Draggable Button

DraggableView.java

public class DraggableView extends Button {

    float dX;
    float dY;

    public DraggableView(Context context) {
        super(context);
    }

    public DraggableView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public DraggableView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public boolean onTouchEvent(MotionEvent motionEvent) {
        switch (motionEvent.getActionMasked()){
            case MotionEvent.ACTION_DOWN:
                dX = getX() - motionEvent.getRawX();
                dY = getY() - motionEvent.getRawY();
                break;
            case MotionEvent.ACTION_MOVE:
                setY(motionEvent.getRawY() + dY);
                setX(motionEvent.getRawX() + dX);
                break;
            case MotionEvent.ACTION_UP:
                break;
            default:
                return false;

        }
        return true;
    }
}