xml - How to underline text of button in Android? -

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i new in android programming.i developing simple app . have button transparent , has icon , text. want underline text of button have not been able this. below xml code:

<button  android:id="@+id/park"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:drawableleft="@drawable/park"  android:text="@string/button_name"  android:background="#00000000"  android:textcolor="#000000"/>

and string file has:

<resources>   <string name="button_name"><u>parking areas</u></string> </resources

this approa ch works in textview not in button.

-any suggestion?

button button = (button) findviewbyid(r.id.park); button.setpaintflags(button.getpaintflags() | paint.underline_text_flag);

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