MatrixLinkMovementMethod.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) {
                if (link[0] instanceof URLSpan) {
                    if (null != mListener) {
                        URLSpan span = (URLSpan) link[0];
                        mListener.onURLClick(Uri.parse(span.getURL()));
                    }
                } else {
                    link[0].onClick(widget);
                }

            } else if (action == MotionEvent.ACTION_DOWN) {
                Selection.setSelection(buffer,
                        buffer.getSpanStart(link[0]),
                        buffer.getSpanEnd(link[0]));
            }

            return true;
        } else {
            Selection.removeSelection(buffer);
            Touch.onTouchEvent(widget, buffer, event);
            return false;
        }
    }
    return Touch.onTouchEvent(widget, buffer, event);
}