SpannableString 给TextView添加不同的显示样式

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TextView是用来显示文本的，有时需要给TextView中的个别字设置为超链接，或者设置个别字的颜色、字体等，那就需要用到Spannable对象，可以借助Spannable对象实现以上设置
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());

关键方法：
public void setSpan (Object what, int start, int end, int flags)

下面是一个详细的例子：

public class TextViewJump2Activity extends Activity {private TextView mClickableText;@Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        LinearLayout layout = new LinearLayout(this);mClickableText = new TextView(this);mClickableText.setClickable(true);mClickableText.setTextSize(20);layout.addView(mClickableText);setContentView(layout);mClickableText.setText(getClickableSpan());mClickableText.setMovementMethod(LinkMovementMethod.getInstance());}private SpannableString getClickableSpan() {View.OnClickListener l = new View.OnClickListener() {public void onClick(View v) {Toast.makeText(TextViewJump2Activity.this, "Click Success", Toast.LENGTH_SHORT).show();//在这里就可以做跳转到activity或者弹出对话框的操作了}};SpannableString spanableInfo = new SpannableString("This is a test, Click Here!");int start = 16;int end = spanableInfo.length();spanableInfo.setSpan(new Clickable(l), start, end,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);return spanableInfo;}}

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