error: Error: No resource found that matches the given name (at 'text' with value '@string/

错误提示：error: Error: No resource found that matches the given name (at 'text' with value '@string/
 hello2').

解决方法：

在/res/values/strings.xml 添加上你问题里面补充的内容就可以了

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="hello">这是第一个Activity。</string>
    <string name="hello2">这是第二个Activity。</string>
    <string name="app_name">Examples_03_04</string>

</resources>