Update strings.xml

    <string name="file_saved">文件保存成功</string>

    <string name="invalid_file_format">无效文件格式</string>

    <string name="out_of_memory_error">内存不足</string>

    <string name="an_error_occurred">啊哦，出错啦: %s</string>

    <string name="an_error_occurred">啊哦，出错啦： %s</string>

    <string name="open_with">打开方式</string>

    <string name="no_app_found">未找到可用应用</string>

    <string name="set_as">设置为</string>