Create no border button
Hey, did you enjoy Android?
iOS7’s button is flat design and no border button.
How about Android?
Above Android 4.0, some UI components become flat design. But some are not.
Create no border button by xml
Just example
<Button android:id="@+id/backBtn" android:layout_width="50dip" android:layout_height="45dip" style="@android:style/Widget.Holo.Light.Button.Borderless.Small" android:textSize="20sp" android:textColor="@color/sky" android:padding="0px" android:layout_gravity="center_vertical" android:text="@string/back" />
The key part is style. @android:style/Widget.Holo.Light.Button.Borderless.Small border less button.
By default, text size is small, but you can change size by using textSize.