Not able to set Dialog Text Gravity

[Sadeq]

How can i set gravity Title and MessageText in Dialog ?

i write this code in Dialog Class

public void setGravity(int Gravity) { titleTextView.setGravity(Gravity); messageTextView.setGravity(Gravity); }

but returns this error

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setGravity(int)' on a null object reference

[Deleted user]

this.getDialog().setTitle(title);
Text in dialog ,u should inflate view in onCreateView