LinkTextView.java 文件源码

@Override
public boolean onTouchEvent(TextView widget, Spannable buffer, MotionEvent event) {
    int action = event.getAction();
    if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_DOWN) {
        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) {
            if (action == MotionEvent.ACTION_UP) {
                link[link.length - 1].onClick(widget);
            }

            if (widget instanceof LinkTextView) {
                ((LinkTextView) widget).hitLink = true;
            }
            return true;
        }
        else {
            Touch.onTouchEvent(widget, buffer, event);
            return false;
        }
    }
    return Touch.onTouchEvent(widget, buffer, event);
}