NameTouchMovementMethod.java 文件源码

public boolean onTouchEvent(TextView widget, Spannable buffer,
                            MotionEvent event) {
    int offSet = getOffsetForHorizontal(widget, event);
    ClickableSpan[] spanName = buffer.getSpans(offSet, offSet, ClickableSpan.class);
    if (spanName.length == 0) {
        Selection.removeSelection(buffer);
        return Touch.onTouchEvent(widget, buffer, event);
    }
    ClickableSpan span = spanName[0];
    switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            setSapnBackgroundGrayEffect(span, buffer);
            Selection.setSelection(buffer,
                    buffer.getSpanStart(span),
                    buffer.getSpanEnd(span));
            break;
        case MotionEvent.ACTION_UP:
            newClickTask(new ClickTask(span, widget));
            resetSapnBackground(span, buffer);
            break;
        case MotionEvent.ACTION_CANCEL:
            removeAllTask();
            resetSapnBackground(span, buffer);
            break;
    }
    return Touch.onTouchEvent(widget, buffer, event);
}