[Android]解决ClickableSpan中点击后ListView中item的长按冲突的问题


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

 



来源博客:Wang Jie's Blog
本文链接:https://blog.wangjiegulu.com/2014/07/03/Android-解决ClickableSpan中点击后ListView中item的长按冲突的问题/
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