如果是在资源文件里，可以这样写.
< resources >
< string name = "hello" > < u > phone: 1390123456 </ u > </ string >
< string name = "app_name" > MyLink </ string >
</ resources >
<resources>
<string name="hello"><u>phone: 1390123456</u></string>
<string name="app_name">MyLink</string>
</resources>
如果是代码这样写
TextView textView = (TextView)findViewById(R.id.testView);
textView.setText(Html.fromHtml("<u>" + "hahaha" + "</u>" ));