Increase active area for interface widgets to allow slightly out-of-bounds touches to count

People find it difficult to interact with smaller widgets/icons and miss them frequently.
Most misses tend to be very close to the widget edges.
Increasing touchable space using padding will improve the touch accuracy.
Source: Interaction and Recognition Challenges in Interpreting Children's Touch and Gesture Input on Mobile Devices

Use android:padding attribute of view class in layout.xml

android:padding attributes applies padding to all four edges of the widget and it is counted inside the widget.
Hence touches slightly out of the widget will also be recorded.
Use direction name to apply padding in any particular direction. e.g. android:paddingLeft.
Use “dp” unit (density independent pixels) to target devices with different resolutions.
The overall active area of the widget is shown in gray dashed border just for the demo purpose.


				<ImageButton
			        android:id="@+id/active_area_ib_sqr_btn" 
			        android:layout_width="wrap_content"
			        android:contentDescription="@string/active_area_image"
			        android:layout_height="wrap_content"
			        android:src="@drawable/ic_square_icon"
			        android:layout_centerHorizontal="true"
			        android:layout_marginTop="10dp"
			        android:padding="30dp"
			        android:background="@drawable/image_border"/>