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来自天天博客:http://www.cnblogs.com/tiantianbyconan/p/3823429.html
项目中碰到一个问题,情景是这样的:
有一个ListView,每个item中有一个TextView,这个TextView实现了LongClick事件,这个TextView中又添加了ClickableSpan,实现了方法onClick。
我的需求是点击ClickableSpan,则响应ClickableSpan事件;长按ClickableSpan效果跟长按TextView应该一样,都响应TextView的LongClick事件。
然而结果是点击ClickableSpan响应正常;但是长按ClickableSpan时问题出现了:TextView的长按事件响应了,ClickableSpan点击事件也响应了!
研究了一下代码,解决方法如下:
继承LinkMovementMethod,然后重写里面的onTouchEvent方法,在里面判断,如果当前是长按的状态,则不执行ClickableSpan的onClick事件:
package com.kanchufang.privatedoctor.util.spannableparser; import android.text.Layout; import android.text.Selection; import android.text.Spannable; import android.text.method.LinkMovementMethod; import android.text.style.ClickableSpan; import android.view.MotionEvent; import android.widget.TextView; /** * Author: wangjie * Email: tiantian.china.2@gmail.com * Date: 7/3/14. */ public class LinkMovementClickMethod extends LinkMovementMethod{ private long lastClickTime; private static final long CLICK_DELAY = 500l; @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(System.currentTimeMillis() - lastClickTime < CLICK_DELAY){ link[0].onClick(widget); } } else if (action == MotionEvent.ACTION_DOWN) { Selection.setSelection(buffer, buffer.getSpanStart(link[0]), buffer.getSpanEnd(link[0])); lastClickTime = System.currentTimeMillis(); } return true; } else { Selection.removeSelection(buffer); } } return super.onTouchEvent(widget, buffer, event); } public static LinkMovementClickMethod getInstance(){ if(null == sInstance){ sInstance = new LinkMovementClickMethod(); } return sInstance; } private static LinkMovementClickMethod sInstance; }
代码很简单,按住超过500ms,则认定为是长按,则不执行ClickableSpan的onClick
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