Question

上一个问题：
我可以知道为什么当我尝试启动RecyclerView活动从片段进行搜索时会发生此错误。

添加适配器后：

错误：null对象引用上的OwnerDAO.getOwner（）'

片段代码：

#include <stdio.h>
#include <stdbool.h>
bool prime(int);

int main()
{
int x;
scanf("%d",&x);
if (x < 2)
    printf("its not prime\n");
else
{
    if (prime(x))
        printf("its prime\n");
    else
        printf("its not prime\n");
}
return 0;
}

bool prime(int x)
{
    int i;
    for (i = 2; i*i <= x; i++){
        if (x%i == 0)
            return false;
    }
    return true;
 }

搜索适配器：

  RecyclerView recyclerView;
  RecyclerView.LayoutManager layoutManager;
  SearchAdapter adapter;
  OwnerDAO mOwnerDao;

 public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View v = inflater.inflate(R.layout.activity_search, container, false);
    recyclerView = (RecyclerView)v.findViewById(R.id.recycler_search);
    layoutManager = new LinearLayoutManager(this.getActivity());
    mOwnerDao = new OwnerDAO(getContext())
    adapter = new SearchAdapter(getContext(),mOwnerDao.getOwner());
    recyclerView.setLayoutManager(layoutManager);
    recyclerView.setHasFixedSize(true);
    recyclerView.setAdapter( adapter );

    return v;

   }

Answer 1

在import maya.cmds as mc if mc.window("ram", exists =True): mc.deleteUI(ram) colors = {'Red':(1,0,0), 'Blue':(0,0,1), 'Green':(0,1,0)} shader = 'lambert1' ram = mc.window("Material and Texture",t = "Material and Texture v0.9", w=300, h=300) mc.columnLayout(adj = True) imagePath = mc.internalVar(upd = True)+"icons/scriptlogo.jpg" mc.image(w=300,h=200,image = imagePath) # A dropdown menu deisnged to change material/color of octopus (the colors below are used as a test) menu = mc.optionMenu(label = "Material", cc=setColor) mc.menuItem (label="Red") mc.menuItem (label="Blue") mc.menuItem (label="Yellow") mc.menuItem (label="Green") mc.menuItem (label="Orange") mc.menuItem (label="Purple") def setColor(*args): colorName = mc.optionMenu(menu, q=1, v=1) if colorName in colors.keys(): cmds.setAttr("{}.color".format(shader), *colors[colorName]) # A slider designed to alter the intensity of the octopus' texture mc.intSliderGrp (label="Texture", min=0, max=10, field=True) mc.showWindow(ram)之后设置using System; using System.Net.Mail; using System.Windows.Forms; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { try { MailMessage mail = new MailMessage(); using (var smtpobj = new SmtpClient("smtp.gmail.com")) { mail.To.Add("xxx@gmail.com"); mail.From = new MailAddress("yyy@gmail.com"); mail.Subject = "subject - .net app"; mail.Body = "body"; smtpobj.Port = 587; smtpobj.Credentials = new System.Net.NetworkCredential("yyy@gmail.com", "xyz"); smtpobj.EnableSsl = true; smtpobj.Send(mail); smtpobj.ServicePoint.CloseConnectionGroup( smtpobj.ServicePoint.ConnectionName); } } catch(Exception ex) { string strReturn = ex.ToString(); MessageBox.Show(strReturn); } } } }，如下所示： -

layoutManager

错误将被删除!!

应用程序null对象引用

1 个答案: