高亮TextView某个单词

public class TextViewLinkActivity extends Activity {  
    TextView myTextView;  
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
        myTextView = (TextView) this.findViewById(R.id.myTextView);  
          
        //创建一个 SpannableString对象  
        SpannableString sp = new SpannableString("这句话中有百度超链接,有高亮显示，这样，或者这样，还有斜体.");  
        //设置超链接  
        sp.setSpan(new URLSpan("http://www.baidu.com"), 5, 7,  
                Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);  
        //设置高亮样式一  
        sp.setSpan(new BackgroundColorSpan(Color.RED), 17 ,19,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);  
        //设置高亮样式二  
        sp.setSpan(new ForegroundColorSpan(Color.YELLOW),20,24,Spannable.SPAN_EXCLUSIVE_INCLUSIVE);    
        //设置斜体  
        sp.setSpan(new StyleSpan(android.graphics.Typeface.BOLD_ITALIC), 27, 29, Spannable.SPAN_EXCLUSIVE_INCLUSIVE);  
        //SpannableString对象设置给TextView  
        myTextView.setText(sp);  
        //设置TextView可点击  
        myTextView.setMovementMethod(LinkMovementMethod.getInstance());  
    }