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

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

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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