My objective is get the View from my custom Preference to add a KeyListener who listens the key events of right and left, and if the user send a left/right event when the Seekbar is selected, it will move the pointer to the left/right.

Help me please.
If you are using a custom Preference, you can override the onBindView method, which receives the
Viewobject mapped to yourPrefenceinstance. With that, you can add the corresponding listeners.