Edittext Inside Expandablelistview Does Not Show Keyboard

I have a custom DialogFragment thats displays an ExpandableListView and its items are EditText. When the EditText gets the focus the input keyboard is not shown, even if I force it

Solution 1:

I found a workaround, its really a trick because I don't really know why does it work. I just added a dummy invisible Edittext at the beginning of DialogFragment XML:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:descendantFocusability="afterDescendants"
>

<EditText
       android:id="@+id/dummyEditText"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:inputType="numberDecimal"            
        android:enabled="false"
        android:visibility="gone"
       />
......