Question

我目前正在开发一个简单的聊天应用程序。我想在这个应用程序中添加表情符号功能。我已经有一个函数来从其他用户接收字符串。我想要的是 - 如果用户发送的文本包含CharSequence，如“：D”或“：p”，我希望将它们更改为表情符号。我该如何实现这个功能？

我想要一个这样的函数：

public void updateMessage(){
    if (receivedMessage.contains(":D")){
        receivedMessage.replace(":D",image);
    }
    messageLog.append(receivedMessage);
}

如果可能，请帮助我。如果还有其他方法，请提及。

Answer 1

您可以尝试这样

 if (rosan.contains(":p")){
            int span = abc.indexOf(":p");
            res = getResources().getDrawable(R.drawable.myImage); 
            res.setBounds(0, 0, res.getIntrinsicWidth(), res.getIntrinsicHeight());
            span = new ImageSpan(res, ImageSpan.ALIGN_BASELINE);
            ss.setSpan(span, startSpan, startSpan+2, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
            rosan = rosan.replaceFirst(":D","  "); //replace with two blank spaces.
        }

Answer 2

可以使用 SpannableString 轻松实现。这是代码中的示例实现。

package com.jslan.nabin.emosample;

import android.graphics.drawable.Drawable;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.ImageSpan;
import android.widget.EditText;


public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        EditText textBox = (EditText) findViewById(R.id.textBox);//I have created an EditText named textBox in activity_main.xml
        Drawable d;
        ImageSpan span;
        String abc = "some :D message :D";
        SpannableString ss = new SpannableString(abc);
        for(int i = 0; i<abc.length();i++){//loop to check presence of other emoji strings.
            if (abc.contains(":D")){
                int startSpan = abc.indexOf(":D");
                d = getResources().getDrawable(R.drawable.laugh); // I have kept laugh.png of size 24x24 in drawable folder.
                d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
                span = new ImageSpan(d, ImageSpan.ALIGN_BASELINE);
                ss.setSpan(span, startSpan, startSpan+2, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
                abc = abc.replaceFirst(":D","  "); //replace with two blank spaces.
            }
            //to check other types of emoji, use else if ladder and place the similar code.
        }
        textBox.append(ss);
    }
}

如何用EditText中的图像替换String？

2 个答案: