CharFileViewer.java 文件源码

@Override
protected void onResume()
{
    super.onResume();
    getNoteFromFile();
    // Make sure that we don't use the link movement method.
    // Instead, we need a blend between the arrow key movement (for regular
    // navigation) and
    // the link movement (so the user can click on links).
    // TODO: Might be able to edit this, since we don't care about
    // linkifying text
    mText.setMovementMethod(new ArrowKeyMovementMethod()
    {
        public boolean onTouchEvent(TextView widget, Spannable buffer, MotionEvent event)
        {
            // This block is copied and pasted from LinkMovementMethod's
            // onTouchEvent (without the part that actually changes the
            // selection).
            int action = event.getAction();

            if (action == MotionEvent.ACTION_UP)
            {
                int x = (int) event.getX();
                int y = (int) event.getY();

                x -= widget.getTotalPaddingLeft();
                y -= widget.getTotalPaddingTop();

                x += widget.getScrollX();
                y += widget.getScrollY();

                Layout layout = widget.getLayout();
                int line = layout.getLineForVertical(y);
                int off = layout.getOffsetForHorizontal(line, x);

                ClickableSpan[] link = buffer.getSpans(off, off, ClickableSpan.class);

                if (link.length != 0)
                {
                    link[0].onClick(widget);
                    return true;
                }
            }

            return super.onTouchEvent(widget, buffer, event);
        }
    });

}