password"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_below="@+id/txt_enter_pwd"
      android:hint="@string/pwd" 
      android:background="@drawable/popup_textfeild"
      android:layout_marginTop="30dp"
      android:layout_marginLeft="15dp"
      android:layout_marginRight="15dp"
      android:inputType="textPassword"/&gt;
  
  &lt;LinearLayout
      android:layout_width="fill_parent"
      android:layout_height="60dip"
      android:layout_alignParentBottom="true"
      android:layout_below="@+id/et_password"
      android:gravity="bottom"
      android:orientation="horizontal" &gt;
  
      &lt;ImageButton
          android:id="@+id/ibtn_dialog_cancel"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_weight="1"
          android:background="@drawable/popup_cancel_selector" 
          android:contentDescription="@string/cancel"/&gt;
  
      &lt;ImageButton
          android:id="@+id/ibtn_dialog_submit"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_marginLeft="0dp"
          android:layout_weight="1"
          android:background="@drawable/popup_submit_selector" 
          android:contentDescription="@string/submit"/&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p></p>