android中搜索关键字高亮

"font-size:18px;">import android.graphics.Color;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.ForegroundColorSpan;
import android.widget.TextView;

import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class MainActivity extends ActionBarActivity {
    private TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tv = (TextView) findViewById(R.id.tv);

        tv.setText(setKeyWordColor("aadfdkfdjf你大理石","你"));
    }

    /**
     * 设置搜索关键字高亮
     * @param content 原文本内容
     * @param keyword 关键字
     */
    private SpannableString setKeyWordColor(String content,String keyword){
        SpannableString s = new SpannableString(content);
        Pattern p = Pattern.compile(keyword);
        Matcher m = p.matcher(s);
        while (m.find()){
            int start = m.start();
            int end = m.end();
            s.setSpan(new ForegroundColorSpan(Color.RED),start,end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        }
        return s;
    }
}