表情复制粘贴

package com.syswin.toon.view;

import android.content.ClipboardManager;
import android.content.Context;
import android.text.Editable;
import android.text.SpannableString;
import android.util.AttributeSet;
import android.widget.EditText;

import com.syswin.toon.view.emoji.EmojiUtils;

/**
 * 聊天自定义EditText
 * Created by Administrator on 2015/1/21.
 */
public class ChatEditText extends EditText{
    public ChatEditText(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public ChatEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ChatEditText(Context context) {
        super(context);
    }

    @Override
    public boolean onTextContextMenuItem(int id) {

        switch (id) {
            case android.R.id.paste:
                ClipboardManager clip = (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
                int index = getSelectionStart();// 光标所在位置
                String value = clip.getText().toString();
                clip.setText("");
                Editable edit = getEditableText();// 获取EditableText
                SpannableString spannableString = null;
                String zhengze = "\\[[^\\[\\]]{1,3}\\]"; // 正则表达式，用来判断消息内是否有表情
                try {
                    spannableString = EmojiUtils.getExpressionString(getContext(),
                            value, zhengze, 0.7f, false);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                if(spannableString == null){
                    edit.insert(index, "表情匹配错误");//把转换后的CharSequence插入到光标所在位置
                }else{
                    edit.insert(index, spannableString);//把转换后的CharSequence插入到光标所在位置
                }

                //do something
                break;

            default:
                break;
        }

        return super.onTextContextMenuItem(id);
    }
}

复写EditText 从而实现EditText中粘贴事件处理，从而将匹配符替换为表情