Place all the buttons to anywhere on screen.

In version 2.0.0 or above, the place-alignment of boom-buttons on the screen(or its parent-view) is able to customized. This is helpful when BMB is used in pad(picture above). You can set this attribute by:

bmb.setButtonPlaceAlignmentEnum(ButtonPlaceAlignmentEnum.BL);

Or in .xml:

app:bmb_buttonPlaceAlignmentEnum="buttonPlaceAlignment_bl"

The meanings of each button-place-alignment-enum:

1. ButtonPlaceAlignmentEnum.Center(in .java) or buttonPlaceAlignment_center(in .xml)
   Center.
2. ButtonPlaceAlignmentEnum.Top(in .java) or buttonPlaceAlignment_top(in .xml)
   Top.
3. ButtonPlaceAlignmentEnum.Bottom(in .java) or buttonPlaceAlignment_bottom(in .xml)
   Bottom.
4. ButtonPlaceAlignmentEnum.Left(in .java) or buttonPlaceAlignment_left(in .xml)
   Left.
5. ButtonPlaceAlignmentEnum.Right(in .java) or buttonPlaceAlignment_right(in .xml)
   Right.
6. ButtonPlaceAlignmentEnum.TL(in .java) or buttonPlaceAlignment_tl(in .xml)
   Top-Left.
7. ButtonPlaceAlignmentEnum.TR(in .java) or buttonPlaceAlignment_tr(in .xml)
   Top-Right.
8. ButtonPlaceAlignmentEnum.BL(in .java) or buttonPlaceAlignment_bl(in .xml)
   Bottom-Left.
9. ButtonPlaceAlignmentEnum.BR(in .java) or buttonPlaceAlignment_br(in .xml)
   Bottom-Right.

Boom-buttons is able to customize the margin between surroundings. For example:

bmb.setButtonTopMargin(10);
bmb.setButtonBottomMargin(10);
bmb.setButtonLeftMargin(10);
bmb.setButtonRightMargin(10);

Or in .xml:

app:bmb_buttonTopMargin="1dp"
app:bmb_buttonBottomMargin="1dp"
app:bmb_buttonLeftMargin="1dp"
app:bmb_buttonRightMargin="1dp"